判断当前Wifi或Ethernet连接状态:

 

  public static boolean isNetworkConnected(Context context) {
    ConnectivityManager cm = (ConnectivityManager) context
        .getSystemService(Context.CONNECTIVITY_SERVICE);
    NetworkInfo info = cm.getActiveNetworkInfo();
    if (info != null) {
      int type = info.getType();
      if (type == ConnectivityManager.TYPE_WIFI || 
        type == ConnectivityManager.TYPE_ETHERNET) {
        return info.isAvailable();
      }     
    } 
    
    return false;
  }


BroadcastReceiver中监测Wifi或Ethernet连接状态:

 

 

    if (ConnectivityManager.CONNECTIVITY_ACTION.equals(action)) {
      Bundle extras = intent.getExtras();
      if (extras != null) {
                NetworkInfo networkInfo =
                        (NetworkInfo)extras.get(ConnectivityManager.EXTRA_NETWORK_INFO);
                if (networkInfo == null) return;
                
                State state = networkInfo.getState();
                int networkType = networkInfo.getType();
              if (networkType == ConnectivityManager.TYPE_WIFI || 
                  networkType == ConnectivityManager.TYPE_ETHERNET) {
                  if (state == State.CONNECTED) {
                    mListener.onNetworkStateChange(true);
                    
                  } else if (state == State.DISCONNECTED) {
                    mListener.onNetworkStateChange(false);
                    
                  }
              }
                    
      }

    }