Merge branch 'vector-compat' into 'master'

Use vector support libraries instead of rasterizing all drawables

See merge request briar/briar!1346

briar-android/artwork/notification_signout.svg

@@ -0,0 +1 @@
+<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd"><svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" version="1.1" width="24" height="24" viewBox="0 0 24 24"><path d="M16,17V14H9V10H16V7L21,12L16,17M14,2A2,2 0 0,1 16,4V6H14V4H5V20H14V18H16V20A2,2 0 0,1 14,22H5A2,2 0 0,1 3,20V4A2,2 0 0,1 5,2H14Z" /></svg>

briar-android/build.gradle

@@ -25,6 +25,8 @@ android {
 		versionCode 10213
 		versionName "1.2.13"
 		applicationId "org.briarproject.briar.android"
+
+		vectorDrawables.useSupportLibrary = true
 		buildConfigField "String", "GitHash",
 				"\"${getStdout(['git', 'rev-parse', '--short=7', 'HEAD'], 'No commit hash')}\""
 		def now = (long) (System.currentTimeMillis() / 1000)

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

@@ -255,7 +255,7 @@ class AndroidNotificationManagerImpl implements AndroidNotificationManager,
 				R.string.ongoing_notification_title;
 		int text = locked ? R.string.lock_tap_to_unlock :
 				R.string.ongoing_notification_text;
-		int icon = locked ? R.drawable.startup_lock :
+		int icon = locked ? R.drawable.notification_lock :
 				R.drawable.notification_ongoing;
 		// Ongoing foreground notification that shows BriarService is running
 		NotificationCompat.Builder b =
@@ -624,7 +624,7 @@ class AndroidNotificationManagerImpl implements AndroidNotificationManager,
 
 		NotificationCompat.Builder b =
 				new NotificationCompat.Builder(appContext, REMINDER_CHANNEL_ID);
-		b.setSmallIcon(R.drawable.ic_signout);
+		b.setSmallIcon(R.drawable.notification_signout);
 		b.setColor(getColor(appContext, R.color.briar_primary));
 		b.setContentTitle(
 				appContext.getText(R.string.reminder_notification_title));

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

@@ -3,6 +3,7 @@ package org.briarproject.briar.android.conversation;
 import android.annotation.SuppressLint;
 import android.content.DialogInterface;
 import android.content.Intent;
+import android.graphics.drawable.Drawable;
 import android.os.Bundle;
 import android.os.Parcelable;
 import android.transition.Slide;
@@ -105,6 +106,7 @@ import androidx.recyclerview.selection.SelectionTracker.SelectionObserver;
 import androidx.recyclerview.selection.StorageStrategy;
 import androidx.recyclerview.widget.LinearLayoutManager;
 import androidx.recyclerview.widget.RecyclerView;
+import androidx.vectordrawable.graphics.drawable.VectorDrawableCompat;
 import de.hdodenhof.circleimageview.CircleImageView;
 import uk.co.samuelwall.materialtaptargetprompt.MaterialTapTargetPrompt;
 
@@ -479,12 +481,10 @@ public class ConversationActivity extends BriarActivity
 	@UiThread
 	private void displayContactOnlineStatus() {
 		if (connectionRegistry.isConnected(contactId)) {
-			toolbarStatus.setImageDrawable(ContextCompat.getDrawable(
-					ConversationActivity.this, R.drawable.contact_online));
+			toolbarStatus.setImageResource(R.drawable.contact_online);
 			toolbarStatus.setContentDescription(getString(R.string.online));
 		} else {
-			toolbarStatus.setImageDrawable(ContextCompat.getDrawable(
-					ConversationActivity.this, R.drawable.contact_offline));
+			toolbarStatus.setImageResource(R.drawable.contact_offline);
 			toolbarStatus.setContentDescription(getString(R.string.offline));
 		}
 	}
@@ -935,13 +935,16 @@ public class ConversationActivity extends BriarActivity
 			return;
 		}
 
+		int color =
+				ContextCompat.getColor(this, R.color.briar_primary);
+		Drawable drawable = VectorDrawableCompat
+				.create(getResources(), R.drawable.ic_more_vert_accent, null);
 		new MaterialTapTargetPrompt.Builder(ConversationActivity.this,
 				R.style.OnboardingDialogTheme).setTarget(target)
 				.setPrimaryText(R.string.introduction_onboarding_title)
 				.setSecondaryText(R.string.introduction_onboarding_text)
-				.setIcon(R.drawable.ic_more_vert_accent)
-				.setBackgroundColour(
-						ContextCompat.getColor(this, R.color.briar_primary))
+				.setIconDrawable(drawable)
+				.setBackgroundColour(color)
 				.show();
 	}
 

briar-android/src/main/java/org/briarproject/briar/android/login/LoginUtils.java

@@ -1,17 +1,13 @@
 package org.briarproject.briar.android.login;
 
 import android.content.Context;
-import android.graphics.drawable.Drawable;
 
 import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import org.briarproject.briar.R;
 
 import androidx.appcompat.app.AlertDialog;
 
-import static androidx.core.content.ContextCompat.getColor;
-import static androidx.core.content.ContextCompat.getDrawable;
-import static androidx.core.graphics.drawable.DrawableCompat.setTint;
-import static java.util.Objects.requireNonNull;
+import static org.briarproject.briar.android.util.UiUtils.getDialogIcon;
 
