Android 监听网络连接状态的改变

Android 监听网络连接状态的改变

Android 监听网络连接状态的改变：

BroadcastReceiver

1. public class MyReceiver extends BroadcastReceiver {  
2.     @Override  
3.     public void onReceive(Context context, Intent intent) {  
4.         // TODO Auto-generated method stub   
5.         //Toast.makeText(context, intent.getAction(), 1).show();   
6.         ConnectivityManager manager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);  
7.         NetworkInfo mobileInfo = manager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);  
8.         NetworkInfo wifiInfo = manager.getNetworkInfo(ConnectivityManager.TYPE_WIFI);  
9.         NetworkInfo activeInfo = manager.getActiveNetworkInfo();  
10.         Toast.makeText(context, "mobile:"+mobileInfo.isConnected()+"\n"+"wifi:"+wifiInfo.isConnected()  
11.                         +"\n"+"active:"+activeInfo.getTypeName(), 1).show();  
12.     }  //如果无网络连接activeInfo为null   
13.   
14. }  

在清单文件中注册 BroadcastReceiver

1.     <receiver android:name=".MyReceiver">  
2.             <intent-filter>  
3.                 <action android:name="android.net.conn.CONNECTIVITY_CHANGE"/>  
4.             </intent-filter>  
5.         </receiver>  

要读取网络状态记得要加权限

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