如何接口接收方法

Question

我已經建立了一個名爲NetworkStatus的類，用於監視設備的網絡狀態。在NetworkStatus內，我定義了一個BroadcastReceiver，用於監視是否存在連接變化，即，如果互聯網已被關閉關閉或關於。我想將此方法（即onReceive）「公開」給實例化NetworkStatus實例的活動。

我試圖通過在NetworkStatus類設立interface來實現這一點，但我不知道如何從BroadcastReceiver即的onReceive方法調用接口，

public class NetworkStatus { 
    public static interface NetworkStatusCallbacks { 
     void onReceive(); 
    } 

    public static class ConnectivityChange extends BroadcastReceiver { 

     public void onReceive(Context context, Intent intent) { 

      // need to call NetworkStatusCallbacks onReceive here 
     } 
    } 

} 

然後在主要活動我會做類似的，

public class MyActivity extends Activity implements NetworkStatus.NetworkStatusCallbacks { 

    @Override 
    public void onReceive() { 
     // Do stuff here 
    } 
} 

真的很感激一些指針。謝謝。

可能的解決方案

想我已經找到了解決辦法。正如Selvin指出的那樣，要做到這一點需要Activity。因此，我通過從被傳遞到用於NetworkStatus類，即一個構造的活動上下文澆鑄獲得的Activity，設置一個構造用於類作爲

private static nsc NetworkStatusCallbacks; 
public NetworkStatus (Context context) { 
    Activity activity = (Activity) context; 
    nsc = (NetworkStatusCallbacks) activity; 
} 

然後我可以調用從的onReceive方法的界面在BroadcastReceiver如下：

public void onReceive(Context context, Intent intent) { 
    nsc.onReceive(); 
} 

Answer 1

嘗試是這樣的：

public class NetworkStatus { 
     public static interface NetworkStatusCallbacks { 
      void onReceive(); 
     } 

     private final NetworkStatusCallbacks m_cb; 

     NetworkStatus(NetworkStatusCallbacks cb) 
     { 
      m_cb=cb; 
     } 

     public static class ConnectivityChange extends BroadcastReceiver { 

      public void onReceive(Context context, Intent intent) { 

       // need to call NetworkStatusCallbacks onReceive here 
       m_cb.onReceive() 
      } 
     } 

    }