title: about opengles and texture on android
body: <p>As we know,in the <strong>OpenGL ES</strong>  the class <code>Renderer</code> on android has 3 <code>function:onDrawFrame, onSurfaceChanged, onSurfaceCreated.</code>
  and we can load the texture in the <strong>onSurfaceCreated</strong> and <strong>onDrawFrame</strong>.
  I want to know can i load the texture before the <strong>"Renderer"</strong>.Likely, I have a class named "Map",and can i load the images texture in the <strong>"Map"</strong> before the "GLSurfaceView" created. or can i load the images texture before the function <strong>"onSurfaceCreated"</strong> and <strong>"onDrawFrame"</strong>.</p>
  
  <p>if someone know it,please help me.</p>
  
  <p>Thanks!!</p>