New design for second user testing

[api] Add interface for adding contacts remotely

See merge request briar/briar!1007

bramble-api/src/main/java/org/briarproject/bramble/api/contact/ContactManager.java

@@ -13,6 +13,8 @@ import java.util.Collection;
 
 import javax.annotation.Nullable;
 
+import static org.briarproject.bramble.api.contact.PendingContact.PendingContactState.FAILED;
+
 @NotNullByDefault
 public interface ContactManager {
 
@@ -52,6 +54,35 @@ public interface ContactManager {
 			long timestamp, boolean alice, boolean verified, boolean active)
 			throws DbException;
 
+	/**
+	 * Returns the static link that needs to be sent to the contact to be added.
+	 */
+	String getRemoteContactLink();
+
+	/**
+	 * Returns true if the given link is syntactically valid.
+	 */
+	boolean isValidRemoteContactLink(String link);
+
+	/**
+	 * Requests a new contact to be added via the given {@code link}.
+	 *
+	 * @param link The link received from the contact we want to add.
+	 * @param alias The alias the user has given this contact.
+	 * @return A PendingContact representing the contact to be added.
+	 */
+	PendingContact addRemoteContactRequest(String link, String alias);
+
+	/**
+	 * Returns a list of {@link PendingContact}s.
+	 */
+	Collection<PendingContact> getPendingContacts();
+
+	/**
+	 * Removes a {@link PendingContact} that is in state {@link FAILED}.
+	 */
+	void removePendingContact(PendingContact pendingContact);
+
 	/**
 	 * Returns the contact with the given ID.
 	 */

bramble-api/src/main/java/org/briarproject/bramble/api/contact/PendingContact.java

@@ -0,0 +1,54 @@
+package org.briarproject.bramble.api.contact;
+
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
+
+import javax.annotation.concurrent.Immutable;
+
+@Immutable
+@NotNullByDefault
+public class PendingContact {
+
+	public enum PendingContactState {
+		WAITING_FOR_CONNECTION,
+		CONNECTED,
+		ADDING_CONTACT,
+		FAILED
+	}
+
+	private final PendingContactId id;
+	private final String alias;
+	private final PendingContactState state;
+	private final long timestamp;
+
+	public PendingContact(PendingContactId id, String alias,
+			PendingContactState state, long timestamp) {
+		this.id = id;
+		this.alias = alias;
+		this.state = state;
+		this.timestamp = timestamp;
+	}
+
+	public String getAlias() {
+		return alias;
+	}
+
+	public PendingContactState getState() {
+		return state;
+	}
+
+	public long getTimestamp() {
+		return timestamp;
+	}
+
+	@Override
+	public int hashCode() {
+		return id.hashCode();
+	}
+
+	@Override
+	public boolean equals(Object o) {
+		return o instanceof PendingContact &&
+				id.equals(((PendingContact) o).id);
+	}
+
+}

bramble-api/src/main/java/org/briarproject/bramble/api/contact/PendingContactId.java

@@ -0,0 +1,11 @@
+package org.briarproject.bramble.api.contact;
+
+import org.briarproject.bramble.api.UniqueId;
+
+public class PendingContactId extends UniqueId {
+
+	public PendingContactId(byte[] id) {
+		super(id);
+	}
+
+}

bramble-api/src/main/java/org/briarproject/bramble/api/contact/event/PendingContactStateChangedEvent.java

@@ -0,0 +1,34 @@
+package org.briarproject.bramble.api.contact.event;
+
+import org.briarproject.bramble.api.contact.PendingContact.PendingContactState;
+import org.briarproject.bramble.api.contact.PendingContactId;
+import org.briarproject.bramble.api.event.Event;
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
+
+import javax.annotation.concurrent.Immutable;
+
+/**
+ * An event that is broadcast when a pending contact's state is changed.
+ */
+@Immutable
+@NotNullByDefault
+public class PendingContactStateChangedEvent extends Event {
+
+	private final PendingContactId id;
+	private final PendingContactState state;
+
+	public PendingContactStateChangedEvent(PendingContactId id,
+			PendingContactState state) {
+		this.id = id;
+		this.state = state;
+	}
+
+	public PendingContactId getId() {
+		return id;
+	}
+
+	public PendingContactState getPendingContactState() {
+		return state;
+	}
+
+}

bramble-api/src/main/java/org/briarproject/bramble/util/StringUtils.java

@@ -153,4 +153,15 @@ public class StringUtils {
 		return new String(c);
 	}
 
+
+	public static String getRandomBase32String(int length) {
+		char[] c = new char[length];
+		for (int i = 0; i < length; i++) {
+			int character = random.nextInt(32);
+			if (character < 26) c[i] = (char) ('a' + character);
+			else c[i] = (char) ('2' + (character - 26));
+		}
+		return new String(c);
+	}
+
 }

bramble-core/src/main/java/org/briarproject/bramble/contact/ContactManagerImpl.java

@@ -3,6 +3,8 @@ package org.briarproject.bramble.contact;
 import org.briarproject.bramble.api.contact.Contact;
 import org.briarproject.bramble.api.contact.ContactId;
 import org.briarproject.bramble.api.contact.ContactManager;
+import org.briarproject.bramble.api.contact.PendingContact;
+import org.briarproject.bramble.api.contact.PendingContactId;
 import org.briarproject.bramble.api.crypto.SecretKey;
 import org.briarproject.bramble.api.db.DatabaseComponent;
 import org.briarproject.bramble.api.db.DbException;
@@ -19,12 +21,16 @@ import org.briarproject.bramble.api.transport.KeyManager;
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.List;
+import java.util.Random;
 import java.util.concurrent.CopyOnWriteArrayList;
+import java.util.regex.Pattern;
 
 import javax.annotation.Nullable;
 import javax.annotation.concurrent.ThreadSafe;
 import javax.inject.Inject;
 
+import static java.util.Collections.emptyList;
+import static org.briarproject.bramble.api.contact.PendingContact.PendingContactState.WAITING_FOR_CONNECTION;
 import static org.briarproject.bramble.api.identity.AuthorConstants.MAX_AUTHOR_NAME_LENGTH;
 import static org.briarproject.bramble.api.identity.AuthorInfo.Status.OURSELVES;
 import static org.briarproject.bramble.api.identity.AuthorInfo.Status.UNKNOWN;
@@ -36,6 +42,12 @@ import static org.briarproject.bramble.util.StringUtils.toUtf8;
 @NotNullByDefault
 class ContactManagerImpl implements ContactManager {
 
+	private static final int LINK_LENGTH = 64;
+	private static final String REMOTE_CONTACT_LINK =
+			"briar://" + getRandomBase32String(LINK_LENGTH);
+	private static final Pattern LINK_REGEX =
+			Pattern.compile("(briar://)?([a-z2-7]{" + LINK_LENGTH + "})");
+
 	private final DatabaseComponent db;
 	private final KeyManager keyManager;
 	private final IdentityManager identityManager;
@@ -84,6 +96,48 @@ class ContactManagerImpl implements ContactManager {
 						verified, active));
 	}
 
+	@Override
+	public String getRemoteContactLink() {
+		// TODO replace with real implementation
+		return REMOTE_CONTACT_LINK;
+	}
+
+	@SuppressWarnings("SameParameterValue")
+	private static String getRandomBase32String(int length) {
+		Random random = new Random();
+		char[] c = new char[length];
+		for (int i = 0; i < length; i++) {
+			int character = random.nextInt(32);
+			if (character < 26) c[i] = (char) ('a' + character);
+			else c[i] = (char) ('2' + (character - 26));
+		}
+		return new String(c);
+	}
+
+	@Override
+	public boolean isValidRemoteContactLink(String link) {
+		return LINK_REGEX.matcher(link).matches();
+	}
+
+	@Override
+	public PendingContact addRemoteContactRequest(String link, String alias) {
+		// TODO replace with real implementation
+		PendingContactId id = new PendingContactId(link.getBytes());
+		return new PendingContact(id, alias, WAITING_FOR_CONNECTION,
+				System.currentTimeMillis());
+	}
+
+	@Override
+	public Collection<PendingContact> getPendingContacts() {
+		// TODO replace with real implementation
+		return emptyList();
+	}
+
+	@Override
+	public void removePendingContact(PendingContact pendingContact) {
+		// TODO replace with real implementation
+	}
+
 	@Override
 	public Contact getContact(ContactId c) throws DbException {
 		return db.transactionWithResult(true, txn -> db.getContact(txn, c));

briar-android/artwork/ic_link_down.svg

@@ -0,0 +1,59 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   style="width:24px;height:24px"
+   viewBox="0 0 24 24"
+   version="1.1"
+   id="svg4"
+   sodipodi:docname="ic_link_down.svg"
+   inkscape:version="0.92.3 (2405546, 2018-03-11)">
+  <metadata
+     id="metadata10">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+        <dc:title></dc:title>
+      </cc:Work>
+    </rdf:RDF>
+  </metadata>
+  <defs
+     id="defs8" />
+  <sodipodi:namedview
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1"
+     objecttolerance="10"
+     gridtolerance="10"
+     guidetolerance="10"
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+     inkscape:pageshadow="2"
+     inkscape:window-width="1920"
+     inkscape:window-height="1020"
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+     showgrid="false"
+     inkscape:zoom="13.906433"
+     inkscape:cx="5.1490538"
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+     inkscape:window-y="24"
+     inkscape:window-maximized="0"
+     inkscape:current-layer="svg4" />
+  <path
+     fill="#000000"
+     d="M16,6H13V7.9H16C18.26,7.9 20.1,9.73 20.1,12A4.1,4.1 0 0,1 16,16.1H13V18H16A6,6 0 0,0 22,12C22,8.68 19.31,6 16,6M3.9,12C3.9,9.73 5.74,7.9 8,7.9H11V6H8A6,6 0 0,0 2,12A6,6 0 0,0 8,18H11V16.1H8C5.74,16.1 3.9,14.26 3.9,12M8,13H16V11H8V13Z"
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+     inkscape:connector-curvature="0"
+     style="fill:#000000;stroke-width:0.38265303" />
+</svg>

briar-android/artwork/ic_link_up.svg

@@ -0,0 +1,58 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   style="width:24px;height:24px"
+   viewBox="0 0 24 24"
+   version="1.1"
+   id="svg4"
+   sodipodi:docname="ic_link_up.svg"
+   inkscape:version="0.92.3 (2405546, 2018-03-11)">
+  <metadata
+     id="metadata10">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+      </cc:Work>
+    </rdf:RDF>
+  </metadata>
+  <defs
+     id="defs8" />
+  <sodipodi:namedview
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1"
+     objecttolerance="10"
+     gridtolerance="10"
+     guidetolerance="10"
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+     inkscape:pageshadow="2"
+     inkscape:window-width="1920"
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+     showgrid="false"
+     inkscape:zoom="13.906433"
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+     inkscape:window-y="24"
+     inkscape:window-maximized="0"
+     inkscape:current-layer="svg4" />
+  <path
+     fill="#000000"
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+     id="path2" />
+  <path
+     id="path884"
+     d="M 21.659779,23.534381 H 19.363861 V 20.473157 H 17.51182 l 3.000001,-3 2.999999,3 h -1.852041 z"
+     inkscape:connector-curvature="0"
+     style="fill:#000000;stroke-width:0.38265303" />
+</svg>

briar-android/artwork/ic_nearby.svg

@@ -0,0 +1,57 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   width="24"
+   height="24"
+   viewBox="0 0 24 24"
+   version="1.1"
+   id="svg12"
+   sodipodi:docname="nearby.svg"
+   style="fill:none"
+   inkscape:version="0.92.3 (2405546, 2018-03-11)">
+  <metadata
+     id="metadata18">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+        <dc:title></dc:title>
+      </cc:Work>
+    </rdf:RDF>
+  </metadata>
+  <defs
+     id="defs16" />
+  <sodipodi:namedview
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1"
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+     guidetolerance="10"
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+  <path
+     style="opacity:1;fill:#110000;fill-opacity:1;fill-rule:evenodd;stroke:none;stroke-width:1.37658679px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
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+     inkscape:connector-curvature="0" />
+</svg>

briar-android/artwork/nickname.svg

@@ -0,0 +1,176 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   width="150"
+   height="178"
+   viewBox="0 0 150 178"
+   fill="none"
+   version="1.1"
+   id="svg129"
+   sodipodi:docname="nickname.svg"
+   inkscape:version="0.92.3 (2405546, 2018-03-11)">
+  <metadata
+     id="metadata133">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+      </cc:Work>
+    </rdf:RDF>
+  </metadata>
+  <sodipodi:namedview
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1"
+     objecttolerance="10"
+     gridtolerance="10"
+     guidetolerance="10"
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+     inkscape:pageshadow="2"
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+     showgrid="false"
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+     style="display:inline;opacity:0.25;fill:#6d6d6d;fill-opacity:0.7" />
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+         stop-opacity="0.25"
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+       id="clip0">
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briar-android/build.gradle

@@ -2,6 +2,70 @@ apply plugin: 'com.android.application'
 apply plugin: 'witness'
 apply from: 'witness.gradle'
 
+// prototype
+repositories {
+	maven { url 'https://jitpack.io' }
+}
+
+dependencies {
+	implementation project(path: ':briar-core', configuration: 'default')
+	implementation project(path: ':bramble-core', configuration: 'default')
+	implementation project(':bramble-android')
+
+	def supportVersion = '28.0.0'
+	implementation "com.android.support:support-v4:$supportVersion"
+	implementation("com.android.support:appcompat-v7:$supportVersion") {
+		exclude module: 'support-v4'
+	}
+	implementation("com.android.support:preference-v14:$supportVersion") {
+		exclude module: 'support-v4'
+	}
+	implementation("com.android.support:design:$supportVersion") {
+		exclude module: 'support-v4'
+		exclude module: 'recyclerview-v7'
+	}
+	implementation "com.android.support:cardview-v7:$supportVersion"
+	implementation "com.android.support:support-annotations:$supportVersion"
+	implementation 'com.android.support.constraint:constraint-layout:1.1.3'
+
+	implementation('ch.acra:acra:4.9.1') {
+		exclude module: 'support-v4'
+		exclude module: 'support-annotations'
+	}
+	implementation 'info.guardianproject.panic:panic:0.5'
+	implementation 'info.guardianproject.trustedintents:trustedintents:0.2'
+	implementation 'de.hdodenhof:circleimageview:2.2.0'
+	implementation 'com.google.zxing:core:3.3.0'
+	implementation 'uk.co.samuelwall:material-tap-target-prompt:2.8.0'
+	implementation 'com.vanniktech:emoji-google:0.5.1'
+
+	annotationProcessor 'com.google.dagger:dagger-compiler:2.0.2'
+
+	compileOnly 'javax.annotation:jsr250-api:1.0'
+
+	testImplementation project(path: ':bramble-api', configuration: 'testOutput')
+	testImplementation project(path: ':bramble-core', configuration: 'testOutput')
+	testImplementation 'org.robolectric:robolectric:3.8'
+	testImplementation 'org.robolectric:shadows-support-v4:3.3.2'
+	testImplementation 'org.mockito:mockito-core:2.13.0'
+	testImplementation 'junit:junit:4.12'
+	testImplementation "org.jmock:jmock:2.8.2"
+	testImplementation "org.jmock:jmock-junit4:2.8.2"
+	testImplementation "org.jmock:jmock-legacy:2.8.2"
+	testImplementation "org.hamcrest:hamcrest-library:1.3"
+	testImplementation "org.hamcrest:hamcrest-core:1.3"
+
+	def espressoVersion = '3.0.2'
+	androidTestImplementation "com.android.support.test.espresso:espresso-core:$espressoVersion"
+	androidTestImplementation "com.android.support.test.espresso:espresso-contrib:$espressoVersion"
+	androidTestImplementation "com.android.support.test.espresso:espresso-intents:$espressoVersion"
+	androidTestImplementation "tools.fastlane:screengrab:1.1.0"
+	androidTestImplementation "com.android.support.test.uiautomator:uiautomator-v18:2.1.3"
+	androidTestAnnotationProcessor "com.google.dagger:dagger-compiler:2.0.2"
+	androidTestCompileOnly 'javax.annotation:jsr250-api:1.0'
+	androidTestImplementation 'junit:junit:4.12'
+}
+
 def getStdout = { command, defaultValue ->
 	def stdout = new ByteArrayOutputStream()
 	try {
@@ -35,7 +99,7 @@ android {
 
 	buildTypes {
 		debug {
-			applicationIdSuffix ".debug"
+			applicationIdSuffix ".test"
 			shrinkResources false
 			minifyEnabled true
 			crunchPngs false
@@ -105,6 +169,7 @@ dependencies {
 	implementation "com.android.support:cardview-v7:$supportVersion"
 	implementation "com.android.support:support-annotations:$supportVersion"
 	implementation "com.android.support:exifinterface:$supportVersion"
+	implementation "com.android.support:palette-v7:$supportVersion"
 	implementation 'com.android.support.constraint:constraint-layout:1.1.3'
 	implementation "android.arch.lifecycle:extensions:1.1.1"
 
@@ -125,6 +190,9 @@ dependencies {
 	}
 	implementation 'com.github.chrisbanes:PhotoView:2.1.4' // later versions already use androidx
 
+	// prototype
+	implementation "com.github.kobakei:MaterialFabSpeedDial:1.2.0"
+
 	annotationProcessor 'com.google.dagger:dagger-compiler:2.19'
 	annotationProcessor "com.github.bumptech.glide:compiler:$glideVersion"
 

briar-android/src/debug/res/values/strings.xml

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
-	<string name="app_name" translatable="false">Briar Debug</string>
-	<string name="app_package" translatable="false">org.briarproject.briar.android.debug</string>
+	<string name="app_name" translatable="false">Briar Test</string>
+	<string name="app_package" translatable="false">org.briarproject.briar.android.test</string>
 </resources>

briar-android/src/main/AndroidManifest.xml

@@ -1,7 +1,8 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest
 	package="org.briarproject.briar"
-	xmlns:android="http://schemas.android.com/apk/res/android">
+	xmlns:android="http://schemas.android.com/apk/res/android"
+	xmlns:tools="http://schemas.android.com/tools">
 
 	<uses-feature android:name="android.hardware.bluetooth" android:required="false"/>
 	<uses-feature android:name="android.hardware.camera" android:required="false"/>
@@ -17,6 +18,7 @@
 	<uses-permission android:name="android.permission.USE_FINGERPRINT"/>
 	<uses-permission android:name="android.permission.VIBRATE" />
 	<uses-permission android:name="android.permission.WAKE_LOCK" />
+	<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
 	<uses-permission-sdk-23 android:name="android.permission.ACCESS_COARSE_LOCATION" />
 	<uses-permission-sdk-23 android:name="android.permission.REQUEST_IGNORE_BATTERY_OPTIMIZATIONS"/>
 	<uses-permission-sdk-23 android:name="android.permission.USE_BIOMETRIC" />
@@ -28,7 +30,8 @@
 		android:label="@string/app_name"
 		android:logo="@mipmap/ic_launcher_round"
 		android:supportsRtl="true"
-		android:theme="@style/BriarTheme">
+		android:theme="@style/BriarTheme"
+		tools:ignore="GoogleAppIndexingWarning">
 
 		<receiver
 			android:name="org.briarproject.briar.android.login.SignInReminderReceiver"
@@ -421,5 +424,29 @@
 			android:launchMode="singleTask"
 			android:theme="@style/BriarTheme.NoActionBar"/>
 
+		<!-- Prototype -->
+		<activity
+			android:name=".android.contact.ContactLinkExchangeActivity"
+			android:theme="@style/BriarTheme"
+			android:label="@string/add_contact_title"
+			android:windowSoftInputMode="stateHidden|adjustResize">
+			<intent-filter>
+				<action android:name="android.intent.action.VIEW" />
+				<category android:name="android.intent.category.DEFAULT" />
+				<category android:name="android.intent.category.BROWSABLE" />
+				<data android:scheme="briar"/>
+			</intent-filter>
+			<intent-filter>
+				<action android:name="android.intent.action.SEND"/>
+				<category android:name="android.intent.category.DEFAULT"/>
+				<data android:mimeType="text/plain"/>
+			</intent-filter>
+		</activity>
+
+		<activity
+			android:name=".android.contact.PendingRequestsActivity"
+			android:label="@string/pending_contact_requests"
+			android:theme="@style/BriarTheme"/>
+
 	</application>
 </manifest>

briar-android/src/main/java/org/briarproject/briar/android/AndroidComponent.java

@@ -32,7 +32,7 @@ import org.briarproject.briar.BriarCoreModule;
 import org.briarproject.briar.android.conversation.glide.BriarModelLoader;
 import org.briarproject.briar.android.login.SignInReminderReceiver;
 import org.briarproject.briar.android.reporting.BriarReportSender;
-import org.briarproject.briar.android.view.TextInputView;
+import org.briarproject.briar.android.view.EmojiTextInputView;
 import org.briarproject.briar.api.android.AndroidNotificationManager;
 import org.briarproject.briar.api.android.DozeWatchdog;
 import org.briarproject.briar.api.android.LockManager;
@@ -169,7 +169,7 @@ public interface AndroidComponent
 
 	void inject(NotificationCleanupService notificationCleanupService);
 
-	void inject(TextInputView textInputView);
+	void inject(EmojiTextInputView textInputView);
 
 	void inject(BriarModelLoader briarModelLoader);
 

briar-android/src/main/java/org/briarproject/briar/android/TestingConstants.java

@@ -30,4 +30,10 @@ public interface TestingConstants {
 	long EXPIRY_DATE = IS_DEBUG_BUILD || IS_BETA_BUILD ?
 			BuildConfig.BuildTimestamp + 90 * 24 * 60 * 60 * 1000L :
 			Long.MAX_VALUE;
+
+	/**
+	 * Feature flag for enabling image attachments.
+	 */
+	boolean FEATURE_FLAG_IMAGE_ATTACHMENTS = IS_DEBUG_BUILD;
+
 }

briar-android/src/main/java/org/briarproject/briar/android/activity/ActivityComponent.java

@@ -15,8 +15,14 @@ import org.briarproject.briar.android.blog.ReblogFragment;
 import org.briarproject.briar.android.blog.RssFeedImportActivity;
 import org.briarproject.briar.android.blog.RssFeedManageActivity;
 import org.briarproject.briar.android.blog.WriteBlogPostActivity;
+import org.briarproject.briar.android.contact.ContactLinkExchangeActivity;
+import org.briarproject.briar.android.contact.ContactLinkExchangeFragment;
 import org.briarproject.briar.android.contact.ContactListFragment;
 import org.briarproject.briar.android.contact.ContactModule;
+import org.briarproject.briar.android.contact.ContactNicknameFragment;
+import org.briarproject.briar.android.contact.ContactQrCodeInputFragment;
+import org.briarproject.briar.android.contact.ContactQrCodeOutputFragment;
+import org.briarproject.briar.android.contact.PendingRequestsActivity;
 import org.briarproject.briar.android.conversation.AliasDialogFragment;
 import org.briarproject.briar.android.conversation.ConversationActivity;
 import org.briarproject.briar.android.conversation.ImageActivity;
@@ -171,6 +177,10 @@ public interface ActivityComponent {
 
 	void inject(UnlockActivity activity);
 
+	void inject(ContactLinkExchangeActivity activity);
+
+	void inject(PendingRequestsActivity activity);
+
 	// Fragments
 	void inject(AuthorNameFragment fragment);
 
@@ -218,4 +228,12 @@ public interface ActivityComponent {
 
 	void inject(AliasDialogFragment aliasDialogFragment);
 
+	void inject(ContactLinkExchangeFragment fragment);
+
+	void inject(ContactNicknameFragment fragment);
+
+	void inject(ContactQrCodeOutputFragment fragment);
+
+	void inject(ContactQrCodeInputFragment fragment);
+
 }

briar-android/src/main/java/org/briarproject/briar/android/activity/RequestCodes.java

@@ -14,5 +14,7 @@ public interface RequestCodes {
 	int REQUEST_BLUETOOTH_DISCOVERABLE = 10;
 	int REQUEST_UNLOCK = 11;
 	int REQUEST_KEYGUARD_UNLOCK = 12;
+	int REQUEST_ATTACH_IMAGE = 13;
+	int REQUEST_SAVE_ATTACHMENT = 14;
 
 }

briar-android/src/main/java/org/briarproject/briar/android/blog/ReblogFragment.java

@@ -1,5 +1,6 @@
 package org.briarproject.briar.android.blog;
 
+import android.net.Uri;
 import android.os.Bundle;
 import android.view.LayoutInflater;
 import android.view.View;
@@ -18,7 +19,10 @@ import org.briarproject.briar.android.controller.handler.UiExceptionHandler;
 import org.briarproject.briar.android.controller.handler.UiResultExceptionHandler;
 import org.briarproject.briar.android.fragment.BaseFragment;
 import org.briarproject.briar.android.view.TextInputView;
-import org.briarproject.briar.android.view.TextInputView.TextInputListener;
+import org.briarproject.briar.android.view.TextSendController;
+import org.briarproject.briar.android.view.TextSendController.SendListener;
+
+import java.util.List;
 
 import javax.annotation.Nullable;
 import javax.inject.Inject;
@@ -29,10 +33,11 @@ import static android.view.View.INVISIBLE;
 import static android.view.View.VISIBLE;
 import static org.briarproject.briar.android.activity.BriarActivity.GROUP_ID;
 import static org.briarproject.briar.android.blog.BasePostFragment.POST_ID;
+import static org.briarproject.briar.api.blog.BlogConstants.MAX_BLOG_POST_TEXT_LENGTH;
 
 @MethodsNotNullByDefault
 @ParametersNotNullByDefault
-public class ReblogFragment extends BaseFragment implements TextInputListener {
+public class ReblogFragment extends BaseFragment implements SendListener {
 
 	public static final String TAG = ReblogFragment.class.getName();
 
@@ -77,7 +82,11 @@ public class ReblogFragment extends BaseFragment implements TextInputListener {
 		View v = inflater.inflate(R.layout.fragment_reblog, container, false);
 		ui = new ViewHolder(v);
 		ui.post.setTransitionName(postId);
-		ui.input.setSendButtonEnabled(false);
+		TextSendController sendController =
+				new TextSendController(ui.input, this, true);
+		ui.input.setSendController(sendController);
+		ui.input.setEnabled(false);
+		ui.input.setMaxTextLength(MAX_BLOG_POST_TEXT_LENGTH);
 		showProgressBar();
 
 		return v;
@@ -112,16 +121,14 @@ public class ReblogFragment extends BaseFragment implements TextInputListener {
 		ui.post.bindItem(item);
 		ui.post.hideReblogButton();
 
-		ui.input.setListener(this);
-		ui.input.setSendButtonEnabled(true);
+		ui.input.setEnabled(true);
 		ui.scrollView.post(() -> ui.scrollView.fullScroll(FOCUS_DOWN));
 	}
 
 	@Override
-	public void onSendClick(String text) {
+	public void onSendClick(@Nullable String text, List<Uri> imageUris) {
 		ui.input.hideSoftKeyboard();
-		String comment = getComment();
-		feedController.repeatPost(item, comment,
+		feedController.repeatPost(item, text,
 				new UiExceptionHandler<DbException>(this) {
 					@Override
 					public void onExceptionUi(DbException exception) {
@@ -131,12 +138,6 @@ public class ReblogFragment extends BaseFragment implements TextInputListener {
 		finish();
 	}
 
-	@Nullable
-	private String getComment() {
-		if (ui.input.getText().length() == 0) return null;
-		return ui.input.getText().toString();
-	}
-
 	private void showProgressBar() {
 		ui.progressBar.setVisibility(VISIBLE);
 		ui.input.setVisibility(GONE);

briar-android/src/main/java/org/briarproject/briar/android/blog/WriteBlogPostActivity.java

@@ -1,9 +1,9 @@
 package org.briarproject.briar.android.blog;
 
 import android.content.Intent;
+import android.net.Uri;
 import android.os.Bundle;
-import android.text.Editable;
-import android.text.TextWatcher;
+import android.support.annotation.Nullable;
 import android.view.KeyEvent;
 import android.view.MenuItem;
 import android.widget.ProgressBar;
@@ -14,19 +14,22 @@ import org.briarproject.bramble.api.FormatException;
 import org.briarproject.bramble.api.db.DbException;
 import org.briarproject.bramble.api.identity.IdentityManager;
 import org.briarproject.bramble.api.identity.LocalAuthor;
+import org.briarproject.bramble.api.nullsafety.MethodsNotNullByDefault;
+import org.briarproject.bramble.api.nullsafety.ParametersNotNullByDefault;
 import org.briarproject.bramble.api.sync.GroupId;
-import org.briarproject.bramble.util.StringUtils;
 import org.briarproject.briar.R;
 import org.briarproject.briar.android.activity.ActivityComponent;
 import org.briarproject.briar.android.activity.BriarActivity;
 import org.briarproject.briar.android.view.TextInputView;
-import org.briarproject.briar.android.view.TextInputView.TextInputListener;
+import org.briarproject.briar.android.view.TextSendController;
+import org.briarproject.briar.android.view.TextSendController.SendListener;
 import org.briarproject.briar.api.android.AndroidNotificationManager;
 import org.briarproject.briar.api.blog.BlogManager;
 import org.briarproject.briar.api.blog.BlogPost;
 import org.briarproject.briar.api.blog.BlogPostFactory;
 
 import java.security.GeneralSecurityException;
+import java.util.List;
 import java.util.logging.Logger;
 
 import javax.inject.Inject;
@@ -35,10 +38,13 @@ import static android.view.View.GONE;
 import static android.view.View.VISIBLE;
 import static java.util.logging.Level.WARNING;
 import static org.briarproject.bramble.util.LogUtils.logException;
+import static org.briarproject.bramble.util.StringUtils.isNullOrEmpty;
 import static org.briarproject.briar.api.blog.BlogConstants.MAX_BLOG_POST_TEXT_LENGTH;
 
+@MethodsNotNullByDefault
+@ParametersNotNullByDefault
 public class WriteBlogPostActivity extends BriarActivity
-		implements OnEditorActionListener, TextInputListener {
+		implements OnEditorActionListener, SendListener {
 
 	private static final Logger LOG =
 			Logger.getLogger(WriteBlogPostActivity.class.getName());
@@ -58,9 +64,8 @@ public class WriteBlogPostActivity extends BriarActivity
 	@Inject
 	volatile BlogManager blogManager;
 