 @NotNullByDefault
 class LoginUtils {
@@ -19,9 +15,7 @@ class LoginUtils {
 	static AlertDialog createKeyStrengthenerErrorDialog(Context ctx) {
 		AlertDialog.Builder builder =
 				new AlertDialog.Builder(ctx, R.style.BriarDialogTheme);
-		Drawable icon = getDrawable(ctx, R.drawable.alerts_and_states_error);
-		setTint(requireNonNull(icon), getColor(ctx, R.color.color_primary));
-		builder.setIcon(icon);
+		builder.setIcon(getDialogIcon(ctx, R.drawable.alerts_and_states_error));
 		builder.setTitle(R.string.dialog_title_cannot_check_password);
 		builder.setMessage(R.string.dialog_message_cannot_check_password);
 		builder.setPositiveButton(R.string.ok, null);

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

@@ -2,6 +2,7 @@ package org.briarproject.briar.android.navdrawer;
 
 import android.content.Intent;
 import android.content.res.Configuration;
+import android.graphics.drawable.Drawable;
 import android.net.Uri;
 import android.os.Bundle;
 import android.view.LayoutInflater;
@@ -59,6 +60,7 @@ import androidx.fragment.app.FragmentTransaction;
 import androidx.lifecycle.MutableLiveData;
 import androidx.lifecycle.ViewModelProvider;
 import androidx.lifecycle.ViewModelProviders;
+import androidx.vectordrawable.graphics.drawable.VectorDrawableCompat;
 import uk.co.samuelwall.materialtaptargetprompt.MaterialTapTargetPrompt;
 
 import static android.view.View.GONE;
@@ -433,8 +435,7 @@ public class NavDrawerActivity extends BriarActivity implements
 				Transport t = getItem(position);
 
 				ImageView icon = view.findViewById(R.id.imageView);
-				icon.setImageDrawable(ContextCompat.getDrawable(
-						NavDrawerActivity.this, t.iconDrawable));
+				icon.setImageResource(t.iconDrawable);
 				icon.setColorFilter(ContextCompat.getColor(
 						NavDrawerActivity.this, t.iconColor));
 
@@ -476,11 +477,13 @@ public class NavDrawerActivity extends BriarActivity implements
 	private void showTransportsOnboarding(boolean show, ImageView imageView) {
 		if (show) {
 			int color = resolveColorAttribute(this, R.attr.colorControlNormal);
+			Drawable drawable = VectorDrawableCompat
+					.create(getResources(), R.drawable.transport_tor, null);
 			new MaterialTapTargetPrompt.Builder(NavDrawerActivity.this,
 					R.style.OnboardingDialogTheme).setTarget(imageView)
 					.setPrimaryText(R.string.network_settings_title)
 					.setSecondaryText(R.string.transports_onboarding_text)
-					.setIcon(R.drawable.transport_tor)
+					.setIconDrawable(drawable)
 					.setIconDrawableColourFilter(color)
 					.setBackgroundColour(
 							ContextCompat.getColor(this, R.color.briar_primary))

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

@@ -141,8 +141,7 @@ public class TransportsActivity extends BriarActivity {
 				Transport t = getItem(position);
 
 				ImageView icon = view.findViewById(R.id.icon);
-				icon.setImageDrawable(ContextCompat.getDrawable(
-						TransportsActivity.this, t.iconDrawable));
+				icon.setImageResource(t.iconDrawable);
 				icon.setColorFilter(ContextCompat.getColor(
 						TransportsActivity.this, t.iconColor));
 

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

@@ -54,6 +54,7 @@ import androidx.fragment.app.FragmentManager;
 import androidx.lifecycle.LifecycleOwner;
 import androidx.lifecycle.LiveData;
 import androidx.lifecycle.Observer;
+import androidx.vectordrawable.graphics.drawable.VectorDrawableCompat;
 
 import static android.content.Context.KEYGUARD_SERVICE;
 import static android.content.Context.POWER_SERVICE;
@@ -88,7 +89,6 @@ import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_NO;
 import static androidx.appcompat.app.AppCompatDelegate.MODE_NIGHT_YES;
 import static androidx.appcompat.app.AppCompatDelegate.setDefaultNightMode;
 import static androidx.core.content.ContextCompat.getColor;
-import static androidx.core.content.ContextCompat.getDrawable;
 import static androidx.core.content.ContextCompat.getSystemService;
 import static androidx.core.graphics.drawable.DrawableCompat.setTint;
 import static androidx.core.view.ViewCompat.LAYOUT_DIRECTION_RTL;
@@ -436,7 +436,8 @@ public class UiUtils {
 	}
 
 	public static Drawable getDialogIcon(Context ctx, @DrawableRes int resId) {
-		Drawable icon = getDrawable(ctx, resId);
+		Drawable icon =
+				VectorDrawableCompat.create(ctx.getResources(), resId, null);
 		setTint(requireNonNull(icon), getColor(ctx, R.color.color_primary));
 		return icon;
 	}

