public void ItemClick(object sender, AdapterView.ItemClickEventArgs e) { Intent intent = new Intent(); // initialize the intent based on user click switch (e.Position) { case 0: AutoCompleteActivity autoActivity = new AutoCompleteActivity(); intent = new Intent(ApplicationContext, autoActivity.Class); break; case 1: ComboBoxActivity comActivity = new ComboBoxActivity(); intent = new Intent(ApplicationContext, comActivity.Class); break; case 2: DropDownActivity dropDownActivity = new DropDownActivity(); intent = new Intent(ApplicationContext, dropDownActivity.Class); break; case 3: MaskActivity maskActivity = new MaskActivity(); intent = new Intent(ApplicationContext, maskActivity.Class); break; } // start the new activity StartActivity(intent); }