-	@SuppressWarnings("ConstantConditions")
 	@Override
-	public void onCreate(Bundle state) {
+	public void onCreate(@Nullable Bundle state) {
 		super.onCreate(state);
 
 		Intent i = getIntent();
@@ -71,24 +76,10 @@ public class WriteBlogPostActivity extends BriarActivity
 		setContentView(R.layout.activity_write_blog_post);
 
 		input = findViewById(R.id.textInput);
-		input.setSendButtonEnabled(false);
-		input.addTextChangedListener(new TextWatcher() {
-			@Override
-			public void beforeTextChanged(CharSequence s, int start, int count,
-					int after) {
-			}
-
-			@Override
-			public void onTextChanged(CharSequence s, int start, int before,
-					int count) {
-			}
-
-			@Override
-			public void afterTextChanged(Editable s) {
-				enableOrDisablePublishButton();
-			}
-		});
-		input.setListener(this);
+		TextSendController sendController =
+				new TextSendController(input, this, false);
+		input.setSendController(sendController);
+		input.setMaxTextLength(MAX_BLOG_POST_TEXT_LENGTH);
 
 		progressBar = findViewById(R.id.progressBar);
 	}
@@ -127,18 +118,15 @@ public class WriteBlogPostActivity extends BriarActivity
 		return true;
 	}
 
-	private void enableOrDisablePublishButton() {
-		input.setSendButtonEnabled(input.getText().length() > 0);
-	}
-
 	@Override
-	public void onSendClick(String text) {
+	public void onSendClick(@Nullable String text, List<Uri> imageUris) {
+		if (isNullOrEmpty(text)) throw new AssertionError();
+
 		// hide publish button, show progress bar
 		input.hideSoftKeyboard();
 		input.setVisibility(GONE);
 		progressBar.setVisibility(VISIBLE);
 
-		text = StringUtils.truncateUtf8(text, MAX_BLOG_POST_TEXT_LENGTH);
 		storePost(text);
 	}
 

briar-android/src/main/java/org/briarproject/briar/android/contact/ContactLinkExchangeActivity.java

@@ -0,0 +1,196 @@
+package org.briarproject.briar.android.contact;
+
+import android.app.AlarmManager;
+import android.app.PendingIntent;
+import android.content.Intent;
+import android.os.Bundle;
+import android.support.v7.app.ActionBar;
+import android.view.MenuItem;
+
+import org.briarproject.bramble.api.contact.ContactId;
+import org.briarproject.bramble.api.db.DbException;
+import org.briarproject.bramble.api.lifecycle.LifecycleManager;
+import org.briarproject.bramble.api.plugin.ConnectionRegistry;
+import org.briarproject.bramble.api.plugin.TorConstants;
+import org.briarproject.bramble.api.system.Clock;
+import org.briarproject.briar.R;
+import org.briarproject.briar.android.activity.ActivityComponent;
+import org.briarproject.briar.android.activity.BriarActivity;
+import org.briarproject.briar.android.fragment.BaseFragment.BaseFragmentListener;
+import org.briarproject.briar.api.messaging.MessagingManager;
+
+import java.util.logging.Logger;
+import java.util.regex.Pattern;
+
+import javax.annotation.Nullable;
+import javax.inject.Inject;
+
+import static android.app.AlarmManager.ELAPSED_REALTIME;
+import static android.content.Intent.ACTION_SEND;
+import static android.content.Intent.ACTION_VIEW;
+import static android.content.Intent.EXTRA_TEXT;
+import static android.content.Intent.FLAG_ACTIVITY_NEW_TASK;
+import static android.os.SystemClock.elapsedRealtime;
+import static java.lang.String.CASE_INSENSITIVE_ORDER;
+import static java.util.Objects.requireNonNull;
+import static java.util.concurrent.TimeUnit.SECONDS;
+import static java.util.logging.Level.WARNING;
+import static org.briarproject.bramble.api.lifecycle.LifecycleManager.LifecycleState.RUNNING;
+import static org.briarproject.bramble.util.LogUtils.logException;
+import static org.briarproject.bramble.util.StringUtils.getRandomBase32String;
+
+public class ContactLinkExchangeActivity extends BriarActivity implements
+		BaseFragmentListener {
+
+	private static final Logger LOG =
+			Logger.getLogger(ContactLinkExchangeActivity.class.getName());
+
+	static final int LINK_LENGTH = 128;
+	static final Pattern LINK_REGEX =
+			Pattern.compile("(briar://)?([a-z2-7]{" + LINK_LENGTH + "})");
+	static final String OUR_LINK = "briar://" + getRandomBase32String(LINK_LENGTH);;
+
+	@Inject
+	LifecycleManager lifecycleManager;
+	@Inject
+	MessagingManager messagingManager;
+	@Inject
+	ConnectionRegistry connectionRegistry;
+	@Inject
+	Clock clock;
+
+	@Override
+	public void injectActivity(ActivityComponent component) {
+		component.inject(this);
+	}
+
+	@Override
+	public void onCreate(@Nullable Bundle state) {
+		super.onCreate(state);
+		setContentView(R.layout.activity_fragment_container);
+
+		ActionBar ab = getSupportActionBar();
+		if (ab != null) {
+			ab.setDisplayHomeAsUpEnabled(true);
+		}
+
+		Intent i = getIntent();
+		if (i != null) {
+			String action = i.getAction();
+			if (ACTION_SEND.equals(action) || ACTION_VIEW.equals(action)) {
+				String text = i.getStringExtra(EXTRA_TEXT);
+				if (text != null) {
+					showInitialFragment(
+							ContactLinkExchangeFragment.newInstance(text));
+					return;
+				}
+				String uri = i.getDataString();
+				if (uri != null) {
+					showInitialFragment(
+							ContactLinkExchangeFragment.newInstance(uri));
+					return;
+				}
+			} else if ("addContact".equals(action)) {
+				removeFakeRequest(i.getStringExtra("name"),
+						i.getLongExtra("timestamp", 0), i.getLongExtra("addAt", 0));
+				setIntent(null);
+				finish();
+			}
+		}
+		if (state == null) {
+			showInitialFragment(new ContactLinkExchangeFragment());
+		}
+	}
+
+	@Override
+	public boolean onOptionsItemSelected(MenuItem item) {
+		switch (item.getItemId()) {
+			case android.R.id.home:
+				onBackPressed();
+				return true;
+			default:
+				return super.onOptionsItemSelected(item);
+		}
+	}
+
+	boolean isBriarLink(@Nullable CharSequence s) {
+		return s != null && LINK_REGEX.matcher(s).matches();
+	}
+
+	void scanCode() {
+		showNextFragment(new ContactQrCodeInputFragment());
+	}
+
+	void linkScanned(@Nullable String link) {
+		// FIXME: Contact name is lost
+		showNextFragment(ContactLinkExchangeFragment.newInstance(link));
+	}
+
+	void showCode() {
+		showNextFragment(new ContactQrCodeOutputFragment());
+	}
+
+	void addFakeRequest(String name, String link) {
+
+		AlarmManager alarmManager =
+				(AlarmManager) requireNonNull(getSystemService(ALARM_SERVICE));
+		double random = getPseudoRandom(link, OUR_LINK.replace("briar://", ""));
+		long m = SECONDS.toMillis(50);
+		long fromNow = (long) (-m * Math.log(random));
+		// it should take at least 30 seconds
+		if (fromNow < SECONDS.toMillis(30)) fromNow = SECONDS.toMillis(30);
+		LOG.info("Delay " + fromNow + " ms based on seed " + random);
+		long triggerAt = elapsedRealtime() + fromNow;
+
+		long timestamp = clock.currentTimeMillis();
+		try {
+			messagingManager.addNewPendingContact(name, timestamp, timestamp + fromNow);
+		} catch (DbException e) {
+			logException(LOG, WARNING, e);
+		}
+
+		Intent i = new Intent(this, ContactLinkExchangeActivity.class);
+		i.setAction("addContact");
+		i.setFlags(FLAG_ACTIVITY_NEW_TASK);
+		i.putExtra("name", name);
+		i.putExtra("timestamp", timestamp);
+		i.putExtra("addAt", timestamp + fromNow);
+		PendingIntent pendingIntent =
+				PendingIntent.getActivity(this, (int) timestamp / 1000, i, 0);
+		alarmManager.set(ELAPSED_REALTIME, triggerAt, pendingIntent);
+	}
+
+	/**
+	 * Returns a pseudo-random value greater than or equal to 0 and less than 1,
+	 * approximately uniformly distributed, based on the given strings. The
+	 * same value is returned if the strings are swapped.
+	 */
+	private double getPseudoRandom(String a, String b) {
+		String first, second;
+		if (CASE_INSENSITIVE_ORDER.compare(a, b) < 0) {
+			first = a;
+			second = b;
+		} else {
+			first = b;
+			second = a;
+		}
+		int hash = (first + second).hashCode() & Integer.MAX_VALUE;
+		return hash / (1.0 + Integer.MAX_VALUE);
+	}
+
+	private void removeFakeRequest(String name, long timestamp, long addAt) {
+		if (lifecycleManager.getLifecycleState() != RUNNING) {
+			LOG.info("Lifecycle not started, not adding contact " + name);
+			return;
+		}
+		LOG.info("Adding Contact " + name);
+		try {
+			ContactId c = messagingManager
+					.removePendingContact(name, timestamp, addAt);
+			// fake contact online status
+			connectionRegistry.registerConnection(c, TorConstants.ID, true);
+		} catch (DbException e) {
+			logException(LOG, WARNING, e);
+		}
+	}
+}

briar-android/src/main/java/org/briarproject/briar/android/contact/ContactLinkExchangeFragment.java

@@ -0,0 +1,184 @@
+package org.briarproject.briar.android.contact;
+
+import android.content.ClipData;
+import android.content.ClipboardManager;
+import android.graphics.drawable.Drawable;
+import android.os.Bundle;
+import android.support.annotation.NonNull;
+import android.support.design.widget.TextInputEditText;
+import android.support.design.widget.TextInputLayout;
+import android.support.v4.app.ShareCompat.IntentBuilder;
+import android.support.v7.widget.AppCompatImageButton;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.Button;
+import android.widget.TextView;
+import android.widget.Toast;
+
+import org.briarproject.briar.R;
+import org.briarproject.briar.android.activity.ActivityComponent;
+import org.briarproject.briar.android.fragment.BaseFragment;
+
+import java.util.regex.Matcher;
+
+import javax.annotation.Nullable;
+
+import static android.content.Context.CLIPBOARD_SERVICE;
+import static android.os.Build.VERSION.SDK_INT;
+import static android.support.v4.graphics.drawable.DrawableCompat.setTint;
+import static android.support.v4.graphics.drawable.DrawableCompat.wrap;
+import static android.widget.Toast.LENGTH_SHORT;
+import static java.util.Objects.requireNonNull;
+import static org.briarproject.briar.android.contact.ContactLinkExchangeActivity.LINK_REGEX;
+import static org.briarproject.briar.android.contact.ContactLinkExchangeActivity.OUR_LINK;
+import static org.briarproject.briar.android.util.UiUtils.resolveColorAttribute;
+
+public class ContactLinkExchangeFragment extends BaseFragment {
+
+	static final String TAG = ContactLinkExchangeFragment.class.getName();
+
+	static BaseFragment newInstance(@Nullable String link) {
+		BaseFragment f = new ContactLinkExchangeFragment();
+		Bundle bundle = new Bundle();
+		bundle.putString("link", link);
+		f.setArguments(bundle);
+		return f;
+	}
+
+	private ClipboardManager clipboard;
+	private TextInputLayout linkInputLayout;
+	private TextInputEditText linkInput;
+
+	@Override
+	public String getUniqueTag() {
+		return TAG;
+	}
+
+	@Override
+	public void injectFragment(ActivityComponent component) {
+		component.inject(this);
+	}
+
+	@Nullable
+	@Override
+	public View onCreateView(@NonNull LayoutInflater inflater,
+			@Nullable ViewGroup container,
+			@Nullable Bundle savedInstanceState) {
+		if (getActivity() == null || getContext() == null) return null;
+
+		getActivity().setTitle(R.string.add_contact_remotely_title_case);
+
+		View v = inflater.inflate(R.layout.fragment_contact_link_exchange,
+				container, false);
+
+		clipboard = (ClipboardManager) requireNonNull(
+				getContext().getSystemService(CLIPBOARD_SERVICE));
+
+		int color =
+				resolveColorAttribute(getContext(), R.attr.colorControlNormal);
+
+		Button continueButton = v.findViewById(R.id.addButton);
+		continueButton.setOnClickListener(view -> onContinueButtonClicked());
+
+		linkInputLayout = v.findViewById(R.id.linkInputLayout);
+		linkInput = v.findViewById(R.id.linkInput);
+		if (SDK_INT < 23) {
+			Drawable drawable = wrap(linkInput.getCompoundDrawables()[0]);
+			setTint(drawable, color);
+			linkInput.setCompoundDrawables(drawable, null, null, null);
+		}
+		if (getArguments() != null)
+			linkInput.setText(getArguments().getString("link"));
+
+		AppCompatImageButton pasteButton = v.findViewById(R.id.pasteButton);
+		pasteButton.setOnClickListener(view -> {
+			ClipData clip = clipboard.getPrimaryClip();
+			if (clip != null)
+				linkInput.setText(clip.getItemAt(0).getText());
+		});
+
+		Button scanCodeButton = v.findViewById(R.id.scanCodeButton);
+		scanCodeButton.setOnClickListener(view -> {
+			ContactLinkExchangeActivity activity = getCastActivity();
+			if (activity != null) activity.scanCode();
+		});
+
+		TextView linkView = v.findViewById(R.id.linkView);
+		linkView.setText(OUR_LINK);
+
+		ClipData clip = ClipData.newPlainText(
+				getString(R.string.link_clip_label), OUR_LINK);
+
+		Button copyButton = v.findViewById(R.id.copyButton);
+		copyButton.setOnClickListener(view -> {
+			clipboard.setPrimaryClip(clip);
+			Toast.makeText(getContext(), R.string.link_copied_toast,
+					LENGTH_SHORT).show();
+		});
+
+		Button shareButton = v.findViewById(R.id.shareButton);
+		shareButton.setOnClickListener(view -> {
+			IntentBuilder.from(getActivity())
+					.setText(OUR_LINK)
+					.setType("text/plain")
+					.startChooser();
+		});
+
+		Button showCodeButton = v.findViewById(R.id.showCodeButton);
+		showCodeButton.setOnClickListener(
+				view -> {
+					ContactLinkExchangeActivity activity = getCastActivity();
+					if (activity != null) activity.showCode();
+				});
+
+		return v;
+	}
+
+	private ContactLinkExchangeActivity getCastActivity() {
+		return (ContactLinkExchangeActivity) getActivity();
+	}
+
+	private boolean isInputError() {
+		boolean briarLink = isBriarLink(linkInput.getText());
+		if (!briarLink) {
+			linkInputLayout.setError(getString(R.string.invalid_link));
+			linkInput.requestFocus();
+			return true;
+		} else linkInputLayout.setError(null);
+		String link = getLink();
+		boolean isOurLink = link != null && OUR_LINK.equals("briar://" + link);
+		if (isOurLink) {
+			linkInputLayout.setError(getString(R.string.own_link_error));
+			linkInput.requestFocus();
+			return true;
+		} else linkInputLayout.setError(null);
+		return false;
+	}
+
+	private boolean isBriarLink(@Nullable CharSequence s) {
+		ContactLinkExchangeActivity activity = getCastActivity();
+		return activity != null && activity.isBriarLink(s);
+	}
+
+	@Nullable
+	private String getLink() {
+		Matcher matcher = LINK_REGEX.matcher(linkInput.getText());
+		if (matcher.matches()) // needs to be called before groups become available
+			return matcher.group(2);
+		else
+			return null;
+	}
+
+	private void onContinueButtonClicked() {
+		ContactLinkExchangeActivity activity = getCastActivity();
+		if (activity == null || isInputError()) return;
+
+		String linkText = getLink();
+		if (linkText == null) throw new AssertionError();
+
+		BaseFragment f = ContactNicknameFragment.newInstance(linkText);
+		activity.showNextFragment(f);
+	}
+
+}

briar-android/src/main/java/org/briarproject/briar/android/contact/ContactListFragment.java

@@ -2,20 +2,22 @@ package org.briarproject.briar.android.contact;
 
 import android.content.Intent;
 import android.os.Bundle;
+import android.support.design.widget.FloatingActionButton;
+import android.support.design.widget.Snackbar;
 import android.support.v4.app.ActivityCompat;
 import android.support.v4.app.ActivityOptionsCompat;
+import android.support.v4.content.ContextCompat;
 import android.support.v4.util.Pair;
 import android.support.v7.widget.LinearLayoutManager;
 import android.view.LayoutInflater;
-import android.view.Menu;
-import android.view.MenuInflater;
-import android.view.MenuItem;
 import android.view.View;
 import android.view.ViewGroup;
+import android.widget.TextView;
 
 import org.briarproject.bramble.api.contact.Contact;
 import org.briarproject.bramble.api.contact.ContactId;
 import org.briarproject.bramble.api.contact.ContactManager;
+import org.briarproject.bramble.api.contact.event.ContactAddedEvent;
 import org.briarproject.bramble.api.contact.event.ContactRemovedEvent;
 import org.briarproject.bramble.api.contact.event.ContactStatusChangedEvent;
 import org.briarproject.bramble.api.db.DbException;
@@ -40,15 +42,22 @@ import org.briarproject.briar.api.client.MessageTracker.GroupCount;
 import org.briarproject.briar.api.conversation.ConversationManager;
 import org.briarproject.briar.api.conversation.ConversationMessageHeader;
 import org.briarproject.briar.api.conversation.event.ConversationMessageReceivedEvent;
+import org.briarproject.briar.api.messaging.MessagingManager;
+import org.briarproject.briar.api.messaging.MessagingManager.PendingContact;
 
 import java.util.ArrayList;
+import java.util.Collection;
 import java.util.List;
 import java.util.logging.Logger;
 
 import javax.annotation.Nullable;
 import javax.inject.Inject;
 
+import io.github.kobakei.materialfabspeeddial.FabSpeedDial;
+import io.github.kobakei.materialfabspeeddial.FabSpeedDial.OnMenuItemClickListener;
+
 import static android.os.Build.VERSION.SDK_INT;
+import static android.support.design.widget.Snackbar.LENGTH_INDEFINITE;
 import static android.support.v4.app.ActivityOptionsCompat.makeSceneTransitionAnimation;
 import static android.support.v4.view.ViewCompat.getTransitionName;
 import static java.util.logging.Level.WARNING;
@@ -59,7 +68,8 @@ import static org.briarproject.briar.android.conversation.ConversationActivity.C
 
 @MethodsNotNullByDefault
 @ParametersNotNullByDefault
-public class ContactListFragment extends BaseFragment implements EventListener {
+public class ContactListFragment extends BaseFragment implements EventListener,
+		OnMenuItemClickListener {
 
 	public static final String TAG = ContactListFragment.class.getName();
 	private static final Logger LOG = Logger.getLogger(TAG);
@@ -71,8 +81,13 @@ public class ContactListFragment extends BaseFragment implements EventListener {
 	@Inject
 	AndroidNotificationManager notificationManager;
 
+	// TODO remove
+	@Inject
+	MessagingManager messagingManager;
+
 	private ContactListAdapter adapter;
 	private BriarRecyclerView list;
+	private Snackbar snackbar;
 
 	// Fields that are accessed from background threads must be volatile
 	@Inject
@@ -105,7 +120,12 @@ public class ContactListFragment extends BaseFragment implements EventListener {
 
 		getActivity().setTitle(R.string.contact_list_button);
 
-		View contentView = inflater.inflate(R.layout.list, container, false);
+		View contentView =
+				inflater.inflate(R.layout.fragment_contact_list, container,
+						false);
+
+		FabSpeedDial speedDialView = contentView.findViewById(R.id.speedDial);
+		speedDialView.addOnMenuItemClickListener(this);
 
 		OnContactClickListener<ContactListItem> onContactClickListener =
 				(view, item) -> {
@@ -144,26 +164,32 @@ public class ContactListFragment extends BaseFragment implements EventListener {
 		list.setEmptyText(getString(R.string.no_contacts));
 		list.setEmptyAction(getString(R.string.no_contacts_action));
 
+		snackbar = Snackbar.make(contentView,
+				R.string.pending_contact_requests_snackbar, LENGTH_INDEFINITE);
+		snackbar.getView().setBackgroundResource(R.color.briar_primary);
+		snackbar.setAction(R.string.show, v -> startActivity(
+				new Intent(getContext(), PendingRequestsActivity.class)));
+		snackbar.setActionTextColor(ContextCompat
+				.getColor(getContext(), R.color.briar_button_text_positive));
+
 		return contentView;
 	}
 
 	@Override
-	public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
-		inflater.inflate(R.menu.contact_list_actions, menu);
-		super.onCreateOptionsMenu(menu, inflater);
-	}
-
-	@Override
-	public boolean onOptionsItemSelected(MenuItem item) {
-		// Handle presses on the action bar items
-		switch (item.getItemId()) {
-			case R.id.action_add_contact:
+	public void onMenuItemClick(FloatingActionButton fab, @Nullable TextView v,
+			int itemId) {
+		switch (itemId) {
+			case R.id.action_add_contact_nearby:
 				Intent intent =
 						new Intent(getContext(), ContactExchangeActivity.class);
 				startActivity(intent);
-				return true;
+				return;
+			case R.id.action_add_contact_remotely:
+				startActivity(new Intent(getContext(),
+						ContactLinkExchangeActivity.class));
+				return;
 			default:
-				return super.onOptionsItemSelected(item);
+				return;
 		}
 	}
 
@@ -175,6 +201,26 @@ public class ContactListFragment extends BaseFragment implements EventListener {
 		notificationManager.clearAllIntroductionNotifications();
 		loadContacts();
 		list.startPeriodicUpdate();
+
+		// TODO remove
+		checkForPendingContacts();
+	}
+
+	// TODO remove
+	private void checkForPendingContacts() {
+		listener.runOnDbThread(() -> {
+			try {
+				Collection<PendingContact> contacts =
+						messagingManager.getPendingContacts();
+				if (contacts.isEmpty()) {
+					runOnUiThreadUnlessDestroyed(() -> snackbar.dismiss());
+				} else {
+					runOnUiThreadUnlessDestroyed(() -> snackbar.show());
+				}
+			} catch (DbException e) {
+				e.printStackTrace();
+			}
+		});
 	}
 
 	@Override
@@ -250,6 +296,11 @@ public class ContactListFragment extends BaseFragment implements EventListener {
 			ConversationMessageHeader h = p.getMessageHeader();
 			updateItem(p.getContactId(), h);
 		}
+
+		// TODO remove
+		else if (e instanceof ContactAddedEvent) {
+			checkForPendingContacts();
+		}
 	}
 
 	private void updateItem(ContactId c, ConversationMessageHeader h) {

briar-android/src/main/java/org/briarproject/briar/android/contact/ContactNicknameFragment.java

@@ -0,0 +1,120 @@
+package org.briarproject.briar.android.contact;
+
+import android.content.Intent;
+import android.graphics.drawable.Drawable;
+import android.os.Bundle;
+import android.support.annotation.MainThread;
+import android.support.annotation.NonNull;
+import android.support.annotation.UiThread;
+import android.support.design.widget.TextInputEditText;
+import android.support.design.widget.TextInputLayout;
+import android.util.Log;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.Button;
+
+import org.briarproject.briar.R;
+import org.briarproject.briar.android.activity.ActivityComponent;
+import org.briarproject.briar.android.fragment.BaseFragment;
+
+import javax.annotation.Nullable;
+
+import static android.os.Build.VERSION.SDK_INT;
+import static android.support.v4.graphics.drawable.DrawableCompat.setTint;
+import static android.support.v4.graphics.drawable.DrawableCompat.wrap;
+import static java.util.Objects.requireNonNull;
+import static org.briarproject.briar.android.util.UiUtils.resolveColorAttribute;
+
+public class ContactNicknameFragment extends BaseFragment {
+
+	static final String TAG = ContactNicknameFragment.class.getName();
+
+	static BaseFragment newInstance(@Nullable String link) {
+		BaseFragment f = new ContactNicknameFragment();
+		Bundle bundle = new Bundle();
+		bundle.putString("link", link);
+		f.setArguments(bundle);
+		return f;
+	}
+
+	private TextInputLayout contactNameLayout;
+	private TextInputEditText contactNameInput;
+
+	@Nullable
+	private String link;
+
+	@Override
+	public String getUniqueTag() {
+		return TAG;
+	}
+
+	@Override
+	public void injectFragment(ActivityComponent component) {
+		component.inject(this);
+	}
+
+	@Nullable
+	@Override
+	public View onCreateView(@NonNull LayoutInflater inflater,
+			@Nullable ViewGroup container,
+			@Nullable Bundle savedInstanceState) {
+		if (getActivity() == null || getContext() == null) return null;
+
+		getActivity().setTitle(R.string.add_contact_remotely_title_case);
+
+		link = requireNonNull(getArguments()).getString("link");
+		Log.e(TAG, link);
+
+		View v = inflater.inflate(R.layout.fragment_contact_choose_nickname,
+				container, false);
+
+		int color =
+				resolveColorAttribute(getContext(), R.attr.colorControlNormal);
+
+		Button addButton = v.findViewById(R.id.addButton);
+		addButton.setOnClickListener(view -> onAddButtonClicked());
+
+		contactNameLayout = v.findViewById(R.id.contactNameLayout);
+		contactNameInput = v.findViewById(R.id.contactNameInput);
+		if (SDK_INT < 23) {
+			Drawable drawable = wrap(contactNameInput.getCompoundDrawables()[0]);
+			setTint(drawable, color);
+			contactNameInput.setCompoundDrawables(drawable, null, null, null);
+		}
+
+		return v;
+	}
+
+	private ContactLinkExchangeActivity getCastActivity() {
+		return (ContactLinkExchangeActivity) getActivity();
+	}
+
+	@MainThread
+	@UiThread
+	private boolean isInputError() {
+		boolean validContactName = contactNameInput.getText() != null &&
+				contactNameInput.getText().toString().trim().length() > 0;
+		if (!validContactName) {
+			contactNameLayout.setError(getString(R.string.nickname_missing));
+			contactNameInput.requestFocus();
+			return true;
+		} else contactNameLayout.setError(null);
+		return false;
+	}
+
+	private void onAddButtonClicked() {
+		ContactLinkExchangeActivity activity = getCastActivity();
+		if (activity == null || isInputError()) return;
+
+		String name = requireNonNull(contactNameInput.getText()).toString();
+		if (link == null) throw new AssertionError();
+
+		activity.addFakeRequest(name, link);
+
+		Intent intent = new Intent(activity, PendingRequestsActivity.class);
+		startActivity(intent);
+		finish();
+	}
+
+}

briar-android/src/main/java/org/briarproject/briar/android/contact/ContactQrCodeInputFragment.java

@@ -0,0 +1,185 @@
+package org.briarproject.briar.android.contact;
+
+import android.content.DialogInterface;
+import android.os.Bundle;
+import android.support.annotation.NonNull;
+import android.support.v4.app.ActivityCompat;
+import android.support.v7.app.AlertDialog;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.Toast;
+
+import com.google.zxing.Result;
+
+import org.briarproject.briar.R;
+import org.briarproject.briar.android.activity.ActivityComponent;
+import org.briarproject.briar.android.fragment.BaseFragment;
+import org.briarproject.briar.android.keyagreement.CameraException;
+import org.briarproject.briar.android.keyagreement.CameraView;
+import org.briarproject.briar.android.keyagreement.QrCodeDecoder;
+import org.briarproject.briar.android.util.UiUtils;
+
+import java.util.logging.Logger;
+
+import javax.annotation.Nullable;
+
+import static android.Manifest.permission.CAMERA;
+import static android.content.pm.ActivityInfo.SCREEN_ORIENTATION_NOSENSOR;
+import static android.content.pm.PackageManager.PERMISSION_GRANTED;
+import static android.widget.Toast.LENGTH_LONG;
+import static android.widget.Toast.LENGTH_SHORT;
+import static java.util.logging.Level.WARNING;
+import static org.briarproject.bramble.util.LogUtils.logException;
+import static org.briarproject.briar.android.activity.RequestCodes.REQUEST_PERMISSION_CAMERA_LOCATION;
+
+public class ContactQrCodeInputFragment extends BaseFragment
+		implements QrCodeDecoder.ResultCallback {
+
+	static final String TAG = ContactQrCodeInputFragment.class.getName();
+
+	private static final Logger LOG = Logger.getLogger(TAG);
+
+	private CameraView cameraView;
+
+	@Override
+	public String getUniqueTag() {
+		return TAG;
+	}
+
+	@Override
+	public void injectFragment(ActivityComponent component) {
+		component.inject(this);
+	}
+
+	@Override
+	public void onActivityCreated(@Nullable Bundle savedInstanceState) {
+		if (getActivity() == null) throw new AssertionError();
+		super.onActivityCreated(savedInstanceState);
+		getActivity().setRequestedOrientation(SCREEN_ORIENTATION_NOSENSOR);
+		cameraView.setPreviewConsumer(new QrCodeDecoder(this));
+	}
+
+	@Nullable
+	@Override
+	public View onCreateView(@NonNull LayoutInflater inflater,
+			@Nullable ViewGroup container,
+			@Nullable Bundle savedInstanceState) {
+		if (getActivity() == null) return null;
+
+		getActivity().setTitle(R.string.scan_qr_code_title);
+
+		View v = inflater.inflate(R.layout.fragment_contact_qr_code_input,
+				container, false);
+
+		cameraView = v.findViewById(R.id.camera_view);
+
+		return v;
+	}
+
+	@Override
+	public void onStart() {
+		super.onStart();
+		if (checkPermissions()) {
+			startCamera();
+		}
+	}
+
+	@Override
+	public void onStop() {
+		super.onStop();
+		try {
+			cameraView.stop();
+		} catch (CameraException e) {
+			logException(LOG, WARNING, e);
+		}
+	}
+
+	private void startCamera() {
+		try {
+			cameraView.start();
+		} catch (CameraException e) {
+			logException(LOG, WARNING, e);
+			Toast.makeText(getContext(), R.string.camera_error_toast,
+					LENGTH_SHORT).show();
+		}
+	}
+
+	private boolean checkPermissions() {
+		if (getContext() == null) return false;
+		if (ActivityCompat.checkSelfPermission(getContext(), CAMERA) !=
+				PERMISSION_GRANTED) {
+			// Should we show an explanation?
+			if (shouldShowRequestPermissionRationale(CAMERA)) {
+				DialogInterface.OnClickListener continueListener =
+						(dialog, which) -> requestPermission();
+				AlertDialog.Builder
+						builder = new AlertDialog.Builder(getContext(),
+						R.style.BriarDialogTheme);
+				builder.setTitle(R.string.permission_camera_title);
+				builder.setMessage(R.string.permission_camera_request_body);
+				builder.setNeutralButton(R.string.continue_button,
+						continueListener);
+				builder.show();
+			} else {
+				requestPermission();
+			}
+			return false;
+		} else {
+			return true;
+		}
+	}
+
+	@Override
+	public void onRequestPermissionsResult(int requestCode,
+			@NonNull String[] permissions, @NonNull int[] grantResults) {
+		if (getContext() == null) return;
+		if (requestCode == REQUEST_PERMISSION_CAMERA_LOCATION) {
+			// If request is cancelled, the result arrays are empty.
+			if (grantResults.length > 0 &&
+					grantResults[0] == PERMISSION_GRANTED) {
+				startCamera();
+			} else {
+				if (!shouldShowRequestPermissionRationale(CAMERA)) {
+					// The user has permanently denied the request
+					AlertDialog.Builder
+							builder = new AlertDialog.Builder(getContext(),
+							R.style.BriarDialogTheme);
+					builder.setTitle(R.string.permission_camera_title);
+					builder.setMessage(R.string.permission_camera_denied_body);
+					builder.setPositiveButton(R.string.ok,
+							UiUtils.getGoToSettingsListener(getContext()));
+					builder.setNegativeButton(R.string.cancel,
+							(dialog, which) -> cancel());
+					builder.show();
+				} else {
+					Toast.makeText(getContext(),
+							R.string.permission_camera_denied_body,
+							LENGTH_LONG).show();
+					cancel();
+				}
+			}
+		}
+	}
+
+	private void requestPermission() {
+		requestPermissions(new String[] {CAMERA}, REQUEST_PERMISSION_CAMERA_LOCATION);
+	}
+
+	@Nullable
+	private ContactLinkExchangeActivity getCastActivity() {
+		return (ContactLinkExchangeActivity) getActivity();
+	}
+
+	private void cancel() {
+		ContactLinkExchangeActivity activity = getCastActivity();
+		if (activity != null) activity.linkScanned(null);
+	}
+
+	@Override
+	public void handleResult(@NonNull Result result) {
+		LOG.info("Scanned link: " + result.getText());
+		ContactLinkExchangeActivity activity = getCastActivity();
+		if (activity != null) activity.linkScanned(result.getText());
+	}
+}

briar-android/src/main/java/org/briarproject/briar/android/contact/ContactQrCodeOutputFragment.java

