FloatingViewService.java

public class FloatingViewService extends Service {


   private WindowManager mWindowManager;
   private View mFloatingView;


   public FloatingViewService() {
   }


   @Override
   public IBinder onBind(Intent intent) {
       return null;
   }


   @Override
   public void onCreate() {
       super.onCreate();
       //Inflate the floating view layout we created
       mFloatingView = LayoutInflater.from(this).inflate(R.layout.layout_floating_widget, null);


       //Add the view to the window.
       final WindowManager.LayoutParams params = new WindowManager.LayoutParams(
               WindowManager.LayoutParams.WRAP_CONTENT,
               WindowManager.LayoutParams.WRAP_CONTENT,
               WindowManager.LayoutParams.TYPE_PHONE,
               WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE,
               PixelFormat.TRANSLUCENT);


       //Specify the view position
       params.gravity = Gravity.TOP | Gravity.LEFT;        //Initially view will be added to top-left corner
       params.x = 0;
       params.y = 100;


       //Add the view to the window
       mWindowManager = (WindowManager) getSystemService(WINDOW_SERVICE);
       mWindowManager.addView(mFloatingView, params);


//….
//….
   }


   @Override
   public void onDestroy() {
       super.onDestroy();
       if (mFloatingView != null) mWindowManager.removeView(mFloatingView);
   }
}