[Android]call to OpenGL ES API with no current context (logged once per thread)

Questions:
call to OpenGL ES API with no current context (logged once per thread)
for java you could not call the Opengl on main thread, you should build opengl running in subthread.
You can use  GLSurfaceView to do this by your own thread.

The wrong way:

public boolean onOptionsItemSelected(MenuItem item) {
    switch (item.getItemId()) {
        case R.id.clear:
            GLES20.glClear(GLES20.GL_COLOR_BUFFER_BIT);
            break;
        // ...
    }
}

The correct way:

public boolean onOptionsItemSelected(MenuItem item) {
    switch (item.getItemId()) {
        case R.id.clear:
            // GLSurfaceView.queueEvent
            surface.queueEvent(new Runnable() {
                @Override
                public void run() {
                    GLES20.glClear(GLES20.GL_COLOR_BUFFER_BIT);
                }
            });
            break;
        // ...
    }
}