Pause between connection attempts.

.gitlab-ci.yml

@@ -21,7 +21,11 @@ test:
 
 
 test_reproducible:
+  image: briar/reproducer:latest
+
   script:
-    - "curl -X POST -F token=${RELEASE_CHECK_TOKEN} -F ref=master -F variables[RELEASE_TAG]=${CI_COMMIT_REF_NAME} https://code.briarproject.org/api/v4/projects/61/trigger/pipeline"
+    - cd /opt/briar-reproducer
+    - ./reproduce.py ${CI_COMMIT_REF_NAME}
+
   only:
     - tags

bramble-android/build.gradle

@@ -8,11 +8,9 @@ android {
 	defaultConfig {
 		minSdkVersion 14
 		targetSdkVersion 26
-		versionCode 10013
-		versionName "1.0.13"
+		versionCode 10005
+		versionName "1.0.5"
 		consumerProguardFiles 'proguard-rules.txt'
-
-		testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
 	}
 
 	compileOptions {
@@ -28,47 +26,41 @@ configurations {
 dependencies {
 	implementation project(path: ':bramble-core', configuration: 'default')
 	implementation 'org.briarproject:jtorctl:0.3'
-	tor 'org.briarproject:tor-android:0.2.9.16@zip'
+	tor 'org.briarproject:tor-android:0.2.9.15@zip'
 
 	annotationProcessor 'com.google.dagger:dagger-compiler:2.0.2'
 
 	compileOnly 'javax.annotation:jsr250-api:1.0'
-
-	androidTestImplementation project(path: ':bramble-api', configuration: 'testOutput')
-	androidTestImplementation project(path: ':bramble-core', configuration: 'testOutput')
-	androidTestImplementation 'com.android.support.test:runner:1.0.2'
-	androidTestAnnotationProcessor 'com.google.dagger:dagger-compiler:2.0.2'
-	androidTestCompileOnly 'javax.annotation:jsr250-api:1.0'
 }
 
 dependencyVerification {
 	verify = [
-			'com.android.tools.analytics-library:protos:26.1.3:protos-26.1.3.jar:818c9f256f141d9dafec03a1aa2b94d240b2c140acfd7ee31a8b3e6c2b9479e3',
-			'com.android.tools.analytics-library:shared:26.1.3:shared-26.1.3.jar:7110706c7ada96c8b6f5ca80c478291bc7899d46277de2c48527e045442401a3',
-			'com.android.tools.analytics-library:tracker:26.1.3:tracker-26.1.3.jar:4155424bf2ce4872da83332579a1707252bc66cbd77c5144fdc4483d0f2e1418',
-			'com.android.tools.build:apksig:3.1.3:apksig-3.1.3.jar:7e1f8e675a6e768e5b56405e41d6c3cc05befe62e601b04177de1029902c9c89',
-			'com.android.tools.build:builder-model:3.1.3:builder-model-3.1.3.jar:06ad1c422d679fc698451479cb40ba863849d67bfd1de23f6d2c16d78b024b0b',
-			'com.android.tools.build:builder-test-api:3.1.3:builder-test-api-3.1.3.jar:4d989f780436794f0f8b2f50e9e079b786571eac90f26c208ab2ae6d4012f389',
-			'com.android.tools.build:builder:3.1.3:builder-3.1.3.jar:8a1092012c89d0ec1ee2eff09c5708c71ef4482a6862df8d3a44a67fccace01c',
-			'com.android.tools.build:gradle-api:3.1.3:gradle-api-3.1.3.jar:01e4df521456aef66514336f1d492346730dd1fb8f6433a89f62da834941ed72',
-			'com.android.tools.build:manifest-merger:26.1.3:manifest-merger-26.1.3.jar:1e4fc7e932adb4607082409800e5e6fccb42e6c5360ae5990094bf522f3ada55',
-			'com.android.tools.ddms:ddmlib:26.1.3:ddmlib-26.1.3.jar:c54931cd68df5d1ea2923b3b320eae47cd2307a5a916bb8674c0acf93cd1d3cd',
-			'com.android.tools.external.com-intellij:intellij-core:26.1.3:intellij-core-26.1.3.jar:af67f5535fef2e1a28b1007a4acb8c5deb6a1e33b8afe7b11d012c9e778ebcec',
-			'com.android.tools.external.com-intellij:kotlin-compiler:26.1.3:kotlin-compiler-26.1.3.jar:c746d2859dc11cc05c84b692b3498d3a621e0929511f8440ee009c6557838fd4',
-			'com.android.tools.external.org-jetbrains:uast:26.1.3:uast-26.1.3.jar:3f3f6651d0c7685a77ecb22e9c82d6b49fdf24322c17360768dc530678f43265',
-			'com.android.tools.layoutlib:layoutlib-api:26.1.3:layoutlib-api-26.1.3.jar:10bc73ce706c45629872d6a999dbe12116df64e24f47ff93b7b13121ff57b4b0',
-			'com.android.tools.lint:lint-api:26.1.3:lint-api-26.1.3.jar:6f97323f9af8deda86278717885b5c927f3766757db89709f52d11d42b6fb751',
-			'com.android.tools.lint:lint-checks:26.1.3:lint-checks-26.1.3.jar:73c3d53784c9ce3e6d5968506581918e0179645d20809927ca4a001dd766b001',
-			'com.android.tools.lint:lint-gradle-api:26.1.3:lint-gradle-api-26.1.3.jar:7ca3c4866ec21dc21d53a9d86f752b77ace6f6c610a0c9dc877313856c733d9d',
-			'com.android.tools.lint:lint-gradle:26.1.3:lint-gradle-26.1.3.jar:db0c354b8f4b6f6637e31f91c564785a59ff896325331fcbc3de7458e0b6c067',
-			'com.android.tools.lint:lint-kotlin:26.1.3:lint-kotlin-26.1.3.jar:94e2b0f4565a241561cfb8fc1222bb3f132a3b98d2a90421dbb72ee8358e7d68',
-			'com.android.tools.lint:lint:26.1.3:lint-26.1.3.jar:8d5f32c989c6d191d712e90ad3ca2d1c409313599551d04d834caa44d26c78df',
-			'com.android.tools:annotations:26.1.3:annotations-26.1.3.jar:c950430b24ac5d58fc97e7283b8f0115f99587e76e08b4e1e2aaa780f2d77323',
-			'com.android.tools:common:26.1.3:common-26.1.3.jar:7c31a90581a148ab219f615a59667f0dded7fa39b248529784474da3c2274ef2',
-			'com.android.tools:dvlib:26.1.3:dvlib-26.1.3.jar:0cae87906f53d3f1088366a916ed180a7312b6d9919b90797f238875c8492855',
-			'com.android.tools:repository:26.1.3:repository-26.1.3.jar:52d4539cc68db91b261e2a33b2c8206b26e05539078758dc28cfb3854adb4f59',
-			'com.android.tools:sdk-common:26.1.3:sdk-common-26.1.3.jar:1948603ca9ff22c7ebb3178000bffa3a9dd2ca1cc5cb0c793cae08468b8fcfc1',
-			'com.android.tools:sdklib:26.1.3:sdklib-26.1.3.jar:4adcfaad9514607098d2c51503c39811112d3050f4d1e744c01c7f08f591032b',
+			'com.android.tools.analytics-library:protos:26.1.2:protos-26.1.2.jar:52672a0b42b572a06aecc3535d5068eb46c0e15d129b9f1085d3c16a1da5cdbb',
+			'com.android.tools.analytics-library:shared:26.1.2:shared-26.1.2.jar:5c7e0eda18c6f87feeb83628c707e8aaa3298b41fb72e38efe31ad1675f9e8e9',
+			'com.android.tools.analytics-library:tracker:26.1.2:tracker-26.1.2.jar:06f97aa0adf44ffb06f8681c6a79d9be153a08f61d21eddc42b8d3db96df4282',
+			'com.android.tools.build:apksig:3.1.2:apksig-3.1.2.jar:40696a4559124d1d57873d208857eee059d48859239d569c7d18374ac644a8be',
+			'com.android.tools.build:builder-model:3.1.2:builder-model-3.1.2.jar:d49bfa2a135c9562b6ca7aa4342036cfa1582c7074c2d1d93d1dae8b3a134e17',
+			'com.android.tools.build:builder-test-api:3.1.2:builder-test-api-3.1.2.jar:dfe2a50b740d41b11189101062434d4283d18647e89a492ad51710c719363e9f',
+			'com.android.tools.build:builder:3.1.2:builder-3.1.2.jar:b60f825a42e2efe8433619fbc759f3d9effecab718279048d36881188ceb1d14',
+			'com.android.tools.build:gradle-api:3.1.2:gradle-api-3.1.2.jar:e58bcc5b893e4583ab0f5c8ef89c4dbcce202b405a9d7fcc116d21e5357d4893',
+			'com.android.tools.build:manifest-merger:26.1.2:manifest-merger-26.1.2.jar:9c61c27ea5266573107b954acf1216d398f4d7e7ae6fad6409d6b2b767eb091c',
+			'com.android.tools.ddms:ddmlib:26.1.2:ddmlib-26.1.2.jar:18a2a5fbef36882f07d03c2b9e59eba05cf8248177bf5cbff736e4b582804c44',
+			'com.android.tools.external.com-intellij:intellij-core:26.1.2:intellij-core-26.1.2.jar:37c5acf279f1ae3e85b1a5be3c9f15f43bde7b08f978eefefffb9c4035760c52',
+			'com.android.tools.external.com-intellij:kotlin-compiler:26.1.2:kotlin-compiler-26.1.2.jar:152df0bee7580326c77316b669a9d96e3b09efb1d45f545dce4147271b0b8944',
+			'com.android.tools.external.org-jetbrains:uast:26.1.2:uast-26.1.2.jar:02d39582206d3f5fc0a6cb18bfd9e8b9f9c1acb805ec6dac08b4e3a56849d279',
+			'com.android.tools.layoutlib:layoutlib-api:26.1.2:layoutlib-api-26.1.2.jar:20220039fcc7d799f928153beff862e704457c0f55ab44258f3745ebeb662b4f',
+			'com.android.tools.lint:lint-api:26.1.2:lint-api-26.1.2.jar:e1d5b62b870a7c566e9877a6b96b27784a4d713f8caa07fdcb4705d47a40a1d9',
+			'com.android.tools.lint:lint-checks:26.1.2:lint-checks-26.1.2.jar:211e2afd58504372385d71b1e5be982c2b5121ab6fee1c04ddabeb75a8729e07',
+			'com.android.tools.lint:lint-gradle-api:26.1.2:lint-gradle-api-26.1.2.jar:71284f2a8b03c3e55c94511c9eb36f8184fbb85324325fc6b78abf5183f03d90',
+			'com.android.tools.lint:lint-gradle:26.1.2:lint-gradle-26.1.2.jar:855f0c82b7fc690df1b7319c0774f7517f7f8f5dd4eee1f6077dcf50e07c6240',
+			'com.android.tools.lint:lint-kotlin:26.1.2:lint-kotlin-26.1.2.jar:1e591f70bcbbc11569720a9bbcca2bc1f3d4f789f01f40f642848d920643d484',
+			'com.android.tools.lint:lint:26.1.2:lint-26.1.2.jar:93736c62e9f1976998c2b4aa716aea0734cdb162d05502f4af7292654aedb182',
+			'com.android.tools:annotations:26.1.2:annotations-26.1.2.jar:72773dcaf5c4ccca828e3c8467f1b78a8a00b3cc5f8ad1aab88fcf9379928018',
+			'com.android.tools:common:26.1.2:common-26.1.2.jar:ea4320f0c17dcbc4491896bb705c4d25ec08bd62ef02ab0579fe154e75e788e6',
+			'com.android.tools:dvlib:26.1.2:dvlib-26.1.2.jar:1187aa4fb666595c96c4deb6bc0e0f4b7e396bde9f6243330b49a232946130ea',
+			'com.android.tools:repository:26.1.2:repository-26.1.2.jar:8b86e512ad6d32bd76989451eefe2b271f5efce6d4d65ecb173afaf14606e01a',
+			'com.android.tools:sdk-common:26.1.2:sdk-common-26.1.2.jar:23584720a60a21cdcb5b1ec10269e3013789d6805d153cc696c39ec7ce251896',
+			'com.android.tools:sdklib:26.1.2:sdklib-26.1.2.jar:d3870fafc59ab8efa70d3f9649f40ee299c8ec5b58377b06e8853d7272a5bf4e',
 			'com.google.code.findbugs:jsr305:1.3.9:jsr305-1.3.9.jar:905721a0eea90a81534abb7ee6ef4ea2e5e645fa1def0a5cd88402df1b46c9ed',
 			'com.google.code.gson:gson:2.7:gson-2.7.jar:2d43eb5ea9e133d2ee2405cc14f5ee08951b8361302fdd93494a3a997b508d32',
 			'com.google.dagger:dagger-compiler:2.0.2:dagger-compiler-2.0.2.jar:b74bc9de063dd4c6400b232231f2ef5056145b8fbecbf5382012007dd1c071b3',
@@ -100,7 +92,7 @@ dependencyVerification {
 			'org.bouncycastle:bcpkix-jdk15on:1.56:bcpkix-jdk15on-1.56.jar:7043dee4e9e7175e93e0b36f45b1ec1ecb893c5f755667e8b916eb8dd201c6ca',
 			'org.bouncycastle:bcprov-jdk15on:1.56:bcprov-jdk15on-1.56.jar:963e1ee14f808ffb99897d848ddcdb28fa91ddda867eb18d303e82728f878349',
 			'org.briarproject:jtorctl:0.3:jtorctl-0.3.jar:f2939238a097898998432effe93b0334d97a787972ab3a91a8973a1d309fc864',
-			'org.briarproject:tor-android:0.2.9.16:tor-android-0.2.9.16.zip:515e33dda6a30853c885a2de2c79ae1ab9ad8b6db44f5db8890333ec2e24f4ae',
+			'org.briarproject:tor-android:0.2.9.15:tor-android-0.2.9.15.zip:34a6474ee219ffa52e0f3393e917dda6ed03d320b02247d4fa5075aa4094ee6d',
 			'org.codehaus.groovy:groovy-all:2.4.12:groovy-all-2.4.12.jar:6a56af4bd48903d56bec62821876cadefafd007360cc6bd0d8f7aa8d72b38be4',
 			'org.codehaus.mojo:animal-sniffer-annotations:1.14:animal-sniffer-annotations-1.14.jar:2068320bd6bad744c3673ab048f67e30bef8f518996fa380033556600669905d',
 			'org.glassfish.jaxb:jaxb-core:2.2.11:jaxb-core-2.2.11.jar:37bcaee8ebb04362c8352a5bf6221b86967ecdab5164c696b10b9a2bb587b2aa',

bramble-android/src/androidTest/java/org/briarproject/bramble/IntegrationTestComponent.java

@@ -1,23 +0,0 @@
-package org.briarproject.bramble;
-
-import org.briarproject.bramble.event.EventModule;
-import org.briarproject.bramble.plugin.PluginModule;
-import org.briarproject.bramble.plugin.tor.BridgeTest;
-import org.briarproject.bramble.system.SystemModule;
-
-import javax.inject.Singleton;
-
-import dagger.Component;
-
-@Singleton
-@Component(modules = {
-		BrambleAndroidModule.class,
-		PluginModule.class,  // needed for BackoffFactory
-		EventModule.class,
-		SystemModule.class,
-})
-public interface IntegrationTestComponent {
-
-	void inject(BridgeTest init);
-
-}

bramble-android/src/androidTest/java/org/briarproject/bramble/plugin/tor/BridgeTest.java

@@ -1,126 +0,0 @@
-package org.briarproject.bramble.plugin.tor;
-
-import android.content.Context;
-import android.support.test.runner.AndroidJUnit4;
-
-import org.briarproject.bramble.DaggerIntegrationTestComponent;
-import org.briarproject.bramble.IntegrationTestComponent;
-import org.briarproject.bramble.api.event.EventBus;
-import org.briarproject.bramble.api.plugin.BackoffFactory;
-import org.briarproject.bramble.api.plugin.duplex.DuplexPlugin;
-import org.briarproject.bramble.api.system.Clock;
-import org.briarproject.bramble.api.system.LocationUtils;
-import org.briarproject.bramble.test.BrambleTestCase;
-import org.junit.Before;
-import org.junit.Test;
-import org.junit.runner.RunWith;
-
-import java.util.List;
-import java.util.concurrent.Executor;
-import java.util.concurrent.Executors;
-import java.util.concurrent.ScheduledExecutorService;
-import java.util.concurrent.ScheduledThreadPoolExecutor;
-import java.util.logging.Logger;
-
-import javax.inject.Inject;
-import javax.net.SocketFactory;
-
-import static android.support.test.InstrumentationRegistry.getTargetContext;
-import static java.util.Collections.singletonList;
-import static java.util.concurrent.TimeUnit.SECONDS;
-import static org.junit.Assert.assertNotNull;
-import static org.junit.Assert.assertTrue;
-import static org.junit.Assert.fail;
-
-
-@RunWith(AndroidJUnit4.class)
-public class BridgeTest extends BrambleTestCase {
-
-	private final static long TIMEOUT = SECONDS.toMillis(23);
-
-	private final static Logger LOG =
-			Logger.getLogger(BridgeTest.class.getSimpleName());
-
-	@Inject
-	EventBus eventBus;
-	@Inject
-	BackoffFactory backoffFactory;
-	@Inject
-	Clock clock;
-
-	private final Context appContext = getTargetContext();
-	private final CircumventionProvider circumventionProvider;
-	private final List<String> bridges;
-	private TorPluginFactory factory;
-	private volatile int currentBridge = 0;
-
-	public BridgeTest() {
-		super();
-		circumventionProvider = new CircumventionProvider() {
-			@Override
-			public boolean isTorProbablyBlocked(String countryCode) {
-				return true;
-			}
-
-			@Override
-			public boolean doBridgesWork(String countryCode) {
-				return true;
-			}
-
-			@Override
-			public List<String> getBridges() {
-				return singletonList(bridges.get(currentBridge));
-			}
-		};
-		bridges = new CircumventionProviderImpl(appContext).getBridges();
-	}
-
-	@Before
-	public void setUp() {
-		IntegrationTestComponent component =
-				DaggerIntegrationTestComponent.builder().build();
-		component.inject(this);
-
-		Executor ioExecutor = Executors.newCachedThreadPool();
-		ScheduledExecutorService scheduler = new ScheduledThreadPoolExecutor(1);
-		LocationUtils locationUtils = () -> "US";
-		SocketFactory torSocketFactory = SocketFactory.getDefault();
-
-		factory = new TorPluginFactory(ioExecutor, scheduler, appContext,
-				locationUtils, eventBus, torSocketFactory,
-				backoffFactory, circumventionProvider, clock);
-	}
-
-	@Test
-	public void testBridges() throws Exception {
-		assertTrue(bridges.size() > 0);
-
-		for (int i = 0; i < bridges.size(); i++) {
-			testBridge(i);
-		}
-	}
-
-	private void testBridge(int bridge) throws Exception {
-		DuplexPlugin duplexPlugin =
-				factory.createPlugin(new TorPluginCallBack());
-		assertNotNull(duplexPlugin);
-		TorPlugin plugin = (TorPlugin) duplexPlugin;
-
-		currentBridge = bridge;
-		LOG.warning("Testing " + bridges.get(currentBridge));
-		try {
-			plugin.start();
-			long start = clock.currentTimeMillis();
-			while (clock.currentTimeMillis() - start < TIMEOUT) {
-				if (plugin.isRunning()) return;
-				clock.sleep(500);
-			}
-			if (!plugin.isRunning()) {
-				fail("Could not connect to Tor within timeout.");
-			}
-		} finally {
-			plugin.stop();
-		}
-	}
-
-}

bramble-android/src/androidTest/java/org/briarproject/bramble/plugin/tor/TorPluginCallBack.java

@@ -1,54 +0,0 @@
-package org.briarproject.bramble.plugin.tor;
-
-import org.briarproject.bramble.api.contact.ContactId;
-import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-import org.briarproject.bramble.api.plugin.duplex.DuplexPluginCallback;
-import org.briarproject.bramble.api.plugin.duplex.DuplexTransportConnection;
-import org.briarproject.bramble.api.properties.TransportProperties;
-import org.briarproject.bramble.api.settings.Settings;
-
-@NotNullByDefault
-public class TorPluginCallBack implements DuplexPluginCallback {
-
-	@Override
-	public void incomingConnectionCreated(DuplexTransportConnection d) {
-
-	}
-
-	@Override
-	public void outgoingConnectionCreated(ContactId c,
-			DuplexTransportConnection d) {
-
-	}
-
-	@Override
-	public Settings getSettings() {
-		return new Settings();
-	}
-
-	@Override
-	public TransportProperties getLocalProperties() {
-		return new TransportProperties();
-	}
-
-	@Override
-	public void mergeSettings(Settings s) {
-
-	}
-
-	@Override
-	public void mergeLocalProperties(TransportProperties p) {
-
-	}
-
-	@Override
-	public void transportEnabled() {
-
-	}
-
-	@Override
-	public void transportDisabled() {
-
-	}
-
-}

bramble-android/src/main/AndroidManifest.xml

@@ -2,13 +2,14 @@
 	package="org.briarproject.bramble"
 	xmlns:android="http://schemas.android.com/apk/res/android">
 
-	<uses-feature android:name="android.hardware.bluetooth" android:required="false"/>
+	<uses-feature android:name="android.hardware.bluetooth"/>
 
 	<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
 	<uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>
 	<uses-permission android:name="android.permission.BLUETOOTH"/>
 	<uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/>
 	<uses-permission android:name="android.permission.INTERNET"/>
+	<uses-permission android:name="android.permission.READ_LOGS"/>
 	<uses-permission android:name="android.permission.WAKE_LOCK"/>
 
 	<application

bramble-android/src/main/java/org/briarproject/bramble/BrambleAndroidModule.java

@@ -1,25 +1,11 @@
 package org.briarproject.bramble;
 
-import android.app.Application;
-
-import org.briarproject.bramble.plugin.tor.CircumventionProvider;
-import org.briarproject.bramble.plugin.tor.CircumventionProviderImpl;
 import org.briarproject.bramble.system.AndroidSystemModule;
 
-import javax.inject.Singleton;
-
 import dagger.Module;
-import dagger.Provides;
 
 @Module(includes = {
 		AndroidSystemModule.class
 })
 public class BrambleAndroidModule {
-
-	@Provides
-	@Singleton
-	CircumventionProvider provideCircumventionProvider(Application app) {
-		return new CircumventionProviderImpl(app.getApplicationContext());
-	}
-
 }

bramble-android/src/main/java/org/briarproject/bramble/plugin/bluetooth/AndroidBluetoothPlugin.java

@@ -38,7 +38,6 @@ import static android.bluetooth.BluetoothAdapter.SCAN_MODE_NONE;
 import static android.bluetooth.BluetoothAdapter.STATE_OFF;
 import static android.bluetooth.BluetoothAdapter.STATE_ON;
 import static java.util.logging.Level.WARNING;
-import static org.briarproject.bramble.util.LogUtils.logException;
 
 @MethodsNotNullByDefault
 @ParametersNotNullByDefault
@@ -146,7 +145,7 @@ class AndroidBluetoothPlugin extends BluetoothPlugin<BluetoothServerSocket> {
 		try {
 			if (ss != null) ss.close();
 		} catch (IOException e) {
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 		}
 	}
 
@@ -186,7 +185,7 @@ class AndroidBluetoothPlugin extends BluetoothPlugin<BluetoothServerSocket> {
 		try {
 			if (c != null) c.close();
 		} catch (IOException e) {
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 		}
 	}
 

bramble-android/src/main/java/org/briarproject/bramble/plugin/tor/CircumventionProvider.java

@@ -1,30 +0,0 @@
-package org.briarproject.bramble.plugin.tor;
-
-import org.briarproject.bramble.api.lifecycle.IoExecutor;
-
-import java.util.List;
-
-public interface CircumventionProvider {
-
-	/**
-	 * Countries where Tor is blocked, i.e. vanilla Tor connection won't work.
-	 *
-	 * See https://en.wikipedia.org/wiki/ISO_3166-1_alpha-2
-	 * and https://trac.torproject.org/projects/tor/wiki/doc/OONI/censorshipwiki
-	 */
-	String[] BLOCKED = {"CN", "IR", "EG", "BY", "TR", "SY", "VE"};
-
-	/**
-	 * Countries where vanilla bridge connection are likely to work.
-	 * Should be a subset of {@link #BLOCKED}.
-	 */
-	String[] BRIDGES = { "EG", "BY", "TR", "SY", "VE" };
-
-	boolean isTorProbablyBlocked(String countryCode);
-
-	boolean doBridgesWork(String countryCode);
-
-	@IoExecutor
-	List<String> getBridges();
-
-}

bramble-android/src/main/java/org/briarproject/bramble/plugin/tor/CircumventionProviderImpl.java

@@ -1,68 +0,0 @@
-package org.briarproject.bramble.plugin.tor;
-
-import android.content.Context;
-import android.content.res.Resources;
-
-import org.briarproject.bramble.api.lifecycle.IoExecutor;
-
-import java.io.InputStream;
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.HashSet;
-import java.util.List;
-import java.util.Scanner;
-import java.util.Set;
-
-import javax.annotation.Nullable;
-import javax.inject.Inject;
-
-public class CircumventionProviderImpl implements CircumventionProvider {
-
-	private final static String BRIDGE_FILE_NAME = "bridges";
-
-	private final Context ctx;
-	@Nullable
-	private volatile List<String> bridges = null;
-
-	@Inject
-	public CircumventionProviderImpl(Context ctx) {
-		this.ctx = ctx;
-	}
-
-	private static final Set<String> BLOCKED_IN_COUNTRIES =
-			new HashSet<>(Arrays.asList(BLOCKED));
-	private static final Set<String> BRIDGES_WORK_IN_COUNTRIES =
-			new HashSet<>(Arrays.asList(BRIDGES));
-
-	@Override
-	public boolean isTorProbablyBlocked(String countryCode) {
-		return BLOCKED_IN_COUNTRIES.contains(countryCode);
-	}
-
-	@Override
-	public boolean doBridgesWork(String countryCode) {
-		return BRIDGES_WORK_IN_COUNTRIES.contains(countryCode);
-	}
-
-	@Override
-	@IoExecutor
-	public List<String> getBridges() {
-		if (this.bridges != null) return this.bridges;
-
-		Resources res = ctx.getResources();
-		int resId = res.getIdentifier(BRIDGE_FILE_NAME, "raw",
-				ctx.getPackageName());
-		InputStream is = ctx.getResources().openRawResource(resId);
-		Scanner scanner = new Scanner(is);
-
-		List<String> bridges = new ArrayList<>();
-		while (scanner.hasNextLine()) {
-			String line = scanner.nextLine();
-			if (!line.startsWith("#")) bridges.add(line);
-		}
-		scanner.close();
-		this.bridges = bridges;
-		return bridges;
-	}
-
-}

bramble-android/src/main/java/org/briarproject/bramble/plugin/tor/TorNetworkMetadata.java

