Is there a way to draw an overlay window always on top of any android application?
I am using Android x86 port and have system rights.
@Edit: The view below the overlay should receive all events.
It's possible to do that by creating a Service
that adds the view in the current WindowManager
:
public class OverlayService extends Service {
@Override
public void onCreate() {
super.onCreate();
WindowManager windowManager = (WindowManager) getSystemService(WINDOW_SERVICE);
View overlay = /* create your overlay here */;
WindowManager.LayoutParams params = new WindowManager.LayoutParams(
WindowManager.LayoutParams.WRAP_CONTENT,
WindowManager.LayoutParams.WRAP_CONTENT,
WindowManager.LayoutParams.TYPE_SYSTEM_ALERT,
WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE | WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE,
PixelFormat.TRANSLUCENT);
windowManager.addView(overlay , params);
}
@Override
public IBinder onBind(Intent intent) {
return null;
}
}
But you need this extra permission:
<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />
And then just register the service in the manifest:
<service android:name=".OverlayService" ></service>
and start it:
startService(new Intent(this, OverlayService.class));
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