FPS Counters:

Sometimes it might be useful to include FPS (frames per second) counter in our game, especially for development purposes, to measure our performance etc. With AndEngine we won`t have to do much to obtain such values, mostly with no effort.

1. FPS Logger.

mEngine.registerUpdateHandler(new FPSLogger());

2. Text FPS Counter:

final FPSCounter fpsCounter = new FPSCounter();
this.mEngine.registerUpdateHandler(fpsCounter);
 
final Text fpsText = new Text(250, 240, this.mFont, "FPS:", "FPS: XXXXX".length(),vbo);
 
scene.attachChild(fpsText);
 
scene.registerUpdateHandler(new TimerHandler(1 / 20.0f, true, new ITimerCallback()
{
    @Override
    public void onTimePassed(final TimerHandler pTimerHandler)
    {
        fpsText.setText("FPS: " + fpsCounter.getFPS());
    }
}));

As you can see in the code above, we created new FPSCounter object (to receive frame-rate), new Text, attached it to the scene, and what is most important, registered new update handler, which is going to update this text constantly with updated fps  rate. With this simple and easy code, you will have on screen fps counter.