java - Identical fragments with different presenters -


i have activity 3 tabs: a, b & c. every tab, i’ve created fragment (-f) , presenter (-p). problem 3 fragments (a-f, b-f, c-f) same, presenters not. question how can avoid code duplicity? i’ve tried create basefragment , extend a-f, b-f, c-f, if i’m in a-f , happens c-f (like ui update), receive java.lang.nullpointerexception: attempt invoke virtual method 'void android.support.v7.widget.recyclerview.setvisibility(int)' on null object reference, because c-f @ destroyed (am right?) don't want create 3 same fragments same layouts.

i've done similar , i've found using views lot simpler , less buggy. android fragment managers can exhibit unpredictable behavior @ times when executing various transactions. here's quick sample of how can work:

youractivity extends activity {       view a,b,c;        @override       protected void oncreate(bundle savedinstancestate) {           = getlayoutinflater().inflate(r.layout.your_layout_id, null);           b = getlayoutinflater().inflate(r.layout.your_layout_id, null);           c = getlayoutinflater().inflate(r.layout.your_layout_id, null);       } }

the activity presenter / controller android, go ahead , have logic here instead of defining presenter class now. on each tab press control view show. don't see code in performing fragment transition cannot comment sure if fragment destroyed.


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