onActivityResult() not called in new nested fragment API

Question

I have been using the new nested fragment API that Android includes in the support library.

The problem that I am facing with nested fragments is that, if a nested fragment (that is, a fragment that has been added to another fragment via the FragmentManagerreturned by getChildFragmentManager()) calls startActivityForResult(), the nested fragment's onActivityResult() method is not called. However, both the parent fragment's onActivityResult() and activity's onActivityResult() do get called.

I don't know if I am missing something about nested fragments, but I did not expect the described behavior. Below is the code that reproduces this problem. I would very much appreciate if someone can point me in the right direction and explain to me what I am doing wrong:

package com.example.nestedfragmentactivityresult;

import android.media.RingtoneManager;
import android.os.Bundle;
import android.content.Intent;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.Toast;

public class MainActivity extends FragmentActivity
{
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        this.getSupportFragmentManager()
            .beginTransaction()
            .add(android.R.id.content, new ContainerFragment())
            .commit();
    }

    public void onActivityResult(int requestCode, int resultCode, Intent data)
    {
        super.onActivityResult(requestCode, resultCode, data);

        // This is called
        Toast.makeText(getApplication(),
            "Consumed by activity",
            Toast.LENGTH_SHORT).show();
    }

    public static class ContainerFragment extends Fragment
    {
        public final View onCreateView(LayoutInflater inflater,
                                       ViewGroup container,
                                       Bundle savedInstanceState)
        {
            View result = inflater.inflate(R.layout.test_nested_fragment_container,
                container,
                false);

            return result;
        }

        public void onActivityCreated(Bundle savedInstanceState)
        {
            super.onActivityCreated(savedInstanceState);
            getChildFragmentManager().beginTransaction()
                .add(R.id.content, new NestedFragment())
                .commit();
        }

        public void onActivityResult(int requestCode,
                                     int resultCode,
                                     Intent data)
        {
            super.onActivityResult(requestCode, resultCode, data);

            // This is called
            Toast.makeText(getActivity(),
                "Consumed by parent fragment",
                Toast.LENGTH_SHORT).show();
        }
    }

    public static class NestedFragment extends Fragment
    {
        public final View onCreateView(LayoutInflater inflater,
                                       ViewGroup container,
                                       Bundle savedInstanceState)
        {
            Button button = new Button(getActivity());
            button.setText("Click me!");
            button.setOnClickListener(new View.OnClickListener()
            {
                public void onClick(View v)
                {
                    Intent intent = new Intent(RingtoneManager.ACTION_RINGTONE_PICKER);
                    startActivityForResult(intent, 0);
                }
            });

            return button;
        }

        public void onActivityResult(int requestCode,
                                     int resultCode,
                                     Intent data)
        {
            super.onActivityResult(requestCode, resultCode, data);

            // This is NOT called
            Toast.makeText(getActivity(),
                "Consumed by nested fragment",
                Toast.LENGTH_SHORT).show();
        }
    }
}

test_nested_fragment_container.xml is:

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/content"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

</FrameLayout>

Answer 1

I solved this problem with the following code (support library is used):

In container fragment override onActivityResult in this way:

@Override
    public void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);

        List<Fragment> fragments = getChildFragmentManager().getFragments();
        if (fragments != null) {
            for (Fragment fragment : fragments) {
                fragment.onActivityResult(requestCode, resultCode, data);
            }
        }
    }

Now nested fragment will receive call to onActivityResult method.

Also, as noted Eric Brynsvold in similar question, nested fragment should start activity using it's parent fragment and not the simple startActivityForResult() call. So, in nested fragment start activity with:

getParentFragment().startActivityForResult(intent, requestCode);