android - Different View tree on different APIs -


i need views within activity , them in same way on phones , api versions. here how it:

private void walktroughviews(viewgroup group) {     (int i=0; i<group.getchildcount(); i++)     {         view view = group.getchildat(i);          if (something)         {             //do         }         if (view instanceof viewgroup)         {             viewgroup viewgroup = (viewgroup) view;             walktroughviews(viewgroup);         }     } }

but results different based on api level or phone model(not sure yet) seems on 4.2 there 1 linearlayout , on >4.0 there frame layout not on 4.1 or 4.1. why , how can activity layout identical on phones? trying start method in ongloballayoutlistener mactivity.getwindow().getdecorview().findviewbyid(r.id.content)

p.s. think might because of support-v4 library, why there spare linearlayout on 4.2?

libraries , native components of different apis can generate different layout. tab activity , action bar, progress bar , others. check viewtree using ui automator viewer, quite handy check this: http://developer.android.com/tools/debugging/debugging-ui.html , this: http://developer.android.com/tools/testing/testing_ui.html


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