title: How to show text on GLES20 android?
body: <p>recently my app is camera preview on GLSurfaceView.</p>
  
  <p>I use <code>GLES20</code> 
   want show text on GLSurfaceView.</p>
  
  <p>before I have a idea. 
  create TextView, </p>
  
  <p><code>tv.setText("ddd");</code></p>
  
  <p><code>tv.bringToFront();</code>
  but this not on GLSurfaceView.</p>
  
  <p>How to draw Text on GLSurfaceView <code>GLES20</code>? </p>