android: tile/control activity - no bind leaks, no callbacks after destroy

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/frontends/android/app/src/main/java/org/strongswan/android/ui/VpnProfileControlActivity.java

@@ -79,6 +79,7 @@ public class VpnProfileControlActivity extends AppCompatActivity implements VpnD
 	private Bundle mProfileInfo;
 	private boolean mWaitingForResult;
 	private VpnStateService mService;
+	private boolean mBound;
 	/* profile lookups are SQLite queries and must not block the main thread */
 	private final ExecutorService mProfileExecutor = Executors.newSingleThreadExecutor();
 	private final ServiceConnection mServiceConnection = new ServiceConnection()
@@ -140,8 +141,8 @@ public class VpnProfileControlActivity extends AppCompatActivity implements VpnD
 		{
 			mWaitingForResult = savedInstanceState.getBoolean(WAITING_FOR_RESULT, false);
 		}
-		this.bindService(new Intent(this, VpnStateService.class),
+		mBound = this.bindService(new Intent(this, VpnStateService.class),
-						 mServiceConnection, Service.BIND_AUTO_CREATE);
+								  mServiceConnection, Service.BIND_AUTO_CREATE);
 		VpnDialogBus.INSTANCE.setListener(this);
 		VpnDialogsKt.installVpnDialogHost(this);
 	}
@@ -159,10 +160,12 @@ public class VpnProfileControlActivity extends AppCompatActivity implements VpnD
 		super.onDestroy();
 		VpnDialogBus.INSTANCE.setListener(null);
 		mProfileExecutor.shutdown();
-		if (mService != null)
+		if (mBound)
 		{
 			this.unbindService(mServiceConnection);
+			mBound = false;
 		}
+		mService = null;
 	}
 
 	/**
@@ -429,6 +432,10 @@ public class VpnProfileControlActivity extends AppCompatActivity implements VpnD
 		mProfileExecutor.execute(() -> {
 			VpnProfile profile = loadProfile(uuid);
 			runOnUiThread(() -> {
+				if (isFinishing() || isDestroyed())
+				{	/* rotated or finished while the query ran */
+					return;
+				}
 				if (profile != null)
 				{
 					startVpnProfile(profile);
@@ -479,7 +486,12 @@ public class VpnProfileControlActivity extends AppCompatActivity implements VpnD
 		final Intent startIntent = intent;
 		mProfileExecutor.execute(() -> {
 			VpnProfile profile = loadProfile(uuid);
-			runOnUiThread(() -> handleDisconnect(startIntent, profile));
+			runOnUiThread(() -> {
+				if (!isFinishing() && !isDestroyed())
+				{
+					handleDisconnect(startIntent, profile);
+				}
+			});
 		});
 	}
 

src/frontends/android/app/src/main/java/org/strongswan/android/ui/VpnTileService.java

@@ -45,6 +45,7 @@ public class VpnTileService extends TileService implements VpnStateService.VpnSt
 	private boolean mListening;
 	private VpnProfileDataSource mDataSource;
 	private VpnStateService mService;
+	private boolean mBound;
 	private final ServiceConnection mServiceConnection = new ServiceConnection()
 	{
 		@Override
@@ -71,8 +72,8 @@ public class VpnTileService extends TileService implements VpnStateService.VpnSt
 		super.onCreate();
 
 		Context context = getApplicationContext();
-		context.bindService(new Intent(context, VpnStateService.class),
+		mBound = context.bindService(new Intent(context, VpnStateService.class),
-							mServiceConnection, Service.BIND_AUTO_CREATE);
+									 mServiceConnection, Service.BIND_AUTO_CREATE);
 
 		mDataSource = new VpnProfileSource(this);
 		mDataSource.open();
@@ -83,10 +84,14 @@ public class VpnTileService extends TileService implements VpnStateService.VpnSt
 	{
 		super.onDestroy();
 
-		if (mService != null)
+		/* the binding lives on the application context: unbind even if the
+		 * service never connected, or it leaks for the life of the process */
+		if (mBound)
 		{
 			getApplicationContext().unbindService(mServiceConnection);
+			mBound = false;
 		}
+		mService = null;
 		mDataSource.close();
 		mDataSource = null;
 	}