[android-developers] ViewPager MotionEvent changes between onInterceptTouchEvent and onTouchEvent

Setup:

I am using a custom ViewGroup withing ViewPager(horizontal scroll) . custom viewgroup provides vertical scrolling and has implemented OnGestureListener with the help of GestureDetector.

I am using android.support.v4.view (revision 6) with android 4.03

+ViewPager (horizontal scrolling)

   + CustomView (vertical scrolling)

      - TextView

      - TextView

   + CustomView

      - TextView

      - TextView

Problem:

Sometime when I am scrolling horizontally ViewPager fails to move to the next Page(my custom viewgroup)

What I found to be the reason is that whenever it fails to move I get a different event in onTouchEvent of ViewPager than the one intercepted in onInterceptTouchEvent of ViewPager. ACTION_MOVE(in  onInterceptTouchEvent  ) is sent back as ACTION_UP(in onTouchEvent ) and hence no scrolling happens. I am not able to understand how and why ACTION_MOVE is getting changed to ACTION_UP. Could it be something to do with what I do in my custom ViewGroup?

thanks

harvinder

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