@@ -0,0 +1,18 @@
+package org.briarproject.bramble.plugin.tor;
+
+import java.util.Arrays;
+import java.util.HashSet;
+import java.util.Set;
+
+class TorNetworkMetadata {
+
+	// See https://en.wikipedia.org/wiki/ISO_3166-1_alpha-2
+	// and https://trac.torproject.org/projects/tor/wiki/doc/OONI/censorshipwiki
+	// TODO: get a more complete list
+	private static final Set<String> BLOCKED_IN_COUNTRIES =
+			new HashSet<>(Arrays.asList("CN", "IR", "SY", "ZZ"));
+
+	static boolean isTorProbablyBlocked(String countryCode) {
+		return BLOCKED_IN_COUNTRIES.contains(countryCode);
+	}
+}

bramble-android/src/main/java/org/briarproject/bramble/plugin/tor/TorPlugin.java

@@ -10,6 +10,7 @@ import android.content.pm.PackageManager.NameNotFoundException;
 import android.content.res.Resources;
 import android.net.ConnectivityManager;
 import android.net.NetworkInfo;
+import android.os.FileObserver;
 import android.os.PowerManager;
 
 import net.freehaven.tor.control.EventHandler;
@@ -33,10 +34,8 @@ import org.briarproject.bramble.api.plugin.duplex.DuplexTransportConnection;
 import org.briarproject.bramble.api.properties.TransportProperties;
 import org.briarproject.bramble.api.settings.Settings;
 import org.briarproject.bramble.api.settings.event.SettingsUpdatedEvent;
-import org.briarproject.bramble.api.system.Clock;
 import org.briarproject.bramble.api.system.LocationUtils;
 import org.briarproject.bramble.util.IoUtils;
-import org.briarproject.bramble.util.RenewableWakeLock;
 import org.briarproject.bramble.util.StringUtils;
 
 import java.io.Closeable;
@@ -50,14 +49,13 @@ import java.io.OutputStream;
 import java.net.InetSocketAddress;
 import java.net.ServerSocket;
 import java.net.Socket;
-import java.util.ArrayList;
 import java.util.Arrays;
-import java.util.Collection;
 import java.util.Collections;
 import java.util.List;
 import java.util.Map;
 import java.util.Map.Entry;
 import java.util.Scanner;
+import java.util.concurrent.CountDownLatch;
 import java.util.concurrent.Executor;
 import java.util.concurrent.Future;
 import java.util.concurrent.ScheduledExecutorService;
@@ -80,6 +78,7 @@ import static android.net.ConnectivityManager.TYPE_WIFI;
 import static android.os.Build.VERSION.SDK_INT;
 import static android.os.PowerManager.ACTION_DEVICE_IDLE_MODE_CHANGED;
 import static android.os.PowerManager.PARTIAL_WAKE_LOCK;
+import static java.util.concurrent.TimeUnit.MILLISECONDS;
 import static java.util.concurrent.TimeUnit.MINUTES;
 import static java.util.logging.Level.INFO;
 import static java.util.logging.Level.WARNING;
@@ -93,7 +92,6 @@ import static org.briarproject.bramble.api.plugin.TorConstants.PREF_TOR_NETWORK_
 import static org.briarproject.bramble.api.plugin.TorConstants.PREF_TOR_NETWORK_WIFI;
 import static org.briarproject.bramble.api.plugin.TorConstants.PREF_TOR_PORT;
 import static org.briarproject.bramble.api.plugin.TorConstants.PROP_ONION;
-import static org.briarproject.bramble.util.LogUtils.logException;
 import static org.briarproject.bramble.util.PrivacyUtils.scrubOnion;
 
 @MethodsNotNullByDefault
@@ -104,11 +102,8 @@ class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 			"CIRC", "ORCONN", "HS_DESC", "NOTICE", "WARN", "ERR"
 	};
 	private static final String OWNER = "__OwningControllerProcess";
-	private static final int COOKIE_TIMEOUT_MS = 3000;
-	private static final int COOKIE_POLLING_INTERVAL_MS = 200;
+	private static final int COOKIE_TIMEOUT = 3000; // Milliseconds
 	private static final Pattern ONION = Pattern.compile("[a-z2-7]{16}");
-	// This tag may prevent Huawei's power manager from killing us
-	private static final String WAKE_LOCK_TAG = "LocationManagerService";
 	private static final Logger LOG =
 			Logger.getLogger(TorPlugin.class.getName());
 
@@ -117,16 +112,14 @@ class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 	private final Context appContext;
 	private final LocationUtils locationUtils;
 	private final SocketFactory torSocketFactory;
-	private final Clock clock;
 	private final Backoff backoff;
 	private final DuplexPluginCallback callback;
 	private final String architecture;
-	private final CircumventionProvider circumventionProvider;
 	private final int maxLatency, maxIdleTime, socketTimeout;
 	private final ConnectionStatus connectionStatus;
 	private final File torDirectory, torFile, geoIpFile, configFile;
 	private final File doneFile, cookieFile;
-	private final RenewableWakeLock wakeLock;
+	private final PowerManager.WakeLock wakeLock;
 	private final AtomicReference<Future<?>> connectivityCheck =
 			new AtomicReference<>();
 	private final AtomicBoolean used = new AtomicBoolean(false);
@@ -139,19 +132,17 @@ class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 
 	TorPlugin(Executor ioExecutor, ScheduledExecutorService scheduler,
 			Context appContext, LocationUtils locationUtils,
-			SocketFactory torSocketFactory, Clock clock, Backoff backoff,
+			SocketFactory torSocketFactory, Backoff backoff,
 			DuplexPluginCallback callback, String architecture,
-			CircumventionProvider circumventionProvider, int maxLatency, int maxIdleTime) {
+			int maxLatency, int maxIdleTime) {
 		this.ioExecutor = ioExecutor;
 		this.scheduler = scheduler;
 		this.appContext = appContext;
 		this.locationUtils = locationUtils;
 		this.torSocketFactory = torSocketFactory;
-		this.clock = clock;
 		this.backoff = backoff;
 		this.callback = callback;
 		this.architecture = architecture;
-		this.circumventionProvider = circumventionProvider;
 		this.maxLatency = maxLatency;
 		this.maxIdleTime = maxIdleTime;
 		if (maxIdleTime > Integer.MAX_VALUE / 2)
@@ -164,13 +155,14 @@ class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 		configFile = new File(torDirectory, "torrc");
 		doneFile = new File(torDirectory, "done");
 		cookieFile = new File(torDirectory, ".tor/control_auth_cookie");
+		Object o = appContext.getSystemService(POWER_SERVICE);
+		PowerManager pm = (PowerManager) o;
+		// This tag will prevent Huawei's powermanager from killing us.
+		wakeLock = pm.newWakeLock(PARTIAL_WAKE_LOCK, "LocationManagerService");
+		wakeLock.setReferenceCounted(false);
 		// Don't execute more than one connection status check at a time
 		connectionStatusExecutor = new PoliteExecutor("TorPlugin",
 				ioExecutor, 1);
-		PowerManager pm = (PowerManager)
-				appContext.getSystemService(POWER_SERVICE);
-		wakeLock = new RenewableWakeLock(pm, scheduler, PARTIAL_WAKE_LOCK,
-				WAKE_LOCK_TAG, 1, MINUTES);
 	}
 
 	@Override
@@ -193,10 +185,18 @@ class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 		if (used.getAndSet(true)) throw new IllegalStateException();
 		// Install or update the assets if necessary
 		if (!assetsAreUpToDate()) installAssets();
-		if (cookieFile.exists() && !cookieFile.delete())
-			LOG.warning("Old auth cookie not deleted");
-		// Start a new Tor process
 		LOG.info("Starting Tor");
+		// Watch for the auth cookie file being updated
+		try {
+			cookieFile.getParentFile().mkdirs();
+			cookieFile.createNewFile();
+		} catch (IOException e) {
+			throw new PluginException(e);
+		}
+		CountDownLatch latch = new CountDownLatch(1);
+		FileObserver obs = new WriteObserver(cookieFile, latch);
+		obs.startWatching();
+		// Start a new Tor process
 		String torPath = torFile.getAbsolutePath();
 		String configPath = configFile.getAbsolutePath();
 		String pid = String.valueOf(android.os.Process.myPid());
@@ -235,16 +235,11 @@ class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 				throw new PluginException();
 			}
 			// Wait for the auth cookie file to be created/updated
-			long start = clock.currentTimeMillis();
-			while (cookieFile.length() < 32) {
-				if (clock.currentTimeMillis() - start > COOKIE_TIMEOUT_MS) {
-					LOG.warning("Auth cookie not created");
-					if (LOG.isLoggable(INFO)) listFiles(torDirectory);
-					throw new PluginException();
-				}
-				Thread.sleep(COOKIE_POLLING_INTERVAL_MS);
+			if (!latch.await(COOKIE_TIMEOUT, MILLISECONDS)) {
+				LOG.warning("Auth cookie not created");
+				if (LOG.isLoggable(INFO)) listFiles(torDirectory);
+				throw new PluginException();
 			}
-			LOG.info("Auth cookie created");
 		} catch (InterruptedException e) {
 			LOG.warning("Interrupted while starting Tor");
 			Thread.currentThread().interrupt();
@@ -352,7 +347,7 @@ class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 		try {
 			if (c != null) c.close();
 		} catch (IOException e) {
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 		}
 	}
 
@@ -360,7 +355,7 @@ class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 		try {
 			if (s != null) s.close();
 		} catch (IOException e) {
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 		}
 	}
 
@@ -369,7 +364,7 @@ class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 			File[] children = f.listFiles();
 			if (children != null) for (File child : children) listFiles(child);
 		} else {
-			LOG.info(f.getAbsolutePath() + " " + f.length());
+			LOG.info(f.getAbsolutePath());
 		}
 	}
 
@@ -402,7 +397,7 @@ class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 				ss = new ServerSocket();
 				ss.bind(new InetSocketAddress("127.0.0.1", port));
 			} catch (IOException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 				tryToClose(ss);
 				return;
 			}
@@ -428,7 +423,7 @@ class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 		try {
 			if (ss != null) ss.close();
 		} catch (IOException e) {
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 		} finally {
 			callback.transportDisabled();
 		}
@@ -447,7 +442,7 @@ class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 				response = controlConnection.addOnion(portLines);
 			else response = controlConnection.addOnion(privKey, portLines);
 		} catch (IOException e) {
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 			return;
 		}
 		if (!response.containsKey(HS_ADDRESS)) {
@@ -502,17 +497,6 @@ class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 		}
 	}
 
-	private void enableBridges(boolean enable) throws IOException {
-		if (enable) {
-			Collection<String> conf = new ArrayList<>();
-			conf.add("UseBridges 1");
-			conf.addAll(circumventionProvider.getBridges());
-			controlConnection.setConf(conf);
-		} else {
-			controlConnection.setConf("UseBridges", "0");
-		}
-	}
-
 	@Override
 	public void stop() {
 		running = false;
@@ -526,7 +510,7 @@ class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 				controlConnection.shutdownTor("TERM");
 				controlSocket.close();
 			} catch (IOException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 			}
 		}
 		wakeLock.release();
@@ -580,6 +564,7 @@ class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 		try {
 			if (LOG.isLoggable(INFO))
 				LOG.info("Connecting to " + scrubOnion(onion));
+			controlConnection.forgetHiddenService(onion);
 			s = torSocketFactory.createSocket(onion + ".onion", 80);
 			s.setSoTimeout(socketTimeout);
 			if (LOG.isLoggable(INFO))
@@ -656,6 +641,22 @@ class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 			LOG.info("Descriptor uploaded");
 	}
 
+	private static class WriteObserver extends FileObserver {
+
+		private final CountDownLatch latch;
+
+		private WriteObserver(File file, CountDownLatch latch) {
+			super(file.getAbsolutePath(), CLOSE_WRITE);
+			this.latch = latch;
+		}
+
+		@Override
+		public void onEvent(int event, @Nullable String path) {
+			stopWatching();
+			latch.countDown();
+		}
+	}
+
 	@Override
 	public void eventOccurred(Event e) {
 		if (e instanceof SettingsUpdatedEvent) {
@@ -676,8 +677,8 @@ class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 			boolean online = net != null && net.isConnected();
 			boolean wifi = online && net.getType() == TYPE_WIFI;
 			String country = locationUtils.getCurrentCountry();
-			boolean blocked =
-					circumventionProvider.isTorProbablyBlocked(country);
+			boolean blocked = TorNetworkMetadata.isTorProbablyBlocked(
+					country);
 			Settings s = callback.getSettings();
 			int network = s.getInt(PREF_TOR_NETWORK, PREF_TOR_NETWORK_ALWAYS);
 
@@ -691,26 +692,19 @@ class TorPlugin implements DuplexPlugin, EventHandler, EventListener {
 				if (!online) {
 					LOG.info("Disabling network, device is offline");
 					enableNetwork(false);
+				} else if (blocked) {
+					LOG.info("Disabling network, country is blocked");
+					enableNetwork(false);
 				} else if (network == PREF_TOR_NETWORK_NEVER
 						|| (network == PREF_TOR_NETWORK_WIFI && !wifi)) {
 					LOG.info("Disabling network due to data setting");
 					enableNetwork(false);
-				} else if (blocked) {
-					if (circumventionProvider.doBridgesWork(country)) {
-						LOG.info("Enabling network, using bridges");
-						enableBridges(true);
-						enableNetwork(true);
-					} else {
-						LOG.info("Disabling network, country is blocked");
-						enableNetwork(false);
-					}
 				} else {
 					LOG.info("Enabling network");
-					enableBridges(false);
 					enableNetwork(true);
 				}
 			} catch (IOException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 			}
 		});
 	}

bramble-android/src/main/java/org/briarproject/bramble/plugin/tor/TorPluginFactory.java

@@ -12,7 +12,6 @@ import org.briarproject.bramble.api.plugin.TransportId;
 import org.briarproject.bramble.api.plugin.duplex.DuplexPlugin;
 import org.briarproject.bramble.api.plugin.duplex.DuplexPluginCallback;
 import org.briarproject.bramble.api.plugin.duplex.DuplexPluginFactory;
-import org.briarproject.bramble.api.system.Clock;
 import org.briarproject.bramble.api.system.LocationUtils;
 import org.briarproject.bramble.util.AndroidUtils;
 
@@ -43,15 +42,11 @@ public class TorPluginFactory implements DuplexPluginFactory {
 	private final EventBus eventBus;
 	private final SocketFactory torSocketFactory;
 	private final BackoffFactory backoffFactory;
-	private final CircumventionProvider circumventionProvider;
-	private final Clock clock;
 
 	public TorPluginFactory(Executor ioExecutor,
 			ScheduledExecutorService scheduler, Context appContext,
 			LocationUtils locationUtils, EventBus eventBus,
-			SocketFactory torSocketFactory, BackoffFactory backoffFactory,
-			CircumventionProvider circumventionProvider,
-			Clock clock) {
+			SocketFactory torSocketFactory, BackoffFactory backoffFactory) {
 		this.ioExecutor = ioExecutor;
 		this.scheduler = scheduler;
 		this.appContext = appContext;
@@ -59,8 +54,6 @@ public class TorPluginFactory implements DuplexPluginFactory {
 		this.eventBus = eventBus;
 		this.torSocketFactory = torSocketFactory;
 		this.backoffFactory = backoffFactory;
-		this.circumventionProvider = circumventionProvider;
-		this.clock = clock;
 	}
 
 	@Override
@@ -97,8 +90,8 @@ public class TorPluginFactory implements DuplexPluginFactory {
 		Backoff backoff = backoffFactory.createBackoff(MIN_POLLING_INTERVAL,
 				MAX_POLLING_INTERVAL, BACKOFF_BASE);
 		TorPlugin plugin = new TorPlugin(ioExecutor, scheduler, appContext,
-				locationUtils, torSocketFactory, clock, backoff, callback,
-				architecture, circumventionProvider, MAX_LATENCY, MAX_IDLE_TIME);
+				locationUtils, torSocketFactory, backoff, callback,
+				architecture, MAX_LATENCY, MAX_IDLE_TIME);
 		eventBus.addListener(plugin);
 		return plugin;
 	}

bramble-android/src/main/java/org/briarproject/bramble/util/RenewableWakeLock.java

@@ -1,100 +0,0 @@
-package org.briarproject.bramble.util;
-
-import android.os.PowerManager;
-
-import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-
-import java.util.concurrent.ScheduledExecutorService;
-import java.util.concurrent.ScheduledFuture;
-import java.util.concurrent.TimeUnit;
-import java.util.logging.Logger;
-
-import javax.annotation.Nullable;
-import javax.annotation.concurrent.ThreadSafe;
-
-import static java.util.concurrent.TimeUnit.MILLISECONDS;
-import static java.util.logging.Level.INFO;
-
-@ThreadSafe
-@NotNullByDefault
-public class RenewableWakeLock {
-
-	private static final Logger LOG =
-			Logger.getLogger(RenewableWakeLock.class.getName());
-
-	/**
-	 * Automatically release the lock this many milliseconds after it's due
-	 * to have been replaced and released.
-	 */
-	private static final int SAFETY_MARGIN_MS = 10_000;
-
-	private final PowerManager powerManager;
-	private final ScheduledExecutorService scheduler;
-	private final int levelAndFlags;
-	private final String tag;
-	private final long durationMs;
-	private final Runnable renewTask;
-
-	private final Object lock = new Object();
-	@Nullable
-	private PowerManager.WakeLock wakeLock; // Locking: lock
-	@Nullable
-	private ScheduledFuture future; // Locking: lock
-
-	public RenewableWakeLock(PowerManager powerManager,
-			ScheduledExecutorService scheduler, int levelAndFlags, String tag,
-			long duration, TimeUnit timeUnit) {
-		this.powerManager = powerManager;
-		this.scheduler = scheduler;
-		this.levelAndFlags = levelAndFlags;
-		this.tag = tag;
-		durationMs = MILLISECONDS.convert(duration, timeUnit);
-		renewTask = this::renew;
-	}
-
-	public void acquire() {
-		if (LOG.isLoggable(INFO)) LOG.info("Acquiring wake lock " + tag);
-		synchronized (lock) {
-			if (wakeLock != null) {
-				LOG.info("Already acquired");
-				return;
-			}
-			wakeLock = powerManager.newWakeLock(levelAndFlags, tag);
-			wakeLock.setReferenceCounted(false);
-			wakeLock.acquire(durationMs + SAFETY_MARGIN_MS);
-			future = scheduler.schedule(renewTask, durationMs, MILLISECONDS);
-		}
-	}
-
-	private void renew() {
-		if (LOG.isLoggable(INFO)) LOG.info("Renewing wake lock " + tag);
-		synchronized (lock) {
-			if (wakeLock == null) {
-				LOG.info("Already released");
-				return;
-			}
-			PowerManager.WakeLock oldWakeLock = wakeLock;
-			wakeLock = powerManager.newWakeLock(levelAndFlags, tag);
-			wakeLock.setReferenceCounted(false);
-			wakeLock.acquire(durationMs + SAFETY_MARGIN_MS);
-			oldWakeLock.release();
-			future = scheduler.schedule(renewTask, durationMs, MILLISECONDS);
-		}
-	}
-
-	public void release() {
-		if (LOG.isLoggable(INFO)) LOG.info("Releasing wake lock " + tag);
-		synchronized (lock) {
-			if (wakeLock == null) {
-				LOG.info("Already released");
-				return;
-			}
-			if (future == null) throw new AssertionError();
-			future.cancel(false);
-			future = null;
-			wakeLock.release();
-			wakeLock = null;
-		}
-	}
-}
-

bramble-android/src/main/res/raw/bridges

@@ -1,8 +0,0 @@
-Bridge 131.252.210.150:8081 0E858AC201BF0F3FA3C462F64844CBFFC7297A42
-Bridge 67.205.189.122:8443 12D64D5D44E20169585E7378580C0D33A872AD98
-Bridge 45.32.148.146:8443 0CE016FB2462D8BF179AE71F7D702D09DEAC3F1D
-Bridge 148.251.90.59:7510 019F727CA6DCA6CA5C90B55E477B7D87981E75BC
-Bridge 195.91.239.8:9001 BA83F62551545655BBEBBFF353A45438D73FD45A
-Bridge 185.165.184.217:6429 64CC94BEC51254E4409AD059192833854CCB95F0
-Bridge 45.55.1.74:8443 6F18FEFBB0CAECD5ABA755312FCCB34FC11A7AB8
-Bridge 95.85.40.163:9001 40057BE9CF76B6C5BDBE713753468BE0A990DE9C

bramble-api/src/main/java/org/briarproject/bramble/api/lifecycle/IoExecutor.java

@@ -12,7 +12,7 @@ import static java.lang.annotation.RetentionPolicy.RUNTIME;
 
 /**
  * Annotation for injecting the executor for long-running IO tasks. Also used
- * for annotating methods that should run on the IO executor.
+ * for annotating methods that should run on the UI executor.
  * <p>
  * The contract of this executor is that tasks may be run concurrently, and
  * submitting a task will never block. Tasks may run indefinitely. Tasks

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

@@ -1,36 +0,0 @@
-package org.briarproject.bramble.util;
-
-import java.util.logging.Level;
-import java.util.logging.Logger;
-
-import static java.util.logging.Level.FINE;
-
-public class LogUtils {
-
-	private static final int NANOS_PER_MILLI = 1000 * 1000;
-
-	/**
-	 * Returns the elapsed time in milliseconds since some arbitrary
-	 * starting time. This is only useful for measuring elapsed time.
-	 */
-	public static long now() {
-		return System.nanoTime() / NANOS_PER_MILLI;
-	}
-
-	/**
-	 * Logs the duration of a task.
-	 * @param logger the logger to use
-	 * @param task a description of the task
-	 * @param start the start time of the task, as returned by {@link #now()}
-	 */
-	public static void logDuration(Logger logger, String task, long start) {
-		if (logger.isLoggable(FINE)) {
-			long duration = now() - start;
-			logger.fine(task + " took " + duration + " ms");
-		}
-	}
-
-	public static void logException(Logger logger, Level level, Throwable t) {
-		if (logger.isLoggable(level)) logger.log(level, t.toString(), t);
-	}
-}

bramble-core/src/main/java/org/briarproject/bramble/PoliteExecutor.java

@@ -5,12 +5,12 @@ import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
 import java.util.LinkedList;
 import java.util.Queue;
 import java.util.concurrent.Executor;
+import java.util.logging.Level;
 import java.util.logging.Logger;
 
 import javax.annotation.concurrent.GuardedBy;
 
 import static java.util.logging.Level.FINE;
-import static org.briarproject.bramble.util.LogUtils.now;
 
 /**
  * An {@link Executor} that delegates its tasks to another {@link Executor}
@@ -20,6 +20,8 @@ import static org.briarproject.bramble.util.LogUtils.now;
 @NotNullByDefault
 public class PoliteExecutor implements Executor {
 
+	private static final Level LOG_LEVEL = FINE;
+
 	private final Object lock = new Object();
 	@GuardedBy("lock")
 	private final Queue<Runnable> queue = new LinkedList<>();
@@ -47,11 +49,11 @@ public class PoliteExecutor implements Executor {
 
 	@Override
 	public void execute(Runnable r) {
-		long submitted = now();
+		long submitted = System.currentTimeMillis();
 		Runnable wrapped = () -> {
-			if (log.isLoggable(FINE)) {
-				long queued = now() - submitted;
-				log.fine("Queue time " + queued + " ms");
+			if (log.isLoggable(LOG_LEVEL)) {
+				long queued = System.currentTimeMillis() - submitted;
+				log.log(LOG_LEVEL, "Queue time " + queued + " ms");
 			}
 			try {
 				r.run();

bramble-core/src/main/java/org/briarproject/bramble/TimeLoggingExecutor.java

@@ -6,14 +6,16 @@ import java.util.concurrent.BlockingQueue;
 import java.util.concurrent.RejectedExecutionHandler;
 import java.util.concurrent.ThreadPoolExecutor;
 import java.util.concurrent.TimeUnit;
+import java.util.logging.Level;
 import java.util.logging.Logger;
 
 import static java.util.logging.Level.FINE;
-import static org.briarproject.bramble.util.LogUtils.now;
 
 @NotNullByDefault
 public class TimeLoggingExecutor extends ThreadPoolExecutor {
 
+	private static final Level LOG_LEVEL = FINE;
+
 	private final Logger log;
 
 	public TimeLoggingExecutor(String tag, int corePoolSize, int maxPoolSize,
@@ -27,15 +29,15 @@ public class TimeLoggingExecutor extends ThreadPoolExecutor {
 
 	@Override
 	public void execute(Runnable r) {
-		if (log.isLoggable(FINE)) {
-			long submitted = now();
+		if (log.isLoggable(LOG_LEVEL)) {
+			long submitted = System.currentTimeMillis();
 			super.execute(() -> {
-				long started = now();
+				long started = System.currentTimeMillis();
 				long queued = started - submitted;
-				log.fine("Queue time " + queued + " ms");
+				log.log(LOG_LEVEL, "Queue time " + queued + " ms");
 				r.run();
-				long executing = now() - started;
-				log.fine("Execution time " + executing + " ms");
+				long executing = System.currentTimeMillis() - started;
+				log.log(LOG_LEVEL, "Execution time " + executing + " ms");
 			});
 		} else {
 			super.execute(r);

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

@@ -46,7 +46,6 @@ import javax.inject.Inject;
 import static java.util.logging.Level.WARNING;
 import static org.briarproject.bramble.api.contact.RecordTypes.CONTACT_INFO;
 import static org.briarproject.bramble.api.identity.AuthorConstants.MAX_SIGNATURE_LENGTH;
-import static org.briarproject.bramble.util.LogUtils.logException;
 import static org.briarproject.bramble.util.ValidationUtils.checkLength;
 import static org.briarproject.bramble.util.ValidationUtils.checkSize;
 
@@ -123,7 +122,7 @@ class ContactExchangeTaskImpl extends Thread implements ContactExchangeTask {
 			in = conn.getReader().getInputStream();
 			out = conn.getWriter().getOutputStream();
 		} catch (IOException e) {
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 			listener.contactExchangeFailed();
 			tryToClose(conn);
 			return;
@@ -134,7 +133,7 @@ class ContactExchangeTaskImpl extends Thread implements ContactExchangeTask {
 		try {
 			localProperties = transportPropertyManager.getLocalProperties();
 		} catch (DbException e) {
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 			listener.contactExchangeFailed();
 			tryToClose(conn);
 			return;
@@ -195,7 +194,7 @@ class ContactExchangeTaskImpl extends Thread implements ContactExchangeTask {
 				LOG.info("End of stream");
 			}
 		} catch (IOException e) {
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 			listener.contactExchangeFailed();
 			tryToClose(conn);
 			return;
@@ -223,11 +222,11 @@ class ContactExchangeTaskImpl extends Thread implements ContactExchangeTask {
 			LOG.info("Pseudonym exchange succeeded");
 			listener.contactExchangeSucceeded(remoteInfo.author);
 		} catch (ContactExistsException e) {
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 			tryToClose(conn);
 			listener.duplicateContact(remoteInfo.author);
 		} catch (DbException e) {
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 			tryToClose(conn);
 			listener.contactExchangeFailed();
 		}
@@ -308,7 +307,7 @@ class ContactExchangeTaskImpl extends Thread implements ContactExchangeTask {
 			conn.getReader().dispose(true, true);
 			conn.getWriter().dispose(true);
 		} catch (IOException e) {
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 		}
 	}
 

bramble-core/src/main/java/org/briarproject/bramble/crypto/CryptoComponentImpl.java

