Function declaration

Execution flow

1. Checks whether a sequence of input events is self-consistent.

2. Defensive cleanup for new gesture.

3. Filter the touch event to apply security policies.

4. Call mOnTouchListener.onTouch(event) if mOnTouchListener is not null

5. Call onTouchEvent(event) if the event was not intercepted

6. If the event still was not intercepted. Then, notifies the verifier that a given event was unhandled and the rest of the trace for the event should be ignored.

7. Clean up after nested scrolls if this is the end of a gesture. also cancel it if we tried an ACTION_DOWN but we didn't want the rest of the gesture.

Reference

【面试必备】最详细的 Android View 的事件分发原理 - 掘金

事件分发原理 序言 Android 的 View 的事件分发一直是老生常谈的问题，市面上的所有文章资料都在通过 dispatchTouchEvent、onInterceptTouchEvent 和 o

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