sdk - Android Code does not work / 2 questions -


hello can tell me why code give me error , crash app? happens when 'reset((view) child);' added @ end want when click button onclick:reset, apply kind of reset images , textviews inside linearlayout has more types of childrens

 public void reset(view v) {      linearlayout items = (linearlayout) findviewbyid(r.id.itemstosearch);      (int = 0; < items.getchildcount(); i++)     {         object child = items.getchildat(i);          context context = getapplicationcontext();         charsequence text = child.tostring();         int duration = toast.length_short;         toast toast = toast.maketext(context, text, duration);         toast.show();          if (child instanceof imageview)         {             ((imageview) child).setvisibility(view.invisible);          }         else if (child instanceof textview)         {             ((textview) child).settextcolor(color.parsecolor("#98868a"));         }         else if(child instanceof viewgroup)         {             reset((view) child);         }     } }

and other question app works fragmentpageradapter, how can example if click button in frag#1 change text inside frag#3 not shown?, me crash, see because frag#3 or whatever other frag off screen not yet loaded on screen , because of doesnt fint specified id

thank you

your reset method broken. not using view passed argument method, searching same linearlayout. code should this:

public void reset(viewgroup viewgroup) {     final int childcount = viewgroup.getchildcount();     (int = 0; < childcount; i++) {         view child = viewgroup.getchildat(i);         if (child instanceof imageview) {             ((imageview) child).setvisibility(view.invisible);         } else if (child instanceof textview) {             ((textview) child).settextcolor(color.parsecolor("#98868a"));         } else if(child instanceof viewgroup) {             // recursive call             reset((viewgroup) child);         }     } }

regarding other issue, current fragment , ones either side (within offscreen page limit, default 1) loaded , in state can manipulate views. need store data somewhere , refer data when page want (fragment #3 in example) instantiated , start loading data it.


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