@Override
 public void removeMember(User user) {
   service.removeMember(memberGroup, user, null);
   mMembers.remove(user);
   deleteMemberList.remove(user);
   user.isShowDelete = false;
   adapter.notifyDataSetChanged();
 }
 @Override
 protected void onDestroy() {
   deleteMemberList.clear();
   mMembers.clear();
   if (activityType == GROUP_MEMBER_TYPE_CROWD) {
     this.unregisterReceiver(localReceiver);
   }
   service.clearCalledBack();
   super.onDestroy();
 }