android - Copy text from EditText to ListView -

i want know how text edittext, using button, , place in listview. have tried code:

public class mainactivity extends activity {     button send;     edittext textbox;      @override     protected void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         setcontentview(r.layout.activity_main);          send = (button) findviewbyid(r.id.sendbtn);         textbox = (edittext) findviewbyid(r.id.textbox);          edittext text = (edittext) findviewbyid(r.id.textbox);         string textbox = text.gettext().tostring();          string arr[] = {};          lv = (listview) findviewbyid(r.id.list);          arrayadapter<string> adapter = new arrayadapter<string>(getapplicationcontext(),                                                                 r.layout.activity_main, arr);          lv.setadapter(adapter);         textbox.setonclicklistener(new onclicklistener() {             public void onclick(view arg0) {}         });     }      @override     public boolean oncreateoptionsmenu(menu menu) {         // inflate menu; adds items action bar if present.         getmenuinflater().inflate(r.menu.main, menu);         return true;     } } 

first, set onclicklistener button. in listener, grab text edittext via textbox.gettext().tostring(). next want update the listview's list adapter newly selected text. there number of ways this

• update adapter , notify listview of change
• rebuilt array of strings , set adapter listview again