@@ -0,0 +1,54 @@
+package org.briarproject.briar.android.contact;
+
+import android.graphics.Bitmap;
+import android.os.Bundle;
+import android.support.annotation.NonNull;
+import android.util.DisplayMetrics;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+
+import org.briarproject.briar.R;
+import org.briarproject.briar.android.activity.ActivityComponent;
+import org.briarproject.briar.android.fragment.BaseFragment;
+import org.briarproject.briar.android.view.QrCodeView;
+
+import javax.annotation.Nullable;
+
+import static org.briarproject.briar.android.contact.ContactLinkExchangeActivity.OUR_LINK;
+import static org.briarproject.briar.android.keyagreement.QrCodeUtils.createQrCode;
+
+public class ContactQrCodeOutputFragment extends BaseFragment {
+
+	static final String TAG = ContactQrCodeOutputFragment.class.getName();
+
+	@Override
+	public String getUniqueTag() {
+		return TAG;
+	}
+
+	@Override
+	public void injectFragment(ActivityComponent component) {
+		component.inject(this);
+	}
+
+	@Nullable
+	@Override
+	public View onCreateView(@NonNull LayoutInflater inflater,
+			@Nullable ViewGroup container,
+			@Nullable Bundle savedInstanceState) {
+		if (getActivity() == null) return null;
+
+		getActivity().setTitle(R.string.show_qr_code_title);
+
+		View v = inflater.inflate(R.layout.fragment_contact_qr_code_output,
+				container, false);
+
+		DisplayMetrics dm = getResources().getDisplayMetrics();
+		Bitmap qrCode = createQrCode(dm, OUR_LINK);
+		QrCodeView qrCodeView = v.findViewById(R.id.qrCodeView);
+		qrCodeView.setQrCode(qrCode);
+
+		return v;
+	}
+}

briar-android/src/main/java/org/briarproject/briar/android/contact/PendingRequestsActivity.java

@@ -0,0 +1,127 @@
+package org.briarproject.briar.android.contact;
+
+import android.os.Bundle;
+import android.support.v7.app.ActionBar;
+import android.support.v7.widget.LinearLayoutManager;
+import android.view.MenuItem;
+
+import org.briarproject.bramble.api.contact.Contact;
+import org.briarproject.bramble.api.contact.ContactManager;
+import org.briarproject.bramble.api.contact.event.ContactAddedEvent;
+import org.briarproject.bramble.api.db.DbException;
+import org.briarproject.bramble.api.event.Event;
+import org.briarproject.bramble.api.event.EventBus;
+import org.briarproject.bramble.api.event.EventListener;
+import org.briarproject.briar.R;
+import org.briarproject.briar.android.activity.ActivityComponent;
+import org.briarproject.briar.android.activity.BriarActivity;
+import org.briarproject.briar.android.view.BriarRecyclerView;
+import org.briarproject.briar.api.messaging.MessagingManager;
+import org.briarproject.briar.api.messaging.MessagingManager.PendingContact;
+
+import java.util.Collection;
+
+import javax.annotation.Nullable;
+import javax.inject.Inject;
+
+import static java.util.concurrent.TimeUnit.SECONDS;
+
+public class PendingRequestsActivity extends BriarActivity
+		implements EventListener {
+
+	@Inject
+	MessagingManager messagingManager;
+	@Inject
+	ContactManager contactManager;
+	@Inject
+	EventBus eventBus;
+
+	private PendingRequestsAdapter adapter;
+	private BriarRecyclerView list;
+
+	@Override
+	public void injectActivity(ActivityComponent component) {
+		component.inject(this);
+	}
+
+	@Override
+	public void onCreate(@Nullable Bundle state) {
+		super.onCreate(state);
+
+		setContentView(R.layout.list);
+
+		ActionBar ab = getSupportActionBar();
+		if (ab != null) {
+			ab.setDisplayHomeAsUpEnabled(true);
+		}
+
+		adapter = new PendingRequestsAdapter(this, PendingContact.class);
+		list = findViewById(R.id.list);
+		list.setLayoutManager(new LinearLayoutManager(this));
+		list.setAdapter(adapter);
+		list.setPERIODIC_UPDATE_MILLIS(SECONDS.toMillis(9));
+	}
+
+	@Override
+	public void onStart() {
+		super.onStart();
+		eventBus.addListener(this);
+		list.startPeriodicUpdate();
+		runOnDbThread(() -> {
+			try {
+				Collection<PendingContact> contacts =
+						messagingManager.getPendingContacts();
+				addPendingContacts(contacts);
+			} catch (DbException e) {
+				e.printStackTrace();
+			}
+		});
+	}
+
+	@Override
+	protected void onStop() {
+		super.onStop();
+		list.stopPeriodicUpdate();
+		adapter.clear();
+	}
+
+	@Override
+	public boolean onOptionsItemSelected(MenuItem item) {
+		switch (item.getItemId()) {
+			case android.R.id.home:
+				onBackPressed();
+				return true;
+			default:
+				return super.onOptionsItemSelected(item);
+		}
+	}
+
+	@Override
+	public void eventOccurred(Event e) {
+		if (e instanceof ContactAddedEvent) {
+			runOnDbThread(() -> {
+				try {
+					Contact contact = contactManager
+							.getContact(((ContactAddedEvent) e).getContactId());
+					runOnUiThreadUnlessDestroyed(() -> {
+						adapter.remove(contact);
+						if (adapter.isEmpty()) finish();
+					});
+				} catch (DbException e1) {
+					e1.printStackTrace();
+				}
+			});
+		}
+	}
+
+	private void addPendingContacts(Collection<PendingContact> contacts) {
+		runOnUiThreadUnlessDestroyed(() -> {
+			if (contacts.isEmpty()) {
+				list.showData();
+			} else {
+				adapter.addAll(contacts);
+			}
+		});
+	}
+
+}

briar-android/src/main/java/org/briarproject/briar/android/contact/PendingRequestsAdapter.java

@@ -0,0 +1,67 @@
+package org.briarproject.briar.android.contact;
+
+import android.content.Context;
+import android.support.annotation.NonNull;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+
+import org.briarproject.bramble.api.contact.Contact;
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
+import org.briarproject.briar.R;
+import org.briarproject.briar.android.util.BriarAdapter;
+import org.briarproject.briar.api.messaging.MessagingManager.PendingContact;
+
+@NotNullByDefault
+public class PendingRequestsAdapter extends
+		BriarAdapter<PendingContact, PendingRequestsViewHolder> {
+
+	public PendingRequestsAdapter(Context ctx, Class<PendingContact> c) {
+		super(ctx, c);
+	}
+
+	@NonNull
+	@Override
+	public PendingRequestsViewHolder onCreateViewHolder(
+			ViewGroup viewGroup, int i) {
+		View v = LayoutInflater.from(viewGroup.getContext()).inflate(
+				R.layout.list_item_pending_contact, viewGroup, false);
+		return new PendingRequestsViewHolder(v);
+	}
+
+	@Override
+	public void onBindViewHolder(
+			PendingRequestsViewHolder pendingRequestsViewHolder, int i) {
+		pendingRequestsViewHolder.bind(items.get(i));
+	}
+
+	@Override
+	public int compare(PendingContact item1, PendingContact item2) {
+		return (int) (item1.getTimestamp() - item2.getTimestamp());
+	}
+
+	@Override
+	public boolean areContentsTheSame(PendingContact item1,
+			PendingContact item2) {
+		return item1.getName().equals(item2.getName()) &&
+				item1.getTimestamp() == item2.getTimestamp();
+	}
+
+	@Override
+	public boolean areItemsTheSame(PendingContact item1,
+			PendingContact item2) {
+		return item1.getName().equals(item2.getName()) &&
+				item1.getTimestamp() == item2.getTimestamp();
+	}
+
+	// TODO remove
+	public void remove(Contact contact) {
+		for (int i = 0; i < items.size(); i++) {
+			if (items.get(i).getName().equals(contact.getAuthor().getName())) {
+				items.removeItemAt(i);
+				return;
+			}
+		}
+	}
+
+}

briar-android/src/main/java/org/briarproject/briar/android/contact/PendingRequestsViewHolder.java

@@ -0,0 +1,55 @@
+package org.briarproject.briar.android.contact;
+
+import android.support.v4.content.ContextCompat;
+import android.support.v7.widget.RecyclerView.ViewHolder;
+import android.util.Log;
+import android.view.View;
+import android.widget.TextView;
+
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
+import org.briarproject.briar.R;
+import org.briarproject.briar.android.view.TextAvatarView;
+import org.briarproject.briar.api.messaging.MessagingManager.PendingContact;
+
+import static java.util.concurrent.TimeUnit.SECONDS;
+import static org.briarproject.bramble.util.StringUtils.toUtf8;
+import static org.briarproject.briar.android.util.UiUtils.formatDate;
+
+@NotNullByDefault
+public class PendingRequestsViewHolder extends ViewHolder {
+
+	private final TextAvatarView avatar;
+	private final TextView name;
+	private final TextView time;
+	private final TextView status;
+
+	public PendingRequestsViewHolder(View v) {
+		super(v);
+		avatar = v.findViewById(R.id.avatar);
+		name = v.findViewById(R.id.name);
+		time = v.findViewById(R.id.time);
+		status = v.findViewById(R.id.status);
+	}
+
+	public void bind(PendingContact item) {
+		avatar.setText(item.getName());
+		avatar.setBackgroundBytes(toUtf8(item.getName() + item.getTimestamp()));
+		name.setText(item.getName());
+		time.setText(formatDate(time.getContext(), item.getTimestamp()));
+		long diff = item.getAddAt() - System.currentTimeMillis();
+		Log.e("TEST", "diff: " + diff);
+		int color = ContextCompat
+				.getColor(status.getContext(), R.color.briar_green);
+		if (diff < SECONDS.toMillis(10)) {
+			status.setText(R.string.adding_contact);
+		} else if (diff < SECONDS.toMillis(20)) {
+			status.setText(R.string.connecting);
+		} else if (diff < SECONDS.toMillis(30)) {
+			status.setText(R.string.waiting_for_contact_to_come_online);
+			color = ContextCompat
+					.getColor(status.getContext(), R.color.briar_yellow);
+		}
+		status.setTextColor(color);
+	}
+
+}

briar-android/src/main/java/org/briarproject/briar/android/conversation/AttachmentController.java

@@ -4,6 +4,7 @@ import android.content.res.Resources;
 import android.graphics.BitmapFactory;
 import android.support.annotation.Nullable;
 import android.support.media.ExifInterface;
+import android.webkit.MimeTypeMap;
 
 import org.briarproject.bramble.api.Pair;
 import org.briarproject.bramble.api.db.DatabaseExecutor;
@@ -127,12 +128,20 @@ class AttachmentController {
 		}
 
 		// calculate thumbnail size
-		Size thumbnailSize = new Size(defaultSize, defaultSize);
+		Size thumbnailSize = new Size(defaultSize, defaultSize, size.mimeType);
 		if (!size.error) {
-			thumbnailSize = getThumbnailSize(size.width, size.height);
+			thumbnailSize =
+					getThumbnailSize(size.width, size.height, size.mimeType);
+		}
+		// get file extension
+		MimeTypeMap mimeTypeMap = MimeTypeMap.getSingleton();
+		String extension = mimeTypeMap.getExtensionFromMimeType(size.mimeType);
+		if (extension == null) {
+			return new AttachmentItem(messageId, 0, 0, "", "", 0, 0, true);
 		}
 		return new AttachmentItem(messageId, size.width, size.height,
-				thumbnailSize.width, thumbnailSize.height, size.error);
+				size.mimeType, extension, thumbnailSize.width, thumbnailSize.height,
+				size.error);
 	}
 
 	/**
@@ -151,9 +160,9 @@ class AttachmentController {
 				orientation == ORIENTATION_TRANSVERSE ||
 				orientation == ORIENTATION_TRANSPOSE) {
 			//noinspection SuspiciousNameCombination
-			return new Size(height, width);
+			return new Size(height, width, "image/jpeg");
 		}
-		return new Size(width, height);
+		return new Size(width, height, "image/jpeg");
 	}
 
 	/**
@@ -165,10 +174,11 @@ class AttachmentController {
 		BitmapFactory.decodeStream(is, null, options);
 		if (options.outWidth < 1 || options.outHeight < 1)
 			return new Size();
-		return new Size(options.outWidth, options.outHeight);
+		return new Size(options.outWidth, options.outHeight,
+				options.outMimeType);
 	}
 
-	private Size getThumbnailSize(int width, int height) {
+	private Size getThumbnailSize(int width, int height, String mimeType) {
 		float widthPercentage = maxWidth / (float) width;
 		float heightPercentage = maxHeight / (float) height;
 		float scaleFactor = Math.min(widthPercentage, heightPercentage);
@@ -184,24 +194,27 @@ class AttachmentController {
 			if (thumbnailWidth > maxWidth) thumbnailWidth = maxWidth;
 			if (thumbnailHeight > maxHeight) thumbnailHeight = maxHeight;
 		}
-		return new Size(thumbnailWidth, thumbnailHeight);
+		return new Size(thumbnailWidth, thumbnailHeight, mimeType);
 	}
 
 	private static class Size {
 
 		private final int width;
 		private final int height;
+		private final String mimeType;
 		private final boolean error;
 
-		private Size(int width, int height) {
+		private Size(int width, int height, String mimeType) {
 			this.width = width;
 			this.height = height;
+			this.mimeType = mimeType;
 			this.error = false;
 		}
 
 		private Size() {
 			this.width = 0;
 			this.height = 0;
+			this.mimeType = "";
 			this.error = true;
 		}
 	}

briar-android/src/main/java/org/briarproject/briar/android/conversation/AttachmentItem.java

@@ -14,6 +14,7 @@ public class AttachmentItem implements Parcelable {
 
 	private final MessageId messageId;
 	private final int width, height;
+	private final String mimeType, extension;
 	private final int thumbnailWidth, thumbnailHeight;
 	private final boolean hasError;
 
@@ -30,11 +31,14 @@ public class AttachmentItem implements Parcelable {
 				}
 			};
 
-	AttachmentItem(MessageId messageId, int width, int height,
-			int thumbnailWidth, int thumbnailHeight, boolean hasError) {
+	AttachmentItem(MessageId messageId, int width, int height, String mimeType,
+			String extension, int thumbnailWidth, int thumbnailHeight,
+			boolean hasError) {
 		this.messageId = messageId;
 		this.width = width;
 		this.height = height;
+		this.mimeType = mimeType;
+		this.extension = extension;
 		this.thumbnailWidth = thumbnailWidth;
 		this.thumbnailHeight = thumbnailHeight;
 		this.hasError = hasError;
@@ -46,6 +50,8 @@ public class AttachmentItem implements Parcelable {
 		messageId = new MessageId(messageIdByte);
 		width = in.readInt();
 		height = in.readInt();
+		mimeType = in.readString();
+		extension = in.readString();
 		thumbnailWidth = in.readInt();
 		thumbnailHeight = in.readInt();
 		hasError = in.readByte() != 0;
@@ -63,6 +69,14 @@ public class AttachmentItem implements Parcelable {
 		return height;
 	}
 
+	String getMimeType() {
+		return mimeType;
+	}
+
+	String getExtension() {
+		return extension;
+	}
+
 	int getThumbnailWidth() {
 		return thumbnailWidth;
 	}
@@ -90,6 +104,8 @@ public class AttachmentItem implements Parcelable {
 		dest.writeByteArray(messageId.getBytes());
 		dest.writeInt(width);
 		dest.writeInt(height);
+		dest.writeString(mimeType);
+		dest.writeString(extension);
 		dest.writeInt(thumbnailWidth);
 		dest.writeInt(thumbnailHeight);
 		dest.writeByte((byte) (hasError ? 1 : 0));

briar-android/src/main/java/org/briarproject/briar/android/conversation/ConversationActivity.java

@@ -1,10 +1,12 @@
 package org.briarproject.briar.android.conversation;
 
+import android.annotation.SuppressLint;
 import android.arch.lifecycle.Observer;
 import android.arch.lifecycle.ViewModelProvider;
 import android.arch.lifecycle.ViewModelProviders;
 import android.content.DialogInterface;
 import android.content.Intent;
+import android.net.Uri;
 import android.os.Bundle;
 import android.support.annotation.Nullable;
 import android.support.annotation.UiThread;
@@ -51,7 +53,6 @@ import org.briarproject.bramble.api.sync.Message;
 import org.briarproject.bramble.api.sync.MessageId;
 import org.briarproject.bramble.api.sync.event.MessagesAckedEvent;
 import org.briarproject.bramble.api.sync.event.MessagesSentEvent;
-import org.briarproject.bramble.util.StringUtils;
 import org.briarproject.briar.R;
 import org.briarproject.briar.android.activity.ActivityComponent;
 import org.briarproject.briar.android.activity.BriarActivity;
@@ -62,8 +63,12 @@ import org.briarproject.briar.android.forum.ForumActivity;
 import org.briarproject.briar.android.introduction.IntroductionActivity;
 import org.briarproject.briar.android.privategroup.conversation.GroupActivity;
 import org.briarproject.briar.android.view.BriarRecyclerView;
+import org.briarproject.briar.android.view.ImagePreview;
+import org.briarproject.briar.android.view.TextAttachmentController;
+import org.briarproject.briar.android.view.TextAttachmentController.AttachImageListener;
 import org.briarproject.briar.android.view.TextInputView;
-import org.briarproject.briar.android.view.TextInputView.TextInputListener;
+import org.briarproject.briar.android.view.TextSendController;
+import org.briarproject.briar.android.view.TextSendController.SendListener;
 import org.briarproject.briar.api.android.AndroidNotificationManager;
 import org.briarproject.briar.api.blog.BlogSharingManager;
 import org.briarproject.briar.api.client.ProtocolStateException;
@@ -104,7 +109,8 @@ import static android.os.Build.VERSION.SDK_INT;
 import static android.support.v4.app.ActivityOptionsCompat.makeSceneTransitionAnimation;
 import static android.support.v4.view.ViewCompat.setTransitionName;
 import static android.support.v7.util.SortedList.INVALID_POSITION;
-import static android.view.Gravity.END;
+import static android.view.Gravity.RIGHT;
+import static android.widget.Toast.LENGTH_LONG;
 import static android.widget.Toast.LENGTH_SHORT;
 import static java.util.Collections.emptyList;
 import static java.util.Collections.sort;
@@ -114,6 +120,9 @@ import static java.util.logging.Level.WARNING;
 import static org.briarproject.bramble.util.LogUtils.logDuration;
 import static org.briarproject.bramble.util.LogUtils.logException;
 import static org.briarproject.bramble.util.LogUtils.now;
+import static org.briarproject.bramble.util.StringUtils.isNullOrEmpty;
+import static org.briarproject.briar.android.TestingConstants.FEATURE_FLAG_IMAGE_ATTACHMENTS;
+import static org.briarproject.briar.android.activity.RequestCodes.REQUEST_ATTACH_IMAGE;
 import static org.briarproject.briar.android.activity.RequestCodes.REQUEST_INTRODUCTION;
 import static org.briarproject.briar.android.conversation.ImageActivity.ATTACHMENT;
 import static org.briarproject.briar.android.conversation.ImageActivity.DATE;
@@ -129,8 +138,8 @@ import static uk.co.samuelwall.materialtaptargetprompt.MaterialTapTargetPrompt.S
 @MethodsNotNullByDefault
 @ParametersNotNullByDefault
 public class ConversationActivity extends BriarActivity
-		implements EventListener, ConversationListener, TextInputListener,
-		TextCache, AttachmentCache {
+		implements EventListener, ConversationListener, SendListener,
+		TextCache, AttachmentCache, AttachImageListener {
 
 	public static final String CONTACT_ID = "briar.CONTACT_ID";
 
@@ -160,6 +169,7 @@ public class ConversationActivity extends BriarActivity
 	private BriarRecyclerView list;
 	private LinearLayoutManager layoutManager;
 	private TextInputView textInputView;
+	private TextSendController sendController;
 
 	// Fields that are accessed from background threads must be volatile
 	@Inject
@@ -197,7 +207,9 @@ public class ConversationActivity extends BriarActivity
 	@Override
 	public void onCreate(@Nullable Bundle state) {
 		if (SDK_INT >= 21) {
-			Transition slide = new Slide(END);
+			// Spurious lint warning - using END causes a crash
+			@SuppressLint("RtlHardcoded")
+			Transition slide = new Slide(RIGHT);
 			setSceneTransitionAnimation(slide, null, slide);
 		}
 		super.onCreate(state);
@@ -247,7 +259,16 @@ public class ConversationActivity extends BriarActivity
 		list.setEmptyText(getString(R.string.no_private_messages));
 
 		textInputView = findViewById(R.id.text_input_container);
-		textInputView.setListener(this);
+		if (FEATURE_FLAG_IMAGE_ATTACHMENTS) {
+			ImagePreview imagePreview = findViewById(R.id.imagePreview);
+			sendController = new TextAttachmentController(textInputView,
+					imagePreview, this, this);
+		} else {
+			sendController = new TextSendController(textInputView, this, false);
+		}
+		textInputView.setSendController(sendController);
+		textInputView.setMaxTextLength(MAX_PRIVATE_MESSAGE_TEXT_LENGTH);
+		textInputView.setEnabled(false);
 	}
 
 	@Override
@@ -264,6 +285,9 @@ public class ConversationActivity extends BriarActivity
 					Snackbar.LENGTH_SHORT);
 			snackbar.getView().setBackgroundResource(R.color.briar_primary);
 			snackbar.show();
+		} else if (request == REQUEST_ATTACH_IMAGE && result == RESULT_OK) {
+			// remove cast when removing FEATURE_FLAG_IMAGE_ATTACHMENTS
+			((TextAttachmentController) sendController).onImageReceived(data);
 		}
 	}
 
@@ -402,7 +426,7 @@ public class ConversationActivity extends BriarActivity
 		runOnUiThreadUnlessDestroyed(() -> {
 			if (revision == adapter.getRevision()) {
 				adapter.incrementRevision();
-				textInputView.setSendButtonEnabled(true);
+				textInputView.setEnabled(true);
 				List<ConversationItem> items = createItems(headers);
 				adapter.addAll(items);
 				list.showData();
@@ -570,14 +594,23 @@ public class ConversationActivity extends BriarActivity
 	}
 
 	@Override
-	public void onSendClick(String text) {
-		if (text.isEmpty()) return;
-		text = StringUtils.truncateUtf8(text, MAX_PRIVATE_MESSAGE_TEXT_LENGTH);
+	public void onAttachImage(Intent intent) {
+		startActivityForResult(intent, REQUEST_ATTACH_IMAGE);
+	}
+
+	@Override
+	public void onSendClick(@Nullable String text, List<Uri> imageUris) {
+		if (!imageUris.isEmpty()) {
+			Toast.makeText(this, "Not yet implemented.", LENGTH_LONG).show();
+			textInputView.clearText();
+			return;
+		}
+		if (isNullOrEmpty(text)) throw new AssertionError();
 		long timestamp = System.currentTimeMillis();
 		timestamp = Math.max(timestamp, getMinTimestampForNewMessage());
 		if (messagingGroupId == null) loadGroupId(text, timestamp);
 		else createMessage(text, timestamp);
-		textInputView.setText("");
+		textInputView.clearText();
 	}
 
 	private long getMinTimestampForNewMessage() {

briar-android/src/main/java/org/briarproject/briar/android/conversation/ImageActivity.java

@@ -1,14 +1,23 @@
 package org.briarproject.briar.android.conversation;
 
+import android.arch.lifecycle.ViewModelProvider;
+import android.arch.lifecycle.ViewModelProviders;
+import android.content.DialogInterface.OnClickListener;
+import android.content.Intent;
 import android.graphics.drawable.Animatable;
 import android.graphics.drawable.Drawable;
 import android.os.Bundle;
 import android.support.annotation.Nullable;
 import android.support.annotation.RequiresApi;
 import android.support.design.widget.AppBarLayout;
+import android.support.design.widget.Snackbar;
+import android.support.v4.content.ContextCompat;
+import android.support.v4.graphics.drawable.DrawableCompat;
+import android.support.v7.app.AlertDialog.Builder;
 import android.support.v7.widget.Toolbar;
 import android.transition.Fade;
 import android.transition.Transition;
+import android.view.Menu;
 import android.view.MenuItem;
 import android.view.View;
 import android.view.Window;
@@ -26,8 +35,18 @@ import org.briarproject.briar.android.activity.BriarActivity;
 import org.briarproject.briar.android.conversation.glide.GlideApp;
 import org.briarproject.briar.android.view.PullDownLayout;
 
+import java.text.SimpleDateFormat;
+import java.util.Date;
+import java.util.Locale;
+
+import javax.inject.Inject;
+
+import static android.content.Intent.ACTION_CREATE_DOCUMENT;
+import static android.content.Intent.CATEGORY_OPENABLE;
+import static android.content.Intent.EXTRA_TITLE;
 import static android.graphics.Color.TRANSPARENT;
 import static android.os.Build.VERSION.SDK_INT;
+import static android.support.design.widget.Snackbar.LENGTH_LONG;
 import static android.view.View.GONE;
 import static android.view.View.SYSTEM_UI_FLAG_FULLSCREEN;
 import static android.view.View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN;
@@ -37,6 +56,7 @@ import static android.view.WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS;
 import static android.widget.ImageView.ScaleType.FIT_START;
 import static com.bumptech.glide.load.engine.DiskCacheStrategy.NONE;
 import static java.util.Objects.requireNonNull;
+import static org.briarproject.briar.android.activity.RequestCodes.REQUEST_SAVE_ATTACHMENT;
 import static org.briarproject.briar.android.util.UiUtils.formatDateAbsolute;
 
 public class ImageActivity extends BriarActivity
@@ -46,9 +66,14 @@ public class ImageActivity extends BriarActivity
 	final static String NAME = "name";
 	final static String DATE = "date";
 
+	@Inject
+	ViewModelProvider.Factory viewModelFactory;
+
+	private ImageViewModel viewModel;
 	private PullDownLayout layout;
 	private AppBarLayout appBarLayout;
 	private PhotoView photoView;
+	private AttachmentItem attachment;
 
 	@Override
 	public void injectActivity(ActivityComponent component) {
@@ -67,6 +92,11 @@ public class ImageActivity extends BriarActivity
 			setSceneTransitionAnimation(transition, null, transition);
 		}
 
+		// get View Model
+		viewModel = ViewModelProviders.of(this, viewModelFactory)
+				.get(ImageViewModel.class);
+		viewModel.getSaveState().observe(this, this::onImageSaveStateChanged);
+
 		// inflate layout
 		setContentView(R.layout.activity_image);
 		layout = findViewById(R.id.layout);
@@ -88,7 +118,7 @@ public class ImageActivity extends BriarActivity
 		TextView dateView = toolbar.findViewById(R.id.dateView);
 
 		// Intent Extras
-		AttachmentItem attachment = getIntent().getParcelableExtra(ATTACHMENT);
+		attachment = getIntent().getParcelableExtra(ATTACHMENT);
 		String name = getIntent().getStringExtra(NAME);
 		long time = getIntent().getLongExtra(DATE, 0);
 		String date = formatDateAbsolute(this, time);
@@ -143,17 +173,34 @@ public class ImageActivity extends BriarActivity
 				.into(photoView);
 	}
 
