Java 如何在触发类中对象的事件时对类调用方法

我有一个这样的代码，这只是一个示例类，带有一个事件侦听器的类的对象

public class MyActivity ..... {

     EditText something;
     AnyFragment frag;

     public MyActivity(){
          frag = new AnyFragment();
     }


     public void setText(String text){
          something.setText(text);
     }

}

public class AnyFragment extends DialogFragment implements AnyListener{

     public void onEvent(String text){
          // How to call method setText in class MyActivity from here ?
     }

}

我的问题是： 触发frag对象上的事件时，如何在MyActivity类中调用方法setText

还是有别的办法

任何答案都将不胜感激，谢谢

您可以这样做：

public class MyActivity ..... {

     EditText something;
     AnyFragment frag;

     public MyActivity(){
          frag = new AnyFragment(this);
     }

     public void setText(String text){
          something.setText(text);
     }
}

public class AnyFragment extends DialogFragment implements AnyListener{

     private Context context;

     public AnyFragment(Context context) {
         this.context = context;
     }

     public void onEvent(String text){
         ((MyActivity)context).setText(text);
     }
}

或使用

接口

：

public class MyActivity ..... {

     EditText something;
     AnyFragment frag;

     public MyActivity(){
         frag = new AnyFragment();
         frag.setFragListener(new AnyFragment.FragListener() {
             @Override
             public void notifyActivity(String text) {
                 setText(text);
             }
         });
     }

     public void setText(String text){
         something.setText(text);
     }
}

public class AnyFragment extends DialogFragment implements AnyListener{

    private FragListener listener;

    public setFragListener(FragListener listener) {
        this.listener = listener;
    }

    public void onEvent(String text){
        if(listener != null)
            listener.notifyActivity(text);
    }

    public interface FragListener {
        void notifyActivity(String text);
    }
}