Why it is not possible to create a class that extends OnTouchListener

Question

Android SDK has an interface in TouchEvent. (android.view.View.OnTouchListener) I don't know why the following line fails. (and Eclipse notices error at OnTouchListener)

public class TouchHandler extends OnTouchListener{

And it works if change to:

public interface TouchHandler extends OnTouchListener{

It means that I cannot create a class that extends OnTouchListener. Can somebody explain why?

thanks :)

Answer 1

Instead of

public class TouchHandler extends OnTouchListener{

use implements

public class TouchHandler implements OnTouchListener{