fragment supporting in lollipop is not supporting lower versions of android -


i beginner in android studio working in project imported eclipse , have added new features in project use of android studio.now problem in fragment class fragment have used in project runs in lollipop version stopped while running in lower versions of android kitkat , jellybean.i completed checked codings there no wrong in beginner don't know how solve it.

this logcat of project

need friends thank in advance.

fragment class introduced since api level 11. after, have add support-v4 library (is jar).

when create mainfragment extends fragment, android studio can import check blog. fragent before api 11

see doc fragment doc, can see different package name


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