Merge branch '2250-refuse-to-start-if-android4-expired' into 'master'

Refuse to start app on Android 4 beyond expiry date

Closes #2250

See merge request briar/briar!1578

briar-android/src/main/AndroidManifest.xml

@@ -99,6 +99,10 @@
 			android:name="org.briarproject.briar.android.splash.ExpiredActivity"
 			android:label="@string/app_name" />
 
+		<activity
+			android:name="org.briarproject.briar.android.splash.ExpiredOldAndroidActivity"
+			android:label="@string/app_name" />
+
 		<activity
 			android:name="org.briarproject.briar.android.login.StartupActivity"
 			android:label="@string/app_name" />

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

@@ -80,6 +80,7 @@ import org.briarproject.briar.android.sharing.ShareBlogFragment;
 import org.briarproject.briar.android.sharing.ShareForumActivity;
 import org.briarproject.briar.android.sharing.ShareForumFragment;
 import org.briarproject.briar.android.sharing.SharingModule;
+import org.briarproject.briar.android.splash.ExpiredOldAndroidActivity;
 import org.briarproject.briar.android.splash.SplashScreenActivity;
 import org.briarproject.briar.android.test.TestDataActivity;
 
@@ -182,6 +183,8 @@ public interface ActivityComponent {
 
 	void inject(RemovableDriveActivity activity);
 
+	void inject(ExpiredOldAndroidActivity activity);
+
 	// Fragments
 
 	void inject(SetupFragment fragment);

briar-android/src/main/java/org/briarproject/briar/android/splash/ExpiredOldAndroidActivity.java

@@ -0,0 +1,57 @@
+package org.briarproject.briar.android.splash;
+
+import android.content.Intent;
+import android.os.Bundle;
+
+import org.briarproject.bramble.api.nullsafety.MethodsNotNullByDefault;
+import org.briarproject.bramble.api.nullsafety.ParametersNotNullByDefault;
+import org.briarproject.bramble.api.system.AndroidWakeLockManager;
+import org.briarproject.briar.R;
+import org.briarproject.briar.android.activity.ActivityComponent;
+import org.briarproject.briar.android.activity.BaseActivity;
+import org.briarproject.briar.android.controller.BriarController;
+import org.briarproject.briar.android.logout.ExitActivity;
+
+import javax.annotation.Nullable;
+import javax.inject.Inject;
+
+import static android.content.Intent.FLAG_ACTIVITY_CLEAR_TASK;
+import static android.content.Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS;
+import static android.content.Intent.FLAG_ACTIVITY_NEW_TASK;
+import static android.content.Intent.FLAG_ACTIVITY_NO_ANIMATION;
+
+@MethodsNotNullByDefault
+@ParametersNotNullByDefault
+public class ExpiredOldAndroidActivity extends BaseActivity {
+
+	@Inject
+	BriarController briarController;
+	@Inject
+	AndroidWakeLockManager wakeLockManager;
+
+	@Override
+	public void onCreate(@Nullable Bundle state) {
+		super.onCreate(state);
+
+		setContentView(R.layout.activity_expired_old_android);
+		findViewById(R.id.delete_account_button).setOnClickListener(v -> {
+			// Hold a wake lock to ensure we exit before the device goes to sleep
+			wakeLockManager.runWakefully(() -> {
+				// we're not signed in, just go ahead and delete
+				briarController.deleteAccount();
+				// remove from recent apps
+				Intent i = new Intent(this, ExitActivity.class);
+				i.addFlags(FLAG_ACTIVITY_NEW_TASK
+						| FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS
+						| FLAG_ACTIVITY_NO_ANIMATION
+						| FLAG_ACTIVITY_CLEAR_TASK);
+				startActivity(i);
+			}, "DeleteAccount");
+		});
+	}
+
+	@Override
+	public void injectActivity(ActivityComponent component) {
+		component.inject(this);
+	}
+}

briar-android/src/main/java/org/briarproject/briar/android/splash/SplashScreenActivity.java

@@ -65,9 +65,14 @@ public class SplashScreenActivity extends BaseActivity {
 			int duration =
 					getResources().getInteger(R.integer.splashScreenDuration);
 			new Handler().postDelayed(() -> {
-				if (IS_DEBUG_BUILD && currentTimeMillis() >= EXPIRY_DATE) {
-					LOG.info("Expired");
-					startNextActivity(ExpiredActivity.class);
+				if (currentTimeMillis() >= EXPIRY_DATE) {
+					if (IS_DEBUG_BUILD) {
+						LOG.info("Expired: debug build");
+						startNextActivity(ExpiredActivity.class);
+					} else {
+						LOG.info("Expired: running on old Android");
+						startNextActivity(ExpiredOldAndroidActivity.class);
+					}
 				} else {
 					startNextActivity(ENTRY_ACTIVITY);
 				}

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

@@ -0,0 +1,45 @@
+<?xml version="1.0" encoding="utf-8"?>
+<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
+	android:layout_width="match_parent"
+	android:layout_height="match_parent"
+	android:orientation="vertical">
+
+	<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+		android:layout_width="match_parent"
+		android:layout_height="wrap_content"
+		android:layout_margin="@dimen/margin_large"
+		android:orientation="vertical">
+
+		<TextView
+			android:layout_width="match_parent"
+			android:layout_height="wrap_content"
+			android:layout_margin="@dimen/margin_medium"
+			android:gravity="center"
+			android:text="@string/old_android_expiry_date_reached"
+			android:textSize="@dimen/text_size_large" />
+
+		<TextView
+			android:layout_width="match_parent"
+			android:layout_height="wrap_content"
+			android:layout_margin="@dimen/margin_medium"
+			android:gravity="center"
+			android:text="@string/create_new_account"
+			android:textSize="@dimen/text_size_large" />
+
+		<TextView
+			android:layout_width="match_parent"
+			android:layout_height="wrap_content"
+			android:layout_margin="@dimen/margin_medium"
+			android:gravity="center"
+			android:text="@string/old_android_delete_account"
+			android:textSize="@dimen/text_size_large" />
+
+		<Button
+			android:id="@+id/delete_account_button"
+			style="@style/BriarButton"
+			android:layout_width="match_parent"
+			android:layout_height="wrap_content"
+			android:layout_margin="@dimen/margin_medium"
+			android:text="@string/delete_account_button" />
+	</LinearLayout>
+</ScrollView>

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

@@ -64,6 +64,9 @@
 	<string name="download_briar">To continue using Briar, please download the latest release.</string>
 	<string name="create_new_account">You will need to create a new account, but you can use the same nickname.</string>
 	<string name="download_briar_button">Download Latest Release</string>
+	<string name="old_android_expiry_date_reached">Briar no longer runs on Android 4.\nPlease install Briar on a newer device.</string>
+	<string name="old_android_delete_account">You can tap the button below to delete your account from this device.</string>
+	<string name="delete_account_button">Delete Account</string>
 	<string name="startup_open_database">Decrypting Database…</string>
 	<string name="startup_migrate_database">Upgrading Database…</string>
 	<string name="startup_compact_database">Compacting Database…</string>