/**
     * 发送消息
     */
    private void sendMsg(String msg) {

        IMSendMsgBean sendMsgBean = new IMSendMsgBean();
        sendMsgBean.setMsgContent(msg);
        sendMsgBean.setSendTime(TimeUntils.getNowMills());
        sendMsgBean.setFromUserId(mFromUserId);
        sendMsgBean.setFromUserName(mFromUserName);
        sendMsgBean.setFromUserHeadUrl(mFromUserHeadUrl);
        sendMsgBean.setToUserId(mToUserId);
        sendMsgBean.setToUserName(mToUserName);
        sendMsgBean.setToUserHeadUrl(mToUserHeadUrl);
        sendMsgBean.setMsgTag(sendMsgBean.getSendTime()+"-"+random());

        upMsgTime = sendMsgBean.getSendTime();

        new LocalDataSender.SendCommonDataAsync(new Gson().toJson(sendMsgBean), getToUserId()) {
            @Override
            protected void onPostExecute(Integer code) {
                if (code == 0) {
                    mEtEditMsg.setText("");
                    sendMsgBean.setMsgOwnAccount(mFromUserId);
                    sendMsgBean.setMsgOtherAccount(mToUserId);
                    sendMsgBean.setIsRead(true);//已读
                    sendMsgBean.saveAsync().listen(new SaveCallback() {
                        @Override
                        public void onFinish(boolean success) {
				mAdapter.addData(newMsg);

       				 //如果当前屏幕最下边的item是最后五个，则滑动到底部，否则不滑动
       				 if (mLayoutManager.findLastVisibleItemPosition() >= (mAdapter.getItemCount() - 5)) {
         				rvScrollTobottom();//滑动到底部
      				 }
                        }
                    });
                } else {
                    Logger.d("数据发送失败。错误码是：" + code + "！");
                }
            }
        }.execute();

    }