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

@@ -2,7 +2,6 @@ package org.briarproject.briar.android.view;
 
 import android.content.Context;
 import android.content.res.TypedArray;
-import android.graphics.drawable.Drawable;
 import android.os.Handler;
 import android.os.Looper;
 import android.util.AttributeSet;
@@ -53,9 +52,8 @@ public class BriarRecyclerView extends FrameLayout {
 				R.styleable.BriarRecyclerView);
 		isScrollingToEnd = attributes
 				.getBoolean(R.styleable.BriarRecyclerView_scrollToEnd, true);
-		Drawable drawable = attributes
-				.getDrawable(R.styleable.BriarRecyclerView_emptyImage);
-		if (drawable != null) setEmptyImage(drawable);
+		int drawableRes = attributes.getResourceId(R.styleable.BriarRecyclerView_emptyImage, -1);
+		if (drawableRes != -1) setEmptyImage(drawableRes);
 		String emtpyText =
 				attributes.getString(R.styleable.BriarRecyclerView_emptyText);
 		if (emtpyText != null) setEmptyText(emtpyText);
@@ -139,11 +137,6 @@ public class BriarRecyclerView extends FrameLayout {
 		}
 	}
 
-	public void setEmptyImage(Drawable drawable) {
-		if (recyclerView == null) initViews();
-		emptyImage.setImageDrawable(drawable);
-	}
-
 	public void setEmptyImage(@DrawableRes int res) {
 		if (recyclerView == null) initViews();
 		emptyImage.setImageResource(res);

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

@@ -4,6 +4,7 @@ import android.app.Activity;
 import android.content.ClipData;
 import android.content.Context;
 import android.content.Intent;
+import android.graphics.drawable.Drawable;
 import android.net.Uri;
 import android.os.Parcel;
 import android.os.Parcelable;
@@ -28,6 +29,7 @@ import androidx.customview.view.AbsSavedState;
 import androidx.lifecycle.LifecycleOwner;
 import androidx.lifecycle.LiveData;
 import androidx.lifecycle.Observer;
+import androidx.vectordrawable.graphics.drawable.VectorDrawableCompat;
 import uk.co.samuelwall.materialtaptargetprompt.MaterialTapTargetPrompt;
 
 import static android.os.Build.VERSION.SDK_INT;
@@ -253,12 +255,14 @@ public class TextAttachmentController extends TextSendController
 
 	public void showImageOnboarding(Activity activity) {
 		int color = resolveColorAttribute(activity, R.attr.colorControlNormal);
+		Drawable drawable = VectorDrawableCompat
+				.create(activity.getResources(), R.drawable.ic_image, null);
 		new MaterialTapTargetPrompt.Builder(activity,
 				R.style.OnboardingDialogTheme).setTarget(sendButton)
 				.setPrimaryText(R.string.dialog_title_image_support)
 				.setSecondaryText(R.string.dialog_message_image_support)
 				.setBackgroundColour(getColor(activity, R.color.briar_primary))
-				.setIcon(R.drawable.ic_image)
+				.setIconDrawable(drawable)
 				.setIconDrawableColourFilter(color)
 				.show();
 	}

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

@@ -8,7 +8,6 @@ import org.briarproject.briar.R;
 
 import androidx.annotation.UiThread;
 import androidx.appcompat.widget.AppCompatImageView;
-import androidx.core.content.ContextCompat;
 
 @UiThread
 public class TrustIndicatorView extends AppCompatImageView {
@@ -44,7 +43,7 @@ public class TrustIndicatorView extends AppCompatImageView {
 			default:
 				res = R.drawable.trust_indicator_unknown;
 		}
-		setImageDrawable(ContextCompat.getDrawable(getContext(), res));
+		setImageResource(res);
 		setVisibility(VISIBLE);
 
 		invalidate();

briar-android/src/main/res/drawable-anydpi-v24/notification_blog.xml

@@ -1,10 +1,10 @@
 <?xml version="1.0" encoding="utf-8"?>
 <vector xmlns:android="http://schemas.android.com/apk/res/android"
-        android:width="24dp"
-        android:height="24dp"
-        android:viewportHeight="24.0"
-        android:viewportWidth="24.0">
+	android:width="24dp"
+	android:height="24dp"
+	android:viewportWidth="24.0"
+	android:viewportHeight="24.0">
 	<path
 		android:fillColor="#FFFFFFFF"
-		android:pathData="M13,12h7v1.5h-7zM13,9.5h7L20,11h-7zM13,14.5h7L20,16h-7zM21,4L3,4c-1.1,0 -2,0.9 -2,2v13c0,1.1 0.9,2 2,2h18c1.1,0 2,-0.9 2,-2L23,6c0,-1.1 -0.9,-2 -2,-2zM21,19h-9L12,6h9v13z"/>
+		android:pathData="M13,12h7v1.5h-7zM13,9.5h7L20,11h-7zM13,14.5h7L20,16h-7zM21,4L3,4c-1.1,0 -2,0.9 -2,2v13c0,1.1 0.9,2 2,2h18c1.1,0 2,-0.9 2,-2L23,6c0,-1.1 -0.9,-2 -2,-2zM21,19h-9L12,6h9v13z" />
 </vector>

