[android-developers] Lazy loading in HorizontalScrollView to prevent Out of Memory issue

I want to add lazy loading feature to HorizontalScrollView, It has
linearlayout as a child and i am addding to linearlayout,

I am interested in listening to the event when the child view is out
of the visibility area, I see in linearlayout implementation it does
not call either dispatchViewVisibility or onDraw on child view , why i
want that because bitmap attached to the child view can be recycled
and create bitmap again when child view is visible (well that is a
separate part ,How can i create that bitmap very fast, I am planning
to use opengl for that) but the question is how can make such custom
view.

I can not use gallery view because it does not solve my purpose

I saw that viewgroup has feature of dispatchingViewVisibility and
dispatchOnDraw but not sure how to use that with
HorizontalScrollView.?

All i am doing to prevent Out of Memory issue

Any suggestion and help would be appreciated

thanks

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