android - 检查永久在线状态

Question

我使用以下代码检查电话是否有 Internet 连接：

online = SystemCheckInternetConn.getInstance(this).isOnline(this);

如何不断检查手机是否有连接？

Answer 1

您需要注册一个广播接收器来收听连接的变化。尝试这样的事情：

registerReceiver(MyNetworkStateReceiver, new IntentFilter(ConnectivityManager.CONNECTIVITY_ACTION));

private BroadcastReceiver NetworkStateReceiver = new BroadcastReceiver(){

        @Override
        public void onReceive(Context context, Intent intent) {
            boolean haveConnection = haveNetworkConnection(context);
        }

        private boolean haveNetworkConnection(Context context) {
            boolean haveConnectedWifi = false;
            boolean haveConnectedMobile = false;

            ConnectivityManager cm = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
            NetworkInfo[] netInfo = cm.getAllNetworkInfo();
            for (NetworkInfo ni : netInfo) {
                if (ni.getTypeName().equalsIgnoreCase("WIFI"))
                    if (ni.isConnected())
                        haveConnectedWifi = true;
                if (ni.getTypeName().equalsIgnoreCase("MOBILE"))
                    if (ni.isConnected())
                        haveConnectedMobile = true;
            }
            return haveConnectedWifi || haveConnectedMobile;
        }
    };

然后用这些新发现的知识做点什么:)