@Override
  public boolean onContextItemSelected(MenuItem item) {
    boolean handled = false;
    boolean deleteMessage = false;
    if (item.getItemId() == R.id.delete_message) {
      deleteMessage = true;
      handled = true;
    } else if (item.getItemId() == R.id.delete_conversation) {
      deleteMessage = false;
      handled = true;
    }
    if (listView.getHeaderViewsCount() >= 1) {
      EMConversation tobeDeleteCons =
          adapter.getItem(((AdapterContextMenuInfo) item.getMenuInfo()).position - 1);
      // 删除此会话
      EMChatManager.getInstance()
          .deleteConversation(
              tobeDeleteCons.getUserName(), tobeDeleteCons.isGroup(), deleteMessage);
      InviteMessgeDao inviteMessgeDao = new InviteMessgeDao(getActivity());
      inviteMessgeDao.deleteMessage(tobeDeleteCons.getUserName());
      adapter.remove(tobeDeleteCons);
      adapter.notifyDataSetChanged();
    } else {
      EMConversation tobeDeleteCons =
          adapter.getItem(((AdapterContextMenuInfo) item.getMenuInfo()).position);
      // 删除此会话
      EMChatManager.getInstance()
          .deleteConversation(
              tobeDeleteCons.getUserName(), tobeDeleteCons.isGroup(), deleteMessage);
      InviteMessgeDao inviteMessgeDao = new InviteMessgeDao(getActivity());
      inviteMessgeDao.deleteMessage(tobeDeleteCons.getUserName());
      adapter.remove(tobeDeleteCons);
      adapter.notifyDataSetChanged();
    }

    // 更新消息未读数
    //		((MainActivity) getActivity()).updateUnreadLabel();

    return handled ? true : super.onContextItemSelected(item);
  }
 /** 刷新页面 */
 public void refresh() {
   conversationList.clear();
   conversationList.addAll(loadConversationsWithRecentChat());
   if (adapter != null) adapter.notifyDataSetChanged();
 }