带有传递解析对象的 popBackStack [英] popBackStack with Pass Parse Object

问题描述

我有一个活动A.Activity A 调用片段 frag1.frag1 调用片段 frag2.最后frag2 调用frag3.

I have an Activity A. Activity A calls fragment frag1. frag1 calls fragment frag2. Lastly frag2 calls frag3.

当我点击frag3中的一个按钮时，我想调用frag1，将一个对象从frag3传递并解析到片段1.我尝试使用从 frag3 发送到 frag1 的对象包来做到这一点.

When I click on a button in frag3, I want to call frag1, pass and parse an object from frag3 to frag1. I tried to do this with an object bundle sent from frag3 to frag1.

我看到有一个 popBackStack() 方法.但是，我对这将如何工作感到有些困惑.使用这种方法安全吗?

I see that there is a popBackStack() method. However, I am a little confused on how this would work. Is it safe to use this method?

我不知道该怎么做.提前致谢.

I do not know how to do it. Thanks in advance.

推荐答案

为此使用本地广播.

在片段 1 上写入广播接收器，

write Broadcast receiver on fragment 1,

在片段 3 的应用按钮上，广播你的数据，然后弹出片段 3

On apply button of fragment 3, broadcast your data , and then pop fragment 3

示例-

private final BroadcastReceiver myLocalBroadcastReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
           ;

            Bundle bundle = intent.getExtras();

            if (bundle != null) {

             get data from bundle



            }



    };

在片段 3(应用按钮)上:

on fragment 3(apply button):

      Intent localBroadcastIntent = new Intent(Constant.MY_ACTION);


        Bundle bundle = new Bundle();
        bundle.put("your data);

        localBroadcastIntent.putExtras(bundle);

        LocalBroadcastManager myLocalBroadcastManager =           LocalBroadcastManager.getInstance(getActivity());
        myLocalBroadcastManager.sendBroadcast(localBroadcastIntent);





        getActivity().getSupportFragmentManager().popBackStack();

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