@Override
	protected void changePresenceReceive(User user) {
		if (user == null)
			return;
		if (ContacterManager.contacters.get(user.getJID()) == null)
			return;
		if (!user.isAvailable())
			if (ContacterManager.contacters.get(user.getJID()).isAvailable())
				Toast.makeText(this,
						(user.getName() == null) ? user.getJID() : user
								.getName() + "上线了", Toast.LENGTH_SHORT).show();
		if (user.isAvailable())
			if (!ContacterManager.contacters.get(user.getJID()).isAvailable())
				Toast.makeText(this,
						(user.getName() == null) ? user.getJID() : user
								.getName() + "下线了", Toast.LENGTH_SHORT).show();
		refreshList();
	}
	@Override
	protected void deleteUserReceive(User user) {
		if (user == null)
			return;
		Toast.makeText(this,
				(user.getName() == null) ? user.getJID() : user.getName()
						+ "被删除了", Toast.LENGTH_SHORT).show();
		refreshList();
	}
		@Override
		public void onCreateContextMenu(ContextMenu menu, View v,
				ContextMenuInfo menuInfo) {
			switch (v.getId()) {
			case R.id.main_expand_list:

				ExpandableListView.ExpandableListContextMenuInfo info = (ExpandableListView.ExpandableListContextMenuInfo) menuInfo;

				int type = ExpandableListView
						.getPackedPositionType(info.packedPosition);

				if (type == ExpandableListView.PACKED_POSITION_TYPE_GROUP) {
					int gId = ExpandableListView
							.getPackedPositionGroup(info.packedPosition);
					String[] longClickItems = null;
					final String groupName = rGroups.get(gId).getName();
					if (StringUtil.notEmpty(groupName)
							&& !Constant.ALL_FRIEND.equals(groupName)
							&& !Constant.NO_GROUP_FRIEND.equals(groupName)) {
						longClickItems = new String[] { "添加分组", "更改组名", };
					} else {
						longClickItems = new String[] { "添加分组" };

					}
					new AlertDialog.Builder(ContacterMainActivity.this)
							.setItems(longClickItems,
									new DialogInterface.OnClickListener() {
										@Override
										public void onClick(
												DialogInterface dialog,
												int which) {
											switch (which) {
											case 0:
												addNewGroup();
												break;

											case 1:
												updateGroupNameA(groupName);
												break;
											}
										}
									}).setTitle("选项").show();
				} else if (type == ExpandableListView.PACKED_POSITION_TYPE_CHILD) {

					String[] longClickItems = null;
					View vx = info.targetView;
					clickUser = (User) vx.findViewById(R.id.username).getTag();
					showToast(clickUser.getJID() + "---");

					if (StringUtil.notEmpty(clickUser.getGroupName())
							&& !Constant.ALL_FRIEND.equals(clickUser
									.getGroupName())
							&& !Constant.NO_GROUP_FRIEND.equals(clickUser
									.getGroupName())) {
						longClickItems = new String[] { "设置昵称", "添加好友", "删除好友",
								"移动到分组", "退出该组" };
					} else {
						longClickItems = new String[] { "设置昵称", "添加好友", "删除好友",
								"移动到分组" };
					}
					new AlertDialog.Builder(ContacterMainActivity.this)
							.setItems(longClickItems,
									new DialogInterface.OnClickListener() {
										@Override
										public void onClick(
												DialogInterface dialog,
												int which) {
											switch (which) {
											case 0:
												setNickname(clickUser);
												break;
											case 1:
												addSubscriber();
												break;
											case 2:
												showDeleteDialog(clickUser);
												break;
											case 3:
												removeUserFromGroupUI(clickUser);

												removeUserFromGroup(clickUser,
														clickUser.getGroupName());
												addToGroup(clickUser);

												break;

											case 4:
												removeUserFromGroupUI(clickUser);
												removeUserFromGroup(clickUser,
														clickUser.getGroupName());
												break;
											}
										}
									}).setTitle("选项").show();
				}
				break;
			case R.id.main_chat_room_list:

				String[] longClickItems = new String[] { "创建房间", "删除房间",
						"邀请好友", "房间改名" };

				new AlertDialog.Builder(ContacterMainActivity.this)
						.setItems(longClickItems,
								new DialogInterface.OnClickListener() {
									@Override
									public void onClick(DialogInterface dialog,
											int which) {
										switch (which) {
										case 0:
											addChatRoom();
											break;

										case 1:
											break;

										case 2:
											break;

										case 3:
											break;
										}
									}
								}).setTitle("选项").show();

				break;
			default:
				break;
			}

		}