从片段内部调用Activity方法 | 从片段内部调用Activity方法

本文介绍了从片段内部调用Activity方法的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我正在尝试从片段"屏幕中激活一个方法.

I am trying to call a method in an activty from a Fragment screen.

我有一个名为myMethod()的方法，该方法位于名为MyActivity的活动中；我有一个名为Screen1Fragment的片段.

I have a method called myMethod() which is in an activity called MyActivity;I have a fragment called Screen1Fragment.

我想从Screen1Fragment内部调用MyActivity.myMethod()，但是我不确定该怎么做.

I would like to call MyActivity.myMethod() from inside the Screen1Fragment but I am not sure how to do this.

以前，Screen1Fragment是一项活动，因此我扩展了MyActivity，以便可以直接调用myMethod().但是我不得不将活动更改为片段以使用滑动标签.

Previously the Screen1Fragment was an activity and so I was extending MyActivity so that I could directly callmyMethod().But I have had to change the activity to a fragment for sliding tabs usage.

谢谢.

推荐答案

在片段中使用getActivity().

MyActivity activity = (MyActivity) getActivity();
activity.myMethod();

如果不确定您的片段是否已附加到MyActivity，则

if you are not sure if your fragment is attached to MyActivity then

 Activity activity = getActivity();
 if(activity instanceof MyActivity){
      MyActivity myactivity = (MyActivity) activity;
      myactivity.myMethod();
 }

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