+	@Override
+	public boolean onCreateOptionsMenu(Menu menu) {
+		getMenuInflater().inflate(R.menu.image_actions, menu);
+		return super.onCreateOptionsMenu(menu);
+	}
+
 	@Override
 	public boolean onOptionsItemSelected(MenuItem item) {
 		switch (item.getItemId()) {
 			case android.R.id.home:
 				onBackPressed();
 				return true;
+			case R.id.action_save_image:
+				showSaveImageDialog();
+				return true;
 			default:
 				return super.onOptionsItemSelected(item);
 		}
 	}
 
+	@Override
+	protected void onActivityResult(int request, int result, Intent data) {
+		super.onActivityResult(request, result, data);
+		if (request == REQUEST_SAVE_ATTACHMENT && result == RESULT_OK) {
+			viewModel.saveImage(attachment, data.getData());
+		}
+	}
+
 	@Override
 	public void onPullStart() {
 		appBarLayout.animate()
@@ -190,9 +237,8 @@ public class ImageActivity extends BriarActivity
 
 	@RequiresApi(api = 16)
 	private void hideSystemUi(View decorView) {
-		decorView.setSystemUiVisibility(SYSTEM_UI_FLAG_LAYOUT_STABLE
-				| SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
-				| SYSTEM_UI_FLAG_FULLSCREEN
+		decorView.setSystemUiVisibility(SYSTEM_UI_FLAG_FULLSCREEN |
+				SYSTEM_UI_FLAG_LAYOUT_STABLE | SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
 		);
 		appBarLayout.animate()
 				.translationYBy(-1 * appBarLayout.getHeight())
@@ -204,8 +250,7 @@ public class ImageActivity extends BriarActivity
 	@RequiresApi(api = 16)
 	private void showSystemUi(View decorView) {
 		decorView.setSystemUiVisibility(
-				SYSTEM_UI_FLAG_LAYOUT_STABLE
-						| SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
+				SYSTEM_UI_FLAG_LAYOUT_STABLE | SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
 		);
 		appBarLayout.animate()
 				.translationYBy(appBarLayout.getHeight())
@@ -230,4 +275,49 @@ public class ImageActivity extends BriarActivity
 				drawableTop != appBarLayout.getTop();
 	}
 
+	private void showSaveImageDialog() {
+		OnClickListener okListener = (dialog, which) -> {
+			if (SDK_INT >= 19) {
+				Intent intent = getCreationIntent();
+				startActivityForResult(intent, REQUEST_SAVE_ATTACHMENT);
+			} else {
+				viewModel.saveImage(attachment);
+			}
+		};
+		Builder builder = new Builder(this, R.style.BriarDialogTheme);
+		builder.setTitle(getString(R.string.dialog_title_save_image));
+		builder.setMessage(getString(R.string.dialog_message_save_image));
+		Drawable icon = ContextCompat.getDrawable(this, R.drawable.ic_security);
+		DrawableCompat.setTint(requireNonNull(icon),
+				ContextCompat.getColor(this, R.color.color_primary));
+		builder.setIcon(icon);
+		builder.setPositiveButton(R.string.save_image, okListener);
+		builder.setNegativeButton(R.string.cancel, null);
+		builder.show();
+	}
+
+	@RequiresApi(api = 19)
+	private Intent getCreationIntent() {
+		SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss",
+				Locale.getDefault());
+		String fileName = sdf.format(new Date());
+		Intent intent = new Intent(ACTION_CREATE_DOCUMENT);
+		intent.addCategory(CATEGORY_OPENABLE);
+		intent.setType(attachment.getMimeType());
+		intent.putExtra(EXTRA_TITLE, fileName);
+		return intent;
+	}
+
+	private void onImageSaveStateChanged(@Nullable Boolean error) {
+		if (error == null) return;
+		int stringRes = error ?
+				R.string.save_image_error : R.string.save_image_success;
+		int colorRes = error ?
+				R.color.briar_red : R.color.briar_primary;
+		Snackbar s = Snackbar.make(layout, stringRes, LENGTH_LONG);
+		s.getView().setBackgroundResource(colorRes);
+		s.show();
+		viewModel.onSaveStateSeen();
+	}
+
 }

briar-android/src/main/java/org/briarproject/briar/android/conversation/ImageViewModel.java

@@ -0,0 +1,166 @@
+package org.briarproject.briar.android.conversation;
+
+import android.app.Application;
+import android.arch.lifecycle.AndroidViewModel;
+import android.arch.lifecycle.LiveData;
+import android.arch.lifecycle.MutableLiveData;
+import android.net.Uri;
+import android.support.annotation.Nullable;
+import android.support.annotation.UiThread;
+
+import org.briarproject.bramble.api.db.DatabaseExecutor;
+import org.briarproject.bramble.api.db.DbException;
+import org.briarproject.bramble.api.lifecycle.IoExecutor;
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
+import org.briarproject.bramble.api.sync.MessageId;
+import org.briarproject.briar.api.messaging.Attachment;
+import org.briarproject.briar.api.messaging.MessagingManager;
+
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+import java.util.Locale;
+import java.util.concurrent.Executor;
+import java.util.logging.Logger;
+
+import javax.inject.Inject;
+
+import static android.media.MediaScannerConnection.scanFile;
+import static android.os.Environment.DIRECTORY_PICTURES;
+import static android.os.Environment.getExternalStoragePublicDirectory;
+import static java.util.logging.Level.WARNING;
+import static java.util.logging.Logger.getLogger;
+import static org.briarproject.bramble.util.IoUtils.copyAndClose;
+import static org.briarproject.bramble.util.LogUtils.logException;
+
+@NotNullByDefault
+public class ImageViewModel extends AndroidViewModel {
+
+	private static Logger LOG = getLogger(ImageViewModel.class.getName());
+
+	private final MessagingManager messagingManager;
+	@DatabaseExecutor
+	private final Executor dbExecutor;
+	@IoExecutor
+	private final Executor ioExecutor;
+
+	private MutableLiveData<Boolean> saveState = new MutableLiveData<>();
+
+	@Inject
+	public ImageViewModel(Application application,
+			MessagingManager messagingManager,
+			@DatabaseExecutor Executor dbExecutor,
+			@IoExecutor Executor ioExecutor) {
+		super(application);
+		this.messagingManager = messagingManager;
+		this.dbExecutor = dbExecutor;
+		this.ioExecutor = ioExecutor;
+	}
+
+	/**
+	 * A LiveData that is true if the image was saved,
+	 * false if there was an error and null otherwise.
+	 *
+	 * Call {@link #onSaveStateSeen()} after consuming an update.
+	 */
+	LiveData<Boolean> getSaveState() {
+		return saveState;
+	}
+
+	@UiThread
+	void onSaveStateSeen() {
+		saveState.setValue(null);
+	}
+
+	/**
+	 * Saves the attachment to a writeable {@link Uri}.
+	 */
+	@UiThread
+	void saveImage(AttachmentItem attachment, @Nullable Uri uri) {
+		if (uri == null) {
+			saveState.setValue(false);
+		} else {
+			saveImage(attachment, () -> getOutputStream(uri), null);
+		}
+	}
+
+	/**
+	 * Saves the attachment on external storage,
+	 * assuming the permission was granted during install time.
+	 */
+	void saveImage(AttachmentItem attachment) {
+		File file = getImageFile(attachment);
+		saveImage(attachment, () -> getOutputStream(file), () -> scanFile(
+				getApplication(), new String[] {file.toString()}, null, null));
+	}
+
+	private void saveImage(AttachmentItem attachment, OutputStreamProvider osp,
+			@Nullable Runnable afterCopy) {
+		MessageId messageId = attachment.getMessageId();
+		dbExecutor.execute(() -> {
+			try {
+				Attachment a = messagingManager.getAttachment(messageId);
+				copyImageFromDb(a, osp, afterCopy);
+			} catch (DbException e) {
+				logException(LOG, WARNING, e);
+				saveState.postValue(true);
+			}
+		});
+	}
+
+	private void copyImageFromDb(Attachment a, OutputStreamProvider osp,
+			@Nullable Runnable afterCopy) {
+		ioExecutor.execute(() -> {
+			try {
+				InputStream is = a.getStream();
+				OutputStream os = osp.getOutputStream();
+				copyAndClose(is, os);
+				if (afterCopy != null) afterCopy.run();
+				saveState.postValue(false);
+			} catch (IOException e) {
+				logException(LOG, WARNING, e);
+				saveState.postValue(true);
+			}
+		});
+	}
+
+	private String getFileName() {
+		SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss",
+				Locale.getDefault());
+		return sdf.format(new Date());
+	}
+
+	private File getImageFile(AttachmentItem attachment) {
+		File path = getExternalStoragePublicDirectory(DIRECTORY_PICTURES);
+		//noinspection ResultOfMethodCallIgnored
+		path.mkdirs();
+		String fileName = getFileName();
+		String ext = "." + attachment.getExtension();
+		File file = new File(path, fileName + ext);
+		int i = 1;
+		while (file.exists()) {
+			file = new File(path, fileName + " (" + i + ")" + ext);
+		}
+		return file;
+	}
+
+	private OutputStream getOutputStream(File file) throws IOException {
+		return new FileOutputStream(file);
+	}
+
+	private OutputStream getOutputStream(Uri uri) throws IOException {
+		OutputStream os =
+				getApplication().getContentResolver().openOutputStream(uri);
+		if (os == null) throw new IOException();
+		return os;
+	}
+
+	private interface OutputStreamProvider {
+		OutputStream getOutputStream() throws IOException;
+	}
+
+}

briar-android/src/main/java/org/briarproject/briar/android/introduction/IntroductionMessageFragment.java

@@ -1,8 +1,8 @@
 package org.briarproject.briar.android.introduction;
 
 import android.content.Context;
+import android.net.Uri;
 import android.os.Bundle;
-import android.support.annotation.NonNull;
 import android.support.annotation.Nullable;
 import android.support.v7.app.ActionBar;
 import android.view.LayoutInflater;
@@ -17,14 +17,17 @@ import org.briarproject.bramble.api.contact.Contact;
 import org.briarproject.bramble.api.contact.ContactId;
 import org.briarproject.bramble.api.contact.ContactManager;
 import org.briarproject.bramble.api.db.DbException;
-import org.briarproject.bramble.util.StringUtils;
+import org.briarproject.bramble.api.nullsafety.MethodsNotNullByDefault;
+import org.briarproject.bramble.api.nullsafety.ParametersNotNullByDefault;
 import org.briarproject.briar.R;
 import org.briarproject.briar.android.activity.ActivityComponent;
 import org.briarproject.briar.android.fragment.BaseFragment;
 import org.briarproject.briar.android.view.TextInputView;
-import org.briarproject.briar.android.view.TextInputView.TextInputListener;
+import org.briarproject.briar.android.view.TextSendController;
+import org.briarproject.briar.android.view.TextSendController.SendListener;
 import org.briarproject.briar.api.introduction.IntroductionManager;
 
+import java.util.List;
 import java.util.logging.Logger;
 
 import javax.inject.Inject;
@@ -41,8 +44,10 @@ import static org.briarproject.bramble.util.LogUtils.logException;
 import static org.briarproject.briar.android.util.UiUtils.getContactDisplayName;
 import static org.briarproject.briar.api.introduction.IntroductionConstants.MAX_INTRODUCTION_TEXT_LENGTH;
 
+@MethodsNotNullByDefault
+@ParametersNotNullByDefault
 public class IntroductionMessageFragment extends BaseFragment
-		implements TextInputListener {
+		implements SendListener {
 
 	public static final String TAG =
 			IntroductionMessageFragment.class.getName();
@@ -84,8 +89,9 @@ public class IntroductionMessageFragment extends BaseFragment
 	}
 
 	@Override
-	public View onCreateView(@NonNull LayoutInflater inflater,
-			ViewGroup container, Bundle savedInstanceState) {
+	public View onCreateView(LayoutInflater inflater,
+			@Nullable ViewGroup container,
+			@Nullable Bundle savedInstanceState) {
 
 		// change toolbar text
 		ActionBar actionBar = introductionActivity.getSupportActionBar();
@@ -97,7 +103,11 @@ public class IntroductionMessageFragment extends BaseFragment
 		View v = inflater.inflate(R.layout.introduction_message, container,
 				false);
 		ui = new ViewHolder(v);
-		ui.message.setSendButtonEnabled(false);
+		TextSendController sendController =
+				new TextSendController(ui.message, this, true);
+		ui.message.setSendController(sendController);
+		ui.message.setMaxTextLength(MAX_INTRODUCTION_TEXT_LENGTH);
+		ui.message.setEnabled(false);
 
 		return v;
 	}
@@ -156,13 +166,10 @@ public class IntroductionMessageFragment extends BaseFragment
 			ui.progressBar.setVisibility(GONE);
 
 			if (possible) {
-				// set button action
-				ui.message.setListener(IntroductionMessageFragment.this);
-
 				// show views
 				ui.notPossible.setVisibility(GONE);
 				ui.message.setVisibility(VISIBLE);
-				ui.message.setSendButtonEnabled(true);
+				ui.message.setEnabled(true);
 				ui.message.showSoftKeyboard();
 			} else {
 				ui.notPossible.setVisibility(VISIBLE);
@@ -184,14 +191,11 @@ public class IntroductionMessageFragment extends BaseFragment
 	}
 
 	@Override
-	public void onSendClick(@NonNull String text) {
+	public void onSendClick(@Nullable String text, List<Uri> imageUris) {
 		// disable button to prevent accidental double invitations
-		ui.message.setSendButtonEnabled(false);
+		ui.message.setEnabled(false);
 
-		String txt = ui.message.getText().toString();
-		if (txt.isEmpty()) txt = null;
-		else txt = StringUtils.truncateUtf8(txt, MAX_INTRODUCTION_TEXT_LENGTH);
-		makeIntroduction(contact1, contact2, txt);
+		makeIntroduction(contact1, contact2, text);
 
 		// don't wait for the introduction to be made before finishing activity
 		introductionActivity.hideSoftKeyboard(ui.message);

briar-android/src/main/java/org/briarproject/briar/android/keyagreement/CameraException.java

@@ -2,7 +2,7 @@ package org.briarproject.briar.android.keyagreement;
 
 import java.io.IOException;
 
-class CameraException extends IOException {
+public class CameraException extends IOException {
 
 	CameraException(String message) {
 		super(message);

briar-android/src/main/java/org/briarproject/briar/android/keyagreement/PreviewConsumer.java

@@ -7,7 +7,7 @@ import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 
 @SuppressWarnings("deprecation")
 @NotNullByDefault
-interface PreviewConsumer {
+public interface PreviewConsumer {
 
 	@UiThread
 	void start(Camera camera, int cameraIndex);

briar-android/src/main/java/org/briarproject/briar/android/keyagreement/QrCodeDecoder.java

@@ -29,7 +29,7 @@ import static java.util.logging.Level.WARNING;
 @SuppressWarnings("deprecation")
 @MethodsNotNullByDefault
 @ParametersNotNullByDefault
-class QrCodeDecoder implements PreviewConsumer, PreviewCallback {
+public class QrCodeDecoder implements PreviewConsumer, PreviewCallback {
 
 	private static final Logger LOG =
 			Logger.getLogger(QrCodeDecoder.class.getName());
@@ -40,7 +40,7 @@ class QrCodeDecoder implements PreviewConsumer, PreviewCallback {
 	private Camera camera = null;
 	private int cameraIndex = 0;
 
-	QrCodeDecoder(ResultCallback callback) {
+	public QrCodeDecoder(ResultCallback callback) {
 		this.callback = callback;
 	}
 
@@ -141,7 +141,7 @@ class QrCodeDecoder implements PreviewConsumer, PreviewCallback {
 	}
 
 	@NotNullByDefault
-	interface ResultCallback {
+	public interface ResultCallback {
 
 		void handleResult(Result result);
 	}

briar-android/src/main/java/org/briarproject/briar/android/keyagreement/QrCodeUtils.java

@@ -21,13 +21,13 @@ import static java.util.logging.Level.WARNING;
 import static org.briarproject.bramble.util.LogUtils.logException;
 
 @NotNullByDefault
-class QrCodeUtils {
+public class QrCodeUtils {
 
 	private static final Logger LOG =
 			Logger.getLogger(QrCodeUtils.class.getName());
 
 	@Nullable
-	static Bitmap createQrCode(DisplayMetrics dm, String input) {
+	public static Bitmap createQrCode(DisplayMetrics dm, String input) {
 		int smallestDimen = Math.min(dm.widthPixels, dm.heightPixels);
 		try {
 			// Generate QR code

briar-android/src/main/java/org/briarproject/briar/android/navdrawer/NavDrawerActivity.java

@@ -57,7 +57,6 @@ import static android.view.View.VISIBLE;
 import static org.briarproject.bramble.api.lifecycle.LifecycleManager.LifecycleState.RUNNING;
 import static org.briarproject.briar.android.BriarService.EXTRA_STARTUP_FAILED;
 import static org.briarproject.briar.android.activity.RequestCodes.REQUEST_PASSWORD;
-import static org.briarproject.briar.android.navdrawer.NavDrawerController.ExpiryWarning.NO;
 import static org.briarproject.briar.android.navdrawer.NavDrawerController.ExpiryWarning.UPDATE;
 import static org.briarproject.briar.android.util.UiUtils.getDaysUntilExpiry;
 
@@ -156,12 +155,12 @@ public class NavDrawerActivity extends BriarActivity implements
 		super.onStart();
 		updateTransports();
 		lockManager.checkIfLockable();
-		controller.showExpiryWarning(new UiResultHandler<ExpiryWarning>(this) {
-			@Override
-			public void onResultUi(ExpiryWarning expiry) {
-				if (expiry != NO) showExpiryWarning(expiry);
-			}
-		});
+//		controller.showExpiryWarning(new UiResultHandler<ExpiryWarning>(this) {
+//			@Override
+//			public void onResultUi(ExpiryWarning expiry) {
+//				if (expiry != NO) showExpiryWarning(expiry);
+//			}
+//		});
 	}
 
 	@Override

briar-android/src/main/java/org/briarproject/briar/android/privategroup/conversation/GroupActivity.java

@@ -196,7 +196,7 @@ public class GroupActivity extends
 
 	private void setGroupEnabled(boolean enabled) {
 		isDissolved = !enabled;
-		textInput.setSendButtonEnabled(enabled);
+		textInput.setEnabled(enabled);
 		list.getRecyclerView().setAlpha(enabled ? 1f : 0.5f);
 
 		if (!enabled) {

briar-android/src/main/java/org/briarproject/briar/android/privategroup/creation/CreateGroupController.java

@@ -1,5 +1,7 @@
 package org.briarproject.briar.android.privategroup.creation;
 
+import android.support.annotation.Nullable;
+
 import org.briarproject.bramble.api.contact.ContactId;
 import org.briarproject.bramble.api.db.DbException;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
@@ -18,6 +20,7 @@ public interface CreateGroupController
 			ResultExceptionHandler<GroupId, DbException> result);
 
 	void sendInvitation(GroupId g, Collection<ContactId> contacts,
-			String text, ResultExceptionHandler<Void, DbException> result);
+			@Nullable String text,
+			ResultExceptionHandler<Void, DbException> result);
 
 }

briar-android/src/main/java/org/briarproject/briar/android/privategroup/creation/CreateGroupControllerImpl.java

@@ -1,5 +1,7 @@
 package org.briarproject.briar.android.privategroup.creation;
 
+import android.support.annotation.Nullable;
+
 import org.briarproject.bramble.api.contact.Contact;
 import org.briarproject.bramble.api.contact.ContactId;
 import org.briarproject.bramble.api.contact.ContactManager;
@@ -123,7 +125,8 @@ class CreateGroupControllerImpl extends ContactSelectorControllerImpl
 
 	@Override
 	public void sendInvitation(GroupId g, Collection<ContactId> contactIds,
-			String text, ResultExceptionHandler<Void, DbException> handler) {
+			@Nullable String text,
+			ResultExceptionHandler<Void, DbException> handler) {
 		runOnDbThread(() -> {
 			try {
 				LocalAuthor localAuthor = identityManager.getLocalAuthor();
@@ -144,7 +147,7 @@ class CreateGroupControllerImpl extends ContactSelectorControllerImpl
 	}
 
 	private void signInvitations(GroupId g, LocalAuthor localAuthor,
-			Collection<Contact> contacts, String text,
+			Collection<Contact> contacts, @Nullable String text,
 			ResultExceptionHandler<Void, DbException> handler) {
 		cryptoExecutor.execute(() -> {
 			long timestamp = clock.currentTimeMillis();
@@ -160,15 +163,14 @@ class CreateGroupControllerImpl extends ContactSelectorControllerImpl
 	}
 
 	private void sendInvitations(GroupId g,
-			Collection<InvitationContext> contexts, String text,
+			Collection<InvitationContext> contexts, @Nullable String text,
 			ResultExceptionHandler<Void, DbException> handler) {
 		runOnDbThread(() -> {
 			try {
-				String txt = text.isEmpty() ? null : text;
 				for (InvitationContext context : contexts) {
 					try {
 						groupInvitationManager.sendInvitation(g,
-								context.contactId, txt, context.timestamp,
+								context.contactId, text, context.timestamp,
 								context.signature);
 					} catch (NoSuchContactException e) {
 						// Continue

briar-android/src/main/java/org/briarproject/briar/android/privategroup/creation/GroupInviteActivity.java

@@ -55,7 +55,7 @@ public class GroupInviteActivity extends ContactSelectorActivity
 	}
 
 	@Override
-	public boolean onButtonClick(String text) {
+	public void onButtonClick(@Nullable String text) {
 		if (groupId == null)
 			throw new IllegalStateException("GroupId was not initialized");
 		controller.sendInvitation(groupId, contacts, text,
@@ -72,7 +72,6 @@ public class GroupInviteActivity extends ContactSelectorActivity
 						handleDbException(exception);
 					}
 				});
-		return true;
 	}
 
 	@Override

briar-android/src/main/java/org/briarproject/briar/android/reporting/BriarReportPrimer.java

@@ -42,6 +42,7 @@ import static android.content.Context.WIFI_SERVICE;
 import static android.net.ConnectivityManager.TYPE_MOBILE;
 import static android.net.ConnectivityManager.TYPE_WIFI;
 import static android.net.wifi.WifiManager.WIFI_STATE_ENABLED;
+import static org.briarproject.bramble.util.PrivacyUtils.scrubInetAddress;
 import static org.briarproject.bramble.util.PrivacyUtils.scrubMacAddress;
 
 public class BriarReportPrimer implements ReportPrimer {
@@ -192,7 +193,7 @@ public class BriarReportPrimer implements ReportPrimer {
 					int ip3 = (ip >> 16) & 0xFF;
 					int ip4 = (ip >> 24) & 0xFF;
 					String address = ip1 + "." + ip2 + "." + ip3 + "." + ip4;
-					customData.put("Wi-Fi address", address);
+					customData.put("Wi-Fi address", scrubInetAddress(address));
 				}
 			}
 

briar-android/src/main/java/org/briarproject/briar/android/sharing/BaseMessageFragment.java

@@ -1,28 +1,31 @@
 package org.briarproject.briar.android.sharing;
 
 import android.content.Context;
+import android.net.Uri;
 import android.os.Bundle;
+import android.support.annotation.Nullable;
 import android.support.annotation.StringRes;
 import android.support.annotation.UiThread;
-import android.support.design.widget.Snackbar;
 import android.view.LayoutInflater;
 import android.view.MenuItem;
 import android.view.View;
 import android.view.ViewGroup;
 
+import org.briarproject.bramble.api.nullsafety.MethodsNotNullByDefault;
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
+import org.briarproject.bramble.api.nullsafety.ParametersNotNullByDefault;
 import org.briarproject.briar.R;
 import org.briarproject.briar.android.fragment.BaseFragment;
 import org.briarproject.briar.android.view.LargeTextInputView;
-import org.briarproject.briar.android.view.TextInputView.TextInputListener;
+import org.briarproject.briar.android.view.TextSendController;
+import org.briarproject.briar.android.view.TextSendController.SendListener;
 
-import static android.support.design.widget.Snackbar.LENGTH_SHORT;
-import static org.briarproject.bramble.util.StringUtils.truncateUtf8;
-import static org.briarproject.bramble.util.StringUtils.utf8IsTooLong;
-import static org.briarproject.briar.api.sharing.SharingConstants.MAX_INVITATION_TEXT_LENGTH;
+import java.util.List;
 
+@MethodsNotNullByDefault
+@ParametersNotNullByDefault
 public abstract class BaseMessageFragment extends BaseFragment
-		implements TextInputListener {
+		implements SendListener {
 
 	protected LargeTextInputView message;
 	private MessageFragmentListener listener;
@@ -34,16 +37,20 @@ public abstract class BaseMessageFragment extends BaseFragment
 	}
 
 	@Override
-	public View onCreateView(LayoutInflater inflater, ViewGroup container,
-			Bundle savedInstanceState) {
+	public View onCreateView(@Nullable LayoutInflater inflater,
+			@Nullable ViewGroup container,
+			@Nullable Bundle savedInstanceState) {
 
 		// inflate view
 		View v = inflater.inflate(R.layout.fragment_message, container,
 				false);
 		message = v.findViewById(R.id.messageView);
+		TextSendController sendController =
+				new TextSendController(message, this, true);
+		message.setSendController(sendController);
+		message.setMaxTextLength(listener.getMaximumTextLength());
 		message.setButtonText(getString(getButtonText()));
 		message.setHint(getHintText());
-		message.setListener(this);
 
 		return v;
 	}
@@ -76,21 +83,12 @@ public abstract class BaseMessageFragment extends BaseFragment
 	}
 
 	@Override
-	public void onSendClick(String text) {
-		if (utf8IsTooLong(text, listener.getMaximumTextLength())) {
-			Snackbar.make(message, R.string.text_too_long, LENGTH_SHORT).show();
-			return;
-		}
-
+	public void onSendClick(@Nullable String text, List<Uri> imageUris) {
 		// disable button to prevent accidental double actions
-		message.setSendButtonEnabled(false);
+		message.setEnabled(false);
 		message.hideSoftKeyboard();
 
-		text = truncateUtf8(text, MAX_INVITATION_TEXT_LENGTH);
-		if(!listener.onButtonClick(text)) {
-			message.setSendButtonEnabled(true);
-			message.showSoftKeyboard();
-		}
+		listener.onButtonClick(text);
 	}
 
 	@UiThread
@@ -101,8 +99,7 @@ public abstract class BaseMessageFragment extends BaseFragment
 
 		void setTitle(@StringRes int titleRes);
 
-		/** Returns true when the button click has been consumed. */
-		boolean onButtonClick(String text);
+		void onButtonClick(@Nullable String text);
 
 		int getMaximumTextLength();
 

briar-android/src/main/java/org/briarproject/briar/android/sharing/ShareActivity.java

@@ -41,13 +41,12 @@ public abstract class ShareActivity extends ContactSelectorActivity
 
 	@UiThread
 	@Override
-	public boolean onButtonClick(String text) {
+	public void onButtonClick(@Nullable String text) {
 		share(contacts, text);
 		setResult(RESULT_OK);
 		supportFinishAfterTransition();
-		return true;
 	}
 
-	abstract void share(Collection<ContactId> contacts, String text);
+	abstract void share(Collection<ContactId> contacts, @Nullable String text);
 
 }

briar-android/src/main/java/org/briarproject/briar/android/sharing/ShareBlogActivity.java

@@ -51,7 +51,7 @@ public class ShareBlogActivity extends ShareActivity {
 	}
 
 	@Override
-	void share(Collection<ContactId> contacts, String text) {
+	void share(Collection<ContactId> contacts, @Nullable String text) {
 		controller.share(groupId, contacts, text,
 				new UiExceptionHandler<DbException>(this) {
 					@Override

briar-android/src/main/java/org/briarproject/briar/android/sharing/ShareBlogController.java

@@ -9,10 +9,12 @@ import org.briarproject.briar.android.controller.handler.ExceptionHandler;
 
 import java.util.Collection;
 
+import javax.annotation.Nullable;
+
 public interface ShareBlogController
 		extends ContactSelectorController<SelectableContactItem> {
 
-	void share(GroupId g, Collection<ContactId> contacts, String text,
+	void share(GroupId g, Collection<ContactId> contacts, @Nullable String text,
 			ExceptionHandler<DbException> handler);
 
 }

briar-android/src/main/java/org/briarproject/briar/android/sharing/ShareBlogControllerImpl.java

@@ -20,12 +20,12 @@ import java.util.Collection;
 import java.util.concurrent.Executor;
 import java.util.logging.Logger;
 
+import javax.annotation.Nullable;
 import javax.annotation.concurrent.Immutable;
 import javax.inject.Inject;
 
 import static java.util.logging.Level.WARNING;
 import static org.briarproject.bramble.util.LogUtils.logException;
-import static org.briarproject.bramble.util.StringUtils.isNullOrEmpty;
 
 @Immutable
 @NotNullByDefault
@@ -56,17 +56,16 @@ class ShareBlogControllerImpl extends ContactSelectorControllerImpl
 	}
 
 	@Override
-	public void share(GroupId g, Collection<ContactId> contacts, String text,
-			ExceptionHandler<DbException> handler) {
+	public void share(GroupId g, Collection<ContactId> contacts, @Nullable
+			String text, ExceptionHandler<DbException> handler) {
 		runOnDbThread(() -> {
 			try {
-				String txt = isNullOrEmpty(text) ? null : text;
 				for (ContactId c : contacts) {
 					try {
 						long time = Math.max(clock.currentTimeMillis(),
 								conversationManager.getGroupCount(c)
 										.getLatestMsgTime() + 1);
-						blogSharingManager.sendInvitation(g, c, txt, time);
+						blogSharingManager.sendInvitation(g, c, text, time);
 					} catch (NoSuchContactException | NoSuchGroupException e) {
 						logException(LOG, WARNING, e);
 					}

briar-android/src/main/java/org/briarproject/briar/android/sharing/ShareForumActivity.java

@@ -51,7 +51,7 @@ public class ShareForumActivity extends ShareActivity {
 	}
 
 	@Override
-	void share(Collection<ContactId> contacts, String text) {
+	void share(Collection<ContactId> contacts, @Nullable String text) {
 		controller.share(groupId, contacts, text,
 				new UiExceptionHandler<DbException>(this) {
 					@Override

briar-android/src/main/java/org/briarproject/briar/android/sharing/ShareForumController.java