briar-android/src/main/res/drawable-anydpi-v24/notification_contact_added.xml

@@ -1,10 +1,10 @@
 <?xml version="1.0" encoding="utf-8"?>
 <vector xmlns:android="http://schemas.android.com/apk/res/android"
-        android:width="24dp"
-        android:height="24dp"
-        android:viewportHeight="24.0"
-        android:viewportWidth="24.0">
+	android:width="24dp"
+	android:height="24dp"
+	android:viewportWidth="24.0"
+	android:viewportHeight="24.0">
 	<path
 		android:fillColor="#FFFFFFFF"
-		android:pathData="M20,0L4,0v2h16L20,0zM4,24h16v-2L4,22v2zM20,4L4,4c-1.1,0 -2,0.9 -2,2v12c0,1.1 0.9,2 2,2h16c1.1,0 2,-0.9 2,-2L22,6c0,-1.1 -0.9,-2 -2,-2zM12,6.75c1.24,0 2.25,1.01 2.25,2.25s-1.01,2.25 -2.25,2.25S9.75,10.24 9.75,9 10.76,6.75 12,6.75zM17,17L7,17v-1.5c0,-1.67 3.33,-2.5 5,-2.5s5,0.83 5,2.5L17,17z"/>
+		android:pathData="M20,0L4,0v2h16L20,0zM4,24h16v-2L4,22v2zM20,4L4,4c-1.1,0 -2,0.9 -2,2v12c0,1.1 0.9,2 2,2h16c1.1,0 2,-0.9 2,-2L22,6c0,-1.1 -0.9,-2 -2,-2zM12,6.75c1.24,0 2.25,1.01 2.25,2.25s-1.01,2.25 -2.25,2.25S9.75,10.24 9.75,9 10.76,6.75 12,6.75zM17,17L7,17v-1.5c0,-1.67 3.33,-2.5 5,-2.5s5,0.83 5,2.5L17,17z" />
 </vector>

briar-android/src/main/res/drawable-anydpi-v24/notification_lock.xml

@@ -0,0 +1,15 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24"
+    android:tint="#FFFFFF">
+  <group android:scaleX="0.92"
+      android:scaleY="0.92"
+      android:translateX="0.96"
+      android:translateY="0.96">
+    <path
+        android:fillColor="@android:color/white"
+        android:pathData="M18,8h-1L17,6c0,-2.76 -2.24,-5 -5,-5S7,3.24 7,6v2L6,8c-1.1,0 -2,0.9 -2,2v10c0,1.1 0.9,2 2,2h12c1.1,0 2,-0.9 2,-2L20,10c0,-1.1 -0.9,-2 -2,-2zM12,17c-1.1,0 -2,-0.9 -2,-2s0.9,-2 2,-2 2,0.9 2,2 -0.9,2 -2,2zM15.1,8L8.9,8L8.9,6c0,-1.71 1.39,-3.1 3.1,-3.1 1.71,0 3.1,1.39 3.1,3.1v2z"/>
+  </group>
+</vector>

briar-android/src/main/res/drawable-anydpi-v24/notification_private_group.xml

@@ -1,10 +1,10 @@
 <?xml version="1.0" encoding="utf-8"?>
 <vector xmlns:android="http://schemas.android.com/apk/res/android"
-        android:width="24dp"
-        android:height="24dp"
-        android:viewportHeight="24.0"
-        android:viewportWidth="24.0">
+	android:width="24dp"
+	android:height="24dp"
+	android:viewportWidth="24.0"
+	android:viewportHeight="24.0">
 	<path
 		android:fillColor="#FFFFFFFF"
-		android:pathData="M16,11c1.66,0 2.99,-1.34 2.99,-3S17.66,5 16,5c-1.66,0 -3,1.34 -3,3s1.34,3 3,3zM8,11c1.66,0 2.99,-1.34 2.99,-3S9.66,5 8,5C6.34,5 5,6.34 5,8s1.34,3 3,3zM8,13c-2.33,0 -7,1.17 -7,3.5L1,19h14v-2.5c0,-2.33 -4.67,-3.5 -7,-3.5zM16,13c-0.29,0 -0.62,0.02 -0.97,0.05 1.16,0.84 1.97,1.97 1.97,3.45L17,19h6v-2.5c0,-2.33 -4.67,-3.5 -7,-3.5z"/>
+		android:pathData="M16,11c1.66,0 2.99,-1.34 2.99,-3S17.66,5 16,5c-1.66,0 -3,1.34 -3,3s1.34,3 3,3zM8,11c1.66,0 2.99,-1.34 2.99,-3S9.66,5 8,5C6.34,5 5,6.34 5,8s1.34,3 3,3zM8,13c-2.33,0 -7,1.17 -7,3.5L1,19h14v-2.5c0,-2.33 -4.67,-3.5 -7,-3.5zM16,13c-0.29,0 -0.62,0.02 -0.97,0.05 1.16,0.84 1.97,1.97 1.97,3.45L17,19h6v-2.5c0,-2.33 -4.67,-3.5 -7,-3.5z" />
 </vector>

