接收器連接事件不起作用

Question

我要聽連接的變化和嘗試它，如下所示：

清單

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

<!-- ....... --> 

<receiver 
     android:name="<packagename>.ConnectionReceiver"> 
     <intent-filter> 
      <action android:name="ConnectivityManager.CONNECTIVITY_ACTION" /> 
     </intent-filter> 
</receiver> 

類

public class ConnectionReceiver extends BroadcastReceiver { 

private static final String TAG = "ConnectionReceiver"; 

@Override 
public void onReceive(Context context, Intent intent) { 

    Log.i(TAG, "Connection changed"); 

     } 
} 

不幸的是，它不似乎在我打開和關閉WiFi連接時被調用。

這裏有什麼問題，我錯過了什麼？

Answer 1

你可以嘗試這樣的事：

在AndroidManifest.xml後在 「清單」

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

在AndroidManifest.xml中下的 「應用程序」

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

接收器類：

public class ConnectionChangeReceiver extends BroadcastReceiver { 
    @Override 
    public void onReceive(Context context, Intent intent) { 
     ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE); 
     NetworkInfo activeNetInfo = connectivityManager.getActiveNetworkInfo(); 
     NetworkInfo mobNetInfo = connectivityManager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE); 
     if (activeNetInfo != null) { 
      Toast.makeText(context, "Active Network Type : " + activeNetInfo.getTypeName(), Toast.LENGTH_SHORT).show(); 
     } 
     if (mobNetInfo != null) { 
      Toast.makeText(context, "Mobile Network Type : " + mobNetInfo.getTypeName(), Toast.LENGTH_SHORT).show(); 
     } 
    } 
}