title: How to force a call to onDrawFrame() on a GLSurfaceView?
body: <p>I have a UI that haes a GLSurfaceView that shows a polygon.</p>
  
  <p>The UI haves also two buttons ZoomIn and ZoomOut. When the user press these buttons, the zoomIn() and zoomOut() methods of myGLSurfaceView are called.</p>
  
  <p>The problem is that i want that the method onDrawFrame get's called to get reflected the zoom in &amp; out.</p>
  
  <p>Why i want this? because the buttons have setClickable(true); why? because i need that if the user leaves the finger presing the button, the zoom get's applied continuosly until the user releases the buton.</p>
  
  <p>Now it works but it works bad, i need to refresh the GLsurfaceview forcing onDrawFrame</p>