briar-android/src/main/res/drawable-anydpi-v24/notification_private_message.xml

@@ -1,10 +1,10 @@
 <?xml version="1.0" encoding="utf-8"?>
 <vector xmlns:android="http://schemas.android.com/apk/res/android"
-        android:width="24dp"
-        android:height="24dp"
-        android:viewportHeight="24.0"
-        android:viewportWidth="24.0">
+	android:width="24dp"
+	android:height="24dp"
+	android:viewportWidth="24.0"
+	android:viewportHeight="24.0">
 	<path
 		android:fillColor="#FFFFFFFF"
-		android:pathData="M20,2L4,2c-1.1,0 -1.99,0.9 -1.99,2L2,22l4,-4h14c1.1,0 2,-0.9 2,-2L22,4c0,-1.1 -0.9,-2 -2,-2zM18,14L6,14v-2h12v2zM18,11L6,11L6,9h12v2zM18,8L6,8L6,6h12v2z"/>
+		android:pathData="M20,2L4,2c-1.1,0 -1.99,0.9 -1.99,2L2,22l4,-4h14c1.1,0 2,-0.9 2,-2L22,4c0,-1.1 -0.9,-2 -2,-2zM18,14L6,14v-2h12v2zM18,11L6,11L6,9h12v2zM18,8L6,8L6,6h12v2z" />
 </vector>

briar-android/src/main/res/drawable-anydpi-v24/notification_signout.xml

@@ -0,0 +1,15 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24"
+    android:tint="#FFFFFF">
+  <group android:scaleX="0.92"
+      android:scaleY="0.92"
+      android:translateX="0.96"
+      android:translateY="0.96">
+    <path
+        android:fillColor="#FF000000"
+        android:pathData="M16,17V14H9V10H16V7L21,12L16,17M14,2A2,2 0,0 1,16 4V6H14V4H5V20H14V18H16V20A2,2 0,0 1,14 22H5A2,2 0,0 1,3 20V4A2,2 0,0 1,5 2H14Z"/>
+  </group>
+</vector>

briar-android/src/main/res/layout-h650dp/navigation_header.xml

@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <FrameLayout 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="85dp"
@@ -16,6 +17,6 @@
 		android:layout_marginRight="@dimen/margin_medium"
 		android:layout_marginBottom="@dimen/margin_medium"
 		android:contentDescription="@string/app_name"
-		android:src="@drawable/navigation_drawer_header" />
+		app:srcCompat="@drawable/navigation_drawer_header" />
 
 </FrameLayout>

briar-android/src/main/res/layout-land/fragment_keyagreement_id.xml

@@ -20,11 +20,11 @@
 			android:adjustViewBounds="true"
 			android:padding="@dimen/margin_medium"
 			android:scaleType="fitCenter"
-			android:src="@drawable/qr_code_intro"
 			app:layout_constraintBottom_toBottomOf="@id/explanationText"
 			app:layout_constraintEnd_toStartOf="@id/explanationText"
 			app:layout_constraintStart_toStartOf="parent"
 			app:layout_constraintTop_toTopOf="parent"
+			app:srcCompat="@drawable/qr_code_intro"
 			app:tint="@color/color_primary"
 			tools:ignore="ContentDescription" />
 
@@ -38,11 +38,11 @@
 			android:paddingTop="@dimen/margin_large"
 			android:paddingEnd="@dimen/margin_large"
 			android:scaleType="fitCenter"
-			android:src="@drawable/qr_code_explanation"
 			app:layout_constraintBottom_toTopOf="@id/explanationText"
 			app:layout_constraintEnd_toEndOf="parent"
 			app:layout_constraintStart_toEndOf="@id/diagram"
 			app:layout_constraintTop_toTopOf="parent"
+			app:srcCompat="@drawable/qr_code_explanation"
 			tools:ignore="ContentDescription" />
 
 		<TextView

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

@@ -52,7 +52,7 @@
 				android:layout_height="0dp"
 				android:contentDescription="@string/close"
 				android:scaleType="center"
-				android:src="@drawable/ic_close"
+				app:srcCompat="@drawable/ic_close"
 				app:layout_constraintBottom_toBottomOf="parent"
 				app:layout_constraintEnd_toEndOf="parent"
 				app:layout_constraintTop_toTopOf="parent"

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

@@ -13,10 +13,10 @@
 		android:layout_marginStart="8dp"
 		android:layout_marginLeft="8dp"
 		android:elevation="@dimen/margin_tiny"
-		android:src="@drawable/ic_info_white"
 		app:layout_constraintBottom_toTopOf="@+id/divider"
 		app:layout_constraintStart_toStartOf="parent"
 		app:layout_constraintTop_toTopOf="parent"
+		app:srcCompat="@drawable/ic_info_white"
 		app:tint="?attr/colorControlNormal" />
 
 	<TextView

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

@@ -12,12 +12,12 @@
 		android:layout_width="150dp"
 		android:layout_height="150dp"
 		android:layout_margin="@dimen/margin_large"
-		android:src="@drawable/splash_screen"
 		app:layout_constraintBottom_toBottomOf="parent"
 		app:layout_constraintEnd_toEndOf="parent"
 		app:layout_constraintStart_toStartOf="parent"
 		app:layout_constraintTop_toTopOf="parent"
 		app:layout_constraintVertical_bias="0.1"
+		app:srcCompat="@drawable/splash_screen"
 		app:tint="?attr/colorControlNormal" />
 
