片段标签主机片段之间的通信 [英] communication between fragments of fragment tab host

问题描述

我实现使用V4支持库FragmentTabHost标签。

I am implementing tabs using FragmentTabHost of v4 support library.

我的第一个选项卡包含我的列表项单击它应该移动到标签2 items.When名单。
我的第二个选项卡显示列表的描述item.So我需要通过第一个选项卡的列表和列表项的索引点击第二个选项卡。

My first tab contains the list of items.When I click on list item it should move to tab 2. My second tab shows the description of the list item.So I need to pass the list of the first tab and the index of list item clicked to the second tab.

我目前使用的getter和setter方法​​在应用程序级。但是，有没有其他办法这样做呢？什么是做到这一点的最好方法是什么？

I am currently using getters and setters at application level. But is there any other way to do so? What is the best way to do this?

第一个片段 - 制表0

First fragment-Tab-0

@Override
public void onAttach(Activity activity) {
    // TODO Auto-generated method stub
    super.onAttach(activity);

    try {
        mCallback = (OnRadioSelectedListener) activity;
    } catch (ClassCastException e) {
        throw new ClassCastException(activity.toString()
                + " must implement OnHeadlineSelectedListener");
    }
}

@Override
public void onListItemClick(ListView l, View v, int position, long id) {
    // TODO Auto-generated method stub
    super.onListItemClick(l, v, position, id);          
        mCallback.onRadioSelected(dataList, position);
}



public interface OnRadioSelectedListener {
    public void onRadioSelected(ArrayList<DataModel> playingList, int   playingIndex);
}

Tabhost活动code：

Tabhost activity code:

@Override
    public void onRadioSelected(ArrayList<DataModel> playingList, int playingIndex) {
        mPlayingIndex = playingIndex;
        mPlayingList = playingList;

       fragmentTabHost.setCurrentTab(1);
        Fragment2 frag = (Fragment2) getSupportFragmentManager().findFragmentByTag(getString(R.string.str));
    if (frag != null) {
        Bundle args = new Bundle();
        args.putSerializable("Key_list", mPlayingList);
        args.putInt("Key_current_index", mPlayingIndex);
        frag.setArguments(args);
    }


}

第一次的frag为null，并且第二次它给人的例外

first time frag is null and second time it gives the exception

推荐答案

我知道这个问题是有点老了，但如果有人仍想知道一个简单的方法来做到这一点，在这里，我走了。所以，问题是发送两个片段之间的数据正确，所以基本上你有什么开始是创建一个返回的活动一个字符串的函数。类似

I know this question is a little old but if anyone is still interested in knowing an easy way to do this ,here i go. So the problem is sending data between two fragments right , so basically what you have to start with is create a function which returns a string in your Activity. Something like

String TabFragmentB;
public void setTabFragmentB(String t){
    TabFragmentB = t;
}
public String getTabFragmentB(){
    return TabFragmentB;
}

这只是getter和setter一个字符串TabFragmantB。
这将返回该片段的标记您发送数据（让我们把它称为片段B）。所以在片段B的code会是这个样子，它在onCreateView部分自己写出来。

This is just getter and setter for a String TabFragmantB. This will return you the tag of the Fragment to which you are sending data(Lets call it Fragment B).So the code in Fragment B will look something like this ,write it in the onCreateView section itself.

String myTag = getTag();

    ((YourActivity)getActivity()).setTabFragmentB(myTag);

这code将Fragmant B的标签返回到我们的活动。

This code will return you the tag of Fragmant B to our activity.

此外，在Fragmant b创建一个函数，它接受在要采取FragmantB数据的类型。
在这种情况下

Also in Fragmant B create a function which takes in the type of data you want to take in FragmantB. In this case

 public void Fucntion_FragmantB(List<YourObject> ob)
{
    //DO ANYTHING WITH THE DATA
}

现在有一半的工作完成后，让移动到Fragmant A，
这是这样的。

Now Half the work is done ,lets move to Fragmant A, Here it goes something like this.

 List<YourObject> ob=new List<YourObject>();
 String TabOfFragmentB = ((Your_ACTIVITY)getActivity()).getTabFragmentB();

                    Statistics_Fragment fragmentB = (FragmentB)getActivity()
                            .getSupportFragmentManager()
                            .findFragmentByTag(TabOfFragmentB);

                    fragmentB.Fucntion_FragmantB(ob);

请注意，通过改变片段中的A和B的功能，你可以通过任何类型的数据。

Note that by changing the functions in Fragment A and B ,you can pass any type of data.

希望这个作品给大家，因为它为我做的。

Hope this works for everyone ,because it did for me.

随意进行更改。

这篇关于片段标签主机片段之间的通信的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！