Summary
In this chapter, we saw how we can add thousands of self-contained entities to our real-time system. The entities were controlled by the ParticleSystem class, which in turn interacted with, and was controlled by, the game loop. As the game loop was running in a thread, we saw that the user can still interact seamlessly with the screen, and the operating system sends us the details of these interactions via the onTouchEvent method.
In the next chapter, our apps will finally get a bit noisier when we explore how to play sound effects; we'll also learn how to detect different versions of Android.
