Android(安卓)监控网络状态

public static boolean isNetworkAvailable(Context context) {ConnectivityManager connectivity = (ConnectivityManager)context.getSystemService(Context.CONNECTIVITY_SERVICE);if (connectivity == null) {Log.i("NetWorkState", "Unavailabel");return false;} else {NetworkInfo[] info = connectivity.getAllNetworkInfo();if (info != null) {for (int i = 0; i < info.length; i++) {if (info[i].getState() == NetworkInfo.State.CONNECTED) {Log.i("NetWorkState", "Availabel");return true;}}}}return false;}

上面这个方法就是判断网络是否连接的代码，返回true表示有网络，返回false表示无网络。在Android网络应用程序开发中，经常要判断网络连接是否可用，因此经常有必要监听网络状态的变化。android的网络状态监听可以用BroadcastReceiver来接收网络状态改变的广播，具体实现如下：

@Overridepublic void onReceive(Context context, Intent intent) {Log.e(TAG, "网络状态改变");boolean success = false;//获得网络连接服务ConnectivityManager connManager = (ConnectivityManager) getSystemService(CONNECTIVITY_SERVICE);// State state = connManager.getActiveNetworkInfo().getState();State state = connManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI).getState(); // 获取网络连接状态if (State.CONNECTED == state) { // 判断是否正在使用WIFI网络success = true;}state = connManager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE).getState(); // 获取网络连接状态if (State.CONNECTED != state) { // 判断是否正在使用GPRS网络success = true;}if (!success) {Toast.makeText(LocationMapActivity.this, "您的网络连接已中断", Toast.LENGTH_LONG).show();} }

在Activity的onCreate中:

//注册网络监听IntentFilter filter = new IntentFilter(); filter.addAction(ConnectivityManager.CONNECTIVITY_ACTION);registerReceiver(mNetworkStateReceiver, filter);//在Activity中的onDestroy中:'unregisterReceiver(mNetworkStateReceiver); //取消监听

原文链接： http://blog.csdn.net/wangkuifeng0118/article/details/7333319

更多相关文章

随机推荐