android - Why my ViewPager's Fragments are retained by FragmentActivity -


in fragmentactivity, have fragment(let's call hubfrag) has viewpager using fragmentstatepageradapter (which create fragments, let's call them 'itemfrag').

when replace hubfrag new fragment,hubfrag destroyed expected it's not case itemfrags objects. using eclipse mat see itemfrags objects retained fragmentmanagerimpl of fragmentactivity... why????

i explain why don't want them still in memory:

each itemfrag launch picture download , downloader (which has weakreference of itemfrag imageview)don't want process bitmap if weak reference null(to reduce memory use).

but downloader decode bitmap weak reference never null... thanks!

i found cause problem: populate hubfrag's viewpager using getsupportfragmentmanager, using getchildfragmentmanager resolved problem.


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