EditText点击事件：弹出单选框

EditText claszId =(EditText)view.findViewById(R.id.claszId);

claszId.setInputType(InputType.TYPE_NULL);
claszId.setOnClickListener(new OnClickListener() {
   @Override
   public void onClick(View arg0) {
      AlertDialog.Builder builder=new AlertDialog.Builder(getActivity());
      builder.setTitle("选择班群");
      final String[] cities = {"15", "87", "82"};
      builder.setItems(cities, new DialogInterface.OnClickListener()
      {
         @Override
         public void onClick(DialogInterface dialog, int which)
         {
            claszId.setText(cities[which]);
         }
      });
      builder.show();
   }
});

效果图：