Android cursoradapter filter listview -

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i'm trying filter listview cursoradapter. i've tried far: 

customadapter adapter; cursor cursor;  etsearch.addtextchangedlistener(new textwatcher (){          public void aftertextchanged(editable arg0) {             // todo auto-generated method stub          }          public void beforetextchanged(charsequence arg0, int arg1,                 int arg2, int arg3) {             // todo auto-generated method stub          }          public void ontextchanged(charsequence cs, int arg1, int arg2,                 int arg3) {             // todo auto-generated method stub              adapter.getfilter().filter(cs.tostring());          }      });  cursor = dbhelper.getalliteminventorylistings();      adapter = new customadapter(this, cursor);      lv.setadapter(adapter);     lv.settextfilterenabled(true);      adapter.setfilterqueryprovider(new filterqueryprovider() {          @override         public cursor runquery(charsequence constraint) {              string stritemcode = constraint.tostring();             return dbhelper.getalliteminventorylistings(stritemcode);          }     });

when tried not filter. seems wrong? appreciated. thank you.

try add adapter.notifydatasetchanged(); after adapter.getfilter().filter(cs.tostring());


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