GLSurfaceView display abnormal with many small cells after relaunching the Android Camera

Question

Using the GLSurfaceView to display camera preview data, i got the abnormal preview(as the following screenshot) if i do the following operations:

1. launch app and open camera
2. press the HOME key
3. re-launch app and open camera

Answer 1

Finally, i found the solution as following:

In the CameraGLRender, which implements GLSurfaceView.Renderer, do something in the onSurfaceChanged

@Override
public void onSurfaceChanged(GL10 gl, int width, int height) {
    gl.glMatrixMode(GL10.GL_PROJECTION);
    gl.glLoadIdentity();
    gl.glOrthof(0, width, 0, height, -10f, 10f);
    gl.glViewport(0, 0, width, height);
    // ...
}

It works fine.