Android Programming for Beginners

Handling touches

In our Pong game, we will have no UI buttons, and therefore cannot use the OnCLickListener interface and override the onClick method. This is not a problem, however. We will just use another interface to suit our situation. We will use OnTouchListener and override the onTouchEvent method. It works a little bit differently, so let's take a look before we dive into the game code.

We must implement the OnTouchListener interface for the activity we want to listen for touches in, like this:

public class MainActivity extends Activity implements View.OnTouchListener{

Then, we can override the onTouchEvent method, perhaps a bit like this:

@Override public boolean onTouchEvent(MotionEvent motionEvent) { float x = motionEvent.getX(); float ...