How can I detect tap on the screen?

Question

More specific where do I attach OnGestureListener so that
I can detect onSingleTapUp everywhere on the screen,
even if an ImageView

Answer 1

Detect Screen Tap

I'm answering this for those who just need a simple way to detect a tap on the screen:

1. Add an android:onClick value to your base/root layout (LinearLayout, RelativeLayout, etc.). You can call it anything you want, I'm naming it screenTapped as an example:

   <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
       xmlns:tools="http://schemas.android.com/tools" 
       android:layout_width="match_parent"
       android:layout_height="match_parent"
       android:onClick="screenTapped">
   

2. Add this method to your Activity using the same name you specified for onClick:

   public void screenTapped(View view) {
       // Your code here
   }
   

Now, tapping on the screen will call the method above.

Answer 2

I'm answering my own question. Thanks to the above @Jason. I have registered onTouchEvent to all views.
It works great.