@@ -9,10 +9,12 @@ import org.briarproject.briar.android.controller.handler.ExceptionHandler;
 
 import java.util.Collection;
 
+import javax.annotation.Nullable;
+
 public interface ShareForumController
 		extends ContactSelectorController<SelectableContactItem> {
 
-	void share(GroupId g, Collection<ContactId> contacts, String text,
+	void share(GroupId g, Collection<ContactId> contacts, @Nullable String text,
 			ExceptionHandler<DbException> handler);
 
 }

briar-android/src/main/java/org/briarproject/briar/android/sharing/ShareForumControllerImpl.java

@@ -13,19 +13,19 @@ import org.briarproject.bramble.api.sync.GroupId;
 import org.briarproject.bramble.api.system.Clock;
 import org.briarproject.briar.android.contactselection.ContactSelectorControllerImpl;
 import org.briarproject.briar.android.controller.handler.ExceptionHandler;
-import org.briarproject.briar.api.forum.ForumSharingManager;
 import org.briarproject.briar.api.conversation.ConversationManager;
+import org.briarproject.briar.api.forum.ForumSharingManager;
 
 import java.util.Collection;
 import java.util.concurrent.Executor;
 import java.util.logging.Logger;
 
+import javax.annotation.Nullable;
 import javax.annotation.concurrent.Immutable;
 import javax.inject.Inject;
 
 import static java.util.logging.Level.WARNING;
 import static org.briarproject.bramble.util.LogUtils.logException;
-import static org.briarproject.bramble.util.StringUtils.isNullOrEmpty;
 
 @Immutable
 @NotNullByDefault
@@ -57,16 +57,15 @@ class ShareForumControllerImpl extends ContactSelectorControllerImpl
 
 	@Override
 	public void share(GroupId g, Collection<ContactId> contacts,
-			String text, ExceptionHandler<DbException> handler) {
+			@Nullable String text, ExceptionHandler<DbException> handler) {
 		runOnDbThread(() -> {
 			try {
-				String txt = isNullOrEmpty(text) ? null : text;
 				for (ContactId c : contacts) {
 					try {
 						long time = Math.max(clock.currentTimeMillis(),
 								conversationManager.getGroupCount(c)
 										.getLatestMsgTime() + 1);
-						forumSharingManager.sendInvitation(g, c, txt, time);
+						forumSharingManager.sendInvitation(g, c, text, time);
 					} catch (NoSuchContactException | NoSuchGroupException e) {
 						logException(LOG, WARNING, e);
 					}

briar-android/src/main/java/org/briarproject/briar/android/threaded/ThreadListActivity.java

@@ -1,6 +1,7 @@
 package org.briarproject.briar.android.threaded;
 
 import android.content.Intent;
+import android.net.Uri;
 import android.os.Bundle;
 import android.support.annotation.CallSuper;
 import android.support.annotation.StringRes;
@@ -26,13 +27,15 @@ import org.briarproject.briar.android.threaded.ThreadItemAdapter.ThreadItemListe
 import org.briarproject.briar.android.threaded.ThreadListController.ThreadListDataSource;
 import org.briarproject.briar.android.threaded.ThreadListController.ThreadListListener;
 import org.briarproject.briar.android.view.BriarRecyclerView;
+import org.briarproject.briar.android.view.KeyboardAwareLinearLayout;
 import org.briarproject.briar.android.view.TextInputView;
-import org.briarproject.briar.android.view.TextInputView.TextInputListener;
+import org.briarproject.briar.android.view.TextSendController;
+import org.briarproject.briar.android.view.TextSendController.SendListener;
 import org.briarproject.briar.android.view.UnreadMessageButton;
 import org.briarproject.briar.api.client.NamedGroup;
-import org.thoughtcrime.securesms.components.KeyboardAwareLinearLayout;
 
 import java.util.Collection;
+import java.util.List;
 import java.util.logging.Logger;
 
 import javax.annotation.Nullable;
@@ -42,14 +45,14 @@ import static android.support.design.widget.Snackbar.make;
 import static android.support.v7.widget.RecyclerView.NO_POSITION;
 import static android.support.v7.widget.RecyclerView.SCROLL_STATE_IDLE;
 import static java.util.logging.Level.INFO;
-import static org.briarproject.bramble.util.StringUtils.utf8IsTooLong;
+import static org.briarproject.bramble.util.StringUtils.isNullOrEmpty;
 import static org.briarproject.briar.android.threaded.ThreadItemAdapter.UnreadCount;
 
 @MethodsNotNullByDefault
 @ParametersNotNullByDefault
 public abstract class ThreadListActivity<G extends NamedGroup, I extends ThreadItem, A extends ThreadItemAdapter<I>>
 		extends BriarActivity
-		implements ThreadListListener<I>, TextInputListener, SharingListener,
+		implements ThreadListListener<I>, SendListener, SharingListener,
 		ThreadItemListener<I>, ThreadListDataSource {
 
 	protected static final String KEY_REPLY_ID = "replyId";
@@ -86,7 +89,10 @@ public abstract class ThreadListActivity<G extends NamedGroup, I extends ThreadI
 		getController().setGroupId(groupId);
 
 		textInput = findViewById(R.id.text_input_container);
-		textInput.setListener(this);
+		TextSendController sendController =
+				new TextSendController(textInput, this, false);
+		textInput.setSendController(sendController);
+		textInput.setMaxTextLength(getMaxTextLength());
 		list = findViewById(R.id.list);
 		layoutManager = new LinearLayoutManager(this);
 		// FIXME pre-fetching messes with read state, find better solution #1289
@@ -266,7 +272,7 @@ public abstract class ThreadListActivity<G extends NamedGroup, I extends ThreadI
 	@Override
 	public void onBackPressed() {
 		if (adapter.getHighlightedItem() != null) {
-			textInput.setText("");
+			textInput.clearText();
 			replyId = null;
 			updateTextInput();
 		} else {
@@ -348,13 +354,9 @@ public abstract class ThreadListActivity<G extends NamedGroup, I extends ThreadI
 	}
 
 	@Override
-	public void onSendClick(String text) {
-		if (text.trim().length() == 0)
-			return;
-		if (utf8IsTooLong(text, getMaxTextLength())) {
-			displaySnackbar(R.string.text_too_long);
-			return;
-		}
+	public void onSendClick(@Nullable String text, List<Uri> imageUris) {
+		if (isNullOrEmpty(text)) throw new AssertionError();
+
 		I replyItem = adapter.getHighlightedItem();
 		UiResultExceptionHandler<I, DbException> handler =
 				new UiResultExceptionHandler<I, DbException>(this) {
@@ -370,7 +372,7 @@ public abstract class ThreadListActivity<G extends NamedGroup, I extends ThreadI
 				};
 		getController().createAndStoreMessage(text, replyItem, handler);
 		textInput.hideSoftKeyboard();
-		textInput.setText("");
+		textInput.clearText();
 		replyId = null;
 		updateTextInput();
 	}

briar-android/src/main/java/org/briarproject/briar/android/util/UiUtils.java

@@ -207,7 +207,7 @@ public class UiUtils {
 				runnable.run();
 			}
 		};
-		ssb.setSpan(cSpan, start + 1, end, 0);
+		ssb.setSpan(cSpan, start, end, 0);
 		textView.setText(ssb);
 		textView.setMovementMethod(new LinkMovementMethod());
 	}

briar-android/src/main/java/org/briarproject/briar/android/view/BriarRecyclerView.java

@@ -28,6 +28,8 @@ public class BriarRecyclerView extends FrameLayout {
 
 	private final Handler handler = new Handler(Looper.getMainLooper());
 
+	private long PERIODIC_UPDATE_MILLIS = MIN_DATE_RESOLUTION;
+
 	private RecyclerView recyclerView;
 	private Group emptyState;
 	private AppCompatImageView emptyImage;
@@ -215,9 +217,9 @@ public class BriarRecyclerView extends FrameLayout {
 		refresher = () -> {
 			Adapter adapter = recyclerView.getAdapter();
 			adapter.notifyItemRangeChanged(0, adapter.getItemCount());
-			handler.postDelayed(refresher, MIN_DATE_RESOLUTION);
+			handler.postDelayed(refresher, PERIODIC_UPDATE_MILLIS);
 		};
-		handler.postDelayed(refresher, MIN_DATE_RESOLUTION);
+		handler.postDelayed(refresher, PERIODIC_UPDATE_MILLIS);
 	}
 
 	public void stopPeriodicUpdate() {
@@ -227,4 +229,8 @@ public class BriarRecyclerView extends FrameLayout {
 		}
 	}
 
+	public void setPERIODIC_UPDATE_MILLIS(long millis) {
+		PERIODIC_UPDATE_MILLIS = millis;
+	}
+
 }

briar-android/src/main/java/org/briarproject/briar/android/view/EmojiTextInputView.java

@@ -0,0 +1,239 @@
+package org.briarproject.briar.android.view;
+
+import android.content.Context;
+import android.content.res.TypedArray;
+import android.graphics.Rect;
+import android.os.IBinder;
+import android.support.annotation.Nullable;
+import android.support.annotation.StringRes;
+import android.support.v7.widget.AppCompatImageButton;
+import android.text.Editable;
+import android.text.TextWatcher;
+import android.util.AttributeSet;
+import android.view.LayoutInflater;
+import android.view.inputmethod.InputMethodManager;
+import android.widget.EditText;
+
+import com.vanniktech.emoji.EmojiEditText;
+import com.vanniktech.emoji.EmojiPopup;
+import com.vanniktech.emoji.RecentEmoji;
+
+import org.briarproject.briar.R;
+import org.briarproject.briar.android.BriarApplication;
+
+import javax.inject.Inject;
+
+import static android.content.Context.INPUT_METHOD_SERVICE;
+import static android.content.Context.LAYOUT_INFLATER_SERVICE;
+import static android.view.KeyEvent.KEYCODE_ENTER;
+import static android.view.inputmethod.InputMethodManager.SHOW_IMPLICIT;
+import static java.util.Objects.requireNonNull;
+import static org.briarproject.bramble.util.StringUtils.utf8IsTooLong;
+
+public class EmojiTextInputView extends KeyboardAwareLinearLayout implements
+		TextWatcher {
+
+	@Inject
+	RecentEmoji recentEmoji;
+
+	private final AppCompatImageButton emojiToggle;
+	private final EmojiPopup emojiPopup;
+	private final EditText editText;
+
+	@Nullable
+	private TextInputListener listener;
+	private int maxLength = Integer.MAX_VALUE;
+	private boolean emptyTextAllowed = false;
+	private boolean isEmpty = true;
+
+	public EmojiTextInputView(Context context) {
+		this(context, null);
+	}
+
+	public EmojiTextInputView(Context context, @Nullable AttributeSet attrs) {
+		this(context, attrs, 0);
+	}
+
+	public EmojiTextInputView(Context context, @Nullable AttributeSet attrs,
+			int defStyleAttr) {
+		super(context, attrs, defStyleAttr);
+
+		// inflate layout
+		LayoutInflater inflater = (LayoutInflater) requireNonNull(
+				context.getSystemService(LAYOUT_INFLATER_SERVICE));
+		inflater.inflate(R.layout.emoji_text_input_view, this, true);
+
+		// get attributes
+		TypedArray a = context.obtainStyledAttributes(attrs,
+				R.styleable.EmojiTextInputView);
+		int paddingBottom = a.getDimensionPixelSize(
+				R.styleable.EmojiTextInputView_textPaddingBottom, 0);
+		int paddingEnd = a.getDimensionPixelSize(
+				R.styleable.EmojiTextInputView_textPaddingEnd, 0);
+		int maxLines =
+				a.getInteger(R.styleable.EmojiTextInputView_maxTextLines, 0);
+		a.recycle();
+
+		// apply attributes to editText
+		editText = findViewById(R.id.input_text);
+		editText.setPadding(0, 0, paddingEnd, paddingBottom);
+		if (maxLines > 0) editText.setMaxLines(maxLines);
+		editText.setOnClickListener(v -> showSoftKeyboard());
+		editText.addTextChangedListener(this);
+		// support sending with Ctrl+Enter
+		editText.setOnKeyListener((v, keyCode, event) -> {
+			if (listener != null && keyCode == KEYCODE_ENTER &&
+					event.isCtrlPressed()) {
+				listener.onSendEvent();
+				return true;
+			}
+			return false;
+		});
+		emojiToggle = findViewById(R.id.emoji_toggle);
+
+		// stuff we can't do in edit mode goes below
+		if (isInEditMode()) {
+			emojiPopup = null;
+			return;
+		}
+		BriarApplication app =
+				(BriarApplication) context.getApplicationContext();
+		app.getApplicationComponent().inject(this);
+		emojiPopup = EmojiPopup.Builder
+				.fromRootView(this)
+				.setRecentEmoji(recentEmoji)
+				.setOnEmojiPopupShownListener(this::showKeyboardIcon)
+				.setOnEmojiPopupDismissListener(this::showEmojiIcon)
+				.build((EmojiEditText) editText);
+		emojiToggle.setOnClickListener(v -> emojiPopup.toggle());
+	}
+
+	@Override
+	public void beforeTextChanged(CharSequence s, int start, int count,
+			int after) {
+	}
+
+	@Override
+	public void onTextChanged(CharSequence s, int start, int before,
+			int count) {
+		// Need to start at position 0 to change empty
+		if (start != 0 || emptyTextAllowed || listener == null) return;
+		if (s.length() == 0) {
+			if (!isEmpty) {
+				isEmpty = true;
+				listener.onTextIsEmptyChanged(true);
+			}
+		} else if (isEmpty) {
+			isEmpty = false;
+			listener.onTextIsEmptyChanged(false);
+		}
+	}
+
+	@Override
+	public void afterTextChanged(Editable s) {
+	}
+
+	@Override
+	public void setEnabled(boolean enabled) {
+		super.setEnabled(enabled);
+		editText.setEnabled(enabled);
+		emojiToggle.setEnabled(enabled);
+	}
+
+	@Override
+	public void setGravity(int gravity) {
+		editText.setGravity(gravity);
+	}
+
+	@Override
+	public boolean requestFocus(int direction, Rect previouslyFocusedRect) {
+		return editText.requestFocus(direction, previouslyFocusedRect);
+	}
+
+	@Override
+	public void onDetachedFromWindow() {
+		super.onDetachedFromWindow();
+		if (emojiPopup.isShowing()) emojiPopup.dismiss();
+	}
+
+	void setTextInputListener(@Nullable TextInputListener listener) {
+		this.listener = listener;
+	}
+
+	void setAllowEmptyText(boolean emptyTextAllowed) {
+		this.emptyTextAllowed = emptyTextAllowed;
+	}
+
+	void setMaxLength(int maxLength) {
+		this.maxLength = maxLength;
+	}
+
+	void setMaxLines(int maxLines) {
+		editText.setMaxLines(maxLines);
+	}
+
+	/**
+	 * Returns the current text or {@code null},
+	 * if it is empty or only consists of white-spaces.
+	 */
+	@Nullable
+	String getText() {
+		Editable editable = editText.getText();
+		String str = editable == null ? null : editable.toString().trim();
+		if (str == null || str.length() == 0) return null;
+		return str;
+	}
+
+	void clearText() {
+		editText.setText(null);
+	}
+
+	boolean isEmpty() {
+		return getText() == null;
+	}
+
+	boolean isTooLong() {
+		return editText.getText() != null &&
+				utf8IsTooLong(editText.getText().toString().trim(), maxLength);
+	}
+
+	CharSequence getHint() {
+		return editText.getHint();
+	}
+
+	void setHint(@StringRes int res) {
+		setHint(getContext().getString(res));
+	}
+
+	void setHint(CharSequence hint) {
+		editText.setHint(hint);
+	}
+
+	private void showEmojiIcon() {
+		emojiToggle.setImageResource(R.drawable.ic_emoji_toggle);
+	}
+
+	private void showKeyboardIcon() {
+		emojiToggle.setImageResource(R.drawable.ic_keyboard);
+	}
+
+	void showSoftKeyboard() {
+		Object o = getContext().getSystemService(INPUT_METHOD_SERVICE);
+		InputMethodManager imm = (InputMethodManager) requireNonNull(o);
+		imm.showSoftInput(editText, SHOW_IMPLICIT);
+	}
+
+	void hideSoftKeyboard() {
+		if (emojiPopup.isShowing()) emojiPopup.dismiss();
+		IBinder token = editText.getWindowToken();
+		Object o = getContext().getSystemService(INPUT_METHOD_SERVICE);
+		InputMethodManager imm = (InputMethodManager) requireNonNull(o);
+		imm.hideSoftInputFromWindow(token, 0);
+	}
+
+	interface TextInputListener {
+		void onTextIsEmptyChanged(boolean isEmpty);
+		void onSendEvent();
+	}
+
+}

briar-android/src/main/java/org/briarproject/briar/android/view/ImagePreview.java

@@ -0,0 +1,119 @@
+package org.briarproject.briar.android.view;
+
+import android.content.Context;
+import android.graphics.Bitmap;
+import android.net.Uri;
+import android.support.annotation.Nullable;
+import android.support.constraint.ConstraintLayout;
+import android.support.v7.graphics.Palette;
+import android.util.AttributeSet;
+import android.view.LayoutInflater;
+import android.widget.ImageView;
+import android.widget.Toast;
+
+import com.bumptech.glide.load.DataSource;
+import com.bumptech.glide.load.engine.GlideException;
+import com.bumptech.glide.request.RequestListener;
+import com.bumptech.glide.request.target.Target;
+
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
+import org.briarproject.briar.R;
+import org.briarproject.briar.android.conversation.glide.GlideApp;
+
+import java.util.List;
+
+import static android.content.Context.LAYOUT_INFLATER_SERVICE;
+import static android.graphics.Color.BLACK;
+import static android.graphics.Color.WHITE;
+import static android.support.v7.app.AppCompatDelegate.MODE_NIGHT_YES;
+import static android.support.v7.app.AppCompatDelegate.getDefaultNightMode;
+import static android.widget.Toast.LENGTH_LONG;
+import static com.bumptech.glide.load.engine.DiskCacheStrategy.NONE;
+import static com.bumptech.glide.load.resource.bitmap.DownsampleStrategy.FIT_CENTER;
+import static java.util.Objects.requireNonNull;
+
+@NotNullByDefault
+public class ImagePreview extends ConstraintLayout {
+
+	private final ImageView imageView;
+	private final int backgroundColor =
+			getDefaultNightMode() == MODE_NIGHT_YES ? BLACK : WHITE;
+
+	@Nullable
+	private ImagePreviewListener listener;
+
+	public ImagePreview(Context context) {
+		this(context, null);
+	}
+
+	public ImagePreview(Context context, @Nullable AttributeSet attrs) {
+		this(context, attrs, 0);
+	}
+
+	public ImagePreview(Context context, @Nullable AttributeSet attrs,
+			int defStyleAttr) {
+		super(context, attrs, defStyleAttr);
+
+		// inflate layout
+		LayoutInflater inflater = (LayoutInflater) requireNonNull(
+				context.getSystemService(LAYOUT_INFLATER_SERVICE));
+		inflater.inflate(R.layout.image_preview, this, true);
+
+		// find image view and set background color
+		imageView = findViewById(R.id.imageView);
+		imageView.setBackgroundColor(backgroundColor);
+
+		// set cancel listener
+		findViewById(R.id.imageCancelButton).setOnClickListener(view -> {
+			if (listener != null) listener.onCancel();
+		});
+	}
+
+	void setImagePreviewListener(ImagePreviewListener listener) {
+		this.listener = listener;
+	}
+
+	void showPreview(List<Uri> imageUris) {
+		setVisibility(VISIBLE);
+		GlideApp.with(imageView)
+				.asBitmap()
+				.load(imageUris.get(0))  // TODO show more than the first
+				.diskCacheStrategy(NONE)
+				.downsample(FIT_CENTER)
+				.addListener(new RequestListener<Bitmap>() {
+					@Override
+					public boolean onLoadFailed(@Nullable GlideException e,
+							Object model, Target<Bitmap> target,
+							boolean isFirstResource) {
+						if (listener != null) listener.onCancel();
+						Toast.makeText(imageView.getContext(),
+								R.string.image_attach_error, LENGTH_LONG)
+								.show();
+						return false;
+					}
+
+					@Override
+					public boolean onResourceReady(Bitmap resource,
+							Object model, Target<Bitmap> target,
+							DataSource dataSource, boolean isFirstResource) {
+						Palette.from(resource).generate(
+								ImagePreview.this::onPaletteGenerated);
+						return false;
+					}
+				})
+				.into(imageView);
+	}
+
+	void onPaletteGenerated(@Nullable Palette palette) {
+		if (palette == null) return;
+		int color = getDefaultNightMode() == MODE_NIGHT_YES ?
+				palette.getDarkMutedColor(backgroundColor) :
+				palette.getLightMutedColor(backgroundColor);
+		imageView.setBackgroundColor(color);
+	}
+
+	interface ImagePreviewListener {
+		void onCancel();
+	}
+
+}

briar-android/src/main/java/org/briarproject/briar/android/view/KeyboardAwareLinearLayout.java

@@ -1,4 +1,8 @@
-package org.thoughtcrime.securesms.components;
+/*
+  Taken from Signal, licences under GPLv3
+ */
+
+package org.briarproject.briar.android.view;
 
 import android.annotation.TargetApi;
 import android.content.Context;
@@ -24,6 +28,7 @@ import javax.annotation.Nullable;
 import static android.content.Context.WINDOW_SERVICE;
 import static android.view.Surface.ROTATION_270;
 import static android.view.Surface.ROTATION_90;
+import static java.util.Objects.requireNonNull;
 import static java.util.logging.Level.INFO;
 import static java.util.logging.Level.WARNING;
 
@@ -38,8 +43,6 @@ public class KeyboardAwareLinearLayout extends LinearLayout {
 			Logger.getLogger(KeyboardAwareLinearLayout.class.getName());
 
 	private final Rect rect = new Rect();
-	private final Set<OnKeyboardHiddenListener> hiddenListeners =
-			new HashSet<>();
 	private final Set<OnKeyboardShownListener> shownListeners = new HashSet<>();
 	private final int minKeyboardSize;
 	private final int minCustomKeyboardSize;
@@ -153,7 +156,6 @@ public class KeyboardAwareLinearLayout extends LinearLayout {
 	protected void onKeyboardClose() {
 		LOG.info("onKeyboardClose()");
 		keyboardOpen = false;
-		notifyHiddenListeners();
 	}
 
 	public boolean isKeyboardOpen() {
@@ -173,7 +175,7 @@ public class KeyboardAwareLinearLayout extends LinearLayout {
 	private int getDeviceRotation() {
 		WindowManager windowManager =
 				(WindowManager) getContext().getSystemService(WINDOW_SERVICE);
-		return windowManager.getDefaultDisplay().getRotation();
+		return requireNonNull(windowManager).getDefaultDisplay().getRotation();
 	}
 
 	private int getKeyboardLandscapeHeight() {
@@ -199,43 +201,6 @@ public class KeyboardAwareLinearLayout extends LinearLayout {
 		prefs.edit().putInt("keyboard_height_portrait", height).apply();
 	}
 
-	public void postOnKeyboardClose(Runnable runnable) {
-		if (keyboardOpen) {
-			addOnKeyboardHiddenListener(new OnKeyboardHiddenListener() {
-				@Override
-				public void onKeyboardHidden() {
-					removeOnKeyboardHiddenListener(this);
-					runnable.run();
-				}
-			});
-		} else {
-			runnable.run();
-		}
-	}
-
-	public void postOnKeyboardOpen(Runnable runnable) {
-		if (!keyboardOpen) {
-			addOnKeyboardShownListener(new OnKeyboardShownListener() {
-				@Override
-				public void onKeyboardShown() {
-					removeOnKeyboardShownListener(this);
-					runnable.run();
-				}
-			});
-		} else {
-			runnable.run();
-		}
-	}
-
-	public void addOnKeyboardHiddenListener(OnKeyboardHiddenListener listener) {
-		hiddenListeners.add(listener);
-	}
-
-	public void removeOnKeyboardHiddenListener(
-			OnKeyboardHiddenListener listener) {
-		hiddenListeners.remove(listener);
-	}
-
 	public void addOnKeyboardShownListener(OnKeyboardShownListener listener) {
 		shownListeners.add(listener);
 	}
@@ -245,15 +210,6 @@ public class KeyboardAwareLinearLayout extends LinearLayout {
 		shownListeners.remove(listener);
 	}
 
-	private void notifyHiddenListeners() {
-		// Make a copy as listeners may remove themselves when called
-		Set<OnKeyboardHiddenListener> listeners =
-				new HashSet<>(hiddenListeners);
-		for (OnKeyboardHiddenListener listener : listeners) {
-			listener.onKeyboardHidden();
-		}
-	}
-
 	private void notifyShownListeners() {
 		// Make a copy as listeners may remove themselves when called
 		Set<OnKeyboardShownListener> listeners = new HashSet<>(shownListeners);
@@ -262,11 +218,8 @@ public class KeyboardAwareLinearLayout extends LinearLayout {
 		}
 	}
 
-	public interface OnKeyboardHiddenListener {
-		void onKeyboardHidden();
-	}
-
 	public interface OnKeyboardShownListener {
 		void onKeyboardShown();
 	}
+
 }

briar-android/src/main/java/org/briarproject/briar/android/view/LargeTextInputView.java

@@ -4,7 +4,6 @@ import android.content.Context;
 import android.content.res.TypedArray;
 import android.support.annotation.UiThread;
 import android.util.AttributeSet;
-import android.view.LayoutInflater;
 import android.view.ViewGroup;
 import android.widget.Button;
 
@@ -14,6 +13,7 @@ import org.briarproject.briar.R;
 
 import javax.annotation.Nullable;
 
+import static android.view.Gravity.BOTTOM;
 import static android.view.ViewGroup.LayoutParams.MATCH_PARENT;
 
 @UiThread
@@ -32,18 +32,6 @@ public class LargeTextInputView extends TextInputView {
 	public LargeTextInputView(Context context, @Nullable AttributeSet attrs,
 			int defStyleAttr) {
 		super(context, attrs, defStyleAttr);
-	}
-
-	@Override
-	protected void inflateLayout(Context context) {
-		LayoutInflater inflater = (LayoutInflater) context
-				.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
-		inflater.inflate(R.layout.text_input_view_large, this, true);
-	}
-
-	@Override
-	protected void setUpViews(Context context, @Nullable AttributeSet attrs) {
-		super.setUpViews(context, attrs);
 
 		// get attributes
 		TypedArray attributes = context.obtainStyledAttributes(attrs,
@@ -57,21 +45,27 @@ public class LargeTextInputView extends TextInputView {
 		attributes.recycle();
 
 		if (buttonText != null) setButtonText(buttonText);
-		if (maxLines > 0) editText.setMaxLines(maxLines);
+		if (maxLines > 0) textInput.setMaxLines(maxLines);
 		if (fillHeight) {
 			ViewGroup layout = findViewById(R.id.input_layout);
 			LayoutParams params = (LayoutParams) layout.getLayoutParams();
 			params.height = 0;
 			params.weight = 1;
 			layout.setLayoutParams(params);
-			ViewGroup.LayoutParams editParams = editText.getLayoutParams();
-			editParams.height = MATCH_PARENT;
-			editText.setLayoutParams(editParams);
+			ViewGroup.LayoutParams inputParams = textInput.getLayoutParams();
+			inputParams.height = MATCH_PARENT;
+			textInput.setLayoutParams(inputParams);
 		}
+		textInput.setGravity(BOTTOM);
+	}
+
+	@Override
+	protected int getLayout() {
+		return R.layout.text_input_view_large;
 	}
 
 	public void setButtonText(String text) {
-		((Button) sendButton).setText(text);
+		((Button) findViewById(R.id.btn_send)).setText(text);
 	}
 
 }

briar-android/src/main/java/org/briarproject/briar/android/view/QrCodeView.java

@@ -39,6 +39,9 @@ public class QrCodeView extends FrameLayout {
                         listener.setFullscreen(fullscreen);
                 }
         );
+
+        // TODO remove
+        fullscreenButton.setVisibility(INVISIBLE);
     }
 
     @UiThread

briar-android/src/main/java/org/briarproject/briar/android/view/TextAttachmentController.java

