Android监听网络变化

注册方式:

<receiver            android:name="包名.ConnectionChangeReceiver"            android:label="NetworkConnection" >            <intent-filter>                <action android:name="android.net.conn.CONNECTIVITY_CHANGE" />            </intent-filter></receiver>

/* * 手动注册网络状态变化，或在清单文件配置。 */private void registerNetStateReceiver() {Log.i("--bxm register netstate receiver...");mConnectivityReceiver = new ConnectionChangeReceiver();IntentFilter filter = new IntentFilter();filter.addAction(android.net.ConnectivityManager.CONNECTIVITY_ACTION);registerReceiver(mConnectivityReceiver, filter);}

其中ConnectionChangeReceiver类为：

public class ConnectionChangeReceiver extends BroadcastReceiver {private final static NetConnectionStateMgr dataStateMgr = NetConnectionStateMgr.getInstance();@Overridepublic void onReceive(Context context, Intent intent) {Log.i("--ConnectivityReceiver.onReceive()...");String action = intent.getAction();Log.i("--action=" + action);ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);NetworkInfo networkInfo = connectivityManager.getActiveNetworkInfo();if (networkInfo != null) {Log.i("--Network Type  = " + networkInfo.getTypeName());Log.i("--Network State = " + networkInfo.getState());if (networkInfo.isConnected()) {Log.i("--bxm Network connected");dataStateMgr.setDataState(NetConnectionStateMgr.DATA_CONNECTIONED);}} else {Log.e("--bxm Network unavailable");dataStateMgr.setDataState(NetConnectionStateMgr.DATA_CONNECTION_UNAVAILABLE);}dataStateMgr.notifyDataSetChanged();}}

上面的NetConnectionStateMgr是自己实现的观察者类，方便用而已。

注意权限配置：

<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

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