java - Android: GridView resetting position in getView -

i'm populating gridview list of stages, 4. when calling getview(...) 0, 1 , 2 load fine, showing correct position number.

however, on position 3 number reset 0, giving me list: 0, 1, 2, 0.

public class examplegrid extends baseadapter{      private context mcontext;      public examplegrid(context c){         mcontext = c;     }      @override     public int getcount() {         return 20;     }      @override     public object getitem(int pos) {         return null;     }      @override     public long getitemid(int pos) {         return 0;     }      @override     public view getview(int position, view convertview, viewgroup parent) {          final button levelbutton;             if (convertview == null) {             string positiontext = position + "";             levelbutton = new button(mcontext);             levelbutton.settext(mcontext.getresources().getstring(r.string.mm_stage) + positiontext);             levelbutton.setlayoutparams(new gridview.layoutparams(viewgroup.layoutparams.wrap_content, viewgroup.layoutparams.wrap_content));         } else {             levelbutton = (button) convertview;         }          return levelbutton;     } } 

this prints 0, 1, 2, 0. if set getcount() method return larger value, pattern repeated. e.g.: 0, 1, 2, 0, 0, 1, 2, 0, 0, 1, 2, 0, ...

update: changed code more generic example. numbers loaded fine @ first scroll down list, lose order.

finally solved keeping reference buttons in baseadapter , using reference instead of checking convertview getview(...) method. note mbuttons:

public class examplegrid extends baseadapter{      private context mcontext;      private button[] mbuttons;      public examplegrid(context c){         mcontext = c;         mbuttons = new button[getcount()];     }      @override     public int getcount() {         return 20;     }      @override     public object getitem(int pos) {         return mbuttons[pos];     }      @override     public long getitemid(int pos) {         return 0;     }      @override     public view getview(int position, view convertview, viewgroup parent) {          final button levelbutton;             if (mbuttons[position] == null){              string positiontext = position + "";             levelbutton = new button(mcontext);             levelbutton.settext(mcontext.getresources().getstring(r.string.mm_stage) + positiontext);             levelbutton.setlayoutparams(new gridview.layoutparams(viewgroup.layoutparams.wrap_content, viewgroup.layoutparams.wrap_content));             mbuttons[position] = levelbutton;         } else {             levelbutton = mbuttons[position];         }          return levelbutton;     } }