java - 接口(interface)列表器

我有一个界面MyListner

public interface MyListner{
    public void onOperationComplete();
}

我有两个实现MyListner的Activity SignIn和SignUp

public class SignIn extends Activity implements MyListner{
      @Override
      public void onOperationComplete(){
           Log.e("SignIn","Operation Complete");
      }
      @Override
      protected void onCreate(Bundle savedInstanceState) {
           super.onCreate(savedInstanceState);
           setContentView(R.layout.main);
           Operation.doOperation();
      }
}

public class SignUp extends Activity  implements MyListner{
      @Override
      public void onOperationComplete(){
           Log.e("SignUp","Operation Complete");
      }

      @Override
      protected void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          setContentView(R.layout.main);
          Operation.doOperation();

     }
 }

在两个Activity的onCreate（）内，我正在类Operation内调用静态函数doOperation（），以通过Operation.doOperation（）进行某些操作。

public class Operation{
    publis static void doOperation(){
       ...........
       ...........
       ...........
       //here i want a callback to interface funtion onOperationComplete()
   }
}

我的要求是我想在实现MyListner的所有类中获取对函数onOperationComplete（）的回调

最佳答案

使您的doOperation像这样：

public class Operation{
     publis static void doOperation(MyListener  callBack){
     ...........
      ...........
     ...........
     //here i want a callback to interface funtion onOperationComplete()
        callBack.onOperationComplete();
  }

}

在您的活动中：

public class SignIn extends Activity implements MyListner{
      @Override
      public void onOperationComplete(){
           Log.e("SignIn","Operation Complete");
      }
      @Override
      protected void onCreate(Bundle savedInstanceState) {
           super.onCreate(savedInstanceState);
           setContentView(R.layout.main);
           Operation.doOperation(this);
      }
}