Transfer Process after Android Touch event occurs

The dispatchTouchEvent method of the currently top-level viewGroup starts to pass the user's touch screen behind the scenes.

Then the onInterceptTouchEvent method is triggered. Then the OnTouch event is triggered.

The process is as follows:

First, trigger the dispatchTouchEvent of the ACTIVITY.

Then, the onUserInteraction of the ACTIVITY is triggered.

Then, the dispatchTouchEvent of LAYOUT is triggered.

Then, the onInterceptTouchEvent of LAYOUT is triggered.

In Android, Gesture recognition (detector) is implemented through the GestureDetector. OnGestureListener interface. The input of this interface is the generated Touch event MotionEvent.

You can put the onTouchEvent of GestureDetector in the preceding methods based on your actual situation.