 </androidx.constraintlayout.widget.ConstraintLayout>

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

@@ -29,10 +29,10 @@
 		android:contentDescription="@string/blogs_reblog_button"
 		android:padding="2dp"
 		android:scaleType="fitCenter"
-		android:src="@drawable/ic_repeat"
 		android:visibility="invisible"
 		app:layout_constraintBottom_toBottomOf="@+id/avatar"
-		app:layout_constraintEnd_toEndOf="@+id/avatar" />
+		app:layout_constraintEnd_toEndOf="@+id/avatar"
+		app:srcCompat="@drawable/ic_repeat" />
 
 	<com.vanniktech.emoji.EmojiTextView
 		android:id="@+id/authorName"

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

@@ -16,7 +16,7 @@
 		android:background="?attr/selectableItemBackground"
 		android:padding="@dimen/margin_small"
 		android:scaleType="center"
-		android:src="@drawable/ic_emoji_toggle"
+		app:srcCompat="@drawable/ic_emoji_toggle"
 		app:tint="?attr/colorControlNormal" />
 
 	<com.vanniktech.emoji.EmojiEditText

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

@@ -24,7 +24,6 @@
 				android:layout_width="0dp"
 				android:layout_height="0dp"
 				android:padding="8dp"
-				android:src="@drawable/ic_crash"
 				app:layout_constraintBottom_toTopOf="@+id/crashed"
 				app:layout_constraintDimensionRatio="1:1"
 				app:layout_constraintEnd_toEndOf="parent"
@@ -32,6 +31,7 @@
 				app:layout_constraintStart_toStartOf="parent"
 				app:layout_constraintTop_toTopOf="parent"
 				app:layout_constraintVertical_chainStyle="packed"
+				app:srcCompat="@drawable/ic_crash"
 				app:tint="?attr/colorControlNormal"
 				tools:ignore="ContentDescription" />
 

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

@@ -14,10 +14,10 @@
 		android:layout_marginTop="8dp"
 		android:layout_marginEnd="8dp"
 		android:layout_marginRight="8dp"
-		android:src="@drawable/alerts_and_states_error"
 		app:layout_constraintEnd_toEndOf="parent"
 		app:layout_constraintStart_toStartOf="parent"
 		app:layout_constraintTop_toTopOf="parent"
+		app:srcCompat="@drawable/alerts_and_states_error"
 		app:tint="?attr/colorControlNormal"
 		tools:ignore="ContentDescription" />
 

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

@@ -30,10 +30,10 @@
 			android:layout_marginTop="16dp"
 			android:layout_marginRight="16dp"
 			android:scaleType="fitCenter"
-			android:src="@drawable/qr_code_error"
 			app:layout_constraintEnd_toEndOf="parent"
 			app:layout_constraintStart_toStartOf="parent"
 			app:layout_constraintTop_toBottomOf="@+id/errorTitle"
+			app:srcCompat="@drawable/qr_code_error"
 			app:tint="?attr/colorControlNormal"
 			tools:ignore="ContentDescription" />
 

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

@@ -19,11 +19,11 @@
 			android:adjustViewBounds="true"
 			android:paddingBottom="@dimen/margin_large"
 			android:scaleType="fitCenter"
-			android:src="@drawable/qr_code_intro"
 			app:layout_constraintBottom_toTopOf="@id/explanationImage"
 			app:layout_constraintEnd_toEndOf="parent"
 			app:layout_constraintStart_toStartOf="parent"
 			app:layout_constraintTop_toTopOf="parent"
+			app:srcCompat="@drawable/qr_code_intro"
 			app:tint="@color/color_primary" />
 
 		<ImageView
@@ -35,11 +35,11 @@
 			android:paddingTop="@dimen/margin_large"
 			android:paddingRight="@dimen/margin_large"
 			android:scaleType="fitCenter"
-			android:src="@drawable/qr_code_explanation"
 			app:layout_constraintBottom_toTopOf="@id/explanationText"
 			app:layout_constraintEnd_toEndOf="@id/diagram"
 			app:layout_constraintStart_toStartOf="@id/diagram"
 			app:layout_constraintTop_toBottomOf="@id/diagram"
+			app:srcCompat="@drawable/qr_code_explanation"
 			tools:ignore="ContentDescription" />
 
 		<TextView

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

@@ -81,9 +81,9 @@
 			android:layout_marginTop="32dp"
 			android:background="@drawable/bubble_accent"
 			android:scaleType="center"
-			android:src="@drawable/ic_call_made"
 			app:layout_constraintStart_toStartOf="parent"
 			app:layout_constraintTop_toBottomOf="@+id/stepOneText"
+			app:srcCompat="@drawable/ic_call_made"
 			app:tint="@android:color/white" />
 
