code: public void onServerStart(String ip) {
          closeDialog();
          mBtnStart.setVisibility(View.GONE);
          mBtnStop.setVisibility(View.VISIBLE);
          mBtnBrowser.setVisibility(View.VISIBLE);
  
          if (!TextUtils.isEmpty(ip)) {
              List<String> addressList = new LinkedList<>();
              mRootUrl = "http://" + ip + ":8080/";
              addressList.add(mRootUrl);
              addressList.add("http://" + ip + ":8080/login.html");
              mTvMessage.setText(TextUtils.join("\n", addressList));
          } else {
              mRootUrl = null;
              mTvMessage.setText(R.string.server_ip_error);
          }
      }
docs: Start notify.