java - Grid Item button not working -

i have gridview , adapter called myadapter. button in each grid not showing dialog box should (myadapter.java). here code, not sure missing here:

myadapter.java

public class myadapter extends baseadapter { context context; arraylist<players> playerlist; private static layoutinflater inflater = null; button btnrolereveal;  public myadapter(context context, arraylist<players> playerlist){     this.context = context;     this.playerlist = playerlist;     inflater = (layoutinflater) context.getsystemservice(context.layout_inflater_service); }   @override public int getcount() {     return playerlist.size(); }  @override public object getitem(int position) {     return position; }  @override public long getitemid(int position) {     return position; }  @override public view getview(int position, view convertview, viewgroup parent) {     if (convertview == null)         convertview = inflater.inflate(layout_grid_item, null);      final button button = (button) convertview.findviewbyid(r.id.btnrolereveal);     textview idtextview = (textview) convertview.findviewbyid(r.id.tv_player_id);     textview nametextview = (textview) convertview.findviewbyid(r.id.tv_player_name);     final textview roletextview = (textview) convertview.findviewbyid(r.id.tv_player_role);      button.setonclicklistener(new view.onclicklistener() {         @override         public void onclick(view v) {             new alertdialog.builder(context)                     .settitle("test")                     .setmessage("test");         }     });       players p = new players();     p = playerlist.get(position);     idtextview.settext("id: " + string.valueof(p.getid()));     nametextview.settext("name: " + string.valueof(p.getname()));     roletextview.settext("role: " + string.valueof(p.getrole()));      return convertview; }   } 

rolesfragment.java

public class rolesfragment extends fragment implements view.onclicklistener {  gridview gridview; arraylist<players> playerslist; myadapter adapter; button role;  public rolesfragment() {  }  @override public view oncreateview(layoutinflater inflater, viewgroup container,                          bundle savedinstancestate) {      view view = inflater.inflate(r.layout.fragment_viewroles, container, false);      gridview = (gridview) view.findviewbyid(r.id.gv_players);     role = (button) view.findviewbyid(r.id.btnrolereveal);      databasehelper databasehelper = new databasehelper(getactivity());     playerslist = new arraylist<players>();      playerslist = databasehelper.getplayers();     adapter = new myadapter(getactivity(), playerslist);     gridview.setadapter(adapter);     return view; }    @override public void onclick(view v) {  } } 

you're missing show() call on dialog:

new alertdialog.builder(context)                     .settitle("test")                     .setmessage("test")                     .show();