@@ -0,0 +1,214 @@
+package org.briarproject.briar.android.view;
+
+import android.content.ClipData;
+import android.content.Intent;
+import android.net.Uri;
+import android.os.Parcel;
+import android.os.Parcelable;
+import android.support.annotation.NonNull;
+import android.support.annotation.Nullable;
+import android.support.annotation.UiThread;
+import android.support.v4.view.AbsSavedState;
+import android.support.v7.widget.AppCompatImageButton;
+
+import org.briarproject.briar.R;
+import org.briarproject.briar.android.view.ImagePreview.ImagePreviewListener;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import static android.content.Intent.ACTION_GET_CONTENT;
+import static android.content.Intent.ACTION_OPEN_DOCUMENT;
+import static android.content.Intent.CATEGORY_OPENABLE;
+import static android.content.Intent.EXTRA_ALLOW_MULTIPLE;
+import static android.os.Build.VERSION.SDK_INT;
+import static android.support.v4.view.AbsSavedState.EMPTY_STATE;
+import static android.view.View.GONE;
+import static android.view.View.INVISIBLE;
+import static android.view.View.VISIBLE;
+import static java.util.Collections.emptyList;
+import static java.util.Collections.singletonList;
+import static java.util.Objects.requireNonNull;
+
+@UiThread
+public class TextAttachmentController extends TextSendController
+		implements ImagePreviewListener {
+
+	private final AppCompatImageButton imageButton;
+	private final ImagePreview imagePreview;
+
+	private final AttachImageListener imageListener;
+
+	private CharSequence textHint;
+	private List<Uri> imageUris = emptyList();
+
+	public TextAttachmentController(TextInputView v, ImagePreview imagePreview,
+			SendListener listener, AttachImageListener imageListener) {
+		super(v, listener, false);
+		this.imageListener = imageListener;
+		this.imagePreview = imagePreview;
+		this.imagePreview.setImagePreviewListener(this);
+
+		imageButton = v.findViewById(R.id.imageButton);
+		imageButton.setOnClickListener(view -> onImageButtonClicked());
+
+		textHint = textInput.getHint();
+
+		// show image button
+		showImageButton(true);
+	}
+
+	@Override
+	public void onTextIsEmptyChanged(boolean isEmpty) {
+		if (imageUris.isEmpty()) showImageButton(isEmpty);
+	}
+
+	@Override
+	public void onSendEvent() {
+		if (canSend()) {
+			listener.onSendClick(textInput.getText(), imageUris);
+			reset();
+		}
+	}
+
+	@Override
+	protected boolean canSendEmptyText() {
+		return !imageUris.isEmpty();
+	}
+
+	private void onImageButtonClicked() {
+		Intent intent = new Intent(SDK_INT >= 19 ?
+				ACTION_OPEN_DOCUMENT : ACTION_GET_CONTENT);
+		intent.addCategory(CATEGORY_OPENABLE);
+		intent.setType("image/*");
+		if (SDK_INT >= 18)  // TODO set true to allow attaching multiple images
+			intent.putExtra(EXTRA_ALLOW_MULTIPLE, false);
+		requireNonNull(imageListener).onAttachImage(intent);
+	}
+
+	public void onImageReceived(@Nullable Intent resultData) {
+		if (resultData == null) return;
+		if (resultData.getData() != null) {
+			imageUris = singletonList(resultData.getData());
+			onNewUris();
+		} else if (SDK_INT >= 18 && resultData.getClipData() != null) {
+			ClipData clipData = resultData.getClipData();
+			imageUris = new ArrayList<>(clipData.getItemCount());
+			for (int i = 0; i < clipData.getItemCount(); i++) {
+				imageUris.add(clipData.getItemAt(i).getUri());
+			}
+			onNewUris();
+		}
+	}
+
+	private void onNewUris() {
+		if (imageUris.isEmpty()) return;
+		showImageButton(false);
+		textInput.setHint(R.string.image_caption_hint);
+		imagePreview.showPreview(imageUris);
+	}
+
+	private void showImageButton(boolean showImageButton) {
+		if (showImageButton) {
+			imageButton.setVisibility(VISIBLE);
+			sendButton.setEnabled(false);
+			if (SDK_INT <= 15) {
+				sendButton.setVisibility(INVISIBLE);
+				imageButton.setEnabled(true);
+			} else {
+				sendButton.clearAnimation();
+				sendButton.animate().alpha(0f).withEndAction(() -> {
+					sendButton.setVisibility(INVISIBLE);
+					imageButton.setEnabled(true);
+				}).start();
+				imageButton.clearAnimation();
+				imageButton.animate().alpha(1f).start();
+			}
+		} else {
+			sendButton.setVisibility(VISIBLE);
+			// enable/disable buttons right away to allow fast sending
+			sendButton.setEnabled(enabled);
+			imageButton.setEnabled(false);
+			if (SDK_INT <= 15) {
+				imageButton.setVisibility(INVISIBLE);
+			} else {
+				sendButton.clearAnimation();
+				sendButton.animate().alpha(1f).start();
+				imageButton.clearAnimation();
+				imageButton.animate().alpha(0f).withEndAction(() ->
+						imageButton.setVisibility(INVISIBLE)
+				).start();
+			}
+		}
+	}
+
+	private void reset() {
+		// restore hint
+		textInput.setHint(textHint);
+		// hide image layout
+		imagePreview.setVisibility(GONE);
+		// reset image URIs
+		imageUris = emptyList();
+		// show the image button again, so images can get attached
+		showImageButton(true);
+	}
+
+	@Override
+	public Parcelable onSaveInstanceState(@Nullable Parcelable superState) {
+		SavedState state =
+				new SavedState(superState == null ? EMPTY_STATE : superState);
+		state.imageUris = imageUris;
+		return state;
+	}
+
+	@Override
+	@Nullable
+	public Parcelable onRestoreInstanceState(@NonNull Parcelable inState) {
+		SavedState state = (SavedState) inState;
+		imageUris = state.imageUris;
+		onNewUris();
+		return state.getSuperState();
+	}
+
+	@Override
+	public void onCancel() {
+		textInput.clearText();
+		reset();
+	}
+
+	private static class SavedState extends AbsSavedState {
+		private List<Uri> imageUris;
+
+		private SavedState(Parcelable superState) {
+			super(superState);
+		}
+
+		private SavedState(Parcel in) {
+			super(in);
+			//noinspection unchecked
+			imageUris = in.readArrayList(Uri.class.getClassLoader());
+		}
+
+		@Override
+		public void writeToParcel(Parcel out, int flags) {
+			super.writeToParcel(out, flags);
+			out.writeList(imageUris);
+		}
+
+		public static final Parcelable.Creator<SavedState> CREATOR
+				= new Parcelable.Creator<SavedState>() {
+			public SavedState createFromParcel(Parcel in) {
+				return new SavedState(in);
+			}
+
+			public SavedState[] newArray(int size) {
+				return new SavedState[size];
+			}
+		};
+	}
+
+	public interface AttachImageListener {
+		void onAttachImage(Intent intent);
+	}
+
+}

briar-android/src/main/java/org/briarproject/briar/android/view/TextInputView.java

@@ -4,51 +4,31 @@ import android.animation.LayoutTransition;
 import android.content.Context;
 import android.content.res.TypedArray;
 import android.graphics.Rect;
-import android.os.IBinder;
-import android.support.annotation.CallSuper;
+import android.os.Parcelable;
+import android.support.annotation.LayoutRes;
+import android.support.annotation.Nullable;
 import android.support.annotation.StringRes;
 import android.support.annotation.UiThread;
-import android.support.v7.widget.AppCompatImageButton;
-import android.text.Editable;
-import android.text.TextWatcher;
 import android.util.AttributeSet;
 import android.view.LayoutInflater;
-import android.view.View;
-import android.view.inputmethod.InputMethodManager;
-
-import com.vanniktech.emoji.EmojiEditText;
-import com.vanniktech.emoji.EmojiPopup;
-import com.vanniktech.emoji.RecentEmoji;
+import android.widget.LinearLayout;
 
 import org.briarproject.bramble.api.nullsafety.MethodsNotNullByDefault;
 import org.briarproject.bramble.api.nullsafety.ParametersNotNullByDefault;
 import org.briarproject.briar.R;
-import org.briarproject.briar.android.BriarApplication;
-import org.thoughtcrime.securesms.components.KeyboardAwareLinearLayout;
+import org.briarproject.briar.android.view.KeyboardAwareLinearLayout.OnKeyboardShownListener;
 
-import javax.annotation.Nullable;
-import javax.inject.Inject;
-
-import static android.content.Context.INPUT_METHOD_SERVICE;
 import static android.content.Context.LAYOUT_INFLATER_SERVICE;
-import static android.view.KeyEvent.KEYCODE_ENTER;
-import static android.view.inputmethod.InputMethodManager.SHOW_IMPLICIT;
+import static java.util.Objects.requireNonNull;
 
 @UiThread
 @MethodsNotNullByDefault
 @ParametersNotNullByDefault
-public class TextInputView extends KeyboardAwareLinearLayout {
-
-	@Inject
-	RecentEmoji recentEmoji;
+public class TextInputView extends LinearLayout {
 
 	@Nullable
-	TextInputListener listener;
-
-	AppCompatImageButton emojiToggle;
-	EmojiEditText editText;
-	EmojiPopup emojiPopup;
-	View sendButton;
+	TextSendController textSendController;
+	final EmojiTextInputView textInput;
 
 	public TextInputView(Context context) {
 		this(context, null);
@@ -61,118 +41,109 @@ public class TextInputView extends KeyboardAwareLinearLayout {
 	public TextInputView(Context context, @Nullable AttributeSet attrs,
 			int defStyleAttr) {
 		super(context, attrs, defStyleAttr);
-		if (!isInEditMode()) {
-			BriarApplication app =
-					(BriarApplication) context.getApplicationContext();
-			app.getApplicationComponent().inject(this);
-		}
+		setSaveEnabled(true);
 		setOrientation(VERTICAL);
 		setLayoutTransition(new LayoutTransition());
-		inflateLayout(context);
-		setUpViews(context, attrs);
-	}
 
-	protected void inflateLayout(Context context) {
-		LayoutInflater inflater = (LayoutInflater) context
-				.getSystemService(LAYOUT_INFLATER_SERVICE);
-		inflater.inflate(R.layout.text_input_view, this, true);
-	}
-
-	@CallSuper
-	protected void setUpViews(Context context, @Nullable AttributeSet attrs) {
-		emojiToggle = findViewById(R.id.emoji_toggle);
-		editText = findViewById(R.id.input_text);
-		emojiPopup = EmojiPopup.Builder
-				.fromRootView(this)
-				.setRecentEmoji(recentEmoji)
-				.setOnEmojiPopupShownListener(this::showKeyboardIcon)
-				.setOnEmojiPopupDismissListener(this::showEmojiIcon)
-				.build(editText);
-		sendButton = findViewById(R.id.btn_send);
+		// inflate layout
+		LayoutInflater inflater = (LayoutInflater) requireNonNull(
+				context.getSystemService(LAYOUT_INFLATER_SERVICE));
+		inflater.inflate(getLayout(), this, true);
 
 		// get attributes
 		TypedArray attributes = context.obtainStyledAttributes(attrs,
 				R.styleable.TextInputView);
 		String hint = attributes.getString(R.styleable.TextInputView_hint);
+		boolean allowEmptyText = attributes
+				.getBoolean(R.styleable.TextInputView_allowEmptyText, false);
 		attributes.recycle();
 
-		if (hint != null) editText.setHint(hint);
-
-		emojiToggle.setOnClickListener(v -> emojiPopup.toggle());
-		editText.setOnClickListener(v -> showSoftKeyboard());
-		editText.setOnKeyListener((v, keyCode, event) -> {
-			if (keyCode == KEYCODE_ENTER && event.isCtrlPressed()) {
-				trySendMessage();
-				return true;
-			}
-			return false;
-		});
-		sendButton.setOnClickListener(v -> trySendMessage());
+		textInput = findViewById(R.id.emojiTextInput);
+		textInput.setAllowEmptyText(allowEmptyText);
+		if (hint != null) textInput.setHint(hint);
 	}
 
-	private void showEmojiIcon() {
-		emojiToggle.setImageResource(R.drawable.ic_emoji_toggle);
+	@LayoutRes
+	protected int getLayout() {
+		return R.layout.text_input_view;
 	}
 
-	private void showKeyboardIcon() {
-		emojiToggle.setImageResource(R.drawable.ic_keyboard);
-	}
-
-	private void trySendMessage() {
-		if (listener != null) {
-			listener.onSendClick(editText.getText().toString());
+	@Nullable
+	@Override
+	protected Parcelable onSaveInstanceState() {
+		Parcelable superState = super.onSaveInstanceState();
+		if (textSendController != null) {
+			superState = textSendController.onSaveInstanceState(superState);
 		}
+		return superState;
+	}
+
+	@Override
+	protected void onRestoreInstanceState(Parcelable state) {
+		if (textSendController != null) {
+			Parcelable outState =
+					textSendController.onRestoreInstanceState(state);
+			super.onRestoreInstanceState(outState);
+		} else {
+			super.onRestoreInstanceState(state);
+		}
+	}
+
+	/**
+	 * Call this in onCreate() before any other methods of this class.
+	 */
+	public <T extends TextSendController> void setSendController(T controller) {
+		textSendController = controller;
+		textInput.setTextInputListener(textSendController);
+	}
+
+	@Override
+	public void setEnabled(boolean enabled) {
+		super.setEnabled(enabled);
+		textInput.setEnabled(enabled);
+		requireNonNull(textSendController).setEnabled(enabled);
 	}
 
 	@Override
 	public boolean requestFocus(int direction, Rect previouslyFocusedRect) {
-		return editText.requestFocus(direction, previouslyFocusedRect);
+		return textInput.requestFocus(direction, previouslyFocusedRect);
 	}
 
-	@Override
-	public void onDetachedFromWindow() {
-		super.onDetachedFromWindow();
-		if (emojiPopup.isShowing()) emojiPopup.dismiss();
+	EmojiTextInputView getEmojiTextInputView() {
+		return textInput;
 	}
 
-	public void setText(String text) {
-		editText.setText(text);
-	}
-
-	public Editable getText() {
-		return editText.getText();
+	public void clearText() {
+		textInput.clearText();
 	}
 
 	public void setHint(@StringRes int res) {
-		editText.setHint(res);
+		textInput.setHint(getContext().getString(res));
 	}
 
-	public void setSendButtonEnabled(boolean enabled) {
-		sendButton.setEnabled(enabled);
+	public void setMaxTextLength(int maxLength) {
+		textInput.setMaxLength(maxLength);
 	}
 
-	public void addTextChangedListener(TextWatcher watcher) {
-		editText.addTextChangedListener(watcher);
-	}
-
-	public void setListener(TextInputListener listener) {
-		this.listener = listener;
+	public boolean isKeyboardOpen() {
+		return textInput.isKeyboardOpen();
 	}
 
 	public void showSoftKeyboard() {
-		Object o = getContext().getSystemService(INPUT_METHOD_SERVICE);
-		((InputMethodManager) o).showSoftInput(editText, SHOW_IMPLICIT);
+		textInput.showSoftKeyboard();
 	}
 
 	public void hideSoftKeyboard() {
-		if (emojiPopup.isShowing()) emojiPopup.dismiss();
-		IBinder token = editText.getWindowToken();
-		Object o = getContext().getSystemService(INPUT_METHOD_SERVICE);
-		((InputMethodManager) o).hideSoftInputFromWindow(token, 0);
+		textInput.hideSoftKeyboard();
 	}
 
-	public interface TextInputListener {
-		void onSendClick(String text);
+	public void addOnKeyboardShownListener(OnKeyboardShownListener listener) {
+		textInput.addOnKeyboardShownListener(listener);
+	}
+
+	public void removeOnKeyboardShownListener(
+			OnKeyboardShownListener listener) {
+		textInput.removeOnKeyboardShownListener(listener);
 	}
 
 }

briar-android/src/main/java/org/briarproject/briar/android/view/TextSendController.java

@@ -0,0 +1,88 @@
+package org.briarproject.briar.android.view;
+
+import android.net.Uri;
+import android.os.Parcelable;
+import android.support.annotation.CallSuper;
+import android.support.annotation.Nullable;
+import android.support.annotation.UiThread;
+import android.support.design.widget.Snackbar;
+import android.view.View;
+
+import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
+import org.briarproject.briar.R;
+import org.briarproject.briar.android.view.EmojiTextInputView.TextInputListener;
+
+import java.util.List;
+
+import static android.support.design.widget.Snackbar.LENGTH_SHORT;
+import static java.util.Collections.emptyList;
+
+@UiThread
+@NotNullByDefault
+public class TextSendController implements TextInputListener {
+
+	protected final EmojiTextInputView textInput;
+	protected final View sendButton;
+	protected final SendListener listener;
+	protected boolean enabled = true;
+	protected final boolean allowEmptyText;
+
+	private boolean wasEmpty = true;
+
+	public TextSendController(TextInputView v, SendListener listener,
+			boolean allowEmptyText) {
+		this.sendButton = v.findViewById(R.id.btn_send);
+		this.sendButton.setOnClickListener(view -> onSendEvent());
+		this.sendButton.setEnabled(allowEmptyText);
+		this.listener = listener;
+		this.textInput = v.getEmojiTextInputView();
+		this.allowEmptyText = allowEmptyText;
+	}
+
+	@Override
+	public void onTextIsEmptyChanged(boolean isEmpty) {
+		sendButton.setEnabled(enabled && (!isEmpty || canSendEmptyText()));
+		wasEmpty = isEmpty;
+	}
+
+	@Override
+	public void onSendEvent() {
+		if (canSend()) {
+			listener.onSendClick(textInput.getText(), emptyList());
+		}
+	}
+
+	protected final boolean canSend() {
+		if (textInput.isTooLong()) {
+			Snackbar.make(sendButton, R.string.text_too_long, LENGTH_SHORT)
+					.show();
+			return false;
+		}
+		return enabled && (canSendEmptyText() || !textInput.isEmpty());
+	}
+
+	protected boolean canSendEmptyText() {
+		return allowEmptyText;
+	}
+
+	@Nullable
+	public Parcelable onSaveInstanceState(@Nullable Parcelable superState) {
+		return superState;
+	}
+
+	@Nullable
+	public Parcelable onRestoreInstanceState(Parcelable state) {
+		return state;
+	}
+
+	@CallSuper
+	public void setEnabled(boolean enabled) {
+		sendButton.setEnabled(enabled && (!wasEmpty || canSendEmptyText()));
+		this.enabled = enabled;
+	}
+
+	public interface SendListener {
+		void onSendClick(@Nullable String text, List<Uri> imageUris);
+	}
+
+}

briar-android/src/main/java/org/briarproject/briar/android/viewmodel/ViewModelModule.java

@@ -4,6 +4,7 @@ import android.arch.lifecycle.ViewModel;
 import android.arch.lifecycle.ViewModelProvider;
 
 import org.briarproject.briar.android.conversation.ConversationViewModel;
+import org.briarproject.briar.android.conversation.ImageViewModel;
 
 import javax.inject.Singleton;
 
@@ -20,6 +21,12 @@ public abstract class ViewModelModule {
 	abstract ViewModel bindConversationViewModel(
 			ConversationViewModel conversationViewModel);
 
+	@Binds
+	@IntoMap
+	@ViewModelKey(ImageViewModel.class)
+	abstract ViewModel bindImageViewModel(
+			ImageViewModel imageViewModel);
+
 	@Binds
 	@Singleton
 	abstract ViewModelProvider.Factory bindViewModelFactory(

briar-android/src/main/java/org/thoughtcrime/securesms/LICENSE

@@ -1,621 +0,0 @@
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-GNU General Public License, you may choose any version ever published
-by the Free Software Foundation.
-
-  If the Program specifies that a proxy can decide which future
-versions of the GNU General Public License can be used, that proxy's
-public statement of acceptance of a version permanently authorizes you
-to choose that version for the Program.
-
-  Later license versions may give you additional or different
-permissions.  However, no additional obligations are imposed on any
-author or copyright holder as a result of your choosing to follow a
-later version.
-
-  15. Disclaimer of Warranty.
-
-  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
-APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
-HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
-OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
-THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
-PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
-IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
-ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
-
-  16. Limitation of Liability.
-
-  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
-WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
-THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
-GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
-USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
-DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
-PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
-EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
-SUCH DAMAGES.
-
-  17. Interpretation of Sections 15 and 16.
-
-  If the disclaimer of warranty and limitation of liability provided
-above cannot be given local legal effect according to their terms,
-reviewing courts shall apply local law that most closely approximates
-an absolute waiver of all civil liability in connection with the
-Program, unless a warranty or assumption of liability accompanies a
-copy of the Program in return for a fee.
-
-                     END OF TERMS AND CONDITIONS

briar-android/src/main/res/drawable/bubble_accent.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape
+	xmlns:android="http://schemas.android.com/apk/res/android"
+	android:shape="rectangle">
+
+	<corners
+		android:radius="32dp"/>
+
+	<solid
+		android:color="@color/briar_accent"/>
+
+</shape>
+

briar-android/src/main/res/drawable/ic_add_nearby.xml

@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+        android:width="24dp"
+        android:height="24dp"
+        android:viewportHeight="24.0"
+        android:viewportWidth="24.0">
+	<path
+		android:fillColor="#FFFFFFFF"
+		android:pathData="M12,11c-1.1,0 -2,0.9 -2,2s0.9,2 2,2 2,-0.9 2,-2 -0.9,-2 -2,-2zM18,13c0,-3.31 -2.69,-6 -6,-6s-6,2.69 -6,6c0,2.22 1.21,4.15 3,5.19l1,-1.74c-1.19,-0.7 -2,-1.97 -2,-3.45 0,-2.21 1.79,-4 4,-4s4,1.79 4,4c0,1.48 -0.81,2.75 -2,3.45l1,1.74c1.79,-1.04 3,-2.97 3,-5.19zM12,3C6.48,3 2,7.48 2,13c0,3.7 2.01,6.92 4.99,8.65l1,-1.73C5.61,18.53 4,15.96 4,13c0,-4.42 3.58,-8 8,-8s8,3.58 8,8c0,2.96 -1.61,5.53 -4,6.92l1,1.73c2.99,-1.73 5,-4.95 5,-8.65 0,-5.52 -4.48,-10 -10,-10z"/>
+</vector>

briar-android/src/main/res/drawable/ic_call_made.xml

@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+        android:width="24dp"
+        android:height="24dp"
+        android:viewportHeight="24.0"
+        android:viewportWidth="24.0">
+	<path
+		android:fillColor="#FF000000"
+		android:pathData="M9,5v2h6.59L4,18.59 5.41,20 17,8.41V15h2V5z"/>
+</vector>

briar-android/src/main/res/drawable/ic_call_received.xml

@@ -0,0 +1,10 @@
+<vector
+	xmlns:android="http://schemas.android.com/apk/res/android"
+	android:width="24dp"
+	android:height="24dp"
+	android:viewportHeight="24.0"
+	android:viewportWidth="24.0">
+	<path
+		android:fillColor="#FF000000"
+		android:pathData="M20,5.41L18.59,4 7,15.59V9H5v10h10v-2H8.41z"/>
+</vector>

briar-android/src/main/res/drawable/ic_content_copy.xml

@@ -0,0 +1,10 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+        android:width="24dp"
+        android:height="24dp"
+        android:tint="#2A93C6"
+        android:viewportHeight="24.0"
+        android:viewportWidth="24.0">
+	<path
+		android:fillColor="#FF000000"
+		android:pathData="M16,1L4,1c-1.1,0 -2,0.9 -2,2v14h2L4,3h12L16,1zM19,5L8,5c-1.1,0 -2,0.9 -2,2v14c0,1.1 0.9,2 2,2h11c1.1,0 2,-0.9 2,-2L21,7c0,-1.1 -0.9,-2 -2,-2zM19,21L8,21L8,7h11v14z"/>
+</vector>

briar-android/src/main/res/drawable/ic_content_paste.xml

@@ -0,0 +1,10 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+        android:width="24dp"
+        android:height="24dp"
+        android:tint="#2A93C6"
+        android:viewportHeight="24.0"
+        android:viewportWidth="24.0">
+	<path
+		android:fillColor="#FF000000"
+		android:pathData="M19,2h-4.18C14.4,0.84 13.3,0 12,0c-1.3,0 -2.4,0.84 -2.82,2L5,2c-1.1,0 -2,0.9 -2,2v16c0,1.1 0.9,2 2,2h14c1.1,0 2,-0.9 2,-2L21,4c0,-1.1 -0.9,-2 -2,-2zM12,2c0.55,0 1,0.45 1,1s-0.45,1 -1,1 -1,-0.45 -1,-1 0.45,-1 1,-1zM19,20L5,20L5,4h2v3h10L17,4h2v16z"/>
+</vector>

briar-android/src/main/res/drawable/ic_image.xml

@@ -0,0 +1,10 @@
+<vector
+	xmlns:android="http://schemas.android.com/apk/res/android"
+	android:width="24dp"
+	android:height="24dp"
+	android:viewportHeight="24.0"
+	android:viewportWidth="24.0">
+	<path
+		android:fillColor="#000000"
+		android:pathData="M21,19V5c0,-1.1 -0.9,-2 -2,-2H5c-1.1,0 -2,0.9 -2,2v14c0,1.1 0.9,2 2,2h14c1.1,0 2,-0.9 2,-2zM8.5,13.5l2.5,3.01L14.5,12l4.5,6H5l3.5,-4.5z"/>
+</vector>

briar-android/src/main/res/drawable/ic_link.xml

@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+        android:width="24dp"
+        android:height="24dp"
+        android:viewportHeight="24.0"
+        android:viewportWidth="24.0">
+	<path
+		android:fillColor="#FFFFFF"
+		android:pathData="M3.9,12c0,-1.71 1.39,-3.1 3.1,-3.1h4L11,7L7,7c-2.76,0 -5,2.24 -5,5s2.24,5 5,5h4v-1.9L7,15.1c-1.71,0 -3.1,-1.39 -3.1,-3.1zM8,13h8v-2L8,11v2zM17,7h-4v1.9h4c1.71,0 3.1,1.39 3.1,3.1s-1.39,3.1 -3.1,3.1h-4L13,17h4c2.76,0 5,-2.24 5,-5s-2.24,-5 -5,-5z"/>
+</vector>

briar-android/src/main/res/drawable/ic_link_down.xml

@@ -0,0 +1,12 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+        android:width="24dp"
+        android:height="24dp"
+        android:viewportHeight="24"
+        android:viewportWidth="24">
+	<path
+		android:fillColor="#FFFFFF"
+		android:pathData="M16,6H13V7.9H16C18.26,7.9 20.1,9.73 20.1,12A4.1,4.1 0,0 1,16 16.1H13V18H16A6,6 0,0 0,22 12C22,8.68 19.31,6 16,6M3.9,12C3.9,9.73 5.74,7.9 8,7.9H11V6H8A6,6 0,0 0,2 12A6,6 0,0 0,8 18H11V16.1H8C5.74,16.1 3.9,14.26 3.9,12M8,13H16V11H8V13Z"/>
+	<path
+		android:fillColor="#FFFFFF"
+		android:pathData="m21.6598,17.4732h-2.2959v3.0612H17.5118l3,3 3,-3h-1.852z"/>
+</vector>

briar-android/src/main/res/drawable/ic_link_menu.xml

@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+        android:width="24dp"
+        android:height="24dp"
+        android:viewportHeight="24.0"
+        android:viewportWidth="24.0">
+	<path
+		android:fillColor="#FFFFFF"
+		android:pathData="M3.9,12c0,-1.71 1.39,-3.1 3.1,-3.1h4L11,7L7,7c-2.76,0 -5,2.24 -5,5s2.24,5 5,5h4v-1.9L7,15.1c-1.71,0 -3.1,-1.39 -3.1,-3.1zM8,13h8v-2L8,11v2zM17,7h-4v1.9h4c1.71,0 3.1,1.39 3.1,3.1s-1.39,3.1 -3.1,3.1h-4L13,17h4c2.76,0 5,-2.24 5,-5s-2.24,-5 -5,-5z"/>
+</vector>

briar-android/src/main/res/drawable/ic_link_up.xml

@@ -0,0 +1,12 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+        android:width="24dp"
+        android:height="24dp"
+        android:viewportHeight="24"
+        android:viewportWidth="24">
+	<path
+		android:fillColor="#FFFFFF"
+		android:pathData="M16,6H13V7.9H16C18.26,7.9 20.1,9.73 20.1,12A4.1,4.1 0,0 1,16 16.1H13V18H16A6,6 0,0 0,22 12C22,8.68 19.31,6 16,6M3.9,12C3.9,9.73 5.74,7.9 8,7.9H11V6H8A6,6 0,0 0,2 12A6,6 0,0 0,8 18H11V16.1H8C5.74,16.1 3.9,14.26 3.9,12M8,13H16V11H8V13Z"/>
+	<path
+		android:fillColor="#FFFFFF"
+		android:pathData="M21.6598,23.5344H19.3639V20.4732H17.5118l3,-3 3,3h-1.852z"/>
+</vector>

briar-android/src/main/res/drawable/ic_nearby.xml

@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+        android:width="24dp"
+        android:height="24dp"
+        android:viewportHeight="24"
+        android:viewportWidth="24">
+	<path
+		android:fillColor="#FFFFFFFF"
+		android:pathData="M11.1731,2.4031C9.9686,2.4471 8.7753,2.713 7.6641,3.2033 8.187,3.7263 8.3967,4.1446 8.6059,4.563 11.6391,3.4125 15.0914,4.0394 17.4971,6.445c0.7322,0.7321 1.3593,1.5692 1.6731,2.5105 0.4184,-0.2092 0.9412,-0.3134 1.4642,-0.3134h0.1045C20.2158,7.387 19.483,6.3401 18.5416,5.2942 16.5283,3.2808 13.823,2.3062 11.1731,2.4031ZM5.1695,3.2316A2.7194,2.7194 0,0 0,2.4501 5.951,2.7194 2.7194,0 0,0 5.1695,8.6704 2.7194,2.7194 0,0 0,7.8889 5.951,2.7194 2.7194,0 0,0 5.1695,3.2316ZM2.5404,8.5359C0.9715,12.1966 1.7027,16.4848 4.6313,19.4134c1.8827,1.9872 4.4972,2.9301 7.0074,2.9301 2.5102,0 5.1264,-0.9428 7.0092,-2.9301 0.9413,-0.9414 1.6724,-2.091 2.1953,-3.3461h-0.1045c-0.5229,0 -1.0458,-0.1042 -1.4642,-0.3134 -0.4184,0.9414 -0.9409,1.7783 -1.6731,2.5105 -3.2423,3.2424 -8.5771,3.2424 -11.8194,0C3.2719,15.8588 2.6451,12.4064 3.7957,9.3733 3.3773,9.1641 2.9588,8.9542 2.5404,8.5359ZM11.5944,9.3804a2.9913,2.9913 0,0 0,-2.9903 2.9903,2.9913 2.9913,0 0,0 2.9903,2.992 2.9913,2.9913 0,0 0,2.992 -2.992,2.9913 2.9913,0 0,0 -2.992,-2.9903zM20.7334,9.8035a2.7194,2.7194 0,0 0,-2.7194 2.7194,2.7194 2.7194,0 0,0 2.7194,2.7194 2.7194,2.7194 0,0 0,2.7194 -2.7194,2.7194 2.7194,0 0,0 -2.7194,-2.7194z"/>
+</vector>

