[Android] 监听系统网络连接打开或者关闭的消息

很简单，所以直接看代码。

package xxx;import android.content.BroadcastReceiver;import android.content.Context;import android.content.Intent;import android.net.ConnectivityManager;import android.net.NetworkInfo;

public class NetstateReceiver extends BroadcastReceiver {@Overridepublic void onReceive(Context context, Intent intent) {ConnectivityManager manager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);NetworkInfo gprs = manager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);NetworkInfo wifi = manager.getNetworkInfo(ConnectivityManager.TYPE_WIFI);if (!gprs.isConnected() && !wifi.isConnected()) {// network closed} else {// network opend

}}}

代码自定义了一个BroadcastReceiver，是想监听网络设置变化的事件。

Manifest文件里注册监听。

        <receiver android:name="xxx.NetstateReceiver">            <intent-filter>                <action android:name="android.net.conn.CONNECTIVITY_CHANGE" />            </intent-filter>        </receiver>

还需要加入权限信息。

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