java - Filter a ListView with custom adapter and custom row in a fragment -

i have listview custom adapter in fragment. works fine i'm trying implement way filtering list when typing in edittext (i've tried searchview did not work either). each row has 2 edittexts , imageview.

in oncreateview:

lst=(listview)rootview.findviewbyid(r.id.lst); lst.settextfilterenabled(true); mainad = new marrayadapter(getactivity(),r.layout.row,downlist); //it's more complicated listview populated correctly lst.setadapter(mainad); lst.settextfilterenabled(true); edit = (edittext) rootview.findviewbyid(r.id.txtexample); edit.addtextchangedlistener(new textwatcher() {     @override         public void beforetextchanged(charsequence charsequence, int i, int i1, int i2) {          }          @override         public void ontextchanged(charsequence charsequence, int i, int i1, int i2) {             mainad.getfilter().filter(charsequence.tostring());         }          @override         public void aftertextchanged(editable editable) {          } }); return rootview; 

the marrayadapter:

private class marrayadapter extends arrayadapter<exhibition> implements filterable{      context context;     int layoutresourceid;     arraylist<exhibition> list;     valuefilter valuefilter;     arraylist<exhibition> filterlist;      marrayadapter(context context, int layoutresourceid, arraylist<exhibition>  data){         super(context, layoutresourceid, data);         this.context=context;         this.layoutresourceid=layoutresourceid;         this.list=data;         this.filterlist =data;     }      @override     @nonnull     public view getview(int position, view convertview, @nonnull viewgroup parent) {         view row;         exhibition ex;         if(convertview==null){             row= getactivity().getlayoutinflater().inflate(r.layout.row,parent,false);         }         else row = convertview;         textview ttl = (textview)row.findviewbyid(r.id.title);         textview descr = (textview)row.findviewbyid(r.id.descr);         imageview header = (imageview)row.findviewbyid(r.id.hd);          ex = downlist.get(position);          ttl.settext(ex.name);         descr.settext(ex.description);          byte[] decoded = base64.decode(ex.image,base64.default);         bitmap decodedbitmap = bitmapfactory.decodebytearray(decoded,0,decoded.length);         header.setimagebitmap(decodedbitmap);         return row;      }      @override     public filter getfilter() {         if (valuefilter == null) {             valuefilter = new valuefilter();         }         return valuefilter;     }      private class valuefilter extends filter {         @override         protected filterresults performfiltering(charsequence constraint) {              string filtstring = constraint.tostring().tolowercase();             filterresults results = new filterresults();             if(constraint == null || constraint.length() == 0){                 results.values = filterlist;                 results.count = filterlist.size();             }             else {                  list<exhibition> nexhlist = new arraylist<>();                  for(exhibition e : list){                     if (e.getname().tolowercase().startswith(constraint.tostring().tolowercase())){                         nexhlist.add(e);                     }                 }                  results.values= nexhlist;                 results.count=nexhlist.size();              }             return results;          }          @override         protected void publishresults(charsequence constraint,                                       filterresults results) {             if(results.count==0){                 notifydatasetinvalidated();             }             else{                 list = (arraylist<exhibition>)results.values;                 notifydatasetchanged();             }         }      }  } 

i don't know why it's not working. in advance.

i solved problem.

i add changes did make works but, if have same problem, note @ this link there example made filter correctly listview edittext , searchview.

for first, in edit.addtextchangedlistener:

edit.addtextchangedlistener(new textwatcher() {         @override         public void beforetextchanged(charsequence charsequence, int i, int i1, int i2) {          }          @override         public void ontextchanged(charsequence charsequence, int i, int i1, int i2) {             if (i2 < i1) {                 mainad.resetdata();  //if delete characters show original list             }             mainad.getfilter().filter(charsequence.tostring());         }          @override         public void aftertextchanged(editable editable) {          }     }); 

for second, in marrayadapter checked right variables (for example, calling original arraylist in getview()) , add 3 methods needed:

@override public int getcount(){     return list.size(); }  @override public exhibition getitem (int pos){     return list.get(pos); }  void resetdata() {     list = originallist; } 

(i changed name of filterlist in originallist)

the valuefilter following:

private class valuefilter extends filter {         @override         protected filterresults performfiltering(charsequence constraint) {             filterresults results = new filterresults();             if(constraint == null || constraint.length() == 0){                 results.values = originallist;                 results.count = originallist.size();             }             else {                  list<exhibition> nexhlist = new arraylist<>();                  for(exhibition e : list){                     if (e.getname().touppercase().startswith(constraint.tostring().touppercase())){                         nexhlist.add(e);                     }                 }                  results.values= nexhlist;                 results.count=nexhlist.size();             }             return results;         }          @override         protected void publishresults(charsequence constraint,                                       filterresults results) {             if(results.count==0){                 notifydatasetinvalidated();             }             else{                 list = (arraylist<exhibition>)results.values;                 notifydatasetchanged();             }         }      }