@@ -32,8 +32,6 @@ import javax.inject.Inject;
 
 import static java.util.logging.Level.INFO;
 import static org.briarproject.bramble.util.ByteUtils.INT_32_BYTES;
-import static org.briarproject.bramble.util.LogUtils.logDuration;
-import static org.briarproject.bramble.util.LogUtils.now;
 
 @NotNullByDefault
 class CryptoComponentImpl implements CryptoComponent {
@@ -129,14 +127,16 @@ class CryptoComponentImpl implements CryptoComponent {
 			throw new IllegalArgumentException();
 		if (!(pub instanceof Curve25519PublicKey))
 			throw new IllegalArgumentException();
-		long start = now();
+		long now = System.currentTimeMillis();
 		byte[] secret = curve25519.calculateAgreement(pub.getEncoded(),
 				priv.getEncoded());
 		// If the shared secret is all zeroes, the public key is invalid
 		byte allZero = 0;
 		for (byte b : secret) allZero |= b;
 		if (allZero == 0) throw new GeneralSecurityException();
-		logDuration(LOG, "Deriving shared secret", start);
+		long duration = System.currentTimeMillis() - now;
+		if (LOG.isLoggable(INFO))
+			LOG.info("Deriving shared secret took " + duration + " ms");
 		return secret;
 	}
 

bramble-core/src/main/java/org/briarproject/bramble/crypto/ScryptKdf.java

@@ -10,8 +10,6 @@ import java.util.logging.Logger;
 import javax.inject.Inject;
 
 import static java.util.logging.Level.INFO;
-import static org.briarproject.bramble.util.LogUtils.logDuration;
-import static org.briarproject.bramble.util.LogUtils.now;
 
 class ScryptKdf implements PasswordBasedKdf {
 
@@ -52,11 +50,13 @@ class ScryptKdf implements PasswordBasedKdf {
 
 	@Override
 	public SecretKey deriveKey(String password, byte[] salt, int cost) {
-		long start = now();
+		long start = System.currentTimeMillis();
 		byte[] passwordBytes = StringUtils.toUtf8(password);
 		SecretKey k = new SecretKey(SCrypt.generate(passwordBytes, salt, cost,
 				BLOCK_SIZE, PARALLELIZATION, SecretKey.LENGTH));
-		logDuration(LOG, "Deriving key from password", start);
+		long duration = System.currentTimeMillis() - start;
+		if (LOG.isLoggable(INFO))
+			LOG.info("Deriving key from password took " + duration + " ms");
 		return k;
 	}
 }

bramble-core/src/main/java/org/briarproject/bramble/crypto/Sec1KeyParser.java

@@ -16,8 +16,7 @@ import java.util.logging.Logger;
 
 import javax.annotation.concurrent.Immutable;
 
-import static org.briarproject.bramble.util.LogUtils.logDuration;
-import static org.briarproject.bramble.util.LogUtils.now;
+import static java.util.logging.Level.INFO;
 
 /**
  * A key parser that uses the encoding defined in "SEC 1: Elliptic Curve
@@ -49,7 +48,7 @@ class Sec1KeyParser implements KeyParser {
 			throws GeneralSecurityException {
 		// The validation procedure comes from SEC 1, section 3.2.2.1. Note
 		// that SEC 1 parameter names are used below, not RFC 5639 names
-		long start = now();
+		long now = System.currentTimeMillis();
 		if (encodedKey.length != publicKeyBytes)
 			throw new GeneralSecurityException();
 		// The first byte must be 0x04
@@ -81,14 +80,16 @@ class Sec1KeyParser implements KeyParser {
 		// Construct a public key from the point (x, y) and the params
 		ECPublicKeyParameters k = new ECPublicKeyParameters(pub, params);
 		PublicKey p = new Sec1PublicKey(k);
-		logDuration(LOG, "Parsing public key", start);
+		long duration = System.currentTimeMillis() - now;
+		if (LOG.isLoggable(INFO))
+			LOG.info("Parsing public key took " + duration + " ms");
 		return p;
 	}
 
 	@Override
 	public PrivateKey parsePrivateKey(byte[] encodedKey)
 			throws GeneralSecurityException {
-		long start = now();
+		long now = System.currentTimeMillis();
 		if (encodedKey.length != privateKeyBytes)
 			throw new GeneralSecurityException();
 		BigInteger d = new BigInteger(1, encodedKey); // Positive signum
@@ -98,7 +99,9 @@ class Sec1KeyParser implements KeyParser {
 		// Construct a private key from the private value and the params
 		ECPrivateKeyParameters k = new ECPrivateKeyParameters(d, params);
 		PrivateKey p = new Sec1PrivateKey(k, keyBits);
-		logDuration(LOG, "Parsing private key", start);
+		long duration = System.currentTimeMillis() - now;
+		if (LOG.isLoggable(INFO))
+			LOG.info("Parsing private key took " + duration + " ms");
 		return p;
 	}
 }

bramble-core/src/main/java/org/briarproject/bramble/db/DatabaseComponentImpl.java

@@ -68,15 +68,13 @@ import javax.annotation.Nullable;
 import javax.annotation.concurrent.ThreadSafe;
 import javax.inject.Inject;
 
+import static java.util.logging.Level.FINE;
 import static java.util.logging.Level.WARNING;
 import static org.briarproject.bramble.api.sync.Group.Visibility.INVISIBLE;
 import static org.briarproject.bramble.api.sync.Group.Visibility.SHARED;
 import static org.briarproject.bramble.api.sync.ValidationManager.State.DELIVERED;
 import static org.briarproject.bramble.api.sync.ValidationManager.State.UNKNOWN;
 import static org.briarproject.bramble.db.DatabaseConstants.MAX_OFFERED_MESSAGES;
-import static org.briarproject.bramble.util.LogUtils.logDuration;
-import static org.briarproject.bramble.util.LogUtils.logException;
-import static org.briarproject.bramble.util.LogUtils.now;
 
 @ThreadSafe
 @NotNullByDefault
@@ -110,7 +108,7 @@ class DatabaseComponentImpl<T> implements DatabaseComponent {
 			try {
 				close();
 			} catch (DbException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 			}
 		});
 		return reopened;
@@ -127,13 +125,13 @@ class DatabaseComponentImpl<T> implements DatabaseComponent {
 		// Don't allow reentrant locking
 		if (lock.getReadHoldCount() > 0) throw new IllegalStateException();
 		if (lock.getWriteHoldCount() > 0) throw new IllegalStateException();
-		long start = now();
-		if (readOnly) {
-			lock.readLock().lock();
-			logDuration(LOG, "Waiting for read lock", start);
-		} else {
-			lock.writeLock().lock();
-			logDuration(LOG, "Waiting for write lock", start);
+		long start = System.currentTimeMillis();
+		if (readOnly) lock.readLock().lock();
+		else lock.writeLock().lock();
+		if (LOG.isLoggable(FINE)) {
+			long duration = System.currentTimeMillis() - start;
+			if (readOnly) LOG.fine("Waited " + duration + " ms for read lock");
+			else LOG.fine("Waited " + duration + " ms for write lock");
 		}
 		try {
 			return new Transaction(db.startTransaction(), readOnly);

bramble-core/src/main/java/org/briarproject/bramble/db/JdbcDatabase.java

@@ -66,7 +66,6 @@ import static org.briarproject.bramble.api.sync.ValidationManager.State.UNKNOWN;
 import static org.briarproject.bramble.db.DatabaseConstants.DB_SETTINGS_NAMESPACE;
 import static org.briarproject.bramble.db.DatabaseConstants.SCHEMA_VERSION_KEY;
 import static org.briarproject.bramble.db.ExponentialBackoff.calculateExpiry;
-import static org.briarproject.bramble.util.LogUtils.logException;
 
 /**
  * A generic database implementation that can be used with any JDBC-compatible
@@ -405,7 +404,7 @@ abstract class JdbcDatabase implements Database<Connection> {
 		try {
 			if (rs != null) rs.close();
 		} catch (SQLException e) {
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 		}
 	}
 
@@ -413,7 +412,7 @@ abstract class JdbcDatabase implements Database<Connection> {
 		try {
 			if (s != null) s.close();
 		} catch (SQLException e) {
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 		}
 	}
 
@@ -510,11 +509,12 @@ abstract class JdbcDatabase implements Database<Connection> {
 			}
 		} catch (SQLException e) {
 			// Try to close the connection
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 			try {
 				txn.close();
 			} catch (SQLException e1) {
-				logException(LOG, WARNING, e1);
+				if (LOG.isLoggable(WARNING))
+					LOG.log(WARNING, e1.toString(), e1);
 			}
 			// Whatever happens, allow the database to close
 			connectionsLock.lock();

bramble-core/src/main/java/org/briarproject/bramble/db/Migration38_39.java

@@ -10,7 +10,6 @@ import java.util.logging.Logger;
 import javax.annotation.Nullable;
 
 import static java.util.logging.Level.WARNING;
-import static org.briarproject.bramble.util.LogUtils.logException;
 
 class Migration38_39 implements Migration<Connection> {
 
@@ -49,7 +48,7 @@ class Migration38_39 implements Migration<Connection> {
 		try {
 			if (s != null) s.close();
 		} catch (SQLException e) {
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 		}
 	}
 }

bramble-core/src/main/java/org/briarproject/bramble/keyagreement/KeyAgreementConnector.java

@@ -31,7 +31,6 @@ import javax.annotation.Nullable;
 import static java.util.logging.Level.INFO;
 import static java.util.logging.Level.WARNING;
 import static org.briarproject.bramble.api.keyagreement.KeyAgreementConstants.CONNECTION_TIMEOUT;
-import static org.briarproject.bramble.util.LogUtils.logException;
 
 @NotNullByDefault
 class KeyAgreementConnector {
@@ -135,7 +134,7 @@ class KeyAgreementConnector {
 			Thread.currentThread().interrupt();
 			return null;
 		} catch (IOException e) {
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 			return null;
 		} finally {
 			stopListening();

bramble-core/src/main/java/org/briarproject/bramble/keyagreement/KeyAgreementTaskImpl.java

@@ -28,7 +28,6 @@ import java.util.logging.Logger;
 import javax.inject.Inject;
 
 import static java.util.logging.Level.WARNING;
-import static org.briarproject.bramble.util.LogUtils.logException;
 
 @MethodsNotNullByDefault
 @ParametersNotNullByDefault
@@ -121,11 +120,13 @@ class KeyAgreementTaskImpl extends Thread implements KeyAgreementTask,
 			// Broadcast result to caller
 			eventBus.broadcast(new KeyAgreementFinishedEvent(result));
 		} catch (AbortException e) {
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING))
+				LOG.log(WARNING, e.toString(), e);
 			// Notify caller that the protocol was aborted
 			eventBus.broadcast(new KeyAgreementAbortedEvent(e.receivedAbort));
 		} catch (IOException e) {
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING))
+				LOG.log(WARNING, e.toString(), e);
 			// Notify caller that the connection failed
 			eventBus.broadcast(new KeyAgreementFailedEvent());
 		}

bramble-core/src/main/java/org/briarproject/bramble/keyagreement/KeyAgreementTransport.java

@@ -20,7 +20,6 @@ import static org.briarproject.bramble.api.keyagreement.KeyAgreementConstants.PR
 import static org.briarproject.bramble.api.keyagreement.RecordTypes.ABORT;
 import static org.briarproject.bramble.api.keyagreement.RecordTypes.CONFIRM;
 import static org.briarproject.bramble.api.keyagreement.RecordTypes.KEY;
-import static org.briarproject.bramble.util.LogUtils.logException;
 
 /**
  * Handles the sending and receiving of BQP records.
@@ -73,7 +72,7 @@ class KeyAgreementTransport {
 		try {
 			writeRecord(ABORT, new byte[0]);
 		} catch (IOException e) {
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 			exception = true;
 		}
 		tryToClose(exception);
@@ -84,7 +83,7 @@ class KeyAgreementTransport {
 			kac.getConnection().getReader().dispose(exception, true);
 			kac.getConnection().getWriter().dispose(exception);
 		} catch (IOException e) {
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 		}
 	}
 

bramble-core/src/main/java/org/briarproject/bramble/lifecycle/LifecycleManagerImpl.java

@@ -30,7 +30,6 @@ import javax.annotation.Nullable;
 import javax.annotation.concurrent.ThreadSafe;
 import javax.inject.Inject;
 
-import static java.util.logging.Level.FINE;
 import static java.util.logging.Level.INFO;
 import static java.util.logging.Level.WARNING;
 import static org.briarproject.bramble.api.lifecycle.LifecycleManager.LifecycleState.MIGRATING_DATABASE;
@@ -44,9 +43,6 @@ import static org.briarproject.bramble.api.lifecycle.LifecycleManager.StartResul
 import static org.briarproject.bramble.api.lifecycle.LifecycleManager.StartResult.DB_ERROR;
 import static org.briarproject.bramble.api.lifecycle.LifecycleManager.StartResult.SERVICE_ERROR;
 import static org.briarproject.bramble.api.lifecycle.LifecycleManager.StartResult.SUCCESS;
-import static org.briarproject.bramble.util.LogUtils.logDuration;
-import static org.briarproject.bramble.util.LogUtils.logException;
-import static org.briarproject.bramble.util.LogUtils.now;
 
 @ThreadSafe
 @NotNullByDefault
@@ -105,20 +101,24 @@ class LifecycleManagerImpl implements LifecycleManager, MigrationListener {
 	}
 
 	private LocalAuthor createLocalAuthor(String nickname) {
-		long start = now();
+		long now = System.currentTimeMillis();
 		KeyPair keyPair = crypto.generateSignatureKeyPair();
 		byte[] publicKey = keyPair.getPublic().getEncoded();
 		byte[] privateKey = keyPair.getPrivate().getEncoded();
 		LocalAuthor localAuthor = authorFactory
 				.createLocalAuthor(nickname, publicKey, privateKey);
-		logDuration(LOG, "Creating local author", start);
+		long duration = System.currentTimeMillis() - now;
+		if (LOG.isLoggable(INFO))
+			LOG.info("Creating local author took " + duration + " ms");
 		return localAuthor;
 	}
 
 	private void registerLocalAuthor(LocalAuthor author) throws DbException {
-		long start = now();
+		long now = System.currentTimeMillis();
 		identityManager.registerLocalAuthor(author);
-		logDuration(LOG, "Registering local author", start);
+		long duration = System.currentTimeMillis() - now;
+		if (LOG.isLoggable(INFO))
+			LOG.info("Registering local author took " + duration + " ms");
 	}
 
 	@Override
@@ -129,11 +129,15 @@ class LifecycleManagerImpl implements LifecycleManager, MigrationListener {
 		}
 		try {
 			LOG.info("Starting services");
-			long start = now();
+			long start = System.currentTimeMillis();
 
 			boolean reopened = db.open(this);
-			if (reopened) logDuration(LOG, "Reopening database", start);
-			else logDuration(LOG, "Creating database", start);
+			long duration = System.currentTimeMillis() - start;
+			if (LOG.isLoggable(INFO)) {
+				if (reopened)
+					LOG.info("Reopening database took " + duration + " ms");
+				else LOG.info("Creating database took " + duration + " ms");
+			}
 
 			if (nickname != null) {
 				registerLocalAuthor(createLocalAuthor(nickname));
@@ -146,11 +150,13 @@ class LifecycleManagerImpl implements LifecycleManager, MigrationListener {
 			Transaction txn = db.startTransaction(false);
 			try {
 				for (Client c : clients) {
-					start = now();
+					start = System.currentTimeMillis();
 					c.createLocalState(txn);
-					if (LOG.isLoggable(FINE)) {
-						logDuration(LOG, "Starting client "
-								+ c.getClass().getSimpleName(), start);
+					duration = System.currentTimeMillis() - start;
+					if (LOG.isLoggable(INFO)) {
+						LOG.info("Starting client "
+								+ c.getClass().getSimpleName()
+								+ " took " + duration + " ms");
 					}
 				}
 				db.commitTransaction(txn);
@@ -158,11 +164,12 @@ class LifecycleManagerImpl implements LifecycleManager, MigrationListener {
 				db.endTransaction(txn);
 			}
 			for (Service s : services) {
-				start = now();
+				start = System.currentTimeMillis();
 				s.startService();
-				if (LOG.isLoggable(FINE)) {
-					logDuration(LOG, "Starting service "
-							+ s.getClass().getSimpleName(), start);
+				duration = System.currentTimeMillis() - start;
+				if (LOG.isLoggable(INFO)) {
+					LOG.info("Starting service " + s.getClass().getSimpleName()
+							+ " took " + duration + " ms");
 				}
 			}
 
@@ -171,16 +178,16 @@ class LifecycleManagerImpl implements LifecycleManager, MigrationListener {
 			eventBus.broadcast(new LifecycleEvent(RUNNING));
 			return SUCCESS;
 		} catch (DataTooOldException e) {
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 			return DATA_TOO_OLD_ERROR;
 		} catch (DataTooNewException e) {
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 			return DATA_TOO_NEW_ERROR;
 		} catch (DbException e) {
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 			return DB_ERROR;
 		} catch (ServiceException e) {
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 			return SERVICE_ERROR;
 		} finally {
 			startStopSemaphore.release();
@@ -206,26 +213,29 @@ class LifecycleManagerImpl implements LifecycleManager, MigrationListener {
 			state = STOPPING;
 			eventBus.broadcast(new LifecycleEvent(STOPPING));
 			for (Service s : services) {
-				long start = now();
+				long start = System.currentTimeMillis();
 				s.stopService();
-				if (LOG.isLoggable(FINE)) {
-					logDuration(LOG, "Stopping service "
-							+ s.getClass().getSimpleName(), start);
+				long duration = System.currentTimeMillis() - start;
+				if (LOG.isLoggable(INFO)) {
+					LOG.info("Stopping service " + s.getClass().getSimpleName()
+							+ " took " + duration + " ms");
 				}
 			}
 			for (ExecutorService e : executors) {
-				if (LOG.isLoggable(FINE)) {
-					LOG.fine("Stopping executor "
+				if (LOG.isLoggable(INFO)) {
+					LOG.info("Stopping executor "
 							+ e.getClass().getSimpleName());
 				}
 				e.shutdownNow();
 			}
-			long start = now();
+			long start = System.currentTimeMillis();
 			db.close();
-			logDuration(LOG, "Closing database", start);
+			long duration = System.currentTimeMillis() - start;
+			if (LOG.isLoggable(INFO))
+				LOG.info("Closing database took " + duration + " ms");
 			shutdownLatch.countDown();
 		} catch (DbException | ServiceException e) {
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 		} finally {
 			startStopSemaphore.release();
 		}

bramble-core/src/main/java/org/briarproject/bramble/plugin/ConnectionManagerImpl.java

@@ -27,7 +27,6 @@ import javax.inject.Inject;
 
 import static java.util.logging.Level.WARNING;
 import static org.briarproject.bramble.api.transport.TransportConstants.TAG_LENGTH;
-import static org.briarproject.bramble.util.LogUtils.logException;
 
 class ConnectionManagerImpl implements ConnectionManager {
 
@@ -136,7 +135,7 @@ class ConnectionManagerImpl implements ConnectionManager {
 				byte[] tag = readTag(reader);
 				ctx = keyManager.getStreamContext(transportId, tag);
 			} catch (IOException | DbException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 				disposeReader(true, false);
 				return;
 			}
@@ -152,7 +151,7 @@ class ConnectionManagerImpl implements ConnectionManager {
 				createIncomingSession(ctx, reader).run();
 				disposeReader(false, true);
 			} catch (IOException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 				disposeReader(true, true);
 			} finally {
 				connectionRegistry.unregisterConnection(contactId, transportId,
@@ -164,7 +163,7 @@ class ConnectionManagerImpl implements ConnectionManager {
 			try {
 				reader.dispose(exception, recognised);
 			} catch (IOException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 			}
 		}
 	}
@@ -189,7 +188,7 @@ class ConnectionManagerImpl implements ConnectionManager {
 			try {
 				ctx = keyManager.getStreamContext(contactId, transportId);
 			} catch (DbException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 				disposeWriter(true);
 				return;
 			}
@@ -205,7 +204,7 @@ class ConnectionManagerImpl implements ConnectionManager {
 				createSimplexOutgoingSession(ctx, writer).run();
 				disposeWriter(false);
 			} catch (IOException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 				disposeWriter(true);
 			} finally {
 				connectionRegistry.unregisterConnection(contactId, transportId,
@@ -217,7 +216,7 @@ class ConnectionManagerImpl implements ConnectionManager {
 			try {
 				writer.dispose(exception);
 			} catch (IOException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 			}
 		}
 	}
@@ -247,7 +246,7 @@ class ConnectionManagerImpl implements ConnectionManager {
 				byte[] tag = readTag(reader);
 				ctx = keyManager.getStreamContext(transportId, tag);
 			} catch (IOException | DbException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 				disposeReader(true, false);
 				return;
 			}
@@ -266,7 +265,7 @@ class ConnectionManagerImpl implements ConnectionManager {
 				incomingSession.run();
 				disposeReader(false, true);
 			} catch (IOException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 				disposeReader(true, true);
 			} finally {
 				connectionRegistry.unregisterConnection(contactId, transportId,
@@ -280,7 +279,7 @@ class ConnectionManagerImpl implements ConnectionManager {
 			try {
 				ctx = keyManager.getStreamContext(contactId, transportId);
 			} catch (DbException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 				disposeWriter(true);
 				return;
 			}
@@ -295,7 +294,7 @@ class ConnectionManagerImpl implements ConnectionManager {
 				outgoingSession.run();
 				disposeWriter(false);
 			} catch (IOException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 				disposeWriter(true);
 			}
 		}
@@ -306,7 +305,7 @@ class ConnectionManagerImpl implements ConnectionManager {
 			try {
 				reader.dispose(exception, recognised);
 			} catch (IOException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 			}
 		}
 
@@ -318,7 +317,7 @@ class ConnectionManagerImpl implements ConnectionManager {
 			try {
 				writer.dispose(exception);
 			} catch (IOException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 			}
 		}
 	}
@@ -348,7 +347,7 @@ class ConnectionManagerImpl implements ConnectionManager {
 			try {
 				ctx = keyManager.getStreamContext(contactId, transportId);
 			} catch (DbException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 				disposeWriter(true);
 				return;
 			}
@@ -365,7 +364,7 @@ class ConnectionManagerImpl implements ConnectionManager {
 				outgoingSession.run();
 				disposeWriter(false);
 			} catch (IOException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 				disposeWriter(true);
 			}
 		}
@@ -377,7 +376,7 @@ class ConnectionManagerImpl implements ConnectionManager {
 				byte[] tag = readTag(reader);
 				ctx = keyManager.getStreamContext(transportId, tag);
 			} catch (IOException | DbException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 				disposeReader(true, false);
 				return;
 			}
@@ -401,7 +400,7 @@ class ConnectionManagerImpl implements ConnectionManager {
 				incomingSession.run();
 				disposeReader(false, true);
 			} catch (IOException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 				disposeReader(true, true);
 			} finally {
 				connectionRegistry.unregisterConnection(contactId, transportId,
@@ -415,7 +414,7 @@ class ConnectionManagerImpl implements ConnectionManager {
 			try {
 				reader.dispose(exception, recognised);
 			} catch (IOException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 			}
 		}
 
@@ -427,7 +426,7 @@ class ConnectionManagerImpl implements ConnectionManager {
 			try {
 				writer.dispose(exception);
 			} catch (IOException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 			}
 		}
 	}

bramble-core/src/main/java/org/briarproject/bramble/plugin/PluginManagerImpl.java

@@ -49,12 +49,8 @@ import java.util.logging.Logger;
 import javax.annotation.concurrent.ThreadSafe;
 import javax.inject.Inject;
 
-import static java.util.logging.Level.FINE;
 import static java.util.logging.Level.INFO;
 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;
 
 @ThreadSafe
 @NotNullByDefault
@@ -209,16 +205,17 @@ class PluginManagerImpl implements PluginManager, Service {
 		@Override
 		public void run() {
 			try {
-				long start = now();
+				long start = System.currentTimeMillis();
 				plugin.start();
-				if (LOG.isLoggable(FINE)) {
-					logDuration(LOG, "Starting plugin " + plugin.getId(),
-							start);
+				long duration = System.currentTimeMillis() - start;
+				if (LOG.isLoggable(INFO)) {
+					LOG.info("Starting plugin " + plugin.getId() + " took " +
+							duration + " ms");
 				}
 			} catch (PluginException e) {
 				if (LOG.isLoggable(WARNING)) {
 					LOG.warning("Plugin " + plugin.getId() + " did not start");
-					logException(LOG, WARNING, e);
+					LOG.log(WARNING, e.toString(), e);
 				}
 			} finally {
 				startLatch.countDown();
@@ -246,11 +243,12 @@ class PluginManagerImpl implements PluginManager, Service {
 				// Wait for the plugin to finish starting
 				startLatch.await();
 				// Stop the plugin
-				long start = now();
+				long start = System.currentTimeMillis();
 				plugin.stop();
-				if (LOG.isLoggable(FINE)) {
-					logDuration(LOG, "Stopping plugin " + plugin.getId(),
-							start);
+				long duration = System.currentTimeMillis() - start;
+				if (LOG.isLoggable(INFO)) {
+					LOG.info("Stopping plugin " + plugin.getId()
+							+ " took " + duration + " ms");
 				}
 			} catch (InterruptedException e) {
 				LOG.warning("Interrupted while waiting for plugin to stop");
@@ -258,7 +256,7 @@ class PluginManagerImpl implements PluginManager, Service {
 			} catch (PluginException e) {
 				if (LOG.isLoggable(WARNING)) {
 					LOG.warning("Plugin " + plugin.getId() + " did not stop");
-					logException(LOG, WARNING, e);
+					LOG.log(WARNING, e.toString(), e);
 				}
 			} finally {
 				stopLatch.countDown();
@@ -280,7 +278,7 @@ class PluginManagerImpl implements PluginManager, Service {
 			try {
 				return settingsManager.getSettings(id.getString());
 			} catch (DbException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 				return new Settings();
 			}
 		}
@@ -290,7 +288,7 @@ class PluginManagerImpl implements PluginManager, Service {
 			try {
 				return transportPropertyManager.getLocalProperties(id);
 			} catch (DbException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 				return new TransportProperties();
 			}
 		}
@@ -300,7 +298,7 @@ class PluginManagerImpl implements PluginManager, Service {
 			try {
 				settingsManager.mergeSettings(s, id.getString());
 			} catch (DbException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 			}
 		}
 
