我已经超过2引用和尽我所能理解2片段之间的通信。随着从previous问题的帮助就在这里+ 2引用我能想出这个code。什么我必须把我的FragB检索选择在ListFragment弗拉加取得了用户？

主要活动：

 公共类MainActivity扩展活动实现OnDataPass {
...

@覆盖
公共无效onDataPass（字符串数据）{
    // TODO自动生成方法存根

    弗拉加为Transaction1 =（（弗拉加）getFragmentManager（）findFragmentByTag（ItemRoleList））;
    transaction1.dataPasser.onDataPass（数据）;

}
 

}

下面是弗拉加：

 公共类弗拉加扩展ListFragment {

OnDataPass dataPasser;

公共接口OnDataPass {
    公共无效onDataPass（字符串数据）;
}

@覆盖
公共无效onAttach（活性）{
    super.onAttach（一）;

    //这将确保集装箱活动已实施
    //回调接口。如果不是，它抛出一个异常
    尝试 {
        dataPasser =（OnDataPass）一个;
    }赶上（ClassCastException异常E）{
        抛出新ClassCastException异常（a.toString（）
                +必须实现OnHeadlineSelectedListener）;
    }
}
 

解决方案

下面是我的理解。你有拖片段（A，B）的活性。 A是列表片段。关于选择在一个项目，你必须通过一个字符串到B。

第一个覆盖 onListItemClick（）在片段A

FragemtA：

 公共类碎裂扩展ListFragment {
    ...

    无效onListItemClick（ListView的L，视图V，INT位置，长的id）{
        datapasser.onDatapass（数据）//这里传递字符串
    }
}
 

在您的活动的onDataPass方式：

 无效onDataPass（字符串数据）{
    FragmentB dataUser = getFragmentB（）; //你FragmentB对象
    dataUser.use（数据）;
}
 

片段B：

 公共类FragmentB扩展片段{
    ...

    无效的使用（字符串数据）{
        //这里使用的数据
    }
}
 

I have been over 2 references and tried my best to understand the communication between 2 fragments. With the help from a previous question on here + the 2 references I was able to come up with this code. What would I have to put in my FragB to retrieve the choice the user made in ListFragment FragA?

Main Activity:

public class MainActivity extends Activity implements OnDataPass{
...

@Override
public void onDataPass(String data) {
    // TODO Auto-generated method stub

    FragA transaction1 = ((FragA) getFragmentManager().findFragmentByTag("ItemRoleList"));
    transaction1.dataPasser.onDataPass(data);

}

}

Here is FragA:

public class FragA extends ListFragment{

OnDataPass dataPasser;

public interface OnDataPass{
    public void onDataPass(String data);
}

@Override
public void onAttach(Activity a) {
    super.onAttach(a);

    // This makes sure that the container activity has implemented
    // the callback interface. If not, it throws an exception
    try {
        dataPasser = (OnDataPass) a;
    } catch (ClassCastException e) {
        throw new ClassCastException(a.toString()
                + " must implement OnHeadlineSelectedListener");
    }
}

Here is what i understood. You have tow fragments(A, B) in an activity. A is a list fragment. on selecting an item in A, you have to pass a String to B.

First override onListItemClick() in your Fragment A

FragemtA:

public class FragmentA extends ListFragment{
    ...

    void onListItemClick(ListView l, View v, int position, long id){
        datapasser.onDatapass(data)//here pass the String
    }
}

In your activity's onDataPass method:

void onDataPass(String data){
    FragmentB dataUser = getFragmentB();//Your FragmentB object
    dataUser.use(data);
}

Fragment B:

public class FragmentB extends Fragment{
    ...

    void use(String data){
        //here use the data
    }
}