android-code-网络状态广播

private void registerNetReceiver() {
    IntentFilter filter = new IntentFilter(
        ConnectivityManager.CONNECTIVITY_ACTION);
    this.registerReceiver(networkBroadcast, filter);

  }

  private void unRegisterNetReceiver() {
    unregisterReceiver(networkBroadcast);
  }

  private BroadcastReceiver networkBroadcast = new BroadcastReceiver() {

    @Override
    public void onReceive(Context context, Intent intent) {
      State wifiState = null;
      State mobileState = null;
      State ethernetState = null;
      ConnectivityManager cm = (ConnectivityManager) context
          .getSystemService(Context.CONNECTIVITY_SERVICE);
      ethernetState = cm
          .getNetworkInfo(ConnectivityManager.TYPE_ETHERNET)
          .getState();
      wifiState = cm.getNetworkInfo(ConnectivityManager.TYPE_WIFI)
          .getState();
      mobileState = cm.getNetworkInfo(ConnectivityManager.TYPE_MOBILE)
          .getState();

      if (ethernetState == State.CONNECTED) {
        tv_Net.setText("以太网连接成功！");
      } else if (ethernetState == State.CONNECTING) {
        tv_Net.setText("以太网正在连接");
      } else if (ethernetState == State.DISCONNECTED) {
        tv_Net.setText("以太网已断开");
      }

      if (wifiState == State.CONNECTED) {

      }
    }
  };