Broadcast动态注册监听网络变化代码,Java代码库,德仔网

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【Java】 Broadcast动态注册监听网络变化

作者:晚睡综合症 / 发布于2015/6/10/ 541


	package top.oldtime.broadcastdemo;
	
	import android.app.Activity;
	import android.content.BroadcastReceiver;
	import android.content.Context;
	import android.content.Intent;
	import android.content.IntentFilter;
	import android.net.ConnectivityManager;
	import android.net.NetworkInfo;
	import android.os.Bundle;
	import android.util.Log;
	import android.widget.Toast;
	
	//通过Broadcast动态注册监听网络变化
	//在Androidmanifest中加入<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
	//程序执行时不要用Back键，用Home键返回桌面
	public class MainActivity extends Activity {
	 private final static String TAG = "MainActivity";
	 private IntentFilter intentFilter;
	 private NetworkChangeReceive networkChangeReceive;
	
	 @Override
	 protected void onCreate(Bundle savedInstanceState) {
	 super.onCreate(savedInstanceState);
	 setContentView(R.layout.activity_main);
	 intentFilter = new IntentFilter();
	 //addAction
	 intentFilter.addAction("android.net.conn.CONNECTIVITY_CHANGE");
	 Log.e(TAG, "Done1");
	 networkChangeReceive = new NetworkChangeReceive();
	 registerReceiver(networkChangeReceive, intentFilter);
	 }
	
	 @Override
	 protected void onDestroy() {
	 super.onDestroy();
	 Log.e(TAG, "程序退出");
	 unregisterReceiver(networkChangeReceive);
	 }
	
	 class NetworkChangeReceive extends BroadcastReceiver {
	
	 @Override
	 public void onReceive(Context context, Intent intent) {
	 ConnectivityManager connectivityManager = (ConnectivityManager)
	 getSystemService(Context.CONNECTIVITY_SERVICE);
	 NetworkInfo networkInfo = connectivityManager.getActiveNetworkInfo();
	 if (networkInfo != null && networkInfo.isAvailable()) {
	 Toast.makeText(MainActivity.this, "net is available", Toast.LENGTH_SHORT).show();
	 } else {
	 Toast.makeText(MainActivity.this, "net is not available", Toast.LENGTH_SHORT).show();
	 }
	 }
	 }
	}

试试其它关键字

　Broadcast　　监听　　网络变化　

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