@@ -309,7 +307,7 @@ class PluginManagerImpl implements PluginManager, Service {
 			try {
 				transportPropertyManager.mergeLocalProperties(id, p);
 			} catch (DbException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 			}
 		}
 

bramble-core/src/main/java/org/briarproject/bramble/plugin/Poller.java

@@ -28,7 +28,9 @@ import org.briarproject.bramble.api.system.Scheduler;
 import java.security.SecureRandom;
 import java.util.Collection;
 import java.util.HashMap;
+import java.util.HashSet;
 import java.util.Map;
+import java.util.Set;
 import java.util.concurrent.Executor;
 import java.util.concurrent.Future;
 import java.util.concurrent.ScheduledExecutorService;
@@ -41,7 +43,6 @@ import javax.annotation.concurrent.ThreadSafe;
 import static java.util.concurrent.TimeUnit.MILLISECONDS;
 import static java.util.logging.Level.INFO;
 import static java.util.logging.Level.WARNING;
-import static org.briarproject.bramble.util.LogUtils.logException;
 
 @ThreadSafe
 @NotNullByDefault
@@ -59,6 +60,7 @@ class Poller implements EventListener {
 	private final Clock clock;
 	private final Lock lock;
 	private final Map<TransportId, ScheduledPollTask> tasks; // Locking: lock
+	private final Set<TransportId> polling; // Locking: lock
 
 	Poller(@IoExecutor Executor ioExecutor,
 			@Scheduler ScheduledExecutorService scheduler,
@@ -76,6 +78,7 @@ class Poller implements EventListener {
 		this.clock = clock;
 		lock = new ReentrantLock();
 		tasks = new HashMap<>();
+		polling = new HashSet<>();
 	}
 
 	@Override
@@ -135,7 +138,7 @@ class Poller implements EventListener {
 				if (w != null)
 					connectionManager.manageOutgoingConnection(c, t, w);
 			} catch (DbException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 			}
 		});
 	}
@@ -151,7 +154,7 @@ class Poller implements EventListener {
 				if (d != null)
 					connectionManager.manageOutgoingConnection(c, t, d);
 			} catch (DbException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 			}
 		});
 	}
@@ -212,7 +215,7 @@ class Poller implements EventListener {
 			remote.keySet().removeAll(connected);
 			if (!remote.isEmpty()) p.poll(remote);
 		} catch (DbException e) {
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 		}
 	}
 
@@ -242,20 +245,33 @@ class Poller implements EventListener {
 		@Override
 		@IoExecutor
 		public void run() {
+			TransportId t = plugin.getId();
+			boolean shouldPoll;
 			lock.lock();
 			try {
-				TransportId t = plugin.getId();
 				ScheduledPollTask scheduled = tasks.get(t);
 				if (scheduled != null && scheduled.task != this)
 					return; // Replaced by another task
 				tasks.remove(t);
+				// Don't poll again if last poll is still running
+				shouldPoll = polling.add(t);
 			} finally {
 				lock.unlock();
 			}
 			int delay = plugin.getPollingInterval();
 			if (randomiseNext) delay = (int) (delay * random.nextDouble());
 			schedule(plugin, delay, false);
-			poll(plugin);
+			if (shouldPoll) {
+				poll(plugin);
+			} else if (LOG.isLoggable(INFO)) {
+				LOG.info("Last poll for " + t + " is still running");
+			}
+			lock.lock();
+			try {
+				polling.remove(t);
+			} finally {
+				lock.unlock();
+			}
 		}
 	}
 }

bramble-core/src/main/java/org/briarproject/bramble/plugin/bluetooth/BluetoothConnectionLimiterImpl.java

@@ -13,7 +13,6 @@ import javax.annotation.concurrent.ThreadSafe;
 
 import static java.util.logging.Level.INFO;
 import static java.util.logging.Level.WARNING;
-import static org.briarproject.bramble.util.LogUtils.logException;
 
 @NotNullByDefault
 @ThreadSafe
@@ -93,7 +92,7 @@ class BluetoothConnectionLimiterImpl implements BluetoothConnectionLimiter {
 			conn.getWriter().dispose(false);
 			conn.getReader().dispose(false, false);
 		} catch (IOException e) {
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 		}
 	}
 

bramble-core/src/main/java/org/briarproject/bramble/plugin/bluetooth/BluetoothPlugin.java

@@ -26,8 +26,10 @@ import org.briarproject.bramble.util.StringUtils;
 
 import java.io.IOException;
 import java.security.SecureRandom;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
 import java.util.Map;
-import java.util.Map.Entry;
 import java.util.UUID;
 import java.util.concurrent.Executor;
 import java.util.concurrent.atomic.AtomicBoolean;
@@ -43,7 +45,6 @@ import static org.briarproject.bramble.api.plugin.BluetoothConstants.PREF_BT_ENA
 import static org.briarproject.bramble.api.plugin.BluetoothConstants.PROP_ADDRESS;
 import static org.briarproject.bramble.api.plugin.BluetoothConstants.PROP_UUID;
 import static org.briarproject.bramble.api.plugin.BluetoothConstants.UUID_BYTES;
-import static org.briarproject.bramble.util.LogUtils.logException;
 import static org.briarproject.bramble.util.PrivacyUtils.scrubMacAddress;
 
 @MethodsNotNullByDefault
@@ -53,6 +54,12 @@ abstract class BluetoothPlugin<SS> implements DuplexPlugin, EventListener {
 	private static final Logger LOG =
 			Logger.getLogger(BluetoothPlugin.class.getName());
 
+	/**
+	 * How many milliseconds to pause between connection attempts when
+	 * polling, to avoid interfering with other Bluetooth or wifi connections.
+	 */
+	private static final int POLLING_PAUSE_MS = 1000;
+
 	final BluetoothConnectionLimiter connectionLimiter;
 
 	private final Executor ioExecutor;
@@ -170,7 +177,7 @@ abstract class BluetoothPlugin<SS> implements DuplexPlugin, EventListener {
 			try {
 				ss = openServerSocket(contactConnectionsUuid);
 			} catch (IOException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 				return;
 			}
 			if (!isRunning() || !shouldAllowContactConnections()) {
@@ -253,24 +260,39 @@ abstract class BluetoothPlugin<SS> implements DuplexPlugin, EventListener {
 	public void poll(Map<ContactId, TransportProperties> contacts) {
 		if (!isRunning() || !shouldAllowContactConnections()) return;
 		backoff.increment();
-		// Try to connect to known devices in parallel
-		for (Entry<ContactId, TransportProperties> e : contacts.entrySet()) {
-			String address = e.getValue().get(PROP_ADDRESS);
-			if (StringUtils.isNullOrEmpty(address)) continue;
-			String uuid = e.getValue().get(PROP_UUID);
-			if (StringUtils.isNullOrEmpty(uuid)) continue;
-			ContactId c = e.getKey();
-			ioExecutor.execute(() -> {
+		// Try to connect to known devices in a random order
+		List<ContactId> keys = new ArrayList<>(contacts.keySet());
+		Collections.shuffle(keys);
+		ioExecutor.execute(() -> {
+			boolean first = true;
+			for (ContactId c : keys) {
 				if (!isRunning() || !shouldAllowContactConnections()) return;
 				if (!connectionLimiter.canOpenContactConnection()) return;
+				TransportProperties p = contacts.get(c);
+				String address = p.get(PROP_ADDRESS);
+				if (StringUtils.isNullOrEmpty(address)) continue;
+				String uuid = p.get(PROP_UUID);
+				if (StringUtils.isNullOrEmpty(uuid)) continue;
+				// Pause between connection attempts
+				if (first) {
+					first = false;
+				} else {
+					try {
+						Thread.sleep(POLLING_PAUSE_MS);
+					} catch (InterruptedException ex) {
+						LOG.info("Interrupted while polling");
+						Thread.currentThread().interrupt();
+						return;
+					}
+				}
 				DuplexTransportConnection conn = connect(address, uuid);
 				if (conn != null) {
 					backoff.reset();
 					if (connectionLimiter.contactConnectionOpened(conn))
 						callback.outgoingConnectionCreated(c, conn);
 				}
-			});
-		}
+			}
+		});
 	}
 
 	@Nullable
@@ -337,7 +359,7 @@ abstract class BluetoothPlugin<SS> implements DuplexPlugin, EventListener {
 		try {
 			ss = openServerSocket(uuid);
 		} catch (IOException e) {
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 			return null;
 		}
 		if (!isRunning()) {

bramble-core/src/main/java/org/briarproject/bramble/plugin/file/FilePlugin.java

@@ -15,7 +15,6 @@ import java.util.logging.Logger;
 
 import static java.util.logging.Level.WARNING;
 import static org.briarproject.bramble.api.plugin.FileConstants.PROP_PATH;
-import static org.briarproject.bramble.util.LogUtils.logException;
 import static org.briarproject.bramble.util.StringUtils.isNullOrEmpty;
 
 @NotNullByDefault
@@ -52,7 +51,7 @@ abstract class FilePlugin implements SimplexPlugin {
 			FileInputStream in = new FileInputStream(file);
 			return new FileTransportReader(file, in, this);
 		} catch (IOException e) {
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 			return null;
 		}
 	}
@@ -71,7 +70,7 @@ abstract class FilePlugin implements SimplexPlugin {
 			FileOutputStream out = new FileOutputStream(file);
 			return new FileTransportWriter(file, out, this);
 		} catch (IOException e) {
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 			return null;
 		}
 	}

bramble-core/src/main/java/org/briarproject/bramble/plugin/file/FileTransportReader.java

@@ -9,7 +9,6 @@ import java.io.InputStream;
 import java.util.logging.Logger;
 
 import static java.util.logging.Level.WARNING;
-import static org.briarproject.bramble.util.LogUtils.logException;
 
 @NotNullByDefault
 class FileTransportReader implements TransportConnectionReader {
@@ -37,7 +36,7 @@ class FileTransportReader implements TransportConnectionReader {
 		try {
 			in.close();
 		} catch (IOException e) {
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 		}
 		plugin.readerFinished(file, exception, recognised);
 	}

bramble-core/src/main/java/org/briarproject/bramble/plugin/file/FileTransportWriter.java

@@ -9,7 +9,6 @@ import java.io.OutputStream;
 import java.util.logging.Logger;
 
 import static java.util.logging.Level.WARNING;
-import static org.briarproject.bramble.util.LogUtils.logException;
 
 @NotNullByDefault
 class FileTransportWriter implements TransportConnectionWriter {
@@ -47,7 +46,7 @@ class FileTransportWriter implements TransportConnectionWriter {
 		try {
 			out.close();
 		} catch (IOException e) {
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 		}
 		plugin.writerFinished(file, exception);
 	}

bramble-core/src/main/java/org/briarproject/bramble/plugin/tcp/LanTcpPlugin.java

@@ -35,7 +35,6 @@ import static org.briarproject.bramble.api.plugin.LanTcpConstants.ID;
 import static org.briarproject.bramble.api.plugin.LanTcpConstants.PREF_LAN_IP_PORTS;
 import static org.briarproject.bramble.api.plugin.LanTcpConstants.PROP_IP_PORTS;
 import static org.briarproject.bramble.util.ByteUtils.MAX_16_BIT_UNSIGNED;
-import static org.briarproject.bramble.util.LogUtils.logException;
 import static org.briarproject.bramble.util.PrivacyUtils.scrubSocketAddress;
 
 @NotNullByDefault
@@ -296,7 +295,7 @@ class LanTcpPlugin extends TcpPlugin {
 			try {
 				ss.close();
 			} catch (IOException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 			}
 		}
 	}

bramble-core/src/main/java/org/briarproject/bramble/plugin/tcp/PortMapperImpl.java

@@ -17,7 +17,6 @@ import javax.xml.parsers.ParserConfigurationException;
 
 import static java.util.logging.Level.INFO;
 import static java.util.logging.Level.WARNING;
-import static org.briarproject.bramble.util.LogUtils.logException;
 import static org.briarproject.bramble.util.PrivacyUtils.scrubInetAddress;
 
 @ThreadSafe
@@ -60,7 +59,7 @@ class PortMapperImpl implements PortMapper {
 			if (externalString != null)
 				external = InetAddress.getByName(externalString);
 		} catch (IOException | SAXException e) {
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 		}
 		return new MappingResult(internal, external, port, succeeded);
 	}
@@ -77,7 +76,7 @@ class PortMapperImpl implements PortMapper {
 		try {
 			d.discover();
 		} catch (IOException | SAXException | ParserConfigurationException e) {
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 		}
 		gateway = d.getValidGateway();
 	}
@@ -88,7 +87,7 @@ class PortMapperImpl implements PortMapper {
 			if (LOG.isLoggable(INFO))
 				LOG.info("Deleted mapping for port " + port);
 		} catch (IOException | SAXException e) {
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 		}
 	}
 }

bramble-core/src/main/java/org/briarproject/bramble/plugin/tcp/TcpPlugin.java

@@ -37,7 +37,6 @@ import javax.annotation.Nullable;
 
 import static java.util.logging.Level.INFO;
 import static java.util.logging.Level.WARNING;
-import static org.briarproject.bramble.util.LogUtils.logException;
 import static org.briarproject.bramble.util.PrivacyUtils.scrubSocketAddress;
 
 @MethodsNotNullByDefault
@@ -153,7 +152,7 @@ abstract class TcpPlugin implements DuplexPlugin {
 		try {
 			if (ss != null) ss.close();
 		} catch (IOException e) {
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 		} finally {
 			callback.transportDisabled();
 		}
@@ -307,7 +306,7 @@ abstract class TcpPlugin implements DuplexPlugin {
 		try {
 			ifaces = Collections.list(NetworkInterface.getNetworkInterfaces());
 		} catch (SocketException e) {
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 			return Collections.emptyList();
 		}
 		List<InetAddress> addrs = new ArrayList<>();

bramble-core/src/main/java/org/briarproject/bramble/reliability/ReliabilityLayerImpl.java

@@ -16,7 +16,6 @@ import java.util.logging.Logger;
 
 import static java.util.concurrent.TimeUnit.MILLISECONDS;
 import static java.util.logging.Level.WARNING;
-import static org.briarproject.bramble.util.LogUtils.logException;
 
 @MethodsNotNullByDefault
 @ParametersNotNullByDefault
@@ -79,7 +78,7 @@ class ReliabilityLayerImpl implements ReliabilityLayer, WriteHandler {
 				Thread.currentThread().interrupt();
 				running = false;
 			} catch (IOException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 				running = false;
 			}
 		});

bramble-core/src/main/java/org/briarproject/bramble/reporting/DevReporterImpl.java

@@ -32,7 +32,6 @@ import javax.inject.Inject;
 import javax.net.SocketFactory;
 
 import static java.util.logging.Level.WARNING;
-import static org.briarproject.bramble.util.LogUtils.logException;
 
 @Immutable
 @NotNullByDefault
@@ -133,7 +132,7 @@ class DevReporterImpl implements DevReporter, EventListener {
 		try {
 			if (c != null) c.close();
 		} catch (IOException e) {
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 		}
 	}
 
@@ -141,7 +140,7 @@ class DevReporterImpl implements DevReporter, EventListener {
 		try {
 			if (s != null) s.close();
 		} catch (IOException e) {
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 		}
 	}
 }

bramble-core/src/main/java/org/briarproject/bramble/sync/DuplexOutgoingSession.java

@@ -42,7 +42,6 @@ import static java.util.logging.Level.WARNING;
 import static org.briarproject.bramble.api.lifecycle.LifecycleManager.LifecycleState.STOPPING;
 import static org.briarproject.bramble.api.record.Record.MAX_RECORD_PAYLOAD_BYTES;
 import static org.briarproject.bramble.api.sync.SyncConstants.MAX_MESSAGE_IDS;
-import static org.briarproject.bramble.util.LogUtils.logException;
 
 /**
  * An outgoing {@link SyncSession} suitable for duplex transports. The session
@@ -241,7 +240,7 @@ class DuplexOutgoingSession implements SyncSession, EventListener {
 					LOG.info("Generated ack: " + (a != null));
 				if (a != null) writerTasks.add(new WriteAck(a));
 			} catch (DbException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 				interrupt();
 			}
 		}
@@ -288,7 +287,7 @@ class DuplexOutgoingSession implements SyncSession, EventListener {
 					LOG.info("Generated batch: " + (b != null));
 				if (b != null) writerTasks.add(new WriteBatch(b));
 			} catch (DbException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 				interrupt();
 			}
 		}
@@ -335,7 +334,7 @@ class DuplexOutgoingSession implements SyncSession, EventListener {
 					LOG.info("Generated offer: " + (o != null));
 				if (o != null) writerTasks.add(new WriteOffer(o));
 			} catch (DbException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 				interrupt();
 			}
 		}
@@ -380,7 +379,7 @@ class DuplexOutgoingSession implements SyncSession, EventListener {
 					LOG.info("Generated request: " + (r != null));
 				if (r != null) writerTasks.add(new WriteRequest(r));
 			} catch (DbException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 				interrupt();
 			}
 		}

bramble-core/src/main/java/org/briarproject/bramble/sync/IncomingSession.java

@@ -28,7 +28,6 @@ import javax.annotation.concurrent.ThreadSafe;
 
 import static java.util.logging.Level.WARNING;
 import static org.briarproject.bramble.api.lifecycle.LifecycleManager.LifecycleState.STOPPING;
-import static org.briarproject.bramble.util.LogUtils.logException;
 
 /**
  * An incoming {@link SyncSession}.
@@ -128,7 +127,7 @@ class IncomingSession implements SyncSession, EventListener {
 					db.endTransaction(txn);
 				}
 			} catch (DbException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 				interrupt();
 			}
 		}
@@ -154,7 +153,7 @@ class IncomingSession implements SyncSession, EventListener {
 					db.endTransaction(txn);
 				}
 			} catch (DbException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 				interrupt();
 			}
 		}
@@ -180,7 +179,7 @@ class IncomingSession implements SyncSession, EventListener {
 					db.endTransaction(txn);
 				}
 			} catch (DbException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 				interrupt();
 			}
 		}
@@ -206,7 +205,7 @@ class IncomingSession implements SyncSession, EventListener {
 					db.endTransaction(txn);
 				}
 			} catch (DbException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 				interrupt();
 			}
 		}

bramble-core/src/main/java/org/briarproject/bramble/sync/SimplexOutgoingSession.java

@@ -32,7 +32,6 @@ import static java.util.logging.Level.WARNING;
 import static org.briarproject.bramble.api.lifecycle.LifecycleManager.LifecycleState.STOPPING;
 import static org.briarproject.bramble.api.record.Record.MAX_RECORD_PAYLOAD_BYTES;
 import static org.briarproject.bramble.api.sync.SyncConstants.MAX_MESSAGE_IDS;
-import static org.briarproject.bramble.util.LogUtils.logException;
 
 /**
  * An outgoing {@link SyncSession} suitable for simplex transports. The session
@@ -140,7 +139,7 @@ class SimplexOutgoingSession implements SyncSession, EventListener {
 				if (a == null) decrementOutstandingQueries();
 				else writerTasks.add(new WriteAck(a));
 			} catch (DbException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 				interrupt();
 			}
 		}
@@ -185,7 +184,7 @@ class SimplexOutgoingSession implements SyncSession, EventListener {
 				if (b == null) decrementOutstandingQueries();
 				else writerTasks.add(new WriteBatch(b));
 			} catch (DbException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 				interrupt();
 			}
 		}

bramble-core/src/main/java/org/briarproject/bramble/sync/ValidationManagerImpl.java

@@ -40,7 +40,6 @@ import static java.util.logging.Level.WARNING;
 import static org.briarproject.bramble.api.sync.ValidationManager.State.DELIVERED;
 import static org.briarproject.bramble.api.sync.ValidationManager.State.INVALID;
 import static org.briarproject.bramble.api.sync.ValidationManager.State.PENDING;
-import static org.briarproject.bramble.util.LogUtils.logException;
 
 @ThreadSafe
 @NotNullByDefault
@@ -111,7 +110,7 @@ class ValidationManagerImpl implements ValidationManager, Service,
 			}
 			validateNextMessageAsync(unvalidated);
 		} catch (DbException e) {
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 		}
 	}
 
@@ -145,7 +144,7 @@ class ValidationManagerImpl implements ValidationManager, Service,
 			LOG.info("Group removed before validation");
 			validateNextMessageAsync(unvalidated);
 		} catch (DbException e) {
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 		}
 	}
 
@@ -166,7 +165,7 @@ class ValidationManagerImpl implements ValidationManager, Service,
 			}
 			deliverNextPendingMessageAsync(pending);
 		} catch (DbException e) {
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 		}
 	}
 
@@ -232,7 +231,7 @@ class ValidationManagerImpl implements ValidationManager, Service,
 			LOG.info("Group removed before delivery");
 			deliverNextPendingMessageAsync(pending);
 		} catch (DbException e) {
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 		}
 	}
 
@@ -253,7 +252,8 @@ class ValidationManagerImpl implements ValidationManager, Service,
 				storeMessageContextAsync(m, g.getClientId(),
 						g.getMajorVersion(), context);
 			} catch (InvalidMessageException e) {
-				logException(LOG, INFO, e);
+				if (LOG.isLoggable(INFO))
+					LOG.log(INFO, e.toString(), e);
 				Queue<MessageId> invalidate = new LinkedList<>();
 				invalidate.add(m.getId());
 				invalidateNextMessageAsync(invalidate);
@@ -326,7 +326,7 @@ class ValidationManagerImpl implements ValidationManager, Service,
 		} catch (NoSuchGroupException e) {
 			LOG.info("Group removed during validation");
 		} catch (DbException e) {
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 		}
 	}
 
@@ -377,7 +377,7 @@ class ValidationManagerImpl implements ValidationManager, Service,
 			}
 			shareNextMessageAsync(toShare);
 		} catch (DbException e) {
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 		}
 	}
 
@@ -412,7 +412,7 @@ class ValidationManagerImpl implements ValidationManager, Service,
 			LOG.info("Group removed before sharing");
 			shareNextMessageAsync(toShare);
 		} catch (DbException e) {
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 		}
 	}
 
@@ -440,7 +440,7 @@ class ValidationManagerImpl implements ValidationManager, Service,
 			LOG.info("Message removed before invalidation");
 			invalidateNextMessageAsync(invalidate);
 		} catch (DbException e) {
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 		}
 	}
 
@@ -492,7 +492,7 @@ class ValidationManagerImpl implements ValidationManager, Service,
 		} catch (NoSuchGroupException e) {
 			LOG.info("Group removed before validation");
 		} catch (DbException e) {
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 		}
 	}
 

bramble-core/src/main/java/org/briarproject/bramble/system/LinuxSecureRandomProvider.java

@@ -13,7 +13,6 @@ import java.util.logging.Logger;
 import javax.annotation.concurrent.Immutable;
 
 import static java.util.logging.Level.WARNING;
-import static org.briarproject.bramble.util.LogUtils.logException;
 
 @Immutable
 @NotNullByDefault
@@ -50,7 +49,7 @@ class LinuxSecureRandomProvider extends AbstractSecureRandomProvider {
 			out.close();
 		} catch (IOException e) {
 			// On some devices /dev/urandom isn't writable - this isn't fatal
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 		}
 	}
 

bramble-core/src/main/java/org/briarproject/bramble/system/LinuxSecureRandomSpi.java

@@ -10,7 +10,6 @@ import java.security.SecureRandomSpi;
 import java.util.logging.Logger;
 
 import static java.util.logging.Level.WARNING;
-import static org.briarproject.bramble.util.LogUtils.logException;
 
 public class LinuxSecureRandomSpi extends SecureRandomSpi {
 
@@ -40,7 +39,7 @@ public class LinuxSecureRandomSpi extends SecureRandomSpi {
 			out.close();
 		} catch (IOException e) {
 			// On some devices /dev/urandom isn't writable - this isn't fatal
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 		}
 	}
 

bramble-core/src/main/java/org/briarproject/bramble/transport/TransportKeyManagerImpl.java

@@ -36,7 +36,6 @@ import static org.briarproject.bramble.api.transport.TransportConstants.MAX_CLOC
 import static org.briarproject.bramble.api.transport.TransportConstants.PROTOCOL_VERSION;
 import static org.briarproject.bramble.api.transport.TransportConstants.TAG_LENGTH;
 import static org.briarproject.bramble.util.ByteUtils.MAX_32_BIT_UNSIGNED;
-import static org.briarproject.bramble.util.LogUtils.logException;
 
 @ThreadSafe
 @NotNullByDefault
@@ -170,7 +169,7 @@ class TransportKeyManagerImpl implements TransportKeyManager {
 					db.endTransaction(txn);
 				}
 			} catch (DbException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 			}
 		});
 	}

bramble-j2se/src/main/java/org/briarproject/bramble/lifecycle/WindowsShutdownManagerImpl.java

@@ -28,7 +28,6 @@ import javax.annotation.concurrent.ThreadSafe;
 import static com.sun.jna.Library.OPTION_FUNCTION_MAPPER;
 import static com.sun.jna.Library.OPTION_TYPE_MAPPER;
 import static java.util.logging.Level.WARNING;
-import static org.briarproject.bramble.util.LogUtils.logException;
 
 @ThreadSafe
 @NotNullByDefault
@@ -142,7 +141,7 @@ class WindowsShutdownManagerImpl extends ShutdownManagerImpl {
 					user32.DispatchMessage(msg);
 				}
 			} catch (UnsatisfiedLinkError e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 			}
 		}
 	}

bramble-j2se/src/main/java/org/briarproject/bramble/plugin/bluetooth/JavaBluetoothPlugin.java

@@ -19,7 +19,6 @@ import javax.microedition.io.StreamConnection;
 import javax.microedition.io.StreamConnectionNotifier;
 
 import static java.util.logging.Level.WARNING;
-import static org.briarproject.bramble.util.LogUtils.logException;
 import static org.briarproject.bramble.util.StringUtils.isValidMac;
 
 @MethodsNotNullByDefault
@@ -86,7 +85,7 @@ class JavaBluetoothPlugin extends BluetoothPlugin<StreamConnectionNotifier> {
 		try {
 			if (ss != null) ss.close();
 		} catch (IOException e) {
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 		}
 	}
 

bramble-j2se/src/main/java/org/briarproject/bramble/plugin/modem/ModemImpl.java

@@ -27,7 +27,6 @@ import static java.util.logging.Level.INFO;
 import static java.util.logging.Level.WARNING;
 import static jssc.SerialPort.PURGE_RXCLEAR;
 import static jssc.SerialPort.PURGE_TXCLEAR;
-import static org.briarproject.bramble.util.LogUtils.logException;
 
 @MethodsNotNullByDefault
 @ParametersNotNullByDefault
@@ -137,7 +136,7 @@ class ModemImpl implements Modem, WriteHandler, SerialPortEventListener {
 		try {
 			if (port != null) port.closePort();
 		} catch (IOException e) {
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 		}
 	}
 
@@ -328,7 +327,7 @@ class ModemImpl implements Modem, WriteHandler, SerialPortEventListener {
 				}
 			}
 		} catch (IOException e) {
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 		}
 	}
 
@@ -395,7 +394,8 @@ class ModemImpl implements Modem, WriteHandler, SerialPortEventListener {
 						try {
 							answer();
 						} catch (IOException e) {
-							logException(LOG, WARNING, e);
+							if (LOG.isLoggable(WARNING))
+								LOG.log(WARNING, e.toString(), e);
 						}
 					});
 				}

bramble-j2se/src/main/java/org/briarproject/bramble/plugin/modem/ModemPlugin.java

