How does an android application associate and input event with a view specifically speaking which class and which method?
How does an android application associate and input event with a view specifically speaking
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How does an android application associate and input event with a view specifically speaking which class and which method?
When the screen is touched, a MotionEvent is dispatched to the top most View (the content view of the Activity). The content view then does some calculations on area and determines if it has children that are able to receive the MotionEvent and passes the MotionEvent to the View that the MotionEvent falls into via a
onTouchEvent(MotionEvent). This is repeated down the View heirarchy until a view return true or the MotionEvent comes back to the top level View at which point it decides to either handle or discard it.Refer to :
View#onTouchEvent(MotionEvent)
ViewGroup#onInterceptTouchEvent(MotionEvent)