The following is the code I am using to take a screen shot using GLSurfaceView. But I dont know why the onDraw() method in the GLSurfaceView.Renderer Class is not being called.

Please if some one can look at the code below and point out what am I doing wrong.`public class MainActivity extends Activity {

private GLSurfaceView mGLView;
int x,y,w,h;
Display disp;

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle icicle) {
    super.onCreate(icicle);
    // ToDo add your GUI initialization code here

    setContentView(R.layout.main);
    x=0;
    y=0;

    disp = getWindowManager().getDefaultDisplay();

    w = disp.getWidth();
    h = disp.getHeight();

   mGLView = new ClearGLSurfaceView(this);


}

class ClearGLSurfaceView extends GLSurfaceView {
public ClearGLSurfaceView(Context context) {
    super(context);
    setDebugFlags(DEBUG_CHECK_GL_ERROR | DEBUG_LOG_GL_CALLS);
    mRenderer = new ClearRenderer();
    setRenderer(mRenderer);
}

    ClearRenderer mRenderer;

}

class ClearRenderer implements GLSurfaceView.Renderer {

public void onSurfaceCreated(GL10 gl, EGLConfig config) {
    // Do nothing special.
}

public void onSurfaceChanged(GL10 gl, int w, int h) {
    //gl.glViewport(0, 0, w, h);
}

public void onDrawFrame(GL10 gl) {
    //gl.glClear(GL10.GL_COLOR_BUFFER_BIT | GL10.GL_DEPTH_BUFFER_BIT);
    int b[]=new int[w*(y+h)];

     int bt[]=new int[w*h];

     IntBuffer ib=IntBuffer.wrap(b);

     ib.position(0);

     gl.glReadPixels(x, 0, w, y+h, GL10.GL_RGBA, GL10.GL_UNSIGNED_BYTE, ib);



     for(int i=0, k=0; i<h; i++, k++)

     {//remember, that OpenGL bitmap is incompatible with Android bitmap

      //and so, some correction need.

          for(int j=0; j<w; j++)

          {

               int pix=b[i*w+j];

               int pb=(pix>>16)&0xff;

               int pr=(pix<<16)&0x00ff0000;

               int pix1=(pix&0xff00ff00) | pr | pb;

               bt[(h-k-1)*w+j]=pix1;

          }

     }




     Bitmap bmp = Bitmap.createBitmap(bt, w, h,Bitmap.Config.ARGB_8888);

     try

            {
                    File f = new File("/sdcard/testpicture.png");
                    f.createNewFile();
                    FileOutputStream fos=new FileOutputStream(f);

                    bmp.compress(CompressFormat.PNG, 100, fos);

                    try

                    {

                            fos.flush();

                    }

                    catch (IOException e)

                    {

                            // TODO Auto-generated catch block

                            e.printStackTrace();

                    }

                    try

                    {

                            fos.close();

                    }

                    catch (IOException e)

                    {

                            // TODO Auto-generated catch block

                            e.printStackTrace();

                    }



            }

            catch (FileNotFoundException e)

            {

                    // TODO Auto-generated catch block

                    e.printStackTrace();

            }
            catch(IOException e)
            {
                e.printStackTrace();
            }

}

}

}

`

Please someone help me out. I have just started learning to work on android.