TheCompBoy
Android Enthusiast
This is a small snippet for the onTouchEvent and this is prettymuch how you handle touch events on your phone.. Try experiment with it 

Code:
public boolean onTouchEvent(MotionEvent e, MapView mv){
int i = e.getAction();
switch(i){
case MotionEvent.ACTION_DOWN:
//When your finger touches the screen
break;
case MotionEvent.ACTION_UP:
//When your finger stop touching the screen
break;
case MotionEvent.ACTION_MOVE:
//When your finger moves around the screen
break;
}
return false;
}