@@ -23,7 +23,6 @@ import java.util.logging.Logger;
 
 import static java.util.logging.Level.INFO;
 import static java.util.logging.Level.WARNING;
-import static org.briarproject.bramble.util.LogUtils.logException;
 
 @MethodsNotNullByDefault
 @ParametersNotNullByDefault
@@ -82,7 +81,7 @@ class ModemPlugin implements DuplexPlugin, Modem.Callback {
 				running = true;
 				return;
 			} catch (IOException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 			}
 		}
 		throw new PluginException();
@@ -95,7 +94,7 @@ class ModemPlugin implements DuplexPlugin, Modem.Callback {
 			try {
 				modem.stop();
 			} catch (IOException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 			}
 		}
 	}
@@ -132,7 +131,7 @@ class ModemPlugin implements DuplexPlugin, Modem.Callback {
 					LOG.info("Initialised modem on " + portName);
 				return true;
 			} catch (IOException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 			}
 		}
 		running = false;
@@ -158,7 +157,7 @@ class ModemPlugin implements DuplexPlugin, Modem.Callback {
 		try {
 			if (!modem.dial(number)) return null;
 		} catch (IOException e) {
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 			resetModem();
 			return null;
 		}
@@ -210,7 +209,7 @@ class ModemPlugin implements DuplexPlugin, Modem.Callback {
 			try {
 				modem.hangUp();
 			} catch (IOException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 				exception = true;
 			}
 			if (exception) resetModem();

briar-android/.gitignore

@@ -4,4 +4,3 @@ build
 local.properties
 .settings
 src/main/assets/*.zip
-src/main/res/values-iw

briar-android/artwork/logo_horizontal_white.svg

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briar-android/artwork/navigation_drawer_header.svg

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-     id="path35" /></svg>

briar-android/artwork/notification_ongoing.svg

@@ -1,58 +0,0 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<!-- Generator: Adobe Illustrator 19.0.0, SVG Export Plug-In . SVG Version: 6.00 Build 0)  -->
-
-<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"
-   version="1.1"
-   id="Ebene_1"
-   x="0px"
-   y="0px"
-   viewBox="0 0 24 24"
-   xml:space="preserve"
-   inkscape:version="0.92.3 (2405546, 2018-03-11)"
-   sodipodi:docname="notification_ongoing.svg"
-   width="24"
-   height="24"><metadata
-     id="metadata61"><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 /></cc:Work></rdf:RDF></metadata><defs
-     id="defs59" /><sodipodi:namedview
-     pagecolor="#000000"
-     bordercolor="#666666"
-     borderopacity="1"
-     objecttolerance="10"
-     gridtolerance="10"
-     guidetolerance="10"
-     inkscape:pageopacity="0"
-     inkscape:pageshadow="2"
-     inkscape:window-width="1920"
-     inkscape:window-height="1020"
-     id="namedview57"
-     showgrid="false"
-     inkscape:zoom="11.466748"
-     inkscape:cx="-4.790356"
-     inkscape:cy="17.536496"
-     inkscape:window-x="1442"
-     inkscape:window-y="24"
-     inkscape:window-maximized="0"
-     inkscape:current-layer="Ebene_1"
-     units="px" /><style
-     type="text/css"
-     id="style3">
-	.st0{fill:#FFFFFF;}
-	.st1{display:none;fill:#87C214;}
-	.st2{fill:#87C214;}
-	.st3{display:none;fill:#FFFFFF;}
-	.st4{fill:#95D220;}
-	.st5{display:none;fill:#95D220;}
-</style><path
-     style="fill:#ffffff;stroke-width:0.07272727"
-     d="M 12,0 A 12,12 0 0 0 0,12 12,12 0 0 0 12,24 12,12 0 0 0 24,12 12,12 0 0 0 12,0 Z M 8.1454545,3.4764204 h 0.6036931 c 0.7054546,0 1.2872164,0.5817614 1.2872164,1.287216 V 6.4 H 6.8582386 V 4.7636364 c 0,-0.7054546 0.5817614,-1.287216 1.2872159,-1.287216 z m 7.0545455,0 h 0.603693 c 0.712727,0 1.287216,0.5817614 1.287216,1.287216 V 13.454545 H 13.912784 V 4.7636364 c 0,-0.7054546 0.581761,-1.287216 1.287216,-1.287216 z M 4.7127841,6.9090909 H 13.403693 V 10.087216 H 4.7127841 c -0.7127273,0 -1.287358,-0.5817618 -1.287358,-1.2872156 V 8.1963069 c 0,-0.7127273 0.5819034,-1.287216 1.287358,-1.287216 z m 12.8872159,0 h 1.636364 c 0.705454,0 1.279943,0.5817615 1.287216,1.287216 v 0.6036935 c 0,0.7127269 -0.581762,1.2872156 -1.287216,1.2872156 H 17.6 Z M 6.8582386,10.596307 h 3.1781254 v 8.690909 c 0,0.705454 -0.5817618,1.287358 -1.2872164,1.287358 H 8.1454545 c -0.7127272,0 -1.2872159,-0.581904 -1.2872159,-1.287358 z m -2.1454545,3.367329 h 1.6363636 v 3.178125 H 4.7127841 c -0.7127273,0 -1.287358,-0.581761 -1.287358,-1.287216 v -0.603693 c 0,-0.712727 0.5819034,-1.287216 1.287358,-1.287216 z m 5.8326709,0 h 8.690909 c 0.705454,0 1.279943,0.581761 1.287216,1.287216 v 0.603693 c 0,0.705455 -0.581762,1.287216 -1.287216,1.287216 h -8.690909 z m 3.367329,3.687216 h 3.178125 v 1.636364 c 0,0.705454 -0.581761,1.287358 -1.287216,1.287358 H 15.2 c -0.705455,0 -1.287216,-0.581904 -1.287216,-1.287358 z"
-     id="circle7"
-     inkscape:connector-curvature="0" /></svg>

briar-android/build.gradle

@@ -22,7 +22,7 @@ dependencies {
 	implementation "com.android.support:support-annotations:$supportVersion"
 	implementation 'com.android.support.constraint:constraint-layout:1.1.0'
 
-	implementation('ch.acra:acra:4.9.1') {
+	implementation('ch.acra:acra:4.8.5') {
 		exclude module: 'support-v4'
 		exclude module: 'support-annotations'
 	}
@@ -61,7 +61,7 @@ dependencyVerification {
 			'android.arch.lifecycle:viewmodel:1.1.0:viewmodel-1.1.0.aar:6407c93a5ea9850661dca42a0068d6f3deccefd7228ee69bae1c35d70cbc2557',
 			'backport-util-concurrent:backport-util-concurrent:3.1:backport-util-concurrent-3.1.jar:f5759b7fcdfc83a525a036deedcbd32e5b536b625ebc282426f16ca137eb5902',
 			'cglib:cglib:3.2.0:cglib-3.2.0.jar:adb13bab79712ad6bdf1bd59f2a3918018a8016e722e8a357065afb9e6690861',
-			'ch.acra:acra:4.9.1:acra-4.9.1.aar:d2762968c448757a7d6acc9f141881d9632f664988e9723ece33b5f7c79f3bc9',
+			'ch.acra:acra:4.8.5:acra-4.8.5.aar:afd5b28934d5166b55f261c85685ad59e8a4ebe9ca1960906afaa8c76d8dc9eb',
 			'classworlds:classworlds:1.1-alpha-2:classworlds-1.1-alpha-2.jar:2bf4e59f3acd106fea6145a9a88fe8956509f8b9c0fdd11eb96fee757269e3f3',
 			'com.almworks.sqlite4java:sqlite4java:0.282:sqlite4java-0.282.jar:9e1d8dd83ca6003f841e3af878ce2dc7c22497493a7bb6d1b62ec1b0d0a83c05',
 			'com.android.support.constraint:constraint-layout-solver:1.1.0:constraint-layout-solver-1.1.0.jar:fcb4c7d705754ca3d69b1b2c3caf445a425599fda8caabbcf855d98ea0663e4e',
@@ -82,32 +82,32 @@ dependencyVerification {
 			'com.android.support:support-v4:27.1.1:support-v4-27.1.1.aar:4f41dfc3e89f2738e45c86264a85c0934d055ee8ebe2020e23c97f303b80a48b',
 			'com.android.support:support-vector-drawable:27.1.1:support-vector-drawable-27.1.1.aar:1c0f421114cf4627cf208776d6eb4f76340c78b7e96fe6e12b3e6eb950caf1b9',
 			'com.android.support:transition:27.1.1:transition-27.1.1.aar:c0765b2f3c78696567ec5b3f519d22da1e3df11ac994625adf4bb4dc571caacc',
-			'com.android.tools.analytics-library:protos:26.1.3:protos-26.1.3.jar:818c9f256f141d9dafec03a1aa2b94d240b2c140acfd7ee31a8b3e6c2b9479e3',
-			'com.android.tools.analytics-library:shared:26.1.3:shared-26.1.3.jar:7110706c7ada96c8b6f5ca80c478291bc7899d46277de2c48527e045442401a3',
-			'com.android.tools.analytics-library:tracker:26.1.3:tracker-26.1.3.jar:4155424bf2ce4872da83332579a1707252bc66cbd77c5144fdc4483d0f2e1418',
-			'com.android.tools.build:apksig:3.1.3:apksig-3.1.3.jar:7e1f8e675a6e768e5b56405e41d6c3cc05befe62e601b04177de1029902c9c89',
-			'com.android.tools.build:builder-model:3.1.3:builder-model-3.1.3.jar:06ad1c422d679fc698451479cb40ba863849d67bfd1de23f6d2c16d78b024b0b',
-			'com.android.tools.build:builder-test-api:3.1.3:builder-test-api-3.1.3.jar:4d989f780436794f0f8b2f50e9e079b786571eac90f26c208ab2ae6d4012f389',
-			'com.android.tools.build:builder:3.1.3:builder-3.1.3.jar:8a1092012c89d0ec1ee2eff09c5708c71ef4482a6862df8d3a44a67fccace01c',
-			'com.android.tools.build:gradle-api:3.1.3:gradle-api-3.1.3.jar:01e4df521456aef66514336f1d492346730dd1fb8f6433a89f62da834941ed72',
-			'com.android.tools.build:manifest-merger:26.1.3:manifest-merger-26.1.3.jar:1e4fc7e932adb4607082409800e5e6fccb42e6c5360ae5990094bf522f3ada55',
-			'com.android.tools.ddms:ddmlib:26.1.3:ddmlib-26.1.3.jar:c54931cd68df5d1ea2923b3b320eae47cd2307a5a916bb8674c0acf93cd1d3cd',
-			'com.android.tools.external.com-intellij:intellij-core:26.1.3:intellij-core-26.1.3.jar:af67f5535fef2e1a28b1007a4acb8c5deb6a1e33b8afe7b11d012c9e778ebcec',
-			'com.android.tools.external.com-intellij:kotlin-compiler:26.1.3:kotlin-compiler-26.1.3.jar:c746d2859dc11cc05c84b692b3498d3a621e0929511f8440ee009c6557838fd4',
-			'com.android.tools.external.org-jetbrains:uast:26.1.3:uast-26.1.3.jar:3f3f6651d0c7685a77ecb22e9c82d6b49fdf24322c17360768dc530678f43265',
-			'com.android.tools.layoutlib:layoutlib-api:26.1.3:layoutlib-api-26.1.3.jar:10bc73ce706c45629872d6a999dbe12116df64e24f47ff93b7b13121ff57b4b0',
-			'com.android.tools.lint:lint-api:26.1.3:lint-api-26.1.3.jar:6f97323f9af8deda86278717885b5c927f3766757db89709f52d11d42b6fb751',
-			'com.android.tools.lint:lint-checks:26.1.3:lint-checks-26.1.3.jar:73c3d53784c9ce3e6d5968506581918e0179645d20809927ca4a001dd766b001',
-			'com.android.tools.lint:lint-gradle-api:26.1.3:lint-gradle-api-26.1.3.jar:7ca3c4866ec21dc21d53a9d86f752b77ace6f6c610a0c9dc877313856c733d9d',
-			'com.android.tools.lint:lint-gradle:26.1.3:lint-gradle-26.1.3.jar:db0c354b8f4b6f6637e31f91c564785a59ff896325331fcbc3de7458e0b6c067',
-			'com.android.tools.lint:lint-kotlin:26.1.3:lint-kotlin-26.1.3.jar:94e2b0f4565a241561cfb8fc1222bb3f132a3b98d2a90421dbb72ee8358e7d68',
-			'com.android.tools.lint:lint:26.1.3:lint-26.1.3.jar:8d5f32c989c6d191d712e90ad3ca2d1c409313599551d04d834caa44d26c78df',
-			'com.android.tools:annotations:26.1.3:annotations-26.1.3.jar:c950430b24ac5d58fc97e7283b8f0115f99587e76e08b4e1e2aaa780f2d77323',
-			'com.android.tools:common:26.1.3:common-26.1.3.jar:7c31a90581a148ab219f615a59667f0dded7fa39b248529784474da3c2274ef2',
-			'com.android.tools:dvlib:26.1.3:dvlib-26.1.3.jar:0cae87906f53d3f1088366a916ed180a7312b6d9919b90797f238875c8492855',
-			'com.android.tools:repository:26.1.3:repository-26.1.3.jar:52d4539cc68db91b261e2a33b2c8206b26e05539078758dc28cfb3854adb4f59',
-			'com.android.tools:sdk-common:26.1.3:sdk-common-26.1.3.jar:1948603ca9ff22c7ebb3178000bffa3a9dd2ca1cc5cb0c793cae08468b8fcfc1',
-			'com.android.tools:sdklib:26.1.3:sdklib-26.1.3.jar:4adcfaad9514607098d2c51503c39811112d3050f4d1e744c01c7f08f591032b',
+			'com.android.tools.analytics-library:protos:26.1.2:protos-26.1.2.jar:52672a0b42b572a06aecc3535d5068eb46c0e15d129b9f1085d3c16a1da5cdbb',
+			'com.android.tools.analytics-library:shared:26.1.2:shared-26.1.2.jar:5c7e0eda18c6f87feeb83628c707e8aaa3298b41fb72e38efe31ad1675f9e8e9',
+			'com.android.tools.analytics-library:tracker:26.1.2:tracker-26.1.2.jar:06f97aa0adf44ffb06f8681c6a79d9be153a08f61d21eddc42b8d3db96df4282',
+			'com.android.tools.build:apksig:3.1.2:apksig-3.1.2.jar:40696a4559124d1d57873d208857eee059d48859239d569c7d18374ac644a8be',
+			'com.android.tools.build:builder-model:3.1.2:builder-model-3.1.2.jar:d49bfa2a135c9562b6ca7aa4342036cfa1582c7074c2d1d93d1dae8b3a134e17',
+			'com.android.tools.build:builder-test-api:3.1.2:builder-test-api-3.1.2.jar:dfe2a50b740d41b11189101062434d4283d18647e89a492ad51710c719363e9f',
+			'com.android.tools.build:builder:3.1.2:builder-3.1.2.jar:b60f825a42e2efe8433619fbc759f3d9effecab718279048d36881188ceb1d14',
+			'com.android.tools.build:gradle-api:3.1.2:gradle-api-3.1.2.jar:e58bcc5b893e4583ab0f5c8ef89c4dbcce202b405a9d7fcc116d21e5357d4893',
+			'com.android.tools.build:manifest-merger:26.1.2:manifest-merger-26.1.2.jar:9c61c27ea5266573107b954acf1216d398f4d7e7ae6fad6409d6b2b767eb091c',
+			'com.android.tools.ddms:ddmlib:26.1.2:ddmlib-26.1.2.jar:18a2a5fbef36882f07d03c2b9e59eba05cf8248177bf5cbff736e4b582804c44',
+			'com.android.tools.external.com-intellij:intellij-core:26.1.2:intellij-core-26.1.2.jar:37c5acf279f1ae3e85b1a5be3c9f15f43bde7b08f978eefefffb9c4035760c52',
+			'com.android.tools.external.com-intellij:kotlin-compiler:26.1.2:kotlin-compiler-26.1.2.jar:152df0bee7580326c77316b669a9d96e3b09efb1d45f545dce4147271b0b8944',
+			'com.android.tools.external.org-jetbrains:uast:26.1.2:uast-26.1.2.jar:02d39582206d3f5fc0a6cb18bfd9e8b9f9c1acb805ec6dac08b4e3a56849d279',
+			'com.android.tools.layoutlib:layoutlib-api:26.1.2:layoutlib-api-26.1.2.jar:20220039fcc7d799f928153beff862e704457c0f55ab44258f3745ebeb662b4f',
+			'com.android.tools.lint:lint-api:26.1.2:lint-api-26.1.2.jar:e1d5b62b870a7c566e9877a6b96b27784a4d713f8caa07fdcb4705d47a40a1d9',
+			'com.android.tools.lint:lint-checks:26.1.2:lint-checks-26.1.2.jar:211e2afd58504372385d71b1e5be982c2b5121ab6fee1c04ddabeb75a8729e07',
+			'com.android.tools.lint:lint-gradle-api:26.1.2:lint-gradle-api-26.1.2.jar:71284f2a8b03c3e55c94511c9eb36f8184fbb85324325fc6b78abf5183f03d90',
+			'com.android.tools.lint:lint-gradle:26.1.2:lint-gradle-26.1.2.jar:855f0c82b7fc690df1b7319c0774f7517f7f8f5dd4eee1f6077dcf50e07c6240',
+			'com.android.tools.lint:lint-kotlin:26.1.2:lint-kotlin-26.1.2.jar:1e591f70bcbbc11569720a9bbcca2bc1f3d4f789f01f40f642848d920643d484',
+			'com.android.tools.lint:lint:26.1.2:lint-26.1.2.jar:93736c62e9f1976998c2b4aa716aea0734cdb162d05502f4af7292654aedb182',
+			'com.android.tools:annotations:26.1.2:annotations-26.1.2.jar:72773dcaf5c4ccca828e3c8467f1b78a8a00b3cc5f8ad1aab88fcf9379928018',
+			'com.android.tools:common:26.1.2:common-26.1.2.jar:ea4320f0c17dcbc4491896bb705c4d25ec08bd62ef02ab0579fe154e75e788e6',
+			'com.android.tools:dvlib:26.1.2:dvlib-26.1.2.jar:1187aa4fb666595c96c4deb6bc0e0f4b7e396bde9f6243330b49a232946130ea',
+			'com.android.tools:repository:26.1.2:repository-26.1.2.jar:8b86e512ad6d32bd76989451eefe2b271f5efce6d4d65ecb173afaf14606e01a',
+			'com.android.tools:sdk-common:26.1.2:sdk-common-26.1.2.jar:23584720a60a21cdcb5b1ec10269e3013789d6805d153cc696c39ec7ce251896',
+			'com.android.tools:sdklib:26.1.2:sdklib-26.1.2.jar:d3870fafc59ab8efa70d3f9649f40ee299c8ec5b58377b06e8853d7272a5bf4e',
 			'com.github.bumptech.glide:glide:3.8.0:glide-3.8.0.jar:750d9e7b940dc0ee48f8680623b55d46e14e8727acc922d7b156e57e7c549655',
 			'com.google.android.apps.common.testing.accessibility.framework:accessibility-test-framework:2.1:accessibility-test-framework-2.1.jar:7b0aa6ed7553597ce0610684a9f7eca8021eee218f2e2f427c04a7fbf5f920bd',
 			'com.google.code.findbugs:jsr305:1.3.9:jsr305-1.3.9.jar:905721a0eea90a81534abb7ee6ef4ea2e5e645fa1def0a5cd88402df1b46c9ed',
@@ -238,16 +238,15 @@ android {
 	defaultConfig {
 		minSdkVersion 14
 		targetSdkVersion 26
-		versionCode 10013
-		versionName "1.0.13"
+		versionCode 10005
+		versionName "1.0.5"
 		applicationId "org.briarproject.briar.android"
 		resValue "string", "app_package", "org.briarproject.briar.android"
 		resValue "string", "app_name", "Briar"
 		buildConfigField "String", "GitHash",
 				"\"${getStdout(['git', 'rev-parse', '--short=7', 'HEAD'], 'No commit hash')}\""
-		def now = (long) (System.currentTimeMillis() / 1000)
 		buildConfigField "Long", "BuildTimestamp",
-				"${getStdout(['git', 'log', '-n', '1', '--format=%ct'], now)}000L"
+				"${getStdout(['git', 'log', '-n', '1', '--format=%ct'], 0)}000L"
 	}
 
 	buildTypes {
@@ -261,7 +260,7 @@ android {
 			proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'
 		}
 		release {
-			shrinkResources false
+			shrinkResources true
 			minifyEnabled true
 			crunchPngs false
 			proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'
@@ -285,46 +284,3 @@ android {
 		warning 'ExtraTranslation'
 	}
 }
-
-task verifyTranslations {
-	doLast {
-		def file = project.file("src/main/res/values/arrays.xml")
-		def arrays = new XmlParser().parse(file)
-		def lc = arrays.children().find { it.@name == "pref_language_values" }
-		def translations = []
-		lc.children().each { value -> translations.add(value.text()) }
-
-		def folders = ["default", "en-US"]
-		project.file("src/main/res").eachDir { dir ->
-			if (dir.name.startsWith("values-") && !dir.name.endsWith("night")) {
-				folders.add(dir.name.substring(7).replace("-r", "-"))
-			}
-		}
-		folders.each { n ->
-			if (!translations.remove(n) && n != 'iw') {
-				throw new GradleException("Translation " + n + " is missing in $file")
-			}
-		}
-		if (translations.size() != 0)
-			throw new GradleException("Translations\n" + translations.join("\n")
-					+ "\nhave no matching value folder")
-
-		// Some devices use iw instead of he for hebrew
-		def hebrew_legacy = project.file("src/main/res/values-iw")
-		def hebrew = project.file("src/main/res/values-he")
-		// Copy values-he to values-iw
-		if (hebrew.exists()) {
-			hebrew_legacy.mkdir()
-			copy {
-				from hebrew.getAbsolutePath()
-				into hebrew_legacy.getAbsolutePath()
-			}
-		}
-	}
-}
-
-project.afterEvaluate {
-	preBuild.dependsOn.add(verifyTranslations)
-}
-
-

briar-android/src/main/AndroidManifest.xml

@@ -3,9 +3,8 @@
 	package="org.briarproject.briar"
 	xmlns:android="http://schemas.android.com/apk/res/android">
 
-	<uses-feature android:name="android.hardware.bluetooth" android:required="false"/>
+	<uses-feature android:name="android.hardware.bluetooth"/>
 	<uses-feature android:name="android.hardware.camera" />
-	<uses-feature android:name="android.hardware.touchscreen" android:required="false" />
 
 	<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
 	<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
@@ -15,7 +14,6 @@
 	<uses-permission android:name="android.permission.INTERNET" />
 	<uses-permission android:name="android.permission.VIBRATE" />
 	<uses-permission android:name="android.permission.WAKE_LOCK" />
-	<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>
 	<uses-permission-sdk-23 android:name="android.permission.REQUEST_IGNORE_BATTERY_OPTIMIZATIONS"/>
 
 	<application
@@ -26,15 +24,6 @@
 		android:logo="@mipmap/ic_launcher_round"
 		android:theme="@style/BriarTheme">
 
-		<receiver
-			android:name="org.briarproject.briar.android.login.SignInReminderReceiver"
-			android:exported="false">
-			<intent-filter>
-				<action android:name="android.intent.action.BOOT_COMPLETED"/>
-				<action android:name="android.intent.action.MY_PACKAGE_REPLACED"/>
-			</intent-filter>
-		</receiver>
-
 		<service
 			android:name="org.briarproject.briar.android.BriarService"
 			android:exported="false">
@@ -55,6 +44,7 @@
 			android:finishOnTaskLaunch="true"
 			android:label="@string/crash_report_title"
 			android:launchMode="singleInstance"
+			android:process=":briar_error_handler"
 			android:theme="@style/BriarTheme.NoActionBar"
 			android:windowSoftInputMode="stateHidden">
 		</activity>
@@ -311,7 +301,7 @@
 		</activity>
 
 		<activity
-			android:name="org.briarproject.briar.android.keyagreement.ContactExchangeActivity"
+			android:name="org.briarproject.briar.android.keyagreement.KeyAgreementActivity"
 			android:label="@string/add_contact_title"
 			android:theme="@style/BriarTheme.NoActionBar"
 			android:parentActivityName="org.briarproject.briar.android.navdrawer.NavDrawerActivity">

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

@@ -26,7 +26,6 @@ import org.briarproject.bramble.api.system.AndroidExecutor;
 import org.briarproject.bramble.api.system.Clock;
 import org.briarproject.briar.BriarCoreEagerSingletons;
 import org.briarproject.briar.BriarCoreModule;
-import org.briarproject.briar.android.login.SignInReminderReceiver;
 import org.briarproject.briar.android.reporting.BriarReportSender;
 import org.briarproject.briar.api.android.AndroidNotificationManager;
 import org.briarproject.briar.api.android.DozeWatchdog;
@@ -151,8 +150,6 @@ public interface AndroidComponent
 	@IoExecutor
 	Executor ioExecutor();
 
-	void inject(SignInReminderReceiver briarService);
-
 	void inject(BriarService briarService);
 
 	void inject(BriarReportSender briarReportSender);

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

@@ -70,7 +70,6 @@ import static android.os.Build.VERSION.SDK_INT;
 import static android.support.v4.app.NotificationCompat.CATEGORY_MESSAGE;
 import static android.support.v4.app.NotificationCompat.CATEGORY_SOCIAL;
 import static java.util.logging.Level.WARNING;
-import static org.briarproject.bramble.util.LogUtils.logException;
 import static org.briarproject.briar.android.activity.BriarActivity.GROUP_ID;
 import static org.briarproject.briar.android.contact.ConversationActivity.CONTACT_ID;
 import static org.briarproject.briar.android.navdrawer.NavDrawerActivity.INTENT_BLOGS;
@@ -85,6 +84,13 @@ import static org.briarproject.briar.android.settings.SettingsFragment.SETTINGS_
 class AndroidNotificationManagerImpl implements AndroidNotificationManager,
 		Service, EventListener {
 
+	// Notification IDs
+	private static final int PRIVATE_MESSAGE_NOTIFICATION_ID = 3;
+	private static final int GROUP_MESSAGE_NOTIFICATION_ID = 4;
+	private static final int FORUM_POST_NOTIFICATION_ID = 5;
+	private static final int BLOG_POST_NOTIFICATION_ID = 6;
+	private static final int INTRODUCTION_SUCCESS_NOTIFICATION_ID = 7;
+
 	private static final long SOUND_DELAY = TimeUnit.SECONDS.toMillis(2);
 
 	private static final Logger LOG =
@@ -259,7 +265,8 @@ class AndroidNotificationManagerImpl implements AndroidNotificationManager,
 			try {
 				settings = settingsManager.getSettings(SETTINGS_NAMESPACE);
 			} catch (DbException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING))
+					LOG.log(WARNING, e.toString(), e);
 			}
 		});
 	}

