Summary

Let’s conclude this chapter by quickly enumerating what you have learned about touch screens so far:

• MotionEvent as the foundation on which touch handling is done
• Different callbacks that handle touch events on a View object and through an OnTouchListener
• Different types of events that occur during a touch sequence
• How touch events travel through an entire view hierarchy, unless handled along the way
• Information that a MotionEvent object contains about touches, including for multiple fingers
• When to recycle a MotionEvent object and when not to
• Determining the speed at which a finger drags across a screen
• The wonderful world of multitouch, and the internal details of how it works
• Using the onTap() method with maps
• Implementing the pinch gesture, as well as other common gestures