briar-android/src/main/res/drawable/ic_nickname.xml

@@ -0,0 +1,57 @@
+<vector
+	xmlns:android="http://schemas.android.com/apk/res/android"
+	android:width="200dp"
+	android:height="237dp"
+	android:viewportHeight="178"
+	android:viewportWidth="150">
+	<path
+		android:fillAlpha="0.25"
+		android:pathData="M85.19,0.128 L3.357,0.329C2.465,0.331 1.611,0.69 0.981,1.329 0.352,1.967 -0.001,2.832 0,3.733L0.373,156.201c0.001,0.446 0.089,0.888 0.26,1.3 0.17,0.412 0.419,0.786 0.732,1.101 0.313,0.315 0.685,0.564 1.093,0.734 0.409,0.17 0.846,0.257 1.288,0.256l81.834,-0.201c0.892,-0.003 1.746,-0.363 2.375,-1.002 0.629,-0.639 0.981,-1.504 0.98,-2.405L88.554,3.516C88.551,2.617 88.196,1.755 87.565,1.12 86.935,0.485 86.081,0.128 85.19,0.128Z">
+	</path>
+	<path
+		android:fillAlpha="0.175"
+		android:fillColor="#6d6d6d"
+		android:pathData="M84.282,-0.002 L4.276,0.196C2.574,0.2 1.198,1.598 1.202,3.318L1.567,154.298c0.004,1.72 1.387,3.111 3.089,3.107l80.006,-0.198c1.702,-0.004 3.078,-1.402 3.074,-3.122L87.37,3.105C87.366,1.385 85.983,-0.006 84.282,-0.002Z"/>
+	<path
+		android:fillAlpha="0.25"
+		android:fillColor="#646464"
+		android:pathData="M81.939,3.957L65.934,3.996C65.689,5.664 64.862,7.188 63.602,8.293C62.342,9.398 60.732,10.01 59.064,10.02L29.303,10.092C27.635,10.091 26.021,9.487 24.756,8.389C23.49,7.29 22.655,5.77 22.402,4.104L6.637,4.143C5.769,4.145 4.938,4.495 4.326,5.117C3.714,5.739 3.371,6.58 3.373,7.457L3.461,44.068L3.717,150.168C3.721,151.045 4.069,151.885 4.686,152.502C5.302,153.119 6.136,153.464 7.004,153.461L82.307,153.275C83.172,153.27 83.999,152.921 84.609,152.301C85.219,151.681 85.561,150.841 85.561,149.967L85.307,43.563L85.221,7.256C85.218,6.379 84.871,5.539 84.256,4.92C83.641,4.301 82.807,3.955 81.939,3.957zM52.652,5.791L34.357,6.068C34.108,6.072 33.908,6.279 33.912,6.531L33.916,6.83C33.92,7.082 34.125,7.285 34.375,7.281L52.672,7.002C52.921,6.998 53.119,6.791 53.115,6.539L53.111,6.24C53.108,5.988 52.902,5.787 52.652,5.791z"/>
+	<path
+		android:fillAlpha="0.25"
+		android:fillColor="#dbdbdb"
+		android:pathData="M57.204,6.934C57.602,6.928 57.919,6.597 57.913,6.195 57.907,5.793 57.58,5.471 57.182,5.477c-0.398,0.006 -0.716,0.337 -0.71,0.739 0.006,0.402 0.333,0.723 0.731,0.717z"/>
+	<path
+		android:fillAlpha="0.25"
+		android:fillColor="#e0e0e0"
+		android:pathData="m17.641,19.459c-4.185,0 -7.576,3.446 -7.576,7.695 0,4.25 3.392,7.695 7.576,7.695 4.185,0 7.576,-3.446 7.576,-7.695 0,-4.25 -3.392,-7.695 -7.576,-7.695zM37.523,23.637v3.234h40.117v-3.234zM37.523,30.104v3.234L77.641,33.338L77.641,30.104ZM17.641,44.088c-4.185,0 -7.576,3.444 -7.576,7.693 0,4.25 3.392,7.695 7.576,7.695 4.185,0 7.576,-3.446 7.576,-7.695 0,-4.25 -3.392,-7.693 -7.576,-7.693zM37.523,48.266L37.523,51.5h40.117v-3.234zM37.523,54.732v3.232L77.641,57.965L77.641,54.732ZM17.641,68.715c-4.185,0 -7.576,3.446 -7.576,7.695 0,4.25 3.392,7.695 7.576,7.695 4.185,0 7.576,-3.446 7.576,-7.695 0,-4.25 -3.392,-7.695 -7.576,-7.695zM37.523,72.895v3.232h40.117v-3.232zM37.523,79.361L37.523,82.594L77.641,82.594L77.641,79.361ZM17.641,93.344c-4.185,0 -7.576,3.446 -7.576,7.695 0,4.25 3.392,7.695 7.576,7.695 4.185,0 7.576,-3.445 7.576,-7.695 0,-4.25 -3.392,-7.695 -7.576,-7.695zM37.523,97.523v3.232h40.117v-3.232zM37.523,103.988v3.234h40.117v-3.234zM17.641,117.973c-4.185,0 -7.576,3.446 -7.576,7.695 0,4.25 3.392,7.693 7.576,7.693 4.185,0 7.576,-3.443 7.576,-7.693 0,-4.249 -3.392,-7.695 -7.576,-7.695zM37.523,122.15v3.234h40.117v-3.234zM37.523,128.617v3.234h40.117v-3.234z"/>
+	<path
+		android:fillColor="#313131"
+		android:pathData="m136.95,18.407 l-80.006,0.198c-1.702,0.004 -3.078,1.402 -3.074,3.122l0.365,150.981c0.004,1.72 1.387,3.111 3.089,3.107l80.006,-0.198c1.702,-0.004 3.078,-1.402 3.074,-3.122L140.039,21.514c-0.004,-1.72 -1.387,-3.111 -3.089,-3.107z"/>
+	<path
+		android:fillColor="#3e3e3e"
+		android:pathData="M134.609,22.357L118.6,22.395C118.356,24.062 117.528,25.587 116.268,26.691C115.008,27.796 113.398,28.408 111.73,28.418L81.969,28.492C80.301,28.491 78.689,27.886 77.424,26.787C76.158,25.689 75.323,24.168 75.07,22.502L59.305,22.541C58.437,22.543 57.604,22.894 56.992,23.516C56.38,24.137 56.037,24.98 56.039,25.857L56.129,62.469L56.748,62.467L56.129,62.471L56.383,168.57C56.385,169.447 56.733,170.287 57.348,170.906C57.963,171.524 58.796,171.871 59.664,171.869L134.967,171.684C135.835,171.682 136.665,171.331 137.277,170.709C137.889,170.088 138.232,169.246 138.23,168.369L137.973,62.219L137.975,62.219L137.889,25.656C137.887,24.779 137.541,23.939 136.926,23.32C136.311,22.702 135.477,22.356 134.609,22.357z"/>
+	<path
+		android:fillColor="#e0e0e0"
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+	<path
+		android:fillColor="#d5d6d7"
+		android:pathData="M148.744,68.665H45.619v33.583h103.125z"/>
+	<path
+		android:fillColor="#87c214"
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+		android:fillColor="#f5f5f5"
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+	<path
+		android:fillColor="#87c214"
+		android:pathData="m70.13,90.006h-6.574c-0.315,0.002 -0.625,0.082 -0.904,0.231 -0.278,0.149 -0.517,0.365 -0.696,0.627 1.477,0.856 3.147,1.311 4.85,1.321 1.702,0.01 3.378,-0.427 4.864,-1.266 -0.167,-0.265 -0.393,-0.486 -0.661,-0.645 -0.268,-0.159 -0.569,-0.251 -0.879,-0.269z"/>
+	<path
+		android:fillColor="#333333"
+		android:pathData="m66.861,80.746c-2.08,0 -3.766,1.704 -3.766,3.807 0,0.394 0.076,0.766 0.186,1.123 -0.328,0.813 -0.822,1.878 -1.158,1.709 0,0 5.07,4.425 9.545,0 -0.355,-0.613 -0.773,-1.184 -1.219,-1.732 0.105,-0.35 0.178,-0.715 0.178,-1.1 0,-2.102 -1.686,-3.807 -3.766,-3.807z"/>
+	<path
+		android:fillColor="#fda57d"
+		android:pathData="m66.861,81.57c-1.801,0 -3.302,1.279 -3.674,2.986 -0.005,-0 -0.009,-0.006 -0.014,-0.006 -0.193,0 -0.35,0.297 -0.35,0.664 0,0.347 0.142,0.623 0.32,0.652 0.181,1.408 1.109,2.569 2.381,3.059v0.732c0,0.323 0.127,0.635 0.354,0.863 0.226,0.229 0.534,0.357 0.854,0.357h0.225c0.159,0 0.316,-0.032 0.463,-0.094 0.147,-0.061 0.28,-0.15 0.393,-0.264 0.112,-0.113 0.201,-0.248 0.262,-0.396 0.061,-0.148 0.092,-0.308 0.092,-0.469v-0.721c1.289,-0.484 2.232,-1.655 2.412,-3.076 0.168,-0.049 0.299,-0.312 0.299,-0.645 0,-0.363 -0.153,-0.656 -0.344,-0.662 -0.373,-1.705 -1.873,-2.982 -3.672,-2.982z"/>
+	<path
+		android:fillColor="#333333"
+		android:pathData="m63.253,83.934h7.179c0,0 -0.612,-2.93 -3.328,-2.74 -2.715,0.19 -3.852,2.74 -3.852,2.74z"/>
+</vector>

briar-android/src/main/res/drawable/ic_person.xml

@@ -0,0 +1,5 @@
+<vector android:height="24dp" android:tint="#FFFFFF"
+    android:viewportHeight="24.0" android:viewportWidth="24.0"
+    android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="#FF000000" android:pathData="M12,12c2.21,0 4,-1.79 4,-4s-1.79,-4 -4,-4 -4,1.79 -4,4 1.79,4 4,4zM12,14c-2.67,0 -8,1.34 -8,4v2h16v-2c0,-2.66 -5.33,-4 -8,-4z"/>
+</vector>

briar-android/src/main/res/drawable/ic_person_add.xml

@@ -0,0 +1,5 @@
+<vector android:height="24dp" android:tint="#FFFFFF"
+    android:viewportHeight="24.0" android:viewportWidth="24.0"
+    android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="#FF000000" android:pathData="M15,12c2.21,0 4,-1.79 4,-4s-1.79,-4 -4,-4 -4,1.79 -4,4 1.79,4 4,4zM6,10L6,7L4,7v3L1,10v2h3v3h2v-3h3v-2L6,10zM15,14c-2.67,0 -8,1.34 -8,4v2h16v-2c0,-2.66 -5.33,-4 -8,-4z"/>
+</vector>

briar-android/src/main/res/drawable/ic_qr_code.xml

@@ -0,0 +1,10 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+        android:width="24dp"
+        android:height="24dp"
+        android:tint="#2A93C6"
+        android:viewportHeight="24"
+        android:viewportWidth="24">
+	<path
+		android:fillColor="#FFFFFFFF"
+		android:pathData="M3,11H5V13H3V11M11,5H13V9H11V5M9,11H13V15H11V13H9V11M15,11H17V13H19V11H21V13H19V15H21V19H19V21H17V19H13V21H11V17H15V15H17V13H15V11M19,19V15H17V19H19M15,3H21V9H15V3M17,5V7H19V5H17M3,3H9V9H3V3M5,5V7H7V5H5M3,15H9V21H3V15M5,17V19H7V17H5Z"/>
+</vector>

briar-android/src/main/res/drawable/ic_qr_code_scan.xml

@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+        android:width="24dp"
+        android:height="24dp"
+        android:viewportHeight="24"
+        android:viewportWidth="24">
+	<path
+		android:fillColor="#FFFFFF"
+		android:pathData="M4,4H10V10H4V4M20,4V10H14V4H20M14,15H16V13H14V11H16V13H18V11H20V13H18V15H20V18H18V20H16V18H13V20H11V16H14V15M16,15V18H18V15H16M4,20V14H10V20H4M6,6V8H8V6H6M16,6V8H18V6H16M6,16V18H8V16H6M4,11H6V13H4V11M9,11H13V15H11V13H9V11M11,6H13V10H11V6M2,2V6H0V2A2,2 0 0,1 2,0H6V2H2M22,0A2,2 0 0,1 24,2V6H22V2H18V0H22M2,18V22H6V24H2A2,2 0 0,1 0,22V18H2M22,22V18H24V22A2,2 0 0,1 22,24H18V22H22Z"/>
+</vector>

briar-android/src/main/res/drawable/ic_security.xml

@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+        android:width="24dp"
+        android:height="24dp"
+        android:viewportWidth="24.0"
+        android:viewportHeight="24.0">
+    <path
+        android:fillColor="#FF000000"
+        android:pathData="M12,1L3,5v6c0,5.55 3.84,10.74 9,12 5.16,-1.26 9,-6.45 9,-12L21,5l-9,-4zM12,11.99h7c-0.53,4.12 -3.28,7.79 -7,8.94L12,12L5,12L5,6.3l7,-3.11v8.8z"/>
+</vector>

briar-android/src/main/res/drawable/social_share_blue.xml

@@ -0,0 +1,10 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+        android:width="24dp"
+        android:height="24dp"
+        android:tint="#2A93C6"
+        android:viewportHeight="24.0"
+        android:viewportWidth="24.0">
+	<path
+		android:fillColor="#FFFFFFFF"
+		android:pathData="M18,16.08c-0.76,0 -1.44,0.3 -1.96,0.77L8.91,12.7c0.05,-0.23 0.09,-0.46 0.09,-0.7s-0.04,-0.47 -0.09,-0.7l7.05,-4.11c0.54,0.5 1.25,0.81 2.04,0.81 1.66,0 3,-1.34 3,-3s-1.34,-3 -3,-3 -3,1.34 -3,3c0,0.24 0.04,0.47 0.09,0.7L8.04,9.81C7.5,9.31 6.79,9 6,9c-1.66,0 -3,1.34 -3,3s1.34,3 3,3c0.79,0 1.5,-0.31 2.04,-0.81l7.12,4.16c-0.05,0.21 -0.08,0.43 -0.08,0.65 0,1.61 1.31,2.92 2.92,2.92 1.61,0 2.92,-1.31 2.92,-2.92s-1.31,-2.92 -2.92,-2.92z"/>
+</vector>

briar-android/src/main/res/layout/activity_conversation.xml

@@ -5,6 +5,7 @@
 	xmlns:tools="http://schemas.android.com/tools"
 	android:layout_width="match_parent"
 	android:layout_height="match_parent"
+	android:animateLayoutChanges="true"
 	android:orientation="vertical"
 	tools:context=".android.conversation.ConversationActivity">
 
@@ -32,9 +33,9 @@
 					android:layout_height="match_parent"
 					android:layout_marginLeft="@dimen/margin_medium"
 					android:layout_marginStart="@dimen/margin_medium"
+					android:ellipsize="end"
 					android:gravity="center"
 					android:maxLines="1"
-					android:ellipsize="end"
 					android:textColor="@color/action_bar_text"
 					tools:text="Contact Name of someone who chose a long name"/>
 
@@ -48,7 +49,15 @@
 		android:id="@+id/conversationView"
 		android:layout_width="match_parent"
 		android:layout_height="0dp"
-		android:layout_weight="1"/>
+		android:layout_weight="2"/>
+
+	<org.briarproject.briar.android.view.ImagePreview
+		android:id="@+id/imagePreview"
+		android:layout_width="match_parent"
+		android:layout_height="0dp"
+		android:layout_weight="1"
+		android:visibility="gone"
+		tools:visibility="visible"/>
 
 	<org.briarproject.briar.android.view.TextInputView
 		android:id="@+id/text_input_container"

briar-android/src/main/res/layout/emoji_text_input_view.xml

@@ -0,0 +1,34 @@
+<?xml version="1.0" encoding="utf-8"?>
+<merge
+	xmlns:android="http://schemas.android.com/apk/res/android"
+	xmlns:app="http://schemas.android.com/apk/res-auto"
+	xmlns:tools="http://schemas.android.com/tools"
+	android:layout_width="match_parent"
+	android:layout_height="match_parent"
+	android:orientation="horizontal"
+	tools:parentTag="org.briarproject.briar.android.view.KeyboardAwareLinearLayout"
+	tools:showIn="@layout/fragment_reblog">
+
+	<android.support.v7.widget.AppCompatImageButton
+		android:id="@+id/emoji_toggle"
+		android:layout_width="@dimen/text_input_height"
+		android:layout_height="@dimen/text_input_height"
+		android:layout_gravity="bottom"
+		android:background="?attr/selectableItemBackground"
+		android:padding="@dimen/margin_small"
+		android:scaleType="center"
+		android:src="@drawable/ic_emoji_toggle"
+		app:tint="?attr/colorControlNormal"/>
+
+	<com.vanniktech.emoji.EmojiEditText
+		android:id="@+id/input_text"
+		android:layout_width="match_parent"
+		android:layout_height="wrap_content"
+		android:layout_gravity="bottom"
+		android:background="@android:color/transparent"
+		android:inputType="textMultiLine|textCapSentences|textAutoCorrect"
+		android:minHeight="@dimen/text_input_height"
+		android:textColor="?android:attr/textColorPrimary"
+		tools:text="Line 1\nLine 2\nLine 3"/>
+
+</merge>

briar-android/src/main/res/layout/fragment_contact_alias_input.xml

@@ -0,0 +1,37 @@
+<?xml version="1.0" encoding="utf-8"?>
+<android.support.constraint.ConstraintLayout
+	xmlns:android="http://schemas.android.com/apk/res/android"
+	xmlns:app="http://schemas.android.com/apk/res-auto"
+	xmlns:tools="http://schemas.android.com/tools"
+	android:layout_width="match_parent"
+	android:layout_height="match_parent">
+
+	<EditText
+		android:id="@+id/contactNameInput"
+		android:layout_width="0dp"
+		android:layout_height="wrap_content"
+		android:layout_margin="@dimen/margin_large"
+		android:hint="@string/contact_name_hint"
+		android:importantForAutofill="no"
+		android:inputType="text|textCapWords"
+		app:layout_constraintBottom_toTopOf="@id/linkInput"
+		app:layout_constraintEnd_toEndOf="parent"
+		app:layout_constraintStart_toStartOf="parent"
+		app:layout_constraintTop_toTopOf="parent"
+		app:layout_constraintVertical_chainStyle="packed"/>
+
+	<Button
+		android:id="@+id/addButton"
+		style="@style/BriarButton"
+		android:layout_width="match_parent"
+		android:layout_height="wrap_content"
+		android:layout_margin="@dimen/margin_large"
+		android:layout_marginTop="8dp"
+		android:enabled="false"
+		android:text="@string/add_contact_button"
+		app:layout_constraintEnd_toEndOf="parent"
+		app:layout_constraintStart_toStartOf="parent"
+		app:layout_constraintTop_toBottomOf="@+id/contactNameInput"
+		tools:enabled="true"/>
+
+</android.support.constraint.ConstraintLayout>

briar-android/src/main/res/layout/fragment_contact_choose_nickname.xml

@@ -0,0 +1,157 @@
+<?xml version="1.0" encoding="utf-8"?>
+<ScrollView
+	xmlns:android="http://schemas.android.com/apk/res/android"
+	xmlns:app="http://schemas.android.com/apk/res-auto"
+	xmlns:tools="http://schemas.android.com/tools"
+	android:layout_width="match_parent"
+	android:layout_height="match_parent"
+	android:fillViewport="true">
+
+	<android.support.constraint.ConstraintLayout
+		android:layout_width="match_parent"
+		android:layout_height="wrap_content"
+		android:padding="@dimen/margin_large">
+
+		<ImageView
+			android:id="@+id/imageView"
+			android:layout_width="wrap_content"
+			android:layout_height="wrap_content"
+			android:layout_marginTop="8dp"
+			android:src="@drawable/ic_nickname"
+			app:layout_constraintEnd_toEndOf="parent"
+			app:layout_constraintStart_toStartOf="parent"
+			app:layout_constraintTop_toTopOf="parent"
+			tools:ignore="ContentDescription"/>
+
+		<android.support.v7.widget.AppCompatImageView
+			android:id="@+id/nicknameIcon"
+			android:layout_width="38dp"
+			android:layout_height="38dp"
+			android:layout_marginTop="16dp"
+			android:background="@drawable/bubble_accent"
+			android:scaleType="center"
+			android:src="@drawable/ic_person"
+			app:layout_constraintBottom_toTopOf="@+id/contactNameLayout"
+			app:layout_constraintStart_toStartOf="parent"
+			app:layout_constraintTop_toBottomOf="@+id/imageView"
+			app:layout_constraintVertical_chainStyle="packed"
+			app:tint="@color/briar_white"/>
+
+		<TextView
+			android:id="@+id/nicknameIntro"
+			android:layout_width="0dp"
+			android:layout_height="wrap_content"
+			android:layout_marginLeft="8dp"
+			android:layout_marginStart="8dp"
+			android:gravity="left|start"
+			android:text="@string/nickname_intro"
+			android:textSize="16sp"
+			app:layout_constraintBottom_toBottomOf="@+id/nicknameIcon"
+			app:layout_constraintEnd_toEndOf="parent"
+			app:layout_constraintHorizontal_bias="0.5"
+			app:layout_constraintStart_toEndOf="@+id/nicknameIcon"
+			app:layout_constraintTop_toTopOf="@+id/nicknameIcon"/>
+
+		<android.support.design.widget.TextInputLayout
+			android:id="@+id/contactNameLayout"
+			android:layout_width="0dp"
+			android:layout_height="wrap_content"
+			android:layout_marginTop="16dp"
+			app:errorEnabled="true"
+			app:hintEnabled="false"
+			app:layout_constraintBottom_toTopOf="@+id/stepOne"
+			app:layout_constraintEnd_toEndOf="parent"
+			app:layout_constraintHorizontal_bias="0.5"
+			app:layout_constraintStart_toStartOf="parent"
+			app:layout_constraintTop_toBottomOf="@+id/nicknameIcon">
+
+			<android.support.design.widget.TextInputEditText
+				android:id="@+id/contactNameInput"
+				android:layout_width="match_parent"
+				android:layout_height="match_parent"
+				android:hint="@string/add_contact_choose_a_nickname"
+				android:importantForAutofill="no"
+				android:inputType="text|textCapWords"/>
+
+		</android.support.design.widget.TextInputLayout>
+
+		<android.support.constraint.Guideline
+			android:id="@+id/guideline"
+			android:layout_width="wrap_content"
+			android:layout_height="wrap_content"
+			android:orientation="vertical"
+			app:layout_constraintGuide_percent="0.5"/>
+
+
+		<android.support.v7.widget.AppCompatImageView
+			android:id="@+id/stepOne"
+			android:layout_width="28dp"
+			android:layout_height="28dp"
+			android:layout_marginBottom="8dp"
+			android:layout_marginTop="16dp"
+			android:background="@drawable/bubble_accent"
+			android:gravity="center"
+			android:scaleType="center"
+			android:src="@drawable/ic_check_white"
+			android:textColor="@color/briar_white"
+			android:textSize="18sp"
+			app:layout_constraintBottom_toTopOf="@+id/stepOneText"
+			app:layout_constraintEnd_toStartOf="@+id/guideline"
+			app:layout_constraintStart_toStartOf="parent"/>
+
+		<TextView
+			android:id="@+id/stepOneText"
+			android:layout_width="wrap_content"
+			android:layout_height="wrap_content"
+			android:layout_margin="8dp"
+			android:text="@string/send_link_title"
+			app:layout_constraintBottom_toTopOf="@+id/addButton"
+			app:layout_constraintEnd_toStartOf="@+id/guideline"
+			app:layout_constraintStart_toStartOf="parent"/>
+
+		<View
+			android:id="@+id/stepConnector"
+			android:layout_width="0dp"
+			android:layout_height="1dp"
+			android:layout_margin="16dp"
+			android:background="@color/briar_accent"
+			app:layout_constraintBottom_toBottomOf="@+id/stepOne"
+			app:layout_constraintEnd_toStartOf="@+id/stepTwo"
+			app:layout_constraintStart_toEndOf="@+id/stepOne"
+			app:layout_constraintTop_toTopOf="@+id/stepOne"/>
+
+		<TextView
+			android:id="@+id/stepTwo"
+			android:layout_width="28dp"
+			android:layout_height="28dp"
+			android:background="@drawable/bubble_accent"
+			android:gravity="center"
+			android:text="2"
+			android:textColor="@color/private_message_date_inverse"
+			android:textSize="18sp"
+			app:layout_constraintEnd_toEndOf="parent"
+			app:layout_constraintStart_toStartOf="@+id/guideline"
+			app:layout_constraintTop_toTopOf="@+id/stepOne"/>
+
+		<TextView
+			android:id="@+id/stepTwoText"
+			android:layout_width="wrap_content"
+			android:layout_height="wrap_content"
+			android:text="@string/add_contact_choose_nickname"
+			app:layout_constraintBottom_toTopOf="@+id/addButton"
+			app:layout_constraintEnd_toEndOf="parent"
+			app:layout_constraintStart_toEndOf="@+id/guideline"
+			app:layout_constraintTop_toBottomOf="@+id/stepTwo"/>
+
+		<Button
+			android:id="@+id/addButton"
+			style="@style/BriarButton"
+			android:layout_width="match_parent"
+			android:layout_height="wrap_content"
+			android:text="@string/add_contact_button"
+			app:layout_constraintBottom_toBottomOf="parent"
+			app:layout_constraintEnd_toEndOf="parent"
+			app:layout_constraintStart_toStartOf="parent"/>
+
+	</android.support.constraint.ConstraintLayout>
+</ScrollView>