 		<TextView
@@ -123,11 +123,11 @@
 			style="@style/BriarButtonFlat.Positive.Tiny"
 			android:layout_width="wrap_content"
 			android:layout_height="wrap_content"
-			android:drawableStart="@drawable/ic_content_copy"
-			android:drawableLeft="@drawable/ic_content_copy"
 			android:drawablePadding="8dp"
 			android:enabled="false"
 			android:text="@string/copy_button"
+			app:drawableLeftCompat="@drawable/ic_content_copy"
+			app:drawableStartCompat="@drawable/ic_content_copy"
 			app:layout_constraintEnd_toStartOf="@id/shareButton"
 			app:layout_constraintHorizontal_bias="1.0"
 			app:layout_constraintHorizontal_chainStyle="packed"
@@ -139,11 +139,11 @@
 			style="@style/BriarButtonFlat.Positive.Tiny"
 			android:layout_width="wrap_content"
 			android:layout_height="wrap_content"
-			android:drawableStart="@drawable/social_share_blue"
-			android:drawableLeft="@drawable/social_share_blue"
 			android:drawablePadding="8dp"
 			android:enabled="false"
 			android:text="@string/share_button"
+			app:drawableLeftCompat="@drawable/social_share_blue"
+			app:drawableStartCompat="@drawable/social_share_blue"
 			app:layout_constraintBottom_toBottomOf="@id/copyButton"
 			app:layout_constraintEnd_toEndOf="parent"
 			app:layout_constraintHorizontal_bias="1.0"
@@ -157,9 +157,9 @@
 			android:layout_marginTop="16dp"
 			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:srcCompat="@drawable/ic_call_received"
 			app:tint="@android:color/white" />
 
 		<TextView
@@ -202,10 +202,10 @@
 			style="@style/BriarButtonFlat.Positive.Tiny"
 			android:layout_width="wrap_content"
 			android:layout_height="wrap_content"
-			android:drawableStart="@drawable/ic_content_paste"
-			android:drawableLeft="@drawable/ic_content_paste"
 			android:drawablePadding="8dp"
 			android:text="@string/paste_button"
+			app:drawableLeftCompat="@drawable/ic_content_paste"
+			app:drawableStartCompat="@drawable/ic_content_paste"
 			app:layout_constraintEnd_toEndOf="parent"
 			app:layout_constraintHorizontal_bias="1.0"
 			app:layout_constraintStart_toStartOf="parent"

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

@@ -77,13 +77,13 @@
 			android:layout_width="0dp"
 			android:layout_height="0dp"
 			android:layout_marginTop="32dp"
-			android:src="@drawable/ic_nickname"
 			app:layout_constraintBottom_toTopOf="@+id/nicknameIcon"
 			app:layout_constraintDimensionRatio="1:1"
 			app:layout_constraintEnd_toEndOf="parent"
 			app:layout_constraintHeight_max="256dp"
 			app:layout_constraintStart_toStartOf="parent"
 			app:layout_constraintTop_toBottomOf="@+id/stepOneText"
+			app:srcCompat="@drawable/ic_nickname"
 			tools:ignore="ContentDescription" />
 
 		<androidx.appcompat.widget.AppCompatImageView
@@ -93,10 +93,10 @@
 			android:layout_marginTop="32dp"
 			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:srcCompat="@drawable/ic_person"
 			app:tint="@android:color/white" />
 
 		<TextView

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

@@ -10,13 +10,13 @@
 		android:layout_width="128dp"
 		android:layout_height="128dp"
 		android:scaleType="center"
-		android:src="@drawable/startup_lock"
 		app:layout_constraintBottom_toTopOf="@+id/textView"
 		app:layout_constraintEnd_toEndOf="parent"
 		app:layout_constraintStart_toStartOf="parent"
 		app:layout_constraintTop_toTopOf="parent"
 		app:layout_constraintVertical_bias="0.5"
 		app:layout_constraintVertical_chainStyle="packed"
+		app:srcCompat="@drawable/startup_lock"
 		app:tint="@color/briar_accent"
 		tools:ignore="ContentDescription" />
 

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

@@ -10,13 +10,13 @@
 		android:layout_width="128dp"
 		android:layout_height="128dp"
 		android:scaleType="center"
-		android:src="@drawable/startup_lock"
 		app:layout_constraintBottom_toTopOf="@+id/textView"
 		app:layout_constraintEnd_toEndOf="parent"
 		app:layout_constraintStart_toStartOf="parent"
 		app:layout_constraintTop_toTopOf="parent"
 		app:layout_constraintVertical_bias="0.5"
 		app:layout_constraintVertical_chainStyle="packed"
+		app:srcCompat="@drawable/startup_lock"
 		app:tint="@color/briar_primary"
 		tools:ignore="ContentDescription" />
 

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

@@ -38,13 +38,13 @@
 		android:layout_marginEnd="8dp"
 		android:layout_marginRight="8dp"
 		android:layout_marginBottom="8dp"
-		android:src="@drawable/ic_close"
 		app:backgroundTint="@color/briar_accent"
 		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" />
+		app:maxImageSize="18dp"
+		app:srcCompat="@drawable/ic_close" />
 
 </merge>

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

@@ -43,11 +43,11 @@
 			android:layout_width="wrap_content"
 			android:layout_height="wrap_content"
 			android:layout_margin="@dimen/margin_large"
-			android:src="@drawable/ic_contact_introduction"
 			app:layout_constraintBottom_toBottomOf="@+id/barrier"
 			app:layout_constraintEnd_toEndOf="parent"
 			app:layout_constraintStart_toStartOf="parent"
 			app:layout_constraintTop_toTopOf="@+id/avatarContact2"
+			app:srcCompat="@drawable/ic_contact_introduction"
 			app:tint="?attr/colorControlNormal"
 			tools:ignore="ContentDescription" />
 

