android – 如何将数据从当前片段传递到以前的片段

我有两个片段A和B.我从片段A开始片段B.我需要在片段B关闭之前将数据从片段B传递到片段A.它就像startActivityForResult()的想法.

在片段A中我称之为片段B：

FragmentB calendarDialog = new FragmentB();
                calendarDialog.setTargetFragment(CurrentPanchangDialog.this,1);
                Fragmenttransaction transaction = getActivity().getSupportFragmentManager().begintransaction();
                transaction.setTransition(Fragmenttransaction.TRANSIT_FRAGMENT_OPEN);
                transaction.setCustomAnimations(R.anim.enter_from_left,R.anim.exit_to_right,R.anim.enter_from_right,R.anim.exit_to_left);
                transaction.add(android.R.id.content,calendarDialog).addToBACkStack(null).commit();

现在在片段B中我在关闭时调用这样的东西：

getTargetFragment().onActivityResult(
                    getTargetrequestCode(),Activity.RESULT_OK,new Intent().putExtra("data","datafrom C")
            );
            getActivity().getSupportFragmentManager().popBACkStackImmediate();

现在在Base活动中,我将重写onActivityForResult()：

@Override
    protected void onActivityResult(int requestCode,int resultCode,Intent data) {
        Fragment pFragment = getSupportFragmentManager().findFragmentById(R.id.content);
        if (pFragment instanceof CurrentPanchangDialog) {
            if (pFragment != null) {
                pFragment.onActivityResult(requestCode,resultCode,data);
            }
        }
        super.onActivityResult(requestCode,data);
    }

我没有将数据从片段B返回到片段A.

public interface FragmentCallBACk {
    void onDataSent(String yourData);
}

public class FragmentA implements FragmentCallBACk {

    @Override
    void onDataSent(String yourData){
        //Do something with your data
    }
}

public class FragmentB {

private FragmentCallBACk fragmentCallBACk;

    public void setFragmentCallBACk(FragmentCallBACk callBACk) {
        this.fragmentCallBACk = callBACk;
    }
}

fragmentB.setFragmentCallBACk(this);

public class FragmentB {

    public void onDestroy() {
        if(fragmentCallBACk != null){
            fragmentCallBACk.onDataSent("Some data from FragmentB");
        }
        super.onDestroy();
    }
}