briar-android/src/main/res/layout/fragment_contact_link_exchange.xml

@@ -0,0 +1,278 @@
+<?xml version="1.0" encoding="utf-8"?>
+<ScrollView
+	xmlns:android="http://schemas.android.com/apk/res/android"
+	xmlns:app="http://schemas.android.com/apk/res-auto"
+	xmlns:tools="http://schemas.android.com/tools"
+	android:layout_width="match_parent"
+	android:layout_height="match_parent"
+	android:fillViewport="true">
+
+	<android.support.constraint.ConstraintLayout
+		android:layout_width="match_parent"
+		android:layout_height="wrap_content"
+		android:padding="@dimen/margin_large">
+
+		<android.support.v7.widget.AppCompatImageView
+			android:id="@+id/yourLinkIcon"
+			android:layout_width="38dp"
+			android:layout_height="38dp"
+			android:layout_marginTop="8dp"
+			android:background="@drawable/bubble_accent"
+			android:scaleType="center"
+			android:src="@drawable/ic_call_made"
+			app:layout_constraintStart_toStartOf="parent"
+			app:layout_constraintTop_toTopOf="parent"
+			app:tint="@color/briar_white"/>
+
+		<TextView
+			android:id="@+id/yourLink"
+			android:layout_width="0dp"
+			android:layout_height="wrap_content"
+			android:layout_marginLeft="8dp"
+			android:layout_marginStart="8dp"
+			android:gravity="left|start"
+			android:text="@string/your_link"
+			android:textSize="16sp"
+			app:layout_constraintBottom_toBottomOf="@+id/yourLinkIcon"
+			app:layout_constraintEnd_toEndOf="parent"
+			app:layout_constraintStart_toEndOf="@+id/yourLinkIcon"
+			app:layout_constraintTop_toTopOf="@+id/yourLinkIcon"/>
+
+		<TextView
+			android:id="@+id/linkView"
+			android:layout_width="0dp"
+			android:layout_height="wrap_content"
+			android:layout_marginTop="16dp"
+			android:background="@color/briar_white"
+			android:padding="8dp"
+			android:textColor="@color/briar_primary"
+			android:textIsSelectable="true"
+			android:textSize="18sp"
+			android:typeface="monospace"
+			app:layout_constraintEnd_toEndOf="parent"
+			app:layout_constraintStart_toStartOf="parent"
+			app:layout_constraintTop_toBottomOf="@+id/yourLinkIcon"
+			tools:text="briar://scnsdflamslkfjgluoblmksdfbwevlewajfdlkjewwhqliafskfjhskdjhvoieiv"/>
+
+		<Button
+			android:id="@+id/shareButton"
+			style="@style/BriarButtonFlat.Positive.Tiny"
+			android:layout_width="wrap_content"
+			android:layout_height="wrap_content"
+			android:drawableLeft="@drawable/social_share_blue"
+			android:drawablePadding="8dp"
+			android:drawableStart="@drawable/social_share_blue"
+			android:text="@string/share_button"
+			app:layout_constraintBottom_toBottomOf="@id/copyButton"
+			app:layout_constraintEnd_toStartOf="@id/showCodeButton"
+			app:layout_constraintStart_toEndOf="@id/copyButton"
+			app:layout_constraintTop_toTopOf="@id/copyButton"/>
+
+		<Button
+			android:id="@+id/copyButton"
+			style="@style/BriarButtonFlat.Positive.Tiny"
+			android:layout_width="wrap_content"
+			android:layout_height="wrap_content"
+			android:layout_marginTop="8dp"
+			android:drawableLeft="@drawable/ic_content_copy"
+			android:drawablePadding="8dp"
+			android:drawableStart="@drawable/ic_content_copy"
+			android:text="@string/copy_button"
+			app:layout_constraintEnd_toStartOf="@id/shareButton"
+			app:layout_constraintHorizontal_bias="1.0"
+			app:layout_constraintHorizontal_chainStyle="packed"
+			app:layout_constraintStart_toStartOf="parent"
+			app:layout_constraintTop_toBottomOf="@+id/linkView"/>
+
+		<Button
+			android:id="@+id/showCodeButton"
+			style="@style/BriarButtonFlat.Positive.Tiny"
+			android:layout_width="wrap_content"
+			android:layout_height="wrap_content"
+			android:drawableLeft="@drawable/ic_qr_code"
+			android:drawablePadding="8dp"
+			android:drawableStart="@drawable/ic_qr_code"
+			android:drawableTint="@color/briar_button_text_positive"
+			android:text="@string/show_qr_code_button"
+			android:visibility="gone"
+			app:layout_constraintBottom_toBottomOf="@id/copyButton"
+			app:layout_constraintEnd_toEndOf="parent"
+			app:layout_constraintStart_toEndOf="@id/shareButton"
+			app:layout_constraintTop_toTopOf="@id/copyButton"
+			tools:visibility="gone"/>
+
+		<android.support.v7.widget.AppCompatImageView
+			android:id="@+id/linkInputIcon"
+			android:layout_width="38dp"
+			android:layout_height="38dp"
+			android:layout_marginTop="24dp"
+			android:background="@drawable/bubble_accent"
+			android:scaleType="center"
+			android:src="@drawable/ic_call_received"
+			app:layout_constraintStart_toStartOf="parent"
+			app:layout_constraintTop_toBottomOf="@+id/copyButton"
+			app:tint="@color/briar_white"/>
+
+		<TextView
+			android:id="@+id/inputLink"
+			android:layout_width="0dp"
+			android:layout_height="wrap_content"
+			android:layout_marginLeft="8dp"
+			android:layout_marginStart="8dp"
+			android:gravity="left|start"
+			android:text="@string/contact_link_intro"
+			android:textSize="16sp"
+			app:layout_constraintBottom_toBottomOf="@+id/linkInputIcon"
+			app:layout_constraintEnd_toEndOf="parent"
+			app:layout_constraintStart_toEndOf="@+id/linkInputIcon"
+			app:layout_constraintTop_toTopOf="@+id/linkInputIcon"/>
+
+		<android.support.design.widget.TextInputLayout
+			android:id="@+id/linkInputLayout"
+			android:layout_width="0dp"
+			android:layout_height="wrap_content"
+			android:layout_marginTop="8dp"
+			app:errorEnabled="true"
+			app:hintEnabled="false"
+			app:layout_constraintEnd_toStartOf="@+id/pasteButton"
+			app:layout_constraintStart_toStartOf="parent"
+			app:layout_constraintTop_toBottomOf="@+id/linkInputIcon">
+
+			<android.support.design.widget.TextInputEditText
+				android:id="@+id/linkInput"
+				android:layout_width="match_parent"
+				android:layout_height="match_parent"
+				android:hint="@string/contact_link_hint"
+				android:importantForAutofill="no"
+				android:inputType="textUri"/>
+
+		</android.support.design.widget.TextInputLayout>
+
+		<android.support.v7.widget.AppCompatImageButton
+			android:id="@+id/pasteButton"
+			style="@style/BriarButtonFlat.Positive.Tiny"
+			android:layout_width="wrap_content"
+			android:layout_height="wrap_content"
+			android:src="@drawable/ic_content_paste"
+			app:layout_constraintBottom_toBottomOf="@+id/linkInputLayout"
+			app:layout_constraintEnd_toEndOf="parent"
+			app:layout_constraintStart_toEndOf="@+id/linkInputLayout"
+			app:layout_constraintTop_toTopOf="@+id/linkInputLayout"
+			app:layout_constraintVertical_bias="0.0"/>
+
+		<Button
+			android:id="@+id/scanCodeButton"
+			style="@style/BriarButtonFlat.Positive.Tiny"
+			android:layout_width="wrap_content"
+			android:layout_height="wrap_content"
+			android:drawableLeft="@drawable/ic_qr_code"
+			android:drawablePadding="8dp"
+			android:drawableStart="@drawable/ic_qr_code"
+			android:text="@string/scan_qr_code_button"
+			android:visibility="gone"
+			app:layout_constraintEnd_toEndOf="parent"
+			app:layout_constraintHorizontal_bias="0.5"
+			app:layout_constraintStart_toEndOf="@id/pasteButton"
+			app:layout_constraintTop_toTopOf="@+id/pasteButton"
+			tools:visibility="gone"/>
+
+		<android.support.constraint.Guideline
+			android:id="@+id/guideline"
+			android:layout_width="wrap_content"
+			android:layout_height="wrap_content"
+			android:orientation="vertical"
+			app:layout_constraintGuide_percent="0.5"/>
+
+
+		<TextView
+			android:id="@+id/stepOne"
+			android:layout_width="28dp"
+			android:layout_height="28dp"
+			android:layout_marginTop="16dp"
+			android:background="@drawable/bubble_accent"
+			android:gravity="center"
+			android:text="1"
+			android:textColor="@color/briar_white"
+			android:textSize="18sp"
+			app:layout_constraintBottom_toTopOf="@+id/stepOneText"
+			app:layout_constraintEnd_toStartOf="@+id/guideline"
+			app:layout_constraintStart_toStartOf="parent"
+			app:layout_constraintTop_toBottomOf="@+id/linkInputLayout"
+			app:layout_constraintVertical_bias="1.0"
+			app:layout_constraintVertical_chainStyle="packed"/>
+
+		<TextView
+			android:id="@+id/stepOneText"
+			android:layout_width="wrap_content"
+			android:layout_height="wrap_content"
+			android:layout_marginBottom="8dp"
+			android:layout_marginEnd="8dp"
+			android:layout_marginLeft="8dp"
+			android:layout_marginRight="8dp"
+			android:layout_marginStart="8dp"
+			android:layout_marginTop="8dp"
+			android:text="@string/send_link_title"
+			app:layout_constraintBottom_toTopOf="@+id/addButton"
+			app:layout_constraintEnd_toStartOf="@+id/guideline"
+			app:layout_constraintHorizontal_bias="0.5"
+			app:layout_constraintStart_toStartOf="parent"
+			app:layout_constraintTop_toBottomOf="@+id/stepOne"/>
+
+		<View
+			android:id="@+id/stepConnector"
+			android:layout_width="0dp"
+			android:layout_height="1dp"
+			android:layout_margin="16dp"
+			android:alpha="0.5"
+			android:background="@color/briar_accent"
+			app:layout_constraintBottom_toBottomOf="@+id/stepOne"
+			app:layout_constraintEnd_toStartOf="@+id/stepTwo"
+			app:layout_constraintStart_toEndOf="@+id/stepOne"
+			app:layout_constraintTop_toTopOf="@+id/stepOne"/>
+
+		<TextView
+			android:id="@+id/stepTwo"
+			android:layout_width="28dp"
+			android:layout_height="28dp"
+			android:alpha="0.5"
+			android:background="@drawable/bubble_accent"
+			android:gravity="center"
+			android:text="2"
+			android:textColor="@color/private_message_date_inverse"
+			android:textSize="18sp"
+			app:layout_constraintEnd_toEndOf="parent"
+			app:layout_constraintStart_toStartOf="@+id/guideline"
+			app:layout_constraintTop_toTopOf="@+id/stepOne"/>
+
+		<TextView
+			android:id="@+id/stepTwoText"
+			android:layout_width="wrap_content"
+			android:layout_height="wrap_content"
+			android:layout_marginBottom="8dp"
+			android:layout_marginEnd="8dp"
+			android:layout_marginLeft="8dp"
+			android:layout_marginRight="8dp"
+			android:layout_marginStart="8dp"
+			android:layout_marginTop="8dp"
+			android:text="@string/add_contact_choose_nickname"
+			app:layout_constraintBottom_toTopOf="@+id/addButton"
+			app:layout_constraintEnd_toEndOf="parent"
+			app:layout_constraintHorizontal_bias="0.5"
+			app:layout_constraintStart_toEndOf="@+id/guideline"
+			app:layout_constraintTop_toBottomOf="@+id/stepTwo"/>
+
+		<Button
+			android:id="@+id/addButton"
+			style="@style/BriarButton"
+			android:layout_width="match_parent"
+			android:layout_height="wrap_content"
+			android:text="@string/continue_button"
+			app:layout_constraintBottom_toBottomOf="parent"
+			app:layout_constraintEnd_toEndOf="parent"
+			app:layout_constraintHorizontal_bias="0.5"
+			app:layout_constraintStart_toStartOf="parent"
+			app:layout_constraintTop_toBottomOf="@+id/stepOneText"/>
+
+
+	</android.support.constraint.ConstraintLayout>
+</ScrollView>

briar-android/src/main/res/layout/fragment_contact_link_input.xml

@@ -0,0 +1,95 @@
+<?xml version="1.0" encoding="utf-8"?>
+<android.support.constraint.ConstraintLayout
+	xmlns:android="http://schemas.android.com/apk/res/android"
+	xmlns:app="http://schemas.android.com/apk/res-auto"
+	xmlns:tools="http://schemas.android.com/tools"
+	android:layout_width="match_parent"
+	android:layout_height="match_parent">
+
+	<EditText
+		android:id="@+id/contactNameInput"
+		android:layout_width="0dp"
+		android:layout_height="wrap_content"
+		android:layout_margin="@dimen/margin_large"
+		android:drawableLeft="@drawable/ic_person"
+		android:drawablePadding="8dp"
+		android:drawableTint="?attr/colorControlNormal"
+		android:hint="@string/contact_name_hint"
+		android:importantForAutofill="no"
+		android:inputType="text|textCapWords"
+		app:layout_constraintBottom_toTopOf="@id/linkInput"
+		app:layout_constraintEnd_toEndOf="parent"
+		app:layout_constraintStart_toStartOf="parent"
+		app:layout_constraintTop_toTopOf="parent"
+		app:layout_constraintVertical_chainStyle="packed"
+		android:drawableStart="@drawable/ic_person"/>
+
+	<EditText
+		android:id="@+id/linkInput"
+		android:layout_width="0dp"
+		android:layout_height="wrap_content"
+		android:layout_marginEnd="8dp"
+		android:layout_marginLeft="@dimen/margin_large"
+		android:layout_marginRight="8dp"
+		android:layout_marginStart="@dimen/margin_large"
+		android:layout_marginTop="16dp"
+		android:drawableLeft="@drawable/ic_link"
+		android:drawablePadding="8dp"
+		android:drawableTint="?attr/colorControlNormal"
+		android:hint="@string/contact_link_hint"
+		android:importantForAutofill="no"
+		android:inputType="textUri"
+		app:layout_constraintEnd_toEndOf="parent"
+		app:layout_constraintStart_toStartOf="parent"
+		app:layout_constraintTop_toBottomOf="@id/contactNameInput"/>
+
+	<Button
+		android:id="@+id/pasteButton"
+		style="@style/BriarButtonFlat.Positive"
+		android:layout_width="wrap_content"
+		android:layout_height="wrap_content"
+		android:layout_marginLeft="8dp"
+		android:layout_marginStart="8dp"
+		android:layout_marginTop="8dp"
+		android:drawableLeft="@drawable/ic_content_paste"
+		android:drawablePadding="8dp"
+		android:text="@string/paste_button"
+		app:layout_constraintEnd_toStartOf="@+id/scanCodeButton"
+		app:layout_constraintHorizontal_bias="0.5"
+		app:layout_constraintHorizontal_chainStyle="spread"
+		app:layout_constraintStart_toStartOf="parent"
+		app:layout_constraintTop_toBottomOf="@+id/linkInput"/>
+
+	<Button
+		android:id="@+id/scanCodeButton"
+		style="@style/BriarButtonFlat.Positive"
+		android:layout_width="wrap_content"
+		android:layout_height="wrap_content"
+		android:layout_marginEnd="8dp"
+		android:layout_marginLeft="8dp"
+		android:layout_marginStart="8dp"
+		android:layout_marginTop="8dp"
+		android:drawableLeft="@drawable/ic_qr_code"
+		android:drawablePadding="8dp"
+		android:text="Scan Code"
+		app:layout_constraintEnd_toEndOf="parent"
+		app:layout_constraintHorizontal_bias="0.5"
+		app:layout_constraintStart_toEndOf="@+id/pasteButton"
+		app:layout_constraintTop_toBottomOf="@+id/linkInput"/>
+
+	<Button
+		android:id="@+id/addButton"
+		style="@style/BriarButton"
+		android:layout_width="match_parent"
+		android:layout_height="wrap_content"
+		android:layout_margin="@dimen/margin_large"
+		android:layout_marginTop="8dp"
+		android:enabled="false"
+		android:text="@string/add_contact_button"
+		app:layout_constraintEnd_toEndOf="parent"
+		app:layout_constraintHorizontal_bias="0.75"
+		app:layout_constraintStart_toStartOf="parent"
+		app:layout_constraintTop_toBottomOf="@+id/pasteButton"
+		tools:enabled="true"/>
+
+</android.support.constraint.ConstraintLayout>

briar-android/src/main/res/layout/fragment_contact_link_output.xml

@@ -0,0 +1,87 @@
+<?xml version="1.0" encoding="utf-8"?>
+<android.support.constraint.ConstraintLayout
+	xmlns:android="http://schemas.android.com/apk/res/android"
+	xmlns:app="http://schemas.android.com/apk/res-auto"
+	xmlns:tools="http://schemas.android.com/tools"
+	android:layout_width="match_parent"
+	android:layout_height="match_parent">
+
+	<TextView
+		android:id="@+id/linkIntro"
+		android:layout_width="0dp"
+		android:layout_height="wrap_content"
+		android:layout_margin="@dimen/margin_large"
+		android:text="@string/your_link"
+		android:textIsSelectable="true"
+		android:textSize="18sp"
+		app:layout_constraintBottom_toTopOf="@id/linkView"
+		app:layout_constraintEnd_toEndOf="parent"
+		app:layout_constraintStart_toStartOf="parent"
+		app:layout_constraintTop_toTopOf="parent"
+		app:layout_constraintVertical_chainStyle="packed"/>
+
+	<TextView
+		android:id="@+id/linkView"
+		android:layout_width="0dp"
+		android:layout_height="wrap_content"
+		android:layout_marginEnd="@dimen/margin_large"
+		android:layout_marginLeft="@dimen/margin_large"
+		android:layout_marginRight="@dimen/margin_large"
+		android:layout_marginStart="@dimen/margin_large"
+		android:background="@color/briar_white"
+		android:padding="8dp"
+		android:textColor="@color/briar_primary"
+		android:textIsSelectable="true"
+		android:textSize="18sp"
+		android:typeface="monospace"
+		app:layout_constraintBottom_toTopOf="@+id/copyButton"
+		app:layout_constraintEnd_toEndOf="parent"
+		app:layout_constraintStart_toStartOf="parent"
+		app:layout_constraintTop_toBottomOf="@id/linkIntro"
+		tools:text="briar://scnsdflamslkfjgluoblmksdfbwevlewajfdlkjewwhqliafskfjhskdjhvoieiv"/>
+
+	<android.support.v7.widget.AppCompatButton
+		android:id="@+id/copyButton"
+		style="@style/BriarButtonFlat.Positive"
+		android:layout_width="wrap_content"
+		android:layout_height="wrap_content"
+		android:layout_marginTop="@dimen/margin_large"
+		android:drawableLeft="@drawable/ic_content_copy"
+		android:drawablePadding="8dp"
+		android:text="@string/copy_button"
+		app:layout_constraintEnd_toStartOf="@+id/shareButton"
+		app:layout_constraintHorizontal_bias="0.5"
+		app:layout_constraintHorizontal_chainStyle="spread"
+		app:layout_constraintStart_toStartOf="parent"
+		app:layout_constraintTop_toBottomOf="@+id/linkView"/>
+
+	<Button
+		android:id="@+id/shareButton"
+		style="@style/BriarButtonFlat.Positive"
+		android:layout_width="wrap_content"
+		android:layout_height="wrap_content"
+		android:drawableLeft="@drawable/social_share_blue"
+		android:drawablePadding="8dp"
+		android:text="@string/share_button"
+		app:layout_constraintBottom_toBottomOf="@id/copyButton"
+		app:layout_constraintEnd_toStartOf="@+id/showCodeButton"
+		app:layout_constraintHorizontal_bias="0.5"
+		app:layout_constraintStart_toEndOf="@+id/copyButton"
+		app:layout_constraintTop_toTopOf="@id/copyButton"/>
+
+	<Button
+		android:id="@+id/showCodeButton"
+		style="@style/BriarButtonFlat.Positive"
+		android:layout_width="wrap_content"
+		android:layout_height="wrap_content"
+		android:drawableLeft="@drawable/ic_qr_code"
+		android:drawablePadding="8dp"
+		android:drawableTint="@color/briar_button_text_positive"
+		android:text="QR Code"
+		app:layout_constraintBottom_toBottomOf="@+id/copyButton"
+		app:layout_constraintEnd_toEndOf="parent"
+		app:layout_constraintHorizontal_bias="0.5"
+		app:layout_constraintStart_toEndOf="@+id/shareButton"
+		app:layout_constraintTop_toTopOf="@+id/copyButton"/>
+
+</android.support.constraint.ConstraintLayout>

briar-android/src/main/res/layout/fragment_contact_list.xml

@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="utf-8"?>
+<android.support.design.widget.CoordinatorLayout
+	xmlns:android="http://schemas.android.com/apk/res/android"
+	xmlns:app="http://schemas.android.com/apk/res-auto"
+	android:layout_width="match_parent"
+	android:layout_height="match_parent">
+
+	<org.briarproject.briar.android.view.BriarRecyclerView
+		android:id="@+id/list"
+		android:layout_width="match_parent"
+		android:layout_height="match_parent"
+		app:scrollToEnd="false"/>
+
+	<io.github.kobakei.materialfabspeeddial.FabSpeedDial
+		android:id="@+id/speedDial"
+		android:layout_width="match_parent"
+		android:layout_height="match_parent"
+		app:fab_fabDrawable="@drawable/ic_action_add"
+		app:fab_fabRippleColor="@android:color/transparent"
+		app:fab_menu="@menu/contact_list_actions"
+		app:fab_miniFabTextBackground="@color/briar_accent"
+		app:fab_miniFabTextColor="@android:color/white"/>
+
+</android.support.design.widget.CoordinatorLayout>

briar-android/src/main/res/layout/fragment_contact_qr_code_input.xml

@@ -0,0 +1,53 @@
+<?xml version="1.0" encoding="utf-8"?>
+<android.support.constraint.ConstraintLayout
+	xmlns:android="http://schemas.android.com/apk/res/android"
+	xmlns:app="http://schemas.android.com/apk/res-auto"
+	android:layout_width="match_parent"
+	android:layout_height="match_parent">
+
+	<org.briarproject.briar.android.keyagreement.CameraView
+		android:id="@+id/camera_view"
+		android:layout_width="match_parent"
+		android:layout_height="0dp"
+		app:layout_constraintEnd_toEndOf="parent"
+		app:layout_constraintStart_toStartOf="parent"
+		app:layout_constraintBottom_toTopOf="@+id/textView3"
+		app:layout_constraintTop_toTopOf="parent"/>
+
+	<TextView
+		android:id="@+id/textView3"
+		android:layout_width="wrap_content"
+		android:layout_height="wrap_content"
+		android:layout_marginEnd="8dp"
+		android:layout_marginLeft="8dp"
+		android:layout_marginRight="8dp"
+		android:layout_marginStart="8dp"
+		android:layout_marginTop="16dp"
+		android:visibility="gone"
+		android:text="or"
+		android:textSize="18sp"
+		app:layout_constraintBottom_toTopOf="@+id/enterLinkButton"
+		app:layout_constraintEnd_toEndOf="parent"
+		app:layout_constraintStart_toStartOf="parent"
+		app:layout_constraintTop_toBottomOf="@+id/camera_view"/>
+
+	<Button
+		android:id="@+id/enterLinkButton"
+		style="@style/BriarButton"
+		android:layout_width="wrap_content"
+		android:layout_height="wrap_content"
+		android:layout_marginBottom="16dp"
+		android:layout_marginEnd="8dp"
+		android:layout_marginStart="8dp"
+		android:layout_marginTop="16dp"
+		android:drawableLeft="@drawable/ic_link"
+		android:drawablePadding="8dp"
+		android:visibility="gone"
+		android:text="Enter Link"
+		app:layout_constraintBottom_toBottomOf="parent"
+		app:layout_constraintEnd_toEndOf="parent"
+		app:layout_constraintHorizontal_bias="0.5"
+		app:layout_constraintStart_toStartOf="parent"
+		app:layout_constraintTop_toBottomOf="@+id/textView3"/>
+
+</android.support.constraint.ConstraintLayout>

briar-android/src/main/res/layout/fragment_contact_qr_code_output.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<FrameLayout
+	xmlns:android="http://schemas.android.com/apk/res/android"
+	android:layout_width="match_parent"
+	android:layout_height="match_parent">
+
+	<org.briarproject.briar.android.view.QrCodeView
+		android:id="@+id/qrCodeView"
+		android:layout_width="match_parent"
+		android:layout_height="match_parent"
+		android:background="@android:color/white"/>
+
+</FrameLayout>

briar-android/src/main/res/layout/fragment_message.xml

@@ -5,6 +5,7 @@
 	xmlns:app="http://schemas.android.com/apk/res-auto"
 	android:layout_width="match_parent"
 	android:layout_height="match_parent"
+	app:allowEmptyText="true"
 	app:buttonText="@string/forum_share_button"
 	app:fillHeight="true"
 	app:hint="@string/forum_share_message"/>

briar-android/src/main/res/layout/fragment_reblog.xml

@@ -39,6 +39,7 @@
 		android:layout_width="match_parent"
 		android:layout_height="wrap_content"
 		android:gravity="bottom"
+		app:allowEmptyText="true"
 		app:buttonText="@string/blogs_reblog_button"
 		app:hint="@string/blogs_reblog_comment_hint"
 		app:maxLines="5"/>

briar-android/src/main/res/layout/image_preview.xml

@@ -0,0 +1,49 @@
+<?xml version="1.0" encoding="utf-8"?>
+<merge
+	xmlns:android="http://schemas.android.com/apk/res/android"
+	xmlns:app="http://schemas.android.com/apk/res-auto"
+	xmlns:tools="http://schemas.android.com/tools"
+	android:layout_width="match_parent"
+	android:layout_height="match_parent"
+	android:animateLayoutChanges="true"
+	tools:parentTag="android.support.constraint.ConstraintLayout"
+	tools:showIn="@layout/activity_conversation">
+
+	<View
+		android:id="@+id/divider"
+		style="@style/Divider.Horizontal"
+		android:layout_alignParentTop="true"
+		app:layout_constraintBottom_toTopOf="@+id/imageView"
+		app:layout_constraintEnd_toEndOf="parent"
+		app:layout_constraintStart_toStartOf="parent"
+		app:layout_constraintTop_toTopOf="parent"/>
+
+	<ImageView
+		android:id="@+id/imageView"
+		android:layout_width="match_parent"
+		android:layout_height="match_parent"
+		app:layout_constraintBottom_toBottomOf="parent"
+		app:layout_constraintEnd_toEndOf="parent"
+		app:layout_constraintStart_toStartOf="parent"
+		app:layout_constraintTop_toBottomOf="@+id/divider"
+		tools:ignore="ContentDescription"
+		tools:srcCompat="@tools:sample/avatars"/>
+
+	<android.support.design.widget.FloatingActionButton
+		android:id="@+id/imageCancelButton"
+		android:layout_width="wrap_content"
+		android:layout_height="wrap_content"
+		android:layout_marginBottom="8dp"
+		android:layout_marginEnd="8dp"
+		android:layout_marginRight="8dp"
+		android:layout_marginTop="8dp"
+		android:src="@drawable/ic_close"
+		app:backgroundTint="@color/briar_red"
+		app:fabCustomSize="26dp"
+		app:layout_constraintBottom_toBottomOf="parent"
+		app:layout_constraintEnd_toEndOf="parent"
+		app:layout_constraintTop_toTopOf="parent"
+		app:layout_constraintVertical_bias="0"
+		app:maxImageSize="18dp"/>
+
+</merge>

briar-android/src/main/res/layout/introduction_message.xml

@@ -118,6 +118,7 @@
 			android:layout_height="wrap_content"
 			android:layout_marginTop="@dimen/margin_large"
 			android:visibility="gone"
+			app:allowEmptyText="true"
 			app:buttonText="@string/introduction_button"
 			app:hint="@string/introduction_message_hint"
 			app:layout_constraintBottom_toBottomOf="parent"

briar-android/src/main/res/layout/list_item_pending_contact.xml

@@ -0,0 +1,82 @@
+<?xml version="1.0" encoding="utf-8"?>
+<android.support.constraint.ConstraintLayout
+	android:id="@+id/linearLayout4"
+	xmlns:android="http://schemas.android.com/apk/res/android"
+	xmlns:app="http://schemas.android.com/apk/res-auto"
+	xmlns:tools="http://schemas.android.com/tools"
+	android:layout_width="match_parent"
+	android:layout_height="wrap_content">
+
+	<org.briarproject.briar.android.view.TextAvatarView
+		android:id="@+id/avatar"
+		android:layout_width="@dimen/listitem_picture_frame_size"
+		android:layout_height="@dimen/listitem_picture_frame_size"
+		android:layout_marginBottom="8dp"
+		android:layout_marginLeft="@dimen/listitem_horizontal_margin"
+		android:layout_marginStart="@dimen/listitem_horizontal_margin"
+		android:layout_marginTop="8dp"
+		app:layout_constraintBottom_toTopOf="@+id/divider"
+		app:layout_constraintStart_toStartOf="parent"
+		app:layout_constraintTop_toTopOf="parent"/>
+
+	<com.vanniktech.emoji.EmojiTextView
+		android:id="@+id/name"
+		android:layout_width="wrap_content"
+		android:layout_height="wrap_content"
+		android:layout_marginEnd="@dimen/margin_large"
+		android:layout_marginStart="@dimen/margin_large"
+		android:layout_marginTop="@dimen/margin_large"
+		android:textColor="?android:attr/textColorPrimary"
+		android:textSize="@dimen/text_size_medium"
+		app:layout_constrainedWidth="true"
+		app:layout_constraintBottom_toTopOf="@+id/status"
+		app:layout_constraintEnd_toStartOf="@+id/time"
+		app:layout_constraintHorizontal_bias="0.5"
+		app:layout_constraintHorizontal_chainStyle="spread_inside"
+		app:layout_constraintStart_toEndOf="@+id/avatar"
+		app:layout_constraintTop_toTopOf="parent"
+		app:layout_constraintVertical_chainStyle="packed"
+		tools:text="This is a name of a contact"/>
+
+	<TextView
+		android:id="@+id/status"
+		android:layout_width="wrap_content"
+		android:layout_height="wrap_content"
+		android:layout_marginBottom="16dp"
+		android:layout_marginEnd="16dp"
+		android:layout_marginRight="16dp"
+		android:layout_marginTop="8dp"
+		android:text="@string/waiting_for_contact_to_come_online"
+		app:layout_constrainedWidth="true"
+		app:layout_constraintBottom_toTopOf="@+id/divider"
+		app:layout_constraintEnd_toStartOf="@+id/time"
+		app:layout_constraintHorizontal_bias="0.0"
+		app:layout_constraintStart_toStartOf="@+id/name"
+		app:layout_constraintTop_toBottomOf="@+id/name"/>
+
+	<TextView
+		android:id="@+id/time"
+		android:layout_width="wrap_content"
+		android:layout_height="wrap_content"
+		android:layout_margin="@dimen/margin_large"
+		android:layout_marginBottom="8dp"
+		android:layout_marginTop="8dp"
+		android:textColor="?android:attr/textColorSecondary"
+		android:textSize="@dimen/text_size_small"
+		app:layout_constraintBottom_toBottomOf="parent"
+		app:layout_constraintEnd_toEndOf="parent"
+		app:layout_constraintStart_toEndOf="@+id/name"
+		app:layout_constraintTop_toTopOf="parent"
+		tools:text="Dec 24"/>
+
+	<View
+		android:id="@+id/divider"
+		style="@style/Divider.ContactList"
+		android:layout_width="0dp"
+		android:layout_marginLeft="8dp"
+		android:layout_marginStart="8dp"
+		app:layout_constraintBottom_toBottomOf="parent"
+		app:layout_constraintEnd_toEndOf="parent"
+		app:layout_constraintStart_toEndOf="@+id/avatar"/>
+
+</android.support.constraint.ConstraintLayout>

briar-android/src/main/res/layout/text_input_view.xml

@@ -5,6 +5,7 @@
 	xmlns:tools="http://schemas.android.com/tools"
 	android:layout_width="match_parent"
 	android:layout_height="wrap_content"
+	android:animateLayoutChanges="true"
 	tools:showIn="@layout/activity_conversation">
 
 	<View
@@ -16,46 +17,48 @@
 		android:layout_height="wrap_content"
 		android:background="@color/card_background">
 
-		<android.support.v7.widget.AppCompatImageButton
-			android:id="@+id/emoji_toggle"
-			android:layout_width="@dimen/text_input_height"
-			android:layout_height="@dimen/text_input_height"
-			android:layout_gravity="bottom"
-			android:background="?attr/selectableItemBackground"
-			android:padding="@dimen/margin_small"
-			android:scaleType="center"
-			android:src="@drawable/ic_emoji_toggle"
-			app:tint="?attr/colorControlNormal"/>
-
-		<com.vanniktech.emoji.EmojiEditText
-			android:id="@+id/input_text"
+		<org.briarproject.briar.android.view.EmojiTextInputView
+			android:id="@+id/emojiTextInput"
 			android:layout_width="0dp"
 			android:layout_height="wrap_content"
 			android:layout_weight="1"
-			android:background="@android:color/transparent"
-			android:inputType="textMultiLine|textCapSentences"
-			android:maxLines="4"
-			android:minHeight="@dimen/text_input_height"
-			android:paddingLeft="2dp"
-			android:paddingStart="2dp"
-			android:textColor="?android:attr/textColorPrimary"
-			tools:ignore="RtlSymmetry"
-			tools:text="Line 1\nLine 2\nLine 3"/>
+			app:maxTextLines="4"/>
 
-		<android.support.v7.widget.AppCompatImageButton
-			android:id="@+id/btn_send"
+		<FrameLayout
 			android:layout_width="@dimen/text_input_height"
 			android:layout_height="@dimen/text_input_height"
-			android:layout_gravity="bottom"
-			android:background="?attr/selectableItemBackground"
-			android:clickable="true"
-			android:contentDescription="@string/send"
-			android:enabled="false"
-			android:focusable="true"
-			android:padding="4dp"
-			android:scaleType="center"
-			android:src="@drawable/social_send_now_white"
-			app:tint="@color/briar_accent"/>
+			android:layout_gravity="bottom">
+
+			<android.support.v7.widget.AppCompatImageButton
+				android:id="@+id/imageButton"
+				android:layout_width="@dimen/text_input_height"
+				android:layout_height="@dimen/text_input_height"
+				android:background="?attr/selectableItemBackground"
+				android:clickable="true"
+				android:contentDescription="@string/image_attach"
+				android:enabled="false"
+				android:focusable="true"
+				android:padding="4dp"
+				android:scaleType="center"
+				android:src="@drawable/ic_image"
+				android:visibility="invisible"
+				app:tint="?attr/colorControlNormal"/>
+
+			<android.support.v7.widget.AppCompatImageButton
+				android:id="@+id/btn_send"
+				android:layout_width="@dimen/text_input_height"
+				android:layout_height="@dimen/text_input_height"
+				android:background="?attr/selectableItemBackground"
+				android:clickable="true"
+				android:contentDescription="@string/send"
+				android:enabled="false"
+				android:focusable="true"
+				android:padding="4dp"
+				android:scaleType="center"
+				android:src="@drawable/social_send_now_white"
+				app:tint="@color/briar_accent"/>
+
+		</FrameLayout>
 
 	</LinearLayout>