android- How to search json data using retrofit and show the results? -

i made list view , showing json data on online. want add search functionality , show filter results.

this screenshot enter image description here

when type listview disappears , doesn't show results.

this code

mainactivityrecyc

public class mainactivityrecyc extends appcompatactivity { public listview listview; private view parentview; public arraylist<locations> locationslist; public dataadapter adapter;  // search edittext edittext inputsearch; @override protected void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     setcontentview(r.layout.activity_main_recyc);      locationslist= new arraylist<>();     parentview=findviewbyid(r.id.parentlayout);     inputsearch = (edittext) findviewbyid(r.id.inputsearch);     listview = (listview) findviewbyid(r.id.listview);     inputsearch.addtextchangedlistener(new textwatcher() {          @override         public void ontextchanged(charsequence cs, int arg1, int arg2, int arg3) {             // when user changed text             mainactivityrecyc.this.adapter.getfilter().filter(cs);         }          @override         public void beforetextchanged(charsequence arg0, int arg1, int arg2,                                       int arg3) {             // todo auto-generated method stub          }          @override         public void aftertextchanged(editable arg0) {             // todo auto-generated method stub         }     });  requestinterface api = jsonclient.getapiservice();      /**      * calling json      */     call<stoplist> call = api.getjson();      /**      * enqueue callback call when response...      */     call.enqueue(new callback<stoplist>() {         @override         public void onresponse(call<stoplist> call, response<stoplist> response) {             //dismiss dialog           //  dialog.dismiss();              if(response.issuccessful()) {                 /**                  * got                  */                 locationslist = response.body().getlocations();                  /**                  * binding list adapter                  */                 adapter = new dataadapter(mainactivityrecyc.this,                         locationslist);                 listview.setadapter(adapter);              } else {                 toast.maketext(getapplicationcontext(), "wrong", toast.length_short).show();             }         }          @override         public void onfailure(call<stoplist> call, throwable t) {             toast.maketext(getapplicationcontext(), "wrong", toast.length_short).show();         }     });  } 

requestinterface public interface requestinterface {

//@headers("content-type:application/json; charset=utf-8") @get("/bins/19frwr.json") call<stoplist> getjson(); }