android - Retrieving data from Firebase and populate them in listview -

dbref.addvalueeventlistener(new valueeventlistener() {         @override         public void ondatachange(final datasnapshot datasnapshot) {              (final datasnapshot ds : datasnapshot.getchildren()){                 arr.add(ds.child("name").getvalue().tostring()+"--"+ds.child("id").getvalue().tostring()); //ds.child("id").getvalue().tostring() how id database                 lv.setonitemclicklistener(new adapterview.onitemclicklistener() {                     @override                     public void onitemclick(adapterview<?> parent, view view, int position, long id) {                         toast.maketext(getapplication(),"id :"+ds.getkey(),toast.length_short).show();                     }                 });             }             lv.setadapter(arrayadapter);         }         @override         public void oncancelled(databaseerror databaseerror) {          }     }); 

this how data firebase , post them in listview. onitemclick want show id of user (from database) in toast.

try not create adapter's click listener within firebase methods.

lv.setadapter(arrayadapter); lv.setonitemclicklistener(new adapterview.onitemclicklistener() {     @override     public void onitemclick(adapterview<?> parent, view view, int position, long id) {         string clicked = arrayadapter.getitem(position).tostring();         toast.maketext(mainactivity.this,             "id :" + clicked,             toast.length_short).show();     } });   dbref.addvalueeventlistener(new valueeventlistener() {     @override     public void ondatachange(final datasnapshot datasnapshot) {         arrayadapter.clear();         (datasnapshot ds : datasnapshot.getchildren()){             arrayadapter.add(ds.child("name").getvalue().tostring()+"--"+ds.child("id").getvalue().tostring());         }     }     @override     public void oncancelled(databaseerror databaseerror) {      } }); 

i want show id of user (from database) in toast

then can use

string clicked = arrayadapter.getitem(position).tostring(); string[] parts = clicked.split("--"); // because added "--" on other string.  toast.maketext(mainactivity.this,     "id :" + parts[1],     toast.length_short).show(); 

it simpler if mapped firebase values java objects