title: Button can trigger onClick Event?
body: <p>I have a paino keyboard<img src="https://i.stack.imgur.com/Cxud3.png" alt="paino keyboard"></p>
  
  <p>Every key is a button.</p>
  
  <p>When I sliding from key1 to key2. the key1 first pressed, and then released. but the key2 can not get pressed.
  I have set View.OnTouchListener, when sliding from key1 to key2, only key1 get onTouchEvent, even my finger stay above key2.</p>
  
  <p>But if I move up my finger and move down to key2, key2 will trigger onTouchEvent and onClick Event.</p>
  
  <p>Now, I would like to trigger onClick event when finger stay above key2, no matter user first press key1 or key2.</p>