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

@@ -20,17 +20,16 @@ import org.briarproject.bramble.api.plugin.duplex.DuplexPluginFactory;
 import org.briarproject.bramble.api.plugin.simplex.SimplexPluginFactory;
 import org.briarproject.bramble.api.reporting.DevConfig;
 import org.briarproject.bramble.api.system.AndroidExecutor;
-import org.briarproject.bramble.api.system.Clock;
 import org.briarproject.bramble.api.system.LocationUtils;
 import org.briarproject.bramble.api.system.Scheduler;
 import org.briarproject.bramble.plugin.bluetooth.AndroidBluetoothPluginFactory;
 import org.briarproject.bramble.plugin.tcp.AndroidLanTcpPluginFactory;
-import org.briarproject.bramble.plugin.tor.CircumventionProvider;
 import org.briarproject.bramble.plugin.tor.TorPluginFactory;
 import org.briarproject.bramble.util.AndroidUtils;
 import org.briarproject.bramble.util.StringUtils;
 import org.briarproject.briar.api.android.AndroidNotificationManager;
 import org.briarproject.briar.api.android.DozeWatchdog;
+import org.briarproject.briar.api.android.ReferenceManager;
 import org.briarproject.briar.api.android.ScreenFilterMonitor;
 
 import java.io.File;
@@ -98,15 +97,14 @@ public class AppModule {
 			@Scheduler ScheduledExecutorService scheduler,
 			AndroidExecutor androidExecutor, SecureRandom random,
 			SocketFactory torSocketFactory, BackoffFactory backoffFactory,
-			Application app, LocationUtils locationUtils, EventBus eventBus,
-			CircumventionProvider circumventionProvider, Clock clock) {
+			Application app, LocationUtils locationUtils, EventBus eventBus) {
 		Context appContext = app.getApplicationContext();
 		DuplexPluginFactory bluetooth =
 				new AndroidBluetoothPluginFactory(ioExecutor, androidExecutor,
 						appContext, random, eventBus, backoffFactory);
 		DuplexPluginFactory tor = new TorPluginFactory(ioExecutor, scheduler,
-				appContext, locationUtils, eventBus, torSocketFactory,
-				backoffFactory, circumventionProvider, clock);
+				appContext, locationUtils, eventBus,
+				torSocketFactory, backoffFactory);
 		DuplexPluginFactory lan = new AndroidLanTcpPluginFactory(ioExecutor,
 				scheduler, backoffFactory, appContext);
 		Collection<DuplexPluginFactory> duplex = asList(bluetooth, tor, lan);
@@ -162,10 +160,15 @@ public class AppModule {
 
 	@Provides
 	SharedPreferences provideSharedPreferences(Application app) {
-		// FIXME unify this with getDefaultSharedPreferences()
 		return app.getSharedPreferences("db", MODE_PRIVATE);
 	}
 
+	@Provides
+	@Singleton
+	ReferenceManager provideReferenceManager() {
+		return new ReferenceManagerImpl();
+	}
+
 	@Provides
 	@Singleton
 	AndroidNotificationManager provideAndroidNotificationManager(

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

@@ -1,7 +1,5 @@
 package org.briarproject.briar.android;
 
-import android.content.SharedPreferences;
-
 import java.util.Collection;
 import java.util.logging.LogRecord;
 
@@ -14,6 +12,4 @@ public interface BriarApplication {
 	Collection<LogRecord> getRecentLogRecords();
 
 	AndroidComponent getApplicationComponent();
-
-	SharedPreferences getDefaultSharedPreferences();
 }

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

@@ -2,12 +2,9 @@ package org.briarproject.briar.android;
 
 import android.app.Application;
 import android.content.Context;
-import android.content.SharedPreferences;
-import android.content.res.Configuration;
 import android.os.StrictMode;
 import android.os.StrictMode.ThreadPolicy;
 import android.os.StrictMode.VmPolicy;
-import android.preference.PreferenceManager;
 
 import org.acra.ACRA;
 import org.acra.ReportingInteractionMode;
@@ -19,14 +16,12 @@ import org.briarproject.briar.android.logging.CachingLogHandler;
 import org.briarproject.briar.android.reporting.BriarReportPrimer;
 import org.briarproject.briar.android.reporting.BriarReportSenderFactory;
 import org.briarproject.briar.android.reporting.DevReportActivity;
-import org.briarproject.briar.android.util.UiUtils;
 
 import java.util.Collection;
 import java.util.logging.Handler;
 import java.util.logging.LogRecord;
 import java.util.logging.Logger;
 
-import static java.util.logging.Level.FINE;
 import static java.util.logging.Level.INFO;
 import static org.acra.ReportField.ANDROID_VERSION;
 import static org.acra.ReportField.APP_VERSION_CODE;
@@ -77,17 +72,10 @@ public class BriarApplicationImpl extends Application
 	private final CachingLogHandler logHandler = new CachingLogHandler();
 
 	private AndroidComponent applicationComponent;
-	private volatile SharedPreferences prefs;
 
 	@Override
 	protected void attachBaseContext(Context base) {
-		if (prefs == null)
-			prefs = PreferenceManager.getDefaultSharedPreferences(base);
-		// Loading the language needs to be done here.
-		Localizer.initialize(prefs);
-		super.attachBaseContext(
-				Localizer.getInstance().setLocale(base));
-		setTheme(base, prefs);
+		super.attachBaseContext(base);
 		ACRA.init(this);
 	}
 
@@ -105,7 +93,7 @@ public class BriarApplicationImpl extends Application
 			}
 		}
 		rootLogger.addHandler(logHandler);
-		rootLogger.setLevel(IS_DEBUG_BUILD || IS_BETA_BUILD ? FINE : INFO);
+		rootLogger.setLevel(INFO);
 
 		LOG.info("Created");
 
@@ -120,23 +108,6 @@ public class BriarApplicationImpl extends Application
 		AndroidEagerSingletons.initEagerSingletons(applicationComponent);
 	}
 
-	@Override
-	public void onConfigurationChanged(Configuration newConfig) {
-		super.onConfigurationChanged(newConfig);
-		Localizer.getInstance().setLocale(this);
-	}
-
-	private void setTheme(Context ctx, SharedPreferences prefs) {
-		String theme = prefs.getString("pref_key_theme", null);
-		if (theme == null) {
-			// set default value
-			theme = getString(R.string.pref_theme_light_value);
-			prefs.edit().putString("pref_key_theme", theme).apply();
-		}
-		// set theme
-		UiUtils.setTheme(ctx, theme);
-	}
-
 	private void enableStrictMode() {
 		ThreadPolicy.Builder threadPolicy = new ThreadPolicy.Builder();
 		threadPolicy.detectAll();
@@ -157,9 +128,4 @@ public class BriarApplicationImpl extends Application
 	public AndroidComponent getApplicationComponent() {
 		return applicationComponent;
 	}
-
-	@Override
-	public SharedPreferences getDefaultSharedPreferences() {
-		return prefs;
-	}
 }

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

@@ -1,7 +1,5 @@
 package org.briarproject.briar.android;
 
-import android.app.ActivityManager;
-import android.app.ActivityManager.RunningAppProcessInfo;
 import android.app.NotificationChannel;
 import android.app.NotificationManager;
 import android.app.PendingIntent;
@@ -32,7 +30,6 @@ import java.util.logging.Logger;
 import javax.annotation.Nullable;
 import javax.inject.Inject;
 
-import static android.app.ActivityManager.RunningAppProcessInfo.IMPORTANCE_FOREGROUND;
 import static android.app.NotificationManager.IMPORTANCE_DEFAULT;
 import static android.app.NotificationManager.IMPORTANCE_NONE;
 import static android.app.PendingIntent.FLAG_UPDATE_CURRENT;
@@ -50,10 +47,6 @@ import static java.util.logging.Level.INFO;
 import static java.util.logging.Level.WARNING;
 import static org.briarproject.bramble.api.lifecycle.LifecycleManager.StartResult.ALREADY_RUNNING;
 import static org.briarproject.bramble.api.lifecycle.LifecycleManager.StartResult.SUCCESS;
-import static org.briarproject.briar.api.android.AndroidNotificationManager.FAILURE_CHANNEL_ID;
-import static org.briarproject.briar.api.android.AndroidNotificationManager.FAILURE_NOTIFICATION_ID;
-import static org.briarproject.briar.api.android.AndroidNotificationManager.ONGOING_CHANNEL_ID;
-import static org.briarproject.briar.api.android.AndroidNotificationManager.ONGOING_NOTIFICATION_ID;
 
 public class BriarService extends Service {
 
@@ -64,6 +57,14 @@ public class BriarService extends Service {
 	public static String EXTRA_STARTUP_FAILED =
 			"org.briarproject.briar.STARTUP_FAILED";
 
+	private static final int ONGOING_NOTIFICATION_ID = 1;
+	private static final int FAILURE_NOTIFICATION_ID = 2;
+
+	// Channels are sorted by channel ID in the Settings app, so use IDs
+	// that will sort below the main channels such as contacts
+	private static final String ONGOING_CHANNEL_ID = "zForegroundService";
+	private static final String FAILURE_CHANNEL_ID = "zStartupFailure";
+
 	private static final Logger LOG =
 			Logger.getLogger(BriarService.class.getName());
 
@@ -167,11 +168,6 @@ public class BriarService extends Service {
 		registerReceiver(receiver, filter);
 	}
 
-	@Override
-	protected void attachBaseContext(Context base) {
-		super.attachBaseContext(Localizer.getInstance().setLocale(base));
-	}
-
 	private void showStartupFailureNotification(StartResult result) {
 		androidExecutor.runOnUiThread(() -> {
 			NotificationCompat.Builder b = new NotificationCompat.Builder(
@@ -247,10 +243,8 @@ public class BriarService extends Service {
 				LOG.info("Trim memory: running low");
 			} else if (level == TRIM_MEMORY_RUNNING_CRITICAL) {
 				LOG.info("Trim memory: running critically low");
-				// If we're not in the foreground, clear the UI to save memory
-				RunningAppProcessInfo info = new RunningAppProcessInfo();
-				ActivityManager.getMyMemoryState(info);
-				if (info.importance != IMPORTANCE_FOREGROUND) hideUi();
+				// Clear the UI to save some memory
+				hideUi();
 			} else if (LOG.isLoggable(INFO)) {
 				LOG.info("Trim memory: unknown level " + level);
 			}

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

@@ -1,92 +0,0 @@
-package org.briarproject.briar.android;
-
-import android.content.Context;
-import android.content.SharedPreferences;
-import android.content.res.Configuration;
-import android.content.res.Resources;
-
-import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
-
-import java.util.Locale;
-
-import javax.annotation.Nullable;
-
-import static android.os.Build.VERSION.SDK_INT;
-import static org.briarproject.briar.android.settings.SettingsFragment.LANGUAGE;
-
-@NotNullByDefault
-public class Localizer {
-
-	// Locking: class
-	@Nullable
-	private static Localizer INSTANCE;
-	private final Locale systemLocale;
-	private final Locale locale;
-
-	private Localizer(SharedPreferences sharedPreferences) {
-		this(Locale.getDefault(), getLocaleFromTag(
-				sharedPreferences.getString(LANGUAGE, "default")));
-	}
-
-	private Localizer(Locale systemLocale, @Nullable Locale userLocale) {
-		this.systemLocale = systemLocale;
-		if (userLocale == null) locale = systemLocale;
-		else locale = userLocale;
-	}
-
-	// Instantiate the Localizer.
-	public static synchronized void initialize(SharedPreferences prefs) {
-		if (INSTANCE == null)
-			INSTANCE = new Localizer(prefs);
-	}
-
-	// Reinstantiate the Localizer with the system locale
-	public static synchronized void reinitialize() {
-		if (INSTANCE != null)
-			INSTANCE = new Localizer(INSTANCE.systemLocale, null);
-	}
-
-	// Get the current instance.
-	public static synchronized Localizer getInstance() {
-		if (INSTANCE == null)
-			throw new IllegalStateException("Localizer not initialized");
-		return INSTANCE;
-	}
-
-	// Get Locale from BCP-47 tag
-	@Nullable
-	public static Locale getLocaleFromTag(String tag) {
-		if (tag.equals("default"))
-			return null;
-		if (SDK_INT >= 21) {
-			return Locale.forLanguageTag(tag);
-		}
-		if (tag.contains("-")) {
-			String[] langArray = tag.split("-");
-			return new Locale(langArray[0], langArray[1]);
-		} else
-			return new Locale(tag);
-	}
-
-	// Returns the localized version of context
-	public Context setLocale(Context context) {
-		Resources res = context.getResources();
-		Configuration conf = res.getConfiguration();
-		Locale currentLocale;
-		if (SDK_INT >= 24) {
-			currentLocale = conf.getLocales().get(0);
-		} else
-			currentLocale = conf.locale;
-		if (locale.equals(currentLocale))
-			return context;
-		Locale.setDefault(locale);
-		if (SDK_INT >= 17) {
-			conf.setLocale(locale);
-			context.createConfigurationContext(conf);
-		} else
-			conf.locale = locale;
-		//noinspection deprecation
-		res.updateConfiguration(conf, res.getDisplayMetrics());
-		return context;
-	}
-}

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

@@ -4,11 +4,11 @@ import android.net.TrafficStats;
 import android.os.Process;
 
 import org.briarproject.bramble.api.lifecycle.Service;
+import org.briarproject.bramble.api.lifecycle.ServiceException;
 
 import java.util.logging.Logger;
 
 import static java.util.logging.Level.INFO;
-import static org.briarproject.bramble.util.LogUtils.now;
 
 class NetworkUsageLogger implements Service {
 
@@ -18,17 +18,17 @@ class NetworkUsageLogger implements Service {
 	private volatile long startTime, rxBytes, txBytes;
 
 	@Override
-	public void startService() {
-		startTime = now();
+	public void startService() throws ServiceException {
+		startTime = System.currentTimeMillis();
 		int uid = Process.myUid();
 		rxBytes = TrafficStats.getUidRxBytes(uid);
 		txBytes = TrafficStats.getUidTxBytes(uid);
 	}
 
 	@Override
-	public void stopService() {
+	public void stopService() throws ServiceException {
 		if (LOG.isLoggable(INFO)) {
-			long sessionDuration = now() - startTime;
+			long sessionDuration = System.currentTimeMillis() - startTime;
 			int uid = Process.myUid();
 			long rx = TrafficStats.getUidRxBytes(uid) - rxBytes;
 			long tx = TrafficStats.getUidTxBytes(uid) - txBytes;

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

@@ -0,0 +1,83 @@
+package org.briarproject.briar.android;
+
+import org.briarproject.briar.api.android.ReferenceManager;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.concurrent.locks.Lock;
+import java.util.concurrent.locks.ReentrantLock;
+import java.util.logging.Logger;
+
+import static java.util.logging.Level.INFO;
+
+class ReferenceManagerImpl implements ReferenceManager {
+
+	private static final Logger LOG =
+			Logger.getLogger(ReferenceManagerImpl.class.getName());
+
+	private final Lock lock = new ReentrantLock();
+
+	// The following are locking: lock
+	private final Map<Class<?>, Map<Long, Object>> outerMap = new HashMap<>();
+	private long nextHandle = 0;
+
+	@Override
+	public <T> T getReference(long handle, Class<T> c) {
+		lock.lock();
+		try {
+			Map<Long, Object> innerMap = outerMap.get(c);
+			if (innerMap == null) {
+				if (LOG.isLoggable(INFO))
+					LOG.info("0 handles for " + c.getName());
+				return null;
+			}
+			if (LOG.isLoggable(INFO))
+				LOG.info(innerMap.size() + " handles for " + c.getName());
+			Object o = innerMap.get(handle);
+			return c.cast(o);
+		} finally {
+			lock.unlock();
+		}
+
+	}
+
+	@Override
+	public <T> long putReference(T reference, Class<T> c) {
+		lock.lock();
+		try {
+			Map<Long, Object> innerMap = outerMap.get(c);
+			if (innerMap == null) {
+				innerMap = new HashMap<>();
+				outerMap.put(c, innerMap);
+			}
+			long handle = nextHandle++;
+			innerMap.put(handle, reference);
+			if (LOG.isLoggable(INFO)) {
+				LOG.info(innerMap.size() + " handles for " + c.getName() +
+						" after put");
+			}
+			return handle;
+		} finally {
+			lock.unlock();
+		}
+	}
+
+	@Override
+	public <T> T removeReference(long handle, Class<T> c) {
+		lock.lock();
+		try {
+			Map<Long, Object> innerMap = outerMap.get(c);
+			if (innerMap == null) return null;
+			Object o = innerMap.remove(handle);
+			if (innerMap.isEmpty()) outerMap.remove(c);
+			if (LOG.isLoggable(INFO)) {
+				LOG.info(innerMap.size() + " handles for " + c.getName() +
+						" after remove");
+			}
+			return c.cast(o);
+		} finally {
+			lock.unlock();
+		}
+
+	}
+}

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

@@ -48,7 +48,6 @@ import static android.content.pm.PackageManager.GET_PERMISSIONS;
 import static android.content.pm.PackageManager.GET_SIGNATURES;
 import static android.os.Build.VERSION.SDK_INT;
 import static java.util.logging.Level.WARNING;
-import static org.briarproject.bramble.util.LogUtils.logException;
 
 @NotNullByDefault
 class ScreenFilterMonitorImpl implements ScreenFilterMonitor, Service {
@@ -190,7 +189,7 @@ class ScreenFilterMonitorImpl implements ScreenFilterMonitor, Service {
 			String publicKey = StringUtils.toHexString(publicKeyBytes);
 			return PLAY_SERVICES_PUBLIC_KEY.equals(publicKey);
 		} catch (NameNotFoundException | CertificateException e) {
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 			return false;
 		}
 	}

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

@@ -30,14 +30,4 @@ 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 the dark UI theme in release builds.
-	 */
-	boolean FEATURE_FLAG_DARK_THEME = false;
-
-	/**
-	 * Feature flag for enabling the sign-in reminder in release builds.
-	 */
-	boolean FEATURE_FLAG_SIGN_IN_REMINDER = IS_DEBUG_BUILD;
 }

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

@@ -26,10 +26,9 @@ import org.briarproject.briar.android.fragment.ScreenFilterDialogFragment;
 import org.briarproject.briar.android.introduction.ContactChooserFragment;
 import org.briarproject.briar.android.introduction.IntroductionActivity;
 import org.briarproject.briar.android.introduction.IntroductionMessageFragment;
-import org.briarproject.briar.android.keyagreement.ContactExchangeActivity;
 import org.briarproject.briar.android.keyagreement.IntroFragment;
 import org.briarproject.briar.android.keyagreement.KeyAgreementActivity;
-import org.briarproject.briar.android.keyagreement.KeyAgreementFragment;
+import org.briarproject.briar.android.keyagreement.ShowQrCodeFragment;
 import org.briarproject.briar.android.login.AuthorNameFragment;
 import org.briarproject.briar.android.login.ChangePasswordActivity;
 import org.briarproject.briar.android.login.DozeFragment;
@@ -101,8 +100,6 @@ public interface ActivityComponent {
 
 	void inject(PanicPreferencesActivity activity);
 
-	void inject(ContactExchangeActivity activity);
-
 	void inject(KeyAgreementActivity activity);
 
 	void inject(ConversationActivity activity);
@@ -188,7 +185,7 @@ public interface ActivityComponent {
 
 	void inject(IntroFragment fragment);
 
-	void inject(KeyAgreementFragment fragment);
+	void inject(ShowQrCodeFragment fragment);
 
 	void inject(ContactChooserFragment fragment);
 

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

@@ -1,6 +1,5 @@
 package org.briarproject.briar.android.activity;
 
-import android.content.Context;
 import android.os.Bundle;
 import android.os.IBinder;
 import android.support.annotation.LayoutRes;
@@ -19,7 +18,6 @@ import org.briarproject.briar.R;
 import org.briarproject.briar.android.AndroidComponent;
 import org.briarproject.briar.android.BriarApplication;
 import org.briarproject.briar.android.DestroyableContext;
-import org.briarproject.briar.android.Localizer;
 import org.briarproject.briar.android.controller.ActivityLifecycleController;
 import org.briarproject.briar.android.forum.ForumModule;
 import org.briarproject.briar.android.fragment.BaseFragment;
@@ -86,12 +84,6 @@ public abstract class BaseActivity extends AppCompatActivity
 		}
 	}
 
-	@Override
-	protected void attachBaseContext(Context base) {
-		super.attachBaseContext(
-				Localizer.getInstance().setLocale(base));
-	}
-
 	public ActivityComponent getActivityComponent() {
 		return activityComponent;
 	}

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

@@ -92,6 +92,7 @@ public abstract class BriarActivity extends BaseActivity {
 		window.setEnterTransition(slide);
 		window.setTransitionBackgroundFadeDuration(getResources()
 				.getInteger(android.R.integer.config_longAnimTime));
+		window.setBackgroundDrawableResource(android.R.color.transparent);
 	}
 
 	/**

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

@@ -32,10 +32,8 @@ import java.util.logging.Logger;
 
 import javax.annotation.Nullable;
 
+import static java.util.logging.Level.INFO;
 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.briar.util.HtmlUtils.ARTICLE;
 
 @MethodsNotNullByDefault
@@ -103,25 +101,30 @@ abstract class BaseControllerImpl extends DbControllerImpl
 				Collection<BlogPostItem> items = loadItems(groupId);
 				handler.onResult(items);
 			} catch (DbException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING))
+					LOG.log(WARNING, e.toString(), e);
 				handler.onException(e);
 			}
 		});
 	}
 
 	Collection<BlogPostItem> loadItems(GroupId groupId) throws DbException {
-		long start = now();
+		long now = System.currentTimeMillis();
 		Collection<BlogPostHeader> headers =
 				blogManager.getPostHeaders(groupId);
-		logDuration(LOG, "Loading headers", start);
+		long duration = System.currentTimeMillis() - now;
+		if (LOG.isLoggable(INFO))
+			LOG.info("Loading headers took " + duration + " ms");
 		Collection<BlogPostItem> items = new ArrayList<>(headers.size());
-		start = now();
+		now = System.currentTimeMillis();
 		for (BlogPostHeader h : headers) {
 			headerCache.put(h.getId(), h);
 			BlogPostItem item = getItem(h);
 			items.add(item);
 		}
-		logDuration(LOG, "Loading bodies", start);
+		duration = System.currentTimeMillis() - now;
+		if (LOG.isLoggable(INFO))
+			LOG.info("Loading bodies took " + duration + " ms");
 		return items;
 	}
 
@@ -137,12 +140,15 @@ abstract class BaseControllerImpl extends DbControllerImpl
 		}
 		runOnDbThread(() -> {
 			try {
-				long start = now();
+				long now = System.currentTimeMillis();
 				BlogPostItem item = getItem(header);
-				logDuration(LOG, "Loading body", start);
+				long duration = System.currentTimeMillis() - now;
+				if (LOG.isLoggable(INFO))
+					LOG.info("Loading body took " + duration + " ms");
 				handler.onResult(item);
 			} catch (DbException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING))
+					LOG.log(WARNING, e.toString(), e);
 				handler.onException(e);
 			}
 		});
@@ -160,13 +166,16 @@ abstract class BaseControllerImpl extends DbControllerImpl
 		}
 		runOnDbThread(() -> {
 			try {
-				long start = now();
+				long now = System.currentTimeMillis();
 				BlogPostHeader header1 = getPostHeader(g, m);
 				BlogPostItem item = getItem(header1);
-				logDuration(LOG, "Loading post", start);
+				long duration = System.currentTimeMillis() - now;
+				if (LOG.isLoggable(INFO))
+					LOG.info("Loading post took " + duration + " ms");
 				handler.onResult(item);
 			} catch (DbException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING))
+					LOG.log(WARNING, e.toString(), e);
 				handler.onException(e);
 			}
 		});
@@ -182,7 +191,8 @@ abstract class BaseControllerImpl extends DbControllerImpl
 				BlogPostHeader h = item.getHeader();
 				blogManager.addLocalComment(a, b.getId(), comment, h);
 			} catch (DbException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING))
+					LOG.log(WARNING, e.toString(), e);
 				handler.onException(e);
 			}
 		});

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

@@ -35,10 +35,8 @@ import java.util.logging.Logger;
 
 import javax.inject.Inject;
 
+import static java.util.logging.Level.INFO;
 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;
 
 @MethodsNotNullByDefault
 @ParametersNotNullByDefault
@@ -156,16 +154,19 @@ class BlogControllerImpl extends BaseControllerImpl
 		if (groupId == null) throw new IllegalStateException();
 		runOnDbThread(() -> {
 			try {
-				long start = now();
+				long now = System.currentTimeMillis();
 				LocalAuthor a = identityManager.getLocalAuthor();
 				Blog b = blogManager.getBlog(groupId);
 				boolean ours = a.getId().equals(b.getAuthor().getId());
 				boolean removable = blogManager.canBeRemoved(b);
 				BlogItem blog = new BlogItem(b, ours, removable);
-				logDuration(LOG, "Loading blog", start);
+				long duration = System.currentTimeMillis() - now;
+				if (LOG.isLoggable(INFO))
+					LOG.info("Loading blog took " + duration + " ms");
 				handler.onResult(blog);
 			} catch (DbException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING))
+					LOG.log(WARNING, e.toString(), e);
 				handler.onException(e);
 			}
 		});
@@ -176,13 +177,16 @@ class BlogControllerImpl extends BaseControllerImpl
 		if (groupId == null) throw new IllegalStateException();
 		runOnDbThread(() -> {
 			try {
-				long start = now();
+				long now = System.currentTimeMillis();
 				Blog b = blogManager.getBlog(groupId);
 				blogManager.removeBlog(b);
-				logDuration(LOG, "Removing blog", start);
+				long duration = System.currentTimeMillis() - now;
+				if (LOG.isLoggable(INFO))
+					LOG.info("Removing blog took " + duration + " ms");
 				handler.onResult(null);
 			} catch (DbException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING))
+					LOG.log(WARNING, e.toString(), e);
 				handler.onException(e);
 			}
 		});
@@ -201,7 +205,8 @@ class BlogControllerImpl extends BaseControllerImpl
 				for (Contact c : contacts) contactIds.add(c.getId());
 				handler.onResult(contactIds);
 			} catch (DbException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING))
+					LOG.log(WARNING, e.toString(), e);
 				handler.onException(e);
 			}
 		});

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

@@ -11,7 +11,7 @@ import android.text.Spanned;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
-import android.widget.ImageButton;
+import android.widget.ImageView;
 import android.widget.TextView;
 
 import org.briarproject.bramble.api.identity.Author;
@@ -40,7 +40,7 @@ class BlogPostViewHolder extends RecyclerView.ViewHolder {
 	private final ViewGroup layout;
 	private final AuthorView reblogger;
 	private final AuthorView author;
-	private final ImageButton reblogButton;
+	private final ImageView reblogButton;
 	private final TextView body;
 	private final ViewGroup commentContainer;
 	private final boolean fullText;

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

@@ -26,10 +26,8 @@ import java.util.logging.Logger;
 
 import javax.inject.Inject;
 
+import static java.util.logging.Level.INFO;
 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.briar.api.blog.BlogManager.CLIENT_ID;
 
