一个片段里面FragmentTransaction

问题描述：

我使用jfeinstien10的 SlidingMenu 。在拔出菜单是一个片段。当用户点击菜单项，但它确实是这样的：

I am using jfeinstien10's SlidingMenu. The menu that pulls out is a Fragment. When the user clicks on a menu item, it does something like this:

FragmentTransaction t = getActivity().getSupportFragmentManager().beginTransaction();
SherlockListFragment mFrag = new ItemsFragment();
t.replace(R.id.main_frag, mFrag);
t.commit();

不过，我听说这是不好的做法来控制片段从另一个片段。在这样的情况下，这是一个可以接受的方法是什么？或者，我应该用一个回调方法父 FragmentActivity 。

However, I have heard that it is not good practice to control a Fragment from Another Fragment. In a situation like this, is this an acceptable method? Or should I be using a Callback Method to the parent FragmentActivity.

如果一个回调方法是适当的方式，我可以请参阅如何工作的例子吗？

If a Callback method is the proper way, can I please see an example of how this works?

答

相反的片段进行交易的，我建议你离开它的活动水平。要做到这一点，定义您的活动一个公共方法，然后从你的片段调用它。例如：

Instead of performing transaction in fragment, I would suggest you to leave it up to Activity level. To do that, define a public method in your activity and then call it from your fragment. For example:

假设你的活动是：

class MainActivity extends Activity{
    ....

    public void replaceFragment(){
        FragmentTransaction t = getSupportFragmentManager().beginTransaction();
        SherlockListFragment mFrag = new ItemsFragment();
        t.replace(R.id.main_frag, mFrag);
        t.commit();
    }

    ....
}

和您的片段中，进行下面的调用：

And within your fragment, make the following call:

((MainActivity)getActivity()).replaceFragment();

一个片段里面FragmentTransaction

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