public synchronized void start()

in app/src/main/java/com/facebook/sample/SampleGLTFView.java [108:127]


        public synchronized void start() {
                super.start();

                handler = new Handler(getLooper()) {
                    @Override
                    public void handleMessage(Message msg) {
                        switch (msg.what) {
                            case MSG_SURFACE_AVAILABLE:
                                onSurfaceAvailable((SurfaceTexture)msg.obj, msg.arg1, msg.arg2);
                                break;
                            case MSG_VSYNC:
                                onVSync();
                                break;
                           case MSG_SURFACE_DESTROYED:
                               onSurfaceDestroyed();
                               break;
                        }
                    }
                };
        }