 @MethodsNotNullByDefault
@@ -101,19 +99,22 @@ class FeedControllerImpl extends BaseControllerImpl
 			ResultExceptionHandler<Collection<BlogPostItem>, DbException> handler) {
 		runOnDbThread(() -> {
 			try {
-				long start = now();
+				long now = System.currentTimeMillis();
 				Collection<BlogPostItem> posts = new ArrayList<>();
 				for (Blog b : blogManager.getBlogs()) {
 					try {
 						posts.addAll(loadItems(b.getId()));
 					} catch (NoSuchGroupException | NoSuchMessageException e) {
-						logException(LOG, WARNING, e);
+						if (LOG.isLoggable(WARNING))
+							LOG.log(WARNING, e.toString(), e);
 					}
 				}
-				logDuration(LOG, "Loading all posts", start);
+				long duration = System.currentTimeMillis() - now;
+				if (LOG.isLoggable(INFO))
+					LOG.info("Loading all posts took " + duration + " ms");
 				handler.onResult(posts);
 			} catch (DbException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 				handler.onException(e);
 			}
 		});
@@ -124,13 +125,15 @@ class FeedControllerImpl extends BaseControllerImpl
 			ResultExceptionHandler<Blog, DbException> handler) {
 		runOnDbThread(() -> {
 			try {
-				long start = now();
+				long now = System.currentTimeMillis();
 				Author a = identityManager.getLocalAuthor();
 				Blog b = blogManager.getPersonalBlog(a);
-				logDuration(LOG, "Loading personal blog", start);
+				long duration = System.currentTimeMillis() - now;
+				if (LOG.isLoggable(INFO))
+					LOG.info("Loading blog took " + duration + " ms");
 				handler.onResult(b);
 			} catch (DbException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 				handler.onException(e);
 			}
 		});

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

@@ -30,7 +30,6 @@ import javax.inject.Inject;
 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;
 
 public class RssFeedImportActivity extends BriarActivity {
 
@@ -125,7 +124,7 @@ public class RssFeedImportActivity extends BriarActivity {
 				feedManager.addFeed(url);
 				feedImported();
 			} catch (DbException | IOException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 				importFailed();
 			}
 		});

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

@@ -27,7 +27,6 @@ import javax.inject.Inject;
 import static android.content.Intent.FLAG_ACTIVITY_CLEAR_TOP;
 import static android.support.design.widget.Snackbar.LENGTH_LONG;
 import static java.util.logging.Level.WARNING;
-import static org.briarproject.bramble.util.LogUtils.logException;
 
 public class RssFeedManageActivity extends BriarActivity
 		implements RssFeedListener {
@@ -124,7 +123,7 @@ public class RssFeedManageActivity extends BriarActivity
 			try {
 				displayFeeds(revision, feedManager.getFeeds());
 			} catch (DbException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 				onLoadError();
 			}
 		});
@@ -149,7 +148,7 @@ public class RssFeedManageActivity extends BriarActivity
 				feedManager.removeFeed(feed);
 				onFeedDeleted(feed);
 			} catch (DbException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 				onDeleteError();
 			}
 		});

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

@@ -34,7 +34,6 @@ import javax.inject.Inject;
 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.briar.api.blog.BlogConstants.MAX_BLOG_POST_BODY_LENGTH;
 
 public class WriteBlogPostActivity extends BriarActivity
@@ -143,16 +142,16 @@ public class WriteBlogPostActivity extends BriarActivity
 
 	private void storePost(String body) {
 		runOnDbThread(() -> {
-			long timestamp = System.currentTimeMillis();
+			long now = System.currentTimeMillis();
 			try {
 				LocalAuthor author = identityManager.getLocalAuthor();
 				BlogPost p = blogPostFactory
-						.createBlogPost(groupId, timestamp, null, author, body);
+						.createBlogPost(groupId, now, null, author, body);
 				blogManager.addLocalPost(p);
 				postPublished();
 			} catch (DbException | GeneralSecurityException
 					| FormatException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 				postFailedToPublish();
 			}
 		});

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

@@ -33,7 +33,7 @@ import org.briarproject.briar.R;
 import org.briarproject.briar.android.activity.ActivityComponent;
 import org.briarproject.briar.android.contact.BaseContactListAdapter.OnContactClickListener;
 import org.briarproject.briar.android.fragment.BaseFragment;
-import org.briarproject.briar.android.keyagreement.ContactExchangeActivity;
+import org.briarproject.briar.android.keyagreement.KeyAgreementActivity;
 import org.briarproject.briar.android.view.BriarRecyclerView;
 import org.briarproject.briar.api.android.AndroidNotificationManager;
 import org.briarproject.briar.api.client.BaseMessageHeader;
@@ -59,10 +59,8 @@ import javax.inject.Inject;
 
 import static android.support.v4.app.ActivityOptionsCompat.makeSceneTransitionAnimation;
 import static android.support.v4.view.ViewCompat.getTransitionName;
+import static java.util.logging.Level.INFO;
 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.briar.android.contact.ConversationActivity.CONTACT_ID;
 
 @MethodsNotNullByDefault
@@ -165,7 +163,7 @@ public class ContactListFragment extends BaseFragment implements EventListener {
 		switch (item.getItemId()) {
 			case R.id.action_add_contact:
 				Intent intent =
-						new Intent(getContext(), ContactExchangeActivity.class);
+						new Intent(getContext(), KeyAgreementActivity.class);
 				startActivity(intent);
 				return true;
 			default:
@@ -196,7 +194,7 @@ public class ContactListFragment extends BaseFragment implements EventListener {
 		int revision = adapter.getRevision();
 		listener.runOnDbThread(() -> {
 			try {
-				long start = now();
+				long now = System.currentTimeMillis();
 				List<ContactListItem> contacts = new ArrayList<>();
 				for (Contact c : contactManager.getActiveContacts()) {
 					try {
@@ -210,10 +208,12 @@ public class ContactListFragment extends BaseFragment implements EventListener {
 						// Continue
 					}
 				}
-				logDuration(LOG, "Full load", start);
+				long duration = System.currentTimeMillis() - now;
+				if (LOG.isLoggable(INFO))
+					LOG.info("Full load took " + duration + " ms");
 				displayContacts(revision, contacts);
 			} catch (DbException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 			}
 		});
 	}

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

@@ -106,9 +106,6 @@ import static android.support.v7.util.SortedList.INVALID_POSITION;
 import static android.widget.Toast.LENGTH_SHORT;
 import static java.util.logging.Level.INFO;
 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.briar.android.activity.RequestCodes.REQUEST_INTRODUCTION;
 import static org.briarproject.briar.android.settings.SettingsFragment.SETTINGS_NAMESPACE;
 import static org.briarproject.briar.android.util.UiUtils.getAvatarTransitionName;
@@ -293,19 +290,21 @@ public class ConversationActivity extends BriarActivity
 	private void loadContactDetailsAndMessages() {
 		runOnDbThread(() -> {
 			try {
-				long start = now();
+				long now = System.currentTimeMillis();
 				if (contactName == null || contactAuthorId == null) {
 					Contact contact = contactManager.getContact(contactId);
 					contactName = contact.getAuthor().getName();
 					contactAuthorId = contact.getAuthor().getId();
 				}
-				logDuration(LOG, "Loading contact", start);
+				long duration = System.currentTimeMillis() - now;
+				if (LOG.isLoggable(INFO))
+					LOG.info("Loading contact took " + duration + " ms");
 				loadMessages();
 				displayContactDetails();
 			} catch (NoSuchContactException e) {
 				finishOnUiThread();
 			} catch (DbException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 			}
 		});
 	}
@@ -341,7 +340,7 @@ public class ConversationActivity extends BriarActivity
 		int revision = adapter.getRevision();
 		runOnDbThread(() -> {
 			try {
-				long start = now();
+				long now = System.currentTimeMillis();
 				Collection<PrivateMessageHeader> headers =
 						messagingManager.getMessageHeaders(contactId);
 				Collection<IntroductionMessage> introductions =
@@ -358,12 +357,14 @@ public class ConversationActivity extends BriarActivity
 				invitations.addAll(forumInvitations);
 				invitations.addAll(blogInvitations);
 				invitations.addAll(groupInvitations);
-				logDuration(LOG, "Loading messages", start);
+				long duration = System.currentTimeMillis() - now;
+				if (LOG.isLoggable(INFO))
+					LOG.info("Loading messages took " + duration + " ms");
 				displayMessages(revision, headers, introductions, invitations);
 			} catch (NoSuchContactException e) {
 				finishOnUiThread();
 			} catch (DbException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 			}
 		});
 	}
@@ -437,12 +438,14 @@ public class ConversationActivity extends BriarActivity
 	private void loadMessageBody(MessageId m) {
 		runOnDbThread(() -> {
 			try {
-				long start = now();
+				long now = System.currentTimeMillis();
 				String body = messagingManager.getMessageBody(m);
-				logDuration(LOG, "Loading body", start);
+				long duration = System.currentTimeMillis() - now;
+				if (LOG.isLoggable(INFO))
+					LOG.info("Loading body took " + duration + " ms");
 				displayMessageBody(m, body);
 			} catch (DbException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 			}
 		});
 	}
@@ -666,7 +669,7 @@ public class ConversationActivity extends BriarActivity
 						messagingManager.getConversationId(contactId);
 				createMessage(body, timestamp);
 			} catch (DbException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 			}
 
 		});
@@ -686,9 +689,11 @@ public class ConversationActivity extends BriarActivity
 	private void storeMessage(PrivateMessage m, String body) {
 		runOnDbThread(() -> {
 			try {
-				long start = now();
+				long now = System.currentTimeMillis();
 				messagingManager.addLocalMessage(m);
-				logDuration(LOG, "Storing message", start);
+				long duration = System.currentTimeMillis() - now;
+				if (LOG.isLoggable(INFO))
+					LOG.info("Storing message took " + duration + " ms");
 				Message message = m.getMessage();
 				PrivateMessageHeader h = new PrivateMessageHeader(
 						message.getId(), message.getGroupId(),
@@ -698,7 +703,7 @@ public class ConversationActivity extends BriarActivity
 				bodyCache.put(message.getId(), body);
 				addConversationItem(item);
 			} catch (DbException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 			}
 		});
 	}
@@ -721,7 +726,7 @@ public class ConversationActivity extends BriarActivity
 			try {
 				contactManager.removeContact(contactId);
 			} catch (DbException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 			} finally {
 				finishAfterContactRemoved();
 			}
@@ -750,7 +755,7 @@ public class ConversationActivity extends BriarActivity
 					}
 				}
 			} catch (DbException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 			}
 		});
 	}
@@ -798,7 +803,7 @@ public class ConversationActivity extends BriarActivity
 				settings.putBoolean(SHOW_ONBOARDING_INTRODUCTION, false);
 				settingsManager.mergeSettings(settings, SETTINGS_NAMESPACE);
 			} catch (DbException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 			}
 		});
 	}
@@ -811,11 +816,13 @@ public class ConversationActivity extends BriarActivity
 	private void markMessageRead(GroupId g, MessageId m) {
 		runOnDbThread(() -> {
 			try {
-				long start = now();
+				long now = System.currentTimeMillis();
 				messagingManager.setReadFlag(g, m, true);
-				logDuration(LOG, "Marking read", start);
+				long duration = System.currentTimeMillis() - now;
+				if (LOG.isLoggable(INFO))
+					LOG.info("Marking read took " + duration + " ms");
 			} catch (DbException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 			}
 		});
 	}
@@ -853,10 +860,10 @@ public class ConversationActivity extends BriarActivity
 				loadMessages();
 			} catch (ProtocolStateException e) {
 				// Action is no longer valid - reloading should solve the issue
-				logException(LOG, INFO, e);
+				if (LOG.isLoggable(INFO)) LOG.log(INFO, e.toString(), e);
 			} catch (DbException e) {
 				// TODO show an error message
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 			}
 		});
 	}

briar-android/src/main/java/org/briarproject/briar/android/contactselection/ContactSelectorControllerImpl.java

@@ -19,7 +19,6 @@ import java.util.logging.Logger;
 import javax.annotation.concurrent.Immutable;
 
 import static java.util.logging.Level.WARNING;
-import static org.briarproject.bramble.util.LogUtils.logException;
 
 @Immutable
 @NotNullByDefault
@@ -54,7 +53,7 @@ public abstract class ContactSelectorControllerImpl
 				}
 				handler.onResult(contacts);
 			} catch (DbException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 				handler.onException(e);
 			}
 		});

briar-android/src/main/java/org/briarproject/briar/android/controller/BriarControllerImpl.java

@@ -21,7 +21,6 @@ import java.util.logging.Logger;
 import javax.inject.Inject;
 
 import static java.util.logging.Level.WARNING;
-import static org.briarproject.bramble.util.LogUtils.logException;
 import static org.briarproject.briar.android.settings.SettingsFragment.SETTINGS_NAMESPACE;
 import static org.briarproject.briar.android.util.UiUtils.needsDozeWhitelisting;
 
@@ -102,7 +101,8 @@ public class BriarControllerImpl implements BriarController {
 				boolean ask = settings.getBoolean(DOZE_ASK_AGAIN, true);
 				handler.onResult(ask);
 			} catch (DbException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING))
+					LOG.log(WARNING, e.toString(), e);
 			}
 		});
 	}
@@ -115,7 +115,8 @@ public class BriarControllerImpl implements BriarController {
 				settings.putBoolean(DOZE_ASK_AGAIN, false);
 				settingsManager.mergeSettings(settings, SETTINGS_NAMESPACE);
 			} catch (DbException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING))
+					LOG.log(WARNING, e.toString(), e);
 			}
 		});
 	}

briar-android/src/main/java/org/briarproject/briar/android/controller/ConfigControllerImpl.java

@@ -20,7 +20,6 @@ import javax.annotation.Nullable;
 import javax.inject.Inject;
 
 import static java.util.logging.Level.WARNING;
-import static org.briarproject.bramble.util.LogUtils.logException;
 
 @NotNullByDefault
 public class ConfigControllerImpl implements ConfigController {
@@ -90,7 +89,7 @@ public class ConfigControllerImpl implements ConfigController {
 			reader.close();
 			return key;
 		} catch (IOException e) {
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 			return null;
 		}
 	}
@@ -138,7 +137,7 @@ public class ConfigControllerImpl implements ConfigController {
 			LOG.info("Stored second copy of database key in backup file");
 			return true;
 		} catch (IOException e) {
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 			return false;
 		}
 	}

briar-android/src/main/java/org/briarproject/briar/android/forum/CreateForumActivity.java

@@ -28,10 +28,8 @@ import javax.inject.Inject;
 import static android.view.View.GONE;
 import static android.view.View.VISIBLE;
 import static android.widget.Toast.LENGTH_LONG;
+import static java.util.logging.Level.INFO;
 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.briar.api.forum.ForumConstants.MAX_FORUM_NAME_LENGTH;
 
 @MethodsNotNullByDefault
@@ -124,12 +122,14 @@ public class CreateForumActivity extends BriarActivity {
 	private void storeForum(String name) {
 		runOnDbThread(() -> {
 			try {
-				long start = now();
+				long now = System.currentTimeMillis();
 				Forum f = forumManager.addForum(name);
-				logDuration(LOG, "Storing forum", start);
+				long duration = System.currentTimeMillis() - now;
+				if (LOG.isLoggable(INFO))
+					LOG.info("Storing forum took " + duration + " ms");
 				displayForum(f);
 			} catch (DbException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 				finishOnUiThread();
 			}
 		});

briar-android/src/main/java/org/briarproject/briar/android/forum/ForumControllerImpl.java

@@ -39,7 +39,6 @@ import javax.inject.Inject;
 
 import static java.lang.Math.max;
 import static java.util.logging.Level.WARNING;
-import static org.briarproject.bramble.util.LogUtils.logException;
 
 @NotNullByDefault
 class ForumControllerImpl extends
@@ -131,7 +130,7 @@ class ForumControllerImpl extends
 				for (Contact c : contacts) contactIds.add(c.getId());
 				handler.onResult(contactIds);
 			} catch (DbException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 				handler.onException(e);
 			}
 		});
@@ -151,7 +150,7 @@ class ForumControllerImpl extends
 						parentItem.getId() : null;
 				createMessage(body, timestamp, parentId, author, handler);
 			} catch (DbException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 				handler.onException(e);
 			}
 		});

briar-android/src/main/java/org/briarproject/briar/android/forum/ForumListAdapter.java

@@ -2,6 +2,7 @@ package org.briarproject.briar.android.forum;
 
 import android.content.Context;
 import android.content.Intent;
+import android.support.v4.content.ContextCompat;
 import android.support.v7.widget.RecyclerView;
 import android.view.LayoutInflater;
 import android.view.View;
@@ -54,8 +55,12 @@ class ForumListAdapter
 			ui.postCount.setText(ctx.getResources()
 					.getQuantityString(R.plurals.posts, postCount,
 							postCount));
+			ui.postCount.setTextColor(
+					ContextCompat.getColor(ctx, R.color.briar_text_secondary));
 		} else {
 			ui.postCount.setText(ctx.getString(R.string.no_posts));
+			ui.postCount.setTextColor(
+					ContextCompat.getColor(ctx, R.color.briar_text_tertiary));
 		}
 
 		// Date

briar-android/src/main/java/org/briarproject/briar/android/forum/ForumListFragment.java

@@ -44,10 +44,8 @@ import javax.annotation.Nullable;
 import javax.inject.Inject;
 
 import static android.support.design.widget.Snackbar.LENGTH_INDEFINITE;
+import static java.util.logging.Level.INFO;
 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.briar.api.forum.ForumManager.CLIENT_ID;
 
 @MethodsNotNullByDefault
@@ -159,7 +157,7 @@ public class ForumListFragment extends BaseEventFragment implements
 		int revision = adapter.getRevision();
 		listener.runOnDbThread(() -> {
 			try {
-				long start = now();
+				long now = System.currentTimeMillis();
 				Collection<ForumListItem> forums = new ArrayList<>();
 				for (Forum f : forumManager.getForums()) {
 					try {
@@ -170,10 +168,12 @@ public class ForumListFragment extends BaseEventFragment implements
 						// Continue
 					}
 				}
-				logDuration(LOG, "Full load", start);
+				long duration = System.currentTimeMillis() - now;
+				if (LOG.isLoggable(INFO))
+					LOG.info("Full load took " + duration + " ms");
 				displayForums(revision, forums);
 			} catch (DbException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 			}
 		});
 	}
@@ -194,12 +194,14 @@ public class ForumListFragment extends BaseEventFragment implements
 	private void loadAvailableForums() {
 		listener.runOnDbThread(() -> {
 			try {
-				long start = now();
+				long now = System.currentTimeMillis();
 				int available = forumSharingManager.getInvitations().size();
-				logDuration(LOG, "Loading available", start);
+				long duration = System.currentTimeMillis() - now;
+				if (LOG.isLoggable(INFO))
+					LOG.info("Loading available took " + duration + " ms");
 				displayAvailableForums(available);
 			} catch (DbException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 			}
 		});
 	}

briar-android/src/main/java/org/briarproject/briar/android/fragment/BaseFragment.java

@@ -6,7 +6,6 @@ import android.os.Bundle;
 import android.support.annotation.CallSuper;
 import android.support.annotation.UiThread;
 import android.support.v4.app.Fragment;
-import android.support.v4.app.FragmentActivity;
 import android.view.MenuItem;
 
 import org.briarproject.bramble.api.db.DbException;
@@ -57,8 +56,8 @@ public abstract class BaseFragment extends Fragment
 
 	@UiThread
 	protected void finish() {
-		FragmentActivity activity = getActivity();
-		if (activity != null) activity.supportFinishAfterTransition();
+		if (!isDetached())
+			getActivity().supportFinishAfterTransition();
 	}
 
 	public interface BaseFragmentListener {
@@ -86,7 +85,7 @@ public abstract class BaseFragment extends Fragment
 			activity.runOnUiThread(() -> {
 				// Note that we don't have to check if the activity has
 				// been destroyed as the Fragment has not been detached yet
-				if (isAdded() && !activity.isFinishing()) {
+				if (!isDetached() && !activity.isFinishing()) {
 					r.run();
 				}
 			});

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

@@ -29,7 +29,6 @@ import java.util.logging.Logger;
 import javax.inject.Inject;
 
 import static java.util.logging.Level.WARNING;
-import static org.briarproject.bramble.util.LogUtils.logException;
 import static org.briarproject.briar.android.contact.ConversationActivity.CONTACT_ID;
 
 public class ContactChooserFragment extends BaseFragment {
@@ -130,7 +129,7 @@ public class ContactChooserFragment extends BaseFragment {
 				}
 				displayContacts(contacts);
 			} catch (DbException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 			}
 		});
 	}

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

@@ -36,7 +36,6 @@ import static android.view.View.GONE;
 import static android.view.View.VISIBLE;
 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.api.introduction.IntroductionConstants.MAX_REQUEST_MESSAGE_LENGTH;
 
 public class IntroductionMessageFragment extends BaseFragment
@@ -130,7 +129,7 @@ public class IntroductionMessageFragment extends BaseFragment
 				boolean possible = introductionManager.canIntroduce(c1, c2);
 				setUpViews(c1, c2, possible);
 			} catch (DbException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 			}
 		});
 	}
@@ -205,7 +204,7 @@ public class IntroductionMessageFragment extends BaseFragment
 				long timestamp = System.currentTimeMillis();
 				introductionManager.makeIntroduction(c1, c2, msg, timestamp);
 			} catch (DbException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 				introductionError();
 			}
 		});

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

@@ -9,12 +9,10 @@ import android.hardware.Camera.Size;
 import android.support.annotation.Nullable;
 import android.support.annotation.UiThread;
 import android.util.AttributeSet;
-import android.view.Display;
 import android.view.Surface;
 import android.view.SurfaceHolder;
 import android.view.SurfaceView;
 import android.view.View;
-import android.view.WindowManager;
 
 import org.briarproject.bramble.api.nullsafety.MethodsNotNullByDefault;
 import org.briarproject.bramble.api.nullsafety.ParametersNotNullByDefault;
@@ -23,7 +21,6 @@ import java.io.IOException;
 import java.util.List;
 import java.util.logging.Logger;
 
-import static android.content.Context.WINDOW_SERVICE;
 import static android.hardware.Camera.CameraInfo.CAMERA_FACING_BACK;
 import static android.hardware.Camera.CameraInfo.CAMERA_FACING_FRONT;
 import static android.hardware.Camera.Parameters.FLASH_MODE_OFF;
@@ -38,7 +35,6 @@ import static android.hardware.Camera.Parameters.SCENE_MODE_BARCODE;
 import static android.os.Build.VERSION.SDK_INT;
 import static java.util.logging.Level.INFO;
 import static java.util.logging.Level.WARNING;
-import static org.briarproject.bramble.util.LogUtils.logException;
 
 @SuppressWarnings("deprecation")
 @MethodsNotNullByDefault
@@ -100,7 +96,7 @@ public class CameraView extends SurfaceView implements SurfaceHolder.Callback,
 	}
 
 	@UiThread
-	public void start() throws CameraException {
+	public void start(int rotationDegrees) throws CameraException {
 		LOG.info("Opening camera");
 		try {
 			int cameras = Camera.getNumberOfCameras();
@@ -125,7 +121,7 @@ public class CameraView extends SurfaceView implements SurfaceHolder.Callback,
 		} catch (RuntimeException e) {
 			throw new CameraException(e);
 		}
-		setDisplayOrientation(getScreenRotationDegrees());
+		setDisplayOrientation(rotationDegrees);
 		// Use barcode scene mode if it's available
 		Parameters params = camera.getParameters();
 		params = setSceneMode(camera, params);
@@ -160,27 +156,6 @@ public class CameraView extends SurfaceView implements SurfaceHolder.Callback,
 		camera = null;
 	}
 
-	/**
-	 * See {@link Camera#setDisplayOrientation(int)}.
-	 */
-	private int getScreenRotationDegrees() {
-		WindowManager wm =
-				(WindowManager) getContext().getSystemService(WINDOW_SERVICE);
-		Display d = wm.getDefaultDisplay();
-		switch (d.getRotation()) {
-			case Surface.ROTATION_0:
-				return 0;
-			case Surface.ROTATION_90:
-				return 90;
-			case Surface.ROTATION_180:
-				return 180;
-			case Surface.ROTATION_270:
-				return 270;
-			default:
-				throw new AssertionError();
-		}
-	}
-
 	@UiThread
 	private void startPreview(SurfaceHolder holder) throws CameraException {
 		LOG.info("Starting preview");
@@ -433,7 +408,7 @@ public class CameraView extends SurfaceView implements SurfaceHolder.Callback,
 			try {
 				surfaceCreatedUi(holder);
 			} catch (CameraException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 			}
 		});
 	}
@@ -455,7 +430,7 @@ public class CameraView extends SurfaceView implements SurfaceHolder.Callback,
 			try {
 				surfaceChangedUi(holder, w, h);
 			} catch (CameraException e) {
-				logException(LOG, WARNING, e);
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 			}
 		});
 	}
@@ -513,7 +488,7 @@ public class CameraView extends SurfaceView implements SurfaceHolder.Callback,
 		try {
 			startAutoFocus();
 		} catch (CameraException e) {
-			logException(LOG, WARNING, e);
+			LOG.log(WARNING, e.toString(), e);
 		}
 	}
 

