onTouch에서 action_down 안됩니다..

Question

제목그대로 action down 은 아무반응이 없고 up만 반응이나옵니다

왜그럴까요..

 public boolean onTouch(View v, MotionEvent event){
     float startYPosition=1;
     float endYPosition=1;



     if(event.getAction() == MotionEvent.ACTION_DOWN){
         startYPosition = event.getRawY();
         Log.d("메시지","DOWN 들어옴");

     }
     else if(event.getAction() == MotionEvent.ACTION_UP){
         endYPosition = event.getRawY();
         Log.d("메시지","UP 들어옴");
     }

     return false;}

 

 

 

 

로그: 

D/메시지: UP 들어옴
D/ViewRootImpl: ViewPostImeInputStage processPointer 0
D/ViewRootImpl: ViewPostImeInputStage processPointer 1
D/메시지: UP 들어옴
D/ViewRootImpl: ViewPostImeInputStage processPointer 0
D/ViewRootImpl: ViewPostImeInputStage processPointer 1
D/메시지: UP 들어옴
D/ViewRootImpl: ViewPostImeInputStage processPointer 0
D/ViewRootImpl: ViewPostImeInputStage processPointer 1
D/메시지: UP 들어옴