将数据从当前片段传回上一个片段

问题描述

我在我的应用程序中使用导航抽屉.我有一个MainActivity，其余的都是Fragments.所以问题是，假设我有三个片段，例如A，B，C.

I am Using Navigation Drawer in my app. I have one MainActivity and rest of are Fragments. So the issue is Suppose i have three fragments like A,B,C.

现在在A中，我有一个按钮，并且我正在从A> B发送数据.
例如putSring("datafrom A"，"datafrom A");
现在在B中，我从A接收数据.
B中有一个按钮，我正在从B> C发送数据.
例如putSring("datafrom B"，"datafrom B");
现在在C中，我从B接收数据.
然后，我在C中有一个按钮，并从C> B发送数据.
例如putSring("datafrom C"，"datafrom C");

Now in A i have one button and i am sending data from A>B.
For example putSring("datafrom A","datafrom A");
Now in B i receive data From A.
I have one button in B,and i am sending data from B>C.
For example putSring("datafrom B","datafrom B");
Now in C i receive data From B.
Then, I have one Button in C,and sending data from C>B.
For example putSring("datafrom C","datafrom C");

因此，似乎就像在B中一样，我从两个不同的片段中获取数据.我尝试了所有使用活动，并且它与startActivityforresult一起很好地工作.但是当所有都是碎片时，我该如何管理?

So,seems like in B i am getting data from two different fragments. I tried with all using activity and it work well with startActivityforresult. but how can i manager when all are fragments.

推荐答案

当您将数据从Fragment A发送到Fragment B时，请使用相同的布尔值，如下所示:-

When u are sending the data from Fragment A to Fragment B use the same boolean like below:-

FragmentA-> FragmentB

FragmentB ldf = new FragmentB ();
Bundle args = new Bundle();
args.putBoolean("BOOLEAN_VALUE",true);
ldf.setArguments(args);

getFragmentManager().beginTransaction().add(R.id.container, ldf).commit();

当您将数据从片段C发送到片段B时，请使用与片段A到B中相同的BOOLEAN，如下所示-

And when u are send data from Fragment C to Fragment B use the same BOOLEAN which is used in Fragment A to B like below-

FragmentC-> FragmentB

FragmentB ldf = new FragmentB ();
    Bundle args = new Bundle();
    args.putBoolean("BOOLEAN_VALUE",false);
    ldf.setArguments(args);

    getFragmentManager().beginTransaction().add(R.id.container, ldf).commit();

最后，我们必须检查FragmentB中的值是否是从Fragment A或FragemntC之类的地方获取的

And in the last we have to check that value is recevied in FragmentB is from where like Fragment A OR FragemntC

FragmentB

   Boolean getValue= getArguments().getBoolean("BOOLEAN_VALUE");
   if(getValue)
   {
    //VALUE RECEIVED FROM FRAGMENT A
   }
   else
   {
   //VALUE RECEIVED FROM FRAGMENT C
   }

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