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

@@ -1,144 +0,0 @@
-package org.briarproject.briar.android.keyagreement;
-
-import android.os.Bundle;
-import android.support.annotation.UiThread;
-import android.widget.Toast;
-
-import org.briarproject.bramble.api.contact.ContactExchangeListener;
-import org.briarproject.bramble.api.contact.ContactExchangeTask;
-import org.briarproject.bramble.api.db.DbException;
-import org.briarproject.bramble.api.identity.Author;
-import org.briarproject.bramble.api.identity.IdentityManager;
-import org.briarproject.bramble.api.identity.LocalAuthor;
-import org.briarproject.bramble.api.keyagreement.KeyAgreementResult;
-import org.briarproject.bramble.api.nullsafety.MethodsNotNullByDefault;
-import org.briarproject.bramble.api.nullsafety.ParametersNotNullByDefault;
-import org.briarproject.briar.R;
-import org.briarproject.briar.R.string;
-import org.briarproject.briar.android.activity.ActivityComponent;
-
-import java.util.logging.Logger;
-
-import javax.annotation.Nullable;
-import javax.inject.Inject;
-
-import static android.widget.Toast.LENGTH_LONG;
-import static java.util.logging.Level.WARNING;
-import static org.briarproject.bramble.util.LogUtils.logException;
-
-@MethodsNotNullByDefault
-@ParametersNotNullByDefault
-public class ContactExchangeActivity extends KeyAgreementActivity implements
-		ContactExchangeListener {
-
-	private static final Logger LOG =
-			Logger.getLogger(ContactExchangeActivity.class.getName());
-
-	// Fields that are accessed from background threads must be volatile
-	@Inject
-	volatile ContactExchangeTask contactExchangeTask;
-	@Inject
-	volatile IdentityManager identityManager;
-
-	@Override
-	public void injectActivity(ActivityComponent component) {
-		component.inject(this);
-	}
-
-	@Override
-	public void onCreate(@Nullable Bundle state) {
-		super.onCreate(state);
-		getSupportActionBar().setTitle(string.add_contact_title);
-	}
-
-	private void startContactExchange(KeyAgreementResult result) {
-		runOnDbThread(() -> {
-			LocalAuthor localAuthor;
-			// Load the local pseudonym
-			try {
-				localAuthor = identityManager.getLocalAuthor();
-			} catch (DbException e) {
-				logException(LOG, WARNING, e);
-				contactExchangeFailed();
-				return;
-			}
-
-			// Exchange contact details
-			contactExchangeTask.startExchange(ContactExchangeActivity.this,
-					localAuthor, result.getMasterKey(),
-					result.getConnection(), result.getTransportId(),
-					result.wasAlice());
-		});
-	}
-
-	@Override
-	public void contactExchangeSucceeded(Author remoteAuthor) {
-		runOnUiThreadUnlessDestroyed(() -> {
-			String contactName = remoteAuthor.getName();
-			String format = getString(string.contact_added_toast);
-			String text = String.format(format, contactName);
-			Toast.makeText(ContactExchangeActivity.this, text, LENGTH_LONG)
-					.show();
-			supportFinishAfterTransition();
-		});
-	}
-
-	@Override
-	public void duplicateContact(Author remoteAuthor) {
-		runOnUiThreadUnlessDestroyed(() -> {
-			String contactName = remoteAuthor.getName();
-			String format = getString(string.contact_already_exists);
-			String text = String.format(format, contactName);
-			Toast.makeText(ContactExchangeActivity.this, text, LENGTH_LONG)
-					.show();
-			finish();
-		});
-	}
-
-	@Override
-	public void contactExchangeFailed() {
-		runOnUiThreadUnlessDestroyed(() -> {
-			Toast.makeText(ContactExchangeActivity.this,
-					string.contact_exchange_failed, LENGTH_LONG).show();
-			finish();
-		});
-	}
-
-	@UiThread
-	@Override
-	public void keyAgreementFailed() {
-		// TODO show failure somewhere persistent?
-		Toast.makeText(this, R.string.connection_failed,
-				LENGTH_LONG).show();
-	}
-
-	@UiThread
-	@Override
-	public String keyAgreementWaiting() {
-		return getString(R.string.waiting_for_contact_to_scan);
-	}
-
-	@UiThread
-	@Override
-	public String keyAgreementStarted() {
-		return getString(R.string.authenticating_with_device);
-	}
-
-	@UiThread
-	@Override
-	public String keyAgreementAborted(boolean remoteAborted) {
-		// TODO show abort somewhere persistent?
-		Toast.makeText(this,
-				remoteAborted ? R.string.connection_aborted_remote :
-						R.string.connection_aborted_local, LENGTH_LONG)
-				.show();
-		return null;
-	}
-
-	@UiThread
-	@Override
-	public String keyAgreementFinished(KeyAgreementResult result) {
-		startContactExchange(result);
-		return getString(string.exchanging_contact_details);
-	}
-}

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

@@ -16,7 +16,17 @@ import android.support.v7.widget.Toolbar;
 import android.view.MenuItem;
 import android.widget.Toast;
 
+import org.briarproject.bramble.api.contact.ContactExchangeListener;
+import org.briarproject.bramble.api.contact.ContactExchangeTask;
+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.bramble.api.identity.Author;
+import org.briarproject.bramble.api.identity.IdentityManager;
+import org.briarproject.bramble.api.identity.LocalAuthor;
+import org.briarproject.bramble.api.keyagreement.KeyAgreementResult;
+import org.briarproject.bramble.api.keyagreement.event.KeyAgreementFinishedEvent;
 import org.briarproject.bramble.api.nullsafety.MethodsNotNullByDefault;
 import org.briarproject.bramble.api.nullsafety.ParametersNotNullByDefault;
 import org.briarproject.bramble.api.plugin.event.BluetoothEnabledEvent;
@@ -43,14 +53,15 @@ import static android.bluetooth.BluetoothAdapter.STATE_ON;
 import static android.content.pm.PackageManager.PERMISSION_GRANTED;
 import static android.os.Build.VERSION.SDK_INT;
 import static android.widget.Toast.LENGTH_LONG;
+import static java.util.logging.Level.WARNING;
 import static org.briarproject.briar.android.activity.RequestCodes.REQUEST_ENABLE_BLUETOOTH;
 import static org.briarproject.briar.android.activity.RequestCodes.REQUEST_PERMISSION_CAMERA;
 
 @MethodsNotNullByDefault
 @ParametersNotNullByDefault
-public abstract class KeyAgreementActivity extends BriarActivity implements
-		BaseFragmentListener, IntroScreenSeenListener,
-		KeyAgreementFragment.KeyAgreementEventListener {
+public class KeyAgreementActivity extends BriarActivity implements
+		BaseFragmentListener, IntroScreenSeenListener, EventListener,
+		ContactExchangeListener {
 
 	private enum BluetoothState {
 		UNKNOWN, NO_ADAPTER, WAITING, REFUSED, ENABLED
@@ -62,6 +73,12 @@ public abstract class KeyAgreementActivity extends BriarActivity implements
 	@Inject
 	EventBus eventBus;
 
+	// Fields that are accessed from background threads must be volatile
+	@Inject
+	volatile ContactExchangeTask contactExchangeTask;
+	@Inject
+	volatile IdentityManager identityManager;
+
 	private boolean isResumed = false, enableWasRequested = false;
 	private boolean continueClicked, gotCameraPermission;
 	private BluetoothState bluetoothState = BluetoothState.UNKNOWN;
@@ -77,9 +94,13 @@ public abstract class KeyAgreementActivity extends BriarActivity implements
 	public void onCreate(@Nullable Bundle state) {
 		super.onCreate(state);
 		setContentView(R.layout.activity_fragment_container_toolbar);
+
 		Toolbar toolbar = findViewById(R.id.toolbar);
+
 		setSupportActionBar(toolbar);
 		getSupportActionBar().setDisplayHomeAsUpEnabled(true);
+
+		getSupportActionBar().setTitle(R.string.add_contact_title);
 		if (state == null) {
 			showInitialFragment(IntroFragment.newInstance());
 		}
@@ -94,6 +115,18 @@ public abstract class KeyAgreementActivity extends BriarActivity implements
 		if (bluetoothReceiver != null) unregisterReceiver(bluetoothReceiver);
 	}
 
+	@Override
+	public void onStart() {
+		super.onStart();
+		eventBus.addListener(this);
+	}
+
+	@Override
+	protected void onStop() {
+		super.onStop();
+		eventBus.removeListener(this);
+	}
+
 	@Override
 	public boolean onOptionsItemSelected(MenuItem item) {
 		switch (item.getItemId()) {
@@ -114,7 +147,7 @@ public abstract class KeyAgreementActivity extends BriarActivity implements
 		if (canShowQrCodeFragment()) showQrCodeFragment();
 	}
 
-	private boolean canShowQrCodeFragment() {
+	boolean canShowQrCodeFragment() {
 		return isResumed && continueClicked
 				&& (SDK_INT < 23 || gotCameraPermission)
 				&& bluetoothState != BluetoothState.UNKNOWN
@@ -173,11 +206,10 @@ public abstract class KeyAgreementActivity extends BriarActivity implements
 	}
 
 	private void showQrCodeFragment() {
-		continueClicked = false;
 		// FIXME #824
 		FragmentManager fm = getSupportFragmentManager();
-		if (fm.findFragmentByTag(KeyAgreementFragment.TAG) == null) {
-			BaseFragment f = KeyAgreementFragment.newInstance();
+		if (fm.findFragmentByTag(ShowQrCodeFragment.TAG) == null) {
+			BaseFragment f = ShowQrCodeFragment.newInstance();
 			fm.beginTransaction()
 					.replace(R.id.fragmentContainer, f, f.getUniqueTag())
 					.addToBackStack(f.getUniqueTag())
@@ -247,6 +279,69 @@ public abstract class KeyAgreementActivity extends BriarActivity implements
 		}
 	}
 
+	@Override
+	public void eventOccurred(Event e) {
+		if (e instanceof KeyAgreementFinishedEvent) {
+			KeyAgreementFinishedEvent event = (KeyAgreementFinishedEvent) e;
+			keyAgreementFinished(event.getResult());
+		}
+	}
+
+	private void keyAgreementFinished(KeyAgreementResult result) {
+		runOnUiThreadUnlessDestroyed(() -> startContactExchange(result));
+	}
+
+	private void startContactExchange(KeyAgreementResult result) {
+		runOnDbThread(() -> {
+			LocalAuthor localAuthor;
+			// Load the local pseudonym
+			try {
+				localAuthor = identityManager.getLocalAuthor();
+			} catch (DbException e) {
+				if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
+				contactExchangeFailed();
+				return;
+			}
+
+			// Exchange contact details
+			contactExchangeTask.startExchange(KeyAgreementActivity.this,
+					localAuthor, result.getMasterKey(),
+					result.getConnection(), result.getTransportId(),
+					result.wasAlice());
+		});
+	}
+
+	@Override
+	public void contactExchangeSucceeded(Author remoteAuthor) {
+		runOnUiThreadUnlessDestroyed(() -> {
+			String contactName = remoteAuthor.getName();
+			String format = getString(string.contact_added_toast);
+			String text = String.format(format, contactName);
+			Toast.makeText(KeyAgreementActivity.this, text, LENGTH_LONG).show();
+			supportFinishAfterTransition();
+		});
+	}
+
+	@Override
+	public void duplicateContact(Author remoteAuthor) {
+		runOnUiThreadUnlessDestroyed(() -> {
+			String contactName = remoteAuthor.getName();
+			String format = getString(string.contact_already_exists);
+			String text = String.format(format, contactName);
+			Toast.makeText(KeyAgreementActivity.this, text, LENGTH_LONG).show();
+			finish();
+		});
+	}
+
+	@Override
+	public void contactExchangeFailed() {
+		runOnUiThreadUnlessDestroyed(() -> {
+			Toast.makeText(KeyAgreementActivity.this,
+					string.contact_exchange_failed, LENGTH_LONG).show();
+			finish();
+		});
+	}
+
 	private class BluetoothStateReceiver extends BroadcastReceiver {
 
 		@Override

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

@@ -18,7 +18,6 @@ import static android.graphics.Color.BLACK;
 import static android.graphics.Color.WHITE;
 import static com.google.zxing.BarcodeFormat.QR_CODE;
 import static java.util.logging.Level.WARNING;
-import static org.briarproject.bramble.util.LogUtils.logException;
 
 @NotNullByDefault
 class QrCodeUtils {
@@ -35,7 +34,7 @@ class QrCodeUtils {
 					smallestDimen, smallestDimen);
 			return renderQrCode(encoded);
 		} catch (WriterException e) {
-			logException(LOG, WARNING, e);
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 			return null;
 		}
 	}

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

@@ -2,12 +2,18 @@ package org.briarproject.briar.android.keyagreement;
 
 import android.content.Context;
 import android.graphics.Bitmap;
+import android.hardware.Camera;
+import android.os.AsyncTask;
 import android.os.Bundle;
 import android.support.annotation.UiThread;
 import android.util.DisplayMetrics;
+import android.view.Display;
 import android.view.LayoutInflater;
+import android.view.Surface;
 import android.view.View;
 import android.view.ViewGroup;
+import android.view.animation.AlphaAnimation;
+import android.widget.ImageView;
 import android.widget.LinearLayout;
 import android.widget.LinearLayout.LayoutParams;
 import android.widget.TextView;
@@ -18,7 +24,6 @@ import com.google.zxing.Result;
 import org.briarproject.bramble.api.UnsupportedVersionException;
 import org.briarproject.bramble.api.event.Event;
 import org.briarproject.bramble.api.event.EventBus;
-import org.briarproject.bramble.api.keyagreement.KeyAgreementResult;
 import org.briarproject.bramble.api.keyagreement.KeyAgreementTask;
 import org.briarproject.bramble.api.keyagreement.Payload;
 import org.briarproject.bramble.api.keyagreement.PayloadEncoder;
@@ -31,13 +36,11 @@ import org.briarproject.bramble.api.keyagreement.event.KeyAgreementStartedEvent;
 import org.briarproject.bramble.api.keyagreement.event.KeyAgreementWaitingEvent;
 import org.briarproject.bramble.api.lifecycle.IoExecutor;
 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.activity.ActivityComponent;
 import org.briarproject.briar.android.fragment.BaseEventFragment;
 import org.briarproject.briar.android.fragment.ErrorFragment;
-import org.briarproject.briar.android.view.QrCodeView;
 
 import java.io.IOException;
 import java.nio.charset.Charset;
@@ -56,14 +59,13 @@ import static android.widget.LinearLayout.HORIZONTAL;
 import static android.widget.Toast.LENGTH_LONG;
 import static java.util.logging.Level.INFO;
 import static java.util.logging.Level.WARNING;
-import static org.briarproject.bramble.util.LogUtils.logException;
 
 @MethodsNotNullByDefault
 @ParametersNotNullByDefault
-public class KeyAgreementFragment extends BaseEventFragment
-		implements QrCodeDecoder.ResultCallback, QrCodeView.FullscreenListener {
+public class ShowQrCodeFragment extends BaseEventFragment
+		implements QrCodeDecoder.ResultCallback {
 
-	static final String TAG = KeyAgreementFragment.class.getName();
+	static final String TAG = ShowQrCodeFragment.class.getName();
 
 	private static final Logger LOG = Logger.getLogger(TAG);
 	private static final Charset ISO_8859_1 = Charset.forName("ISO-8859-1");
@@ -81,29 +83,26 @@ public class KeyAgreementFragment extends BaseEventFragment
 	EventBus eventBus;
 
 	private CameraView cameraView;
-	private LinearLayout cameraOverlay;
 	private View statusView;
-	private QrCodeView qrCodeView;
 	private TextView status;
+	private ImageView qrCode;
+	private TextView mainProgressTitle;
+	private ViewGroup mainProgressContainer;
+	private boolean fullscreen = false;
 
 	private boolean gotRemotePayload;
 	private volatile boolean gotLocalPayload;
 	private KeyAgreementTask task;
-	private KeyAgreementEventListener listener;
 
-	public static KeyAgreementFragment newInstance() {
+	public static ShowQrCodeFragment newInstance() {
+
 		Bundle args = new Bundle();
-		KeyAgreementFragment fragment = new KeyAgreementFragment();
+
+		ShowQrCodeFragment fragment = new ShowQrCodeFragment();
 		fragment.setArguments(args);
 		return fragment;
 	}
 
-	@Override
-	public void onAttach(Context context) {
-		super.onAttach(context);
-		listener = (KeyAgreementEventListener) context;
-	}
-
 	@Override
 	public void injectFragment(ActivityComponent component) {
 		component.inject(this);
@@ -119,6 +118,7 @@ public class KeyAgreementFragment extends BaseEventFragment
 	public View onCreateView(LayoutInflater inflater,
 			@Nullable ViewGroup container,
 			@Nullable Bundle savedInstanceState) {
+
 		return inflater.inflate(R.layout.fragment_keyagreement_qr, container,
 				false);
 	}
@@ -126,17 +126,47 @@ public class KeyAgreementFragment extends BaseEventFragment
 	@Override
 	public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
 		super.onViewCreated(view, savedInstanceState);
+
 		cameraView = view.findViewById(R.id.camera_view);
-		cameraOverlay = view.findViewById(R.id.camera_overlay);
 		statusView = view.findViewById(R.id.status_container);
 		status = view.findViewById(R.id.connect_status);
-		qrCodeView = view.findViewById(R.id.qr_code_view);
-		qrCodeView.setFullscreenListener(this);
+		qrCode = view.findViewById(R.id.qr_code);
+		mainProgressTitle = view.findViewById(R.id.title_progress_bar);
+		mainProgressContainer = view.findViewById(R.id.container_progress);
+		ImageView fullscreenButton = view.findViewById(R.id.fullscreen_button);
+		fullscreenButton.setOnClickListener(v -> {
+			View qrCodeContainer = view.findViewById(R.id.qr_code_container);
+			LinearLayout cameraOverlay = view.findViewById(R.id.camera_overlay);
+			LayoutParams statusParams, qrCodeParams;
+			if (fullscreen) {
+				// Shrink the QR code container to fill half its parent
+				if (cameraOverlay.getOrientation() == HORIZONTAL) {
+					statusParams = new LayoutParams(0, MATCH_PARENT, 1f);
+					qrCodeParams = new LayoutParams(0, MATCH_PARENT, 1f);
+				} else {
+					statusParams = new LayoutParams(MATCH_PARENT, 0, 1f);
+					qrCodeParams = new LayoutParams(MATCH_PARENT, 0, 1f);
+				}
+				fullscreenButton.setImageResource(
+						R.drawable.ic_fullscreen_black_48dp);
+			} else {
+				// Grow the QR code container to fill its parent
+				statusParams = new LayoutParams(0, 0, 0f);
+				qrCodeParams = new LayoutParams(MATCH_PARENT, MATCH_PARENT, 1f);
+				fullscreenButton.setImageResource(
+						R.drawable.ic_fullscreen_exit_black_48dp);
+			}
+			statusView.setLayoutParams(statusParams);
+			qrCodeContainer.setLayoutParams(qrCodeParams);
+			cameraOverlay.invalidate();
+			fullscreen = !fullscreen;
+		});
 	}
 
 	@Override
 	public void onActivityCreated(@Nullable Bundle savedInstanceState) {
 		super.onActivityCreated(savedInstanceState);
+
 		getActivity().setRequestedOrientation(SCREEN_ORIENTATION_NOSENSOR);
 		cameraView.setPreviewConsumer(new QrCodeDecoder(this));
 	}
@@ -145,33 +175,30 @@ public class KeyAgreementFragment extends BaseEventFragment
 	public void onStart() {
 		super.onStart();
 		try {
-			cameraView.start();
+			cameraView.start(getScreenRotationDegrees());
 		} catch (CameraException e) {
 			logCameraExceptionAndFinish(e);
 		}
 		startListening();
 	}
 
-	@Override
-	public void setFullscreen(boolean fullscreen) {
-		LinearLayout.LayoutParams statusParams, qrCodeParams;
-		if (fullscreen) {
-			// Grow the QR code view to fill its parent
-			statusParams = new LayoutParams(0, 0, 0f);
-			qrCodeParams = new LayoutParams(MATCH_PARENT, MATCH_PARENT, 1f);
-		} else {
-			// Shrink the QR code view to fill half its parent
-			if (cameraOverlay.getOrientation() == HORIZONTAL) {
-				statusParams = new LayoutParams(0, MATCH_PARENT, 1f);
-				qrCodeParams = new LayoutParams(0, MATCH_PARENT, 1f);
-			} else {
-				statusParams = new LayoutParams(MATCH_PARENT, 0, 1f);
-				qrCodeParams = new LayoutParams(MATCH_PARENT, 0, 1f);
-			}
+	/**
+	 * See {@link Camera#setDisplayOrientation(int)}.
+	 */
+	private int getScreenRotationDegrees() {
+		Display d = getActivity().getWindowManager().getDefaultDisplay();
+		switch (d.getRotation()) {
+			case Surface.ROTATION_0:
+				return 0;
+			case Surface.ROTATION_90:
+				return 90;
+			case Surface.ROTATION_180:
+				return 180;
+			case Surface.ROTATION_270:
+				return 270;
+			default:
+				throw new AssertionError();
 		}
-		statusView.setLayoutParams(statusParams);
-		qrCodeView.setLayoutParams(qrCodeParams);
-		cameraOverlay.invalidate();
 	}
 
 	@Override
@@ -187,7 +214,7 @@ public class KeyAgreementFragment extends BaseEventFragment
 
 	@UiThread
 	private void logCameraExceptionAndFinish(CameraException e) {
-		logException(LOG, WARNING, e);
+		if (LOG.isLoggable(WARNING)) LOG.log(WARNING, e.toString(), e);
 		Toast.makeText(getActivity(), R.string.camera_error,
 				LENGTH_LONG).show();
 		finish();
@@ -217,7 +244,7 @@ public class KeyAgreementFragment extends BaseEventFragment
 		// If we've stopped the camera view, restart it
 		if (gotRemotePayload) {
 			try {
-				cameraView.start();
+				cameraView.start(getScreenRotationDegrees());
 			} catch (CameraException e) {
 				logCameraExceptionAndFinish(e);
 				return;
@@ -251,7 +278,7 @@ public class KeyAgreementFragment extends BaseEventFragment
 		} catch (CameraException e) {
 			logCameraExceptionAndFinish(e);
 		} catch (IOException | IllegalArgumentException e) {
-			LOG.log(WARNING, "QR Code Invalid", e);
+			if (LOG.isLoggable(WARNING)) LOG.log(WARNING, "QR Code Invalid", e);
 			reset();
 			Toast.makeText(getActivity(), R.string.qr_code_invalid,
 					LENGTH_LONG).show();
@@ -274,60 +301,82 @@ public class KeyAgreementFragment extends BaseEventFragment
 			KeyAgreementAbortedEvent event = (KeyAgreementAbortedEvent) e;
 			keyAgreementAborted(event.didRemoteAbort());
 		} else if (e instanceof KeyAgreementFinishedEvent) {
-			keyAgreementFinished(((KeyAgreementFinishedEvent) e).getResult());
+			runOnUiThreadUnlessDestroyed(() -> {
+				mainProgressContainer.setVisibility(VISIBLE);
+				mainProgressTitle.setText(R.string.exchanging_contact_details);
+			});
 		}
 	}
 
+	@UiThread
+	private void generateBitmapQR(Payload payload) {
+		// Get narrowest screen dimension
+		Context context = getContext();
+		if (context == null) return;
+		DisplayMetrics dm = context.getResources().getDisplayMetrics();
+		new AsyncTask<Void, Void, Bitmap>() {
+
+			@Override
+			@Nullable
+			protected Bitmap doInBackground(Void... params) {
+				byte[] payloadBytes = payloadEncoder.encode(payload);
+				if (LOG.isLoggable(INFO)) {
+					LOG.info("Local payload is " + payloadBytes.length
+							+ " bytes");
+				}
+				// Use ISO 8859-1 to encode bytes directly as a string
+				String content = new String(payloadBytes, ISO_8859_1);
+				return QrCodeUtils.createQrCode(dm, content);
+			}
+
+			@Override
+			protected void onPostExecute(@Nullable Bitmap bitmap) {
+				if (bitmap != null && !isDetached()) {
+					qrCode.setImageBitmap(bitmap);
+					// Simple fade-in animation
+					AlphaAnimation anim = new AlphaAnimation(0.0f, 1.0f);
+					anim.setDuration(200);
+					qrCode.startAnimation(anim);
+				}
+			}
+		}.execute();
+	}
+
+	private void setQrCode(Payload localPayload) {
+		runOnUiThreadUnlessDestroyed(() -> generateBitmapQR(localPayload));
+	}
+
 	private void keyAgreementFailed() {
 		runOnUiThreadUnlessDestroyed(() -> {
 			reset();
-			listener.keyAgreementFailed();
+			// TODO show failure somewhere persistent?
+			Toast.makeText(getActivity(), R.string.connection_failed,
+					LENGTH_LONG).show();
 		});
 	}
 
 	private void keyAgreementWaiting() {
 		runOnUiThreadUnlessDestroyed(
-				() -> status.setText(listener.keyAgreementWaiting()));
+				() -> status.setText(R.string.waiting_for_contact_to_scan));
 	}
 
 	private void keyAgreementStarted() {
 		runOnUiThreadUnlessDestroyed(() -> {
-			qrCodeView.setVisibility(INVISIBLE);
-			statusView.setVisibility(VISIBLE);
-			status.setText(listener.keyAgreementStarted());
+			mainProgressContainer.setVisibility(VISIBLE);
+			mainProgressTitle.setText(R.string.authenticating_with_device);
 		});
 	}
 
 	private void keyAgreementAborted(boolean remoteAborted) {
 		runOnUiThreadUnlessDestroyed(() -> {
 			reset();
-			qrCodeView.setVisibility(VISIBLE);
-			statusView.setVisibility(INVISIBLE);
-			status.setText(listener.keyAgreementAborted(remoteAborted));
-		});
-	}
-
-	private void keyAgreementFinished(KeyAgreementResult result) {
-		runOnUiThreadUnlessDestroyed(() -> {
-			statusView.setVisibility(VISIBLE);
-			status.setText(listener.keyAgreementFinished(result));
-		});
-	}
-
-	private void setQrCode(Payload localPayload) {
-		Context context = getContext();
-		if (context == null) return;
-		DisplayMetrics dm = context.getResources().getDisplayMetrics();
-		ioExecutor.execute(() -> {
-			byte[] payloadBytes = payloadEncoder.encode(localPayload);
-			if (LOG.isLoggable(INFO)) {
-				LOG.info("Local payload is " + payloadBytes.length
-						+ " bytes");
-			}
-			// Use ISO 8859-1 to encode bytes directly as a string
-			String content = new String(payloadBytes, ISO_8859_1);
-			Bitmap qrCode = QrCodeUtils.createQrCode(dm, content);
-			runOnUiThreadUnlessDestroyed(() -> qrCodeView.setQrCode(qrCode));
+			mainProgressContainer.setVisibility(INVISIBLE);
+			mainProgressTitle.setText("");
+			// TODO show abort somewhere persistent?
+			Toast.makeText(getActivity(),
+					remoteAborted ? R.string.connection_aborted_remote :
+							R.string.connection_aborted_local, LENGTH_LONG)
+					.show();
 		});
 	}
 
@@ -345,31 +394,4 @@ public class KeyAgreementFragment extends BaseEventFragment
 	protected void finish() {
 		getActivity().getSupportFragmentManager().popBackStack();
 	}
-
-	@NotNullByDefault
-	interface KeyAgreementEventListener {
-
-		@UiThread
-		void keyAgreementFailed();
-
-		// Should return a string to be displayed as status.
-		@UiThread
-		@Nullable
-		String keyAgreementWaiting();
-
-		// Should return a string to be displayed as status.
-		@UiThread
-		@Nullable
-		String keyAgreementStarted();
-
-		// Should return a string to be displayed as status.
-		@UiThread
-		@Nullable
-		String keyAgreementAborted(boolean remoteAborted);
-
-		// Should return a string to be displayed as status.
-		@UiThread
-		@Nullable
-		String keyAgreementFinished(KeyAgreementResult result);
-	}
 }

briar-android/src/main/java/org/briarproject/briar/android/logging/BriefLogFormatter.java

@@ -42,22 +42,6 @@ public class BriefLogFormatter extends Formatter {
 		tag = tag.substring(tag.lastIndexOf('.') + 1);
 		sb.append(tag).append(": ");
 		sb.append(record.getMessage());
-		Throwable t = record.getThrown();
-		if (t != null) {
-			sb.append('\n');
-			appendThrowable(sb, t);
-		}
 		return sb.toString();
 	}
-
-	private void appendThrowable(StringBuilder sb, Throwable t) {
-		sb.append(t);
-		for (StackTraceElement e : t.getStackTrace())
-			sb.append("\n        at ").append(e);
-		Throwable cause = t.getCause();
-		if (cause != null) {
-			sb.append("\n     Caused by: ");
-			appendThrowable(sb, cause);
-		}
-	}
 }