android 监听网络连接状态的改变

监听网络状态变化

最新推荐文章于 2017-12-26 14:01:25 发布

最新推荐文章于 2017-12-26 14:01:25 发布 · 65 阅读

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#移动开发

本文介绍了一个自定义BroadcastReceiver——MyReceiver，用于监听Android设备上的网络连接状态变化，并通过Toast显示当前移动网络、Wi-Fi及活动网络的状态。文章还提供了如何在AndroidManifest.xml中注册此接收器及所需权限。

BroadcastReceiver

public class MyReceiver extends BroadcastReceiver {
	@Override
	public void onReceive(Context context, Intent intent) {
		// TODO Auto-generated method stub
		//Toast.makeText(context, intent.getAction(), 1).show();
		ConnectivityManager manager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
		NetworkInfo mobileInfo = manager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);
		NetworkInfo wifiInfo = manager.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
		NetworkInfo activeInfo = manager.getActiveNetworkInfo();
		Toast.makeText(context, "mobile:"+mobileInfo.isConnected()+"\n"+"wifi:"+wifiInfo.isConnected()
				        +"\n"+"active:"+activeInfo.getTypeName(), 1).show();
	}  //如果无网络连接activeInfo为null

}

在清单文件中注册 BroadcastReceiver

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

要读取网络状态记得要加权限

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