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

@@ -47,9 +47,9 @@
 			android:layout_height="@dimen/button_size"
 			android:background="?attr/selectableItemBackgroundBorderless"
 			android:contentDescription="@string/blogs_reblog_comment_hint"
-			android:src="@drawable/ic_repeat"
 			app:layout_constraintEnd_toEndOf="parent"
 			app:layout_constraintTop_toTopOf="parent"
+			app:srcCompat="@drawable/ic_repeat"
 			app:tint="?attr/colorControlNormal" />
 
 		<com.vanniktech.emoji.EmojiTextView

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

@@ -41,10 +41,10 @@
 		android:layout_height="@dimen/button_size"
 		android:background="?attr/selectableItemBackgroundBorderless"
 		android:contentDescription="@string/groups_remove"
-		android:src="@drawable/action_delete_black"
 		app:layout_constraintEnd_toEndOf="parent"
 		app:layout_constraintStart_toEndOf="@+id/name"
 		app:layout_constraintTop_toTopOf="parent"
+		app:srcCompat="@drawable/action_delete_black"
 		app:tint="?attr/colorControlNormal" />
 
 	<TextView

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

@@ -40,9 +40,9 @@
 		android:layout_marginStart="@dimen/listitem_horizontal_margin"
 		android:layout_marginLeft="@dimen/listitem_horizontal_margin"
 		android:layout_marginTop="4dp"
-		android:src="@drawable/ic_visibility"
 		app:layout_constraintStart_toEndOf="@+id/avatarView"
 		app:layout_constraintTop_toBottomOf="@+id/nameView"
+		app:srcCompat="@drawable/ic_visibility"
 		app:tint="?attr/colorControlNormal"
 		tools:ignore="ContentDescription" />
 

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

@@ -27,9 +27,9 @@
 		android:layout_margin="@dimen/margin_medium"
 		android:background="?attr/selectableItemBackgroundBorderless"
 		android:contentDescription="@string/delete"
-		android:src="@drawable/action_delete_black"
 		app:layout_constraintEnd_toEndOf="parent"
 		app:layout_constraintTop_toTopOf="parent"
+		app:srcCompat="@drawable/action_delete_black"
 		app:tint="?attr/colorControlNormal" />
 
 	<TextView

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

@@ -26,11 +26,11 @@
 		android:layout_width="24dp"
 		android:layout_height="24dp"
 		android:layout_margin="@dimen/margin_medium"
-		android:src="@drawable/ic_check_white"
 		android:visibility="invisible"
 		app:layout_constraintBottom_toBottomOf="@+id/button"
 		app:layout_constraintStart_toStartOf="parent"
 		app:layout_constraintTop_toTopOf="@+id/button"
+		app:srcCompat="@drawable/ic_check_white"
 		app:tint="?attr/colorControlNormal"
 		tools:ignore="ContentDescription" />
 
@@ -52,10 +52,10 @@
 		android:layout_height="24dp"
 		android:layout_margin="@dimen/margin_medium"
 		android:contentDescription="@string/help"
-		android:src="@drawable/ic_help_outline_white"
 		android:tint="@color/briar_button_text_positive"
 		app:layout_constraintBottom_toBottomOf="@+id/button"
 		app:layout_constraintEnd_toEndOf="parent"
-		app:layout_constraintTop_toTopOf="@+id/button" />
+		app:layout_constraintTop_toTopOf="@+id/button"
+		app:srcCompat="@drawable/ic_help_outline_white" />
 
 </merge>

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

@@ -1,5 +1,6 @@
 <?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"
 	tools:showIn="@layout/fragment_keyagreement_qr">
 
@@ -25,6 +26,6 @@
 		android:alpha="0.54"
 		android:background="?attr/selectableItemBackground"
 		android:contentDescription="@string/show_qr_code_fullscreen"
-		android:src="@drawable/ic_fullscreen_black_48dp" />
+		app:srcCompat="@drawable/ic_fullscreen_black_48dp" />
 
 </merge>

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

@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <FrameLayout 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">
 
@@ -9,6 +10,6 @@
 		android:layout_gravity="center"
 		android:layout_margin="@dimen/margin_xxlarge"
 		android:contentDescription="@string/app_name"
-		android:src="@drawable/splash_screen" />
+		app:srcCompat="@drawable/splash_screen" />
 
 </FrameLayout>

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

@@ -19,8 +19,8 @@
 		android:focusable="true"
 		android:padding="4dp"
 		android:scaleType="center"
-		android:src="@drawable/ic_image_off"
 		android:visibility="invisible"
+		app:srcCompat="@drawable/ic_image_off"
 		app:tint="?attr/colorControlNormal" />
 
 	<androidx.appcompat.widget.AppCompatImageButton
@@ -34,7 +34,7 @@
 		android:focusable="true"
 		android:padding="4dp"
 		android:scaleType="center"
-		android:src="@drawable/social_send_now_white"
+		app:srcCompat="@drawable/social_send_now_white"
 		app:tint="@color/briar_accent" />
 
 	<ProgressBar

briar-android/src/main/res/values/styles.xml

@@ -141,7 +141,7 @@
 	<style name="StepBubble.Completed">
 		<item name="android:background">@drawable/bubble_completed</item>
 		<item name="android:scaleType">center</item>
-		<item name="android:src">@drawable/ic_check_white</item>
+		<item name="srcCompat">@drawable/ic_check_white</item>
 	</style>
 
 </resources>