Merge branch '1469-hide-ui-without-flashing' into 'master'

Hide UI without flashing

Closes #1469

See merge request briar/briar!1030

briar-android/src/main/AndroidManifest.xml

@@ -157,7 +157,7 @@
 				android:value="org.briarproject.briar.android.navdrawer.NavDrawerActivity"/>
 		</activity>
 
-			<activity
+		<activity
 			android:name="org.briarproject.briar.android.privategroup.memberlist.GroupMemberListActivity"
 			android:label="@string/groups_member_list"
 			android:parentActivityName="org.briarproject.briar.android.privategroup.conversation.GroupActivity"
@@ -400,7 +400,7 @@
 		<activity
 			android:name="org.briarproject.briar.android.panic.PanicResponderActivity"
 			android:noHistory="true"
-			android:theme="@style/Theme.AppCompat.NoActionBar">
+			android:theme="@style/TranslucentTheme">
 			<!-- this can never have launchMode singleTask or singleInstance! -->
 			<intent-filter>
 				<action android:name="info.guardianproject.panic.action.TRIGGER"/>
@@ -410,12 +410,12 @@
 
 		<activity
 			android:name="org.briarproject.briar.android.logout.ExitActivity"
-			android:theme="@style/Theme.AppCompat.NoActionBar">
+			android:theme="@android:style/Theme.NoDisplay">
 		</activity>
 
 		<activity
 			android:name=".android.logout.HideUiActivity"
-			android:theme="@style/Theme.AppCompat.NoActionBar">
+			android:theme="@android:style/Theme.NoDisplay">
 		</activity>
 
 		<activity

briar-android/src/main/java/org/briarproject/briar/android/logout/ExitActivity.java

@@ -1,14 +1,13 @@
 package org.briarproject.briar.android.logout;
 
-import android.os.Build;
+import android.app.Activity;
 import android.os.Bundle;
 
-import org.briarproject.briar.android.activity.ActivityComponent;
-import org.briarproject.briar.android.activity.BaseActivity;
-
 import java.util.logging.Logger;
 
-public class ExitActivity extends BaseActivity {
+import static android.os.Build.VERSION.SDK_INT;
+
+public class ExitActivity extends Activity {
 
 	private static final Logger LOG =
 			Logger.getLogger(ExitActivity.class.getName());
@@ -16,14 +15,9 @@ public class ExitActivity extends BaseActivity {
 	@Override
 	public void onCreate(Bundle state) {
 		super.onCreate(state);
-		if (Build.VERSION.SDK_INT >= 21) finishAndRemoveTask();
+		if (SDK_INT >= 21) finishAndRemoveTask();
 		else finish();
 		LOG.info("Exiting");
 		System.exit(0);
 	}
-
-	@Override
-	public void injectActivity(ActivityComponent component) {
-
-	}
 }

briar-android/src/main/java/org/briarproject/briar/android/logout/HideUiActivity.java

@@ -1,20 +1,13 @@
 package org.briarproject.briar.android.logout;
 
+import android.app.Activity;
 import android.os.Bundle;
 
-import org.briarproject.briar.android.activity.ActivityComponent;
+public class HideUiActivity extends Activity {
-import org.briarproject.briar.android.activity.BaseActivity;
-
-public class HideUiActivity extends BaseActivity {
 
 	@Override
 	public void onCreate(Bundle state) {
 		super.onCreate(state);
 		finish();
 	}
-
-	@Override
-	public void injectActivity(ActivityComponent component) {
-
-	}
 }

briar-android/src/main/java/org/briarproject/briar/android/panic/PanicResponderActivity.java

@@ -2,7 +2,6 @@ package org.briarproject.briar.android.panic;
 
 import android.content.Intent;
 import android.content.SharedPreferences;
-import android.os.Build;
 import android.os.Bundle;
 import android.support.v7.preference.PreferenceManager;
 
@@ -20,6 +19,7 @@ import info.guardianproject.panic.Panic;
 import info.guardianproject.panic.PanicResponder;
 import info.guardianproject.trustedintents.TrustedIntents;
 
+import static android.os.Build.VERSION.SDK_INT;
 import static org.briarproject.briar.android.panic.PanicPreferencesFragment.KEY_LOCK;
 import static org.briarproject.briar.android.panic.PanicPreferencesFragment.KEY_PURGE;
 
@@ -69,7 +69,7 @@ public class PanicResponderActivity extends BriarActivity {
 			}
 		}
 
-		if (Build.VERSION.SDK_INT >= 21) {
+		if (SDK_INT >= 21) {
 			finishAndRemoveTask();
 		} else {
 			finish();

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

@@ -66,4 +66,13 @@
 		<item name="buttonBarNeutralButtonStyle">@style/Widget.AppCompat.Button.Borderless</item>
 	</style>
 
+	<style name="TranslucentTheme" parent="Theme.AppCompat.NoActionBar">
+		<item name="android:colorBackgroundCacheHint">@null</item>
+		<item name="android:windowAnimationStyle">@android:style/Animation</item>
+		<item name="android:windowBackground">@android:color/transparent</item>
+		<item name="android:windowContentOverlay">@null</item>
+		<item name="android:windowIsTranslucent">true</item>
+		<item name="android:windowNoTitle">true</item>
+	</style>
+
 </resources>