AFAIK, fragments cannot hold other fragments.

UPDATE

With current versions of the Android Support package -- or native fragments on API Level 17 and higher -- you can nest fragments, by means of getChildFragmentManager(). Note that this means that you need to use the Android Support package version of fragments on API Levels 11-16, because even though there is a native version of fragments on those devices, that version does not have getChildFragmentManager().

I needed some more context, so I made an example to show how this is done. The most helpful thing I read while preparing was this:

• Creating and Using Fragments

Activity

activity_main.xml

Add a FrameLayout to your activity to hold the parent fragment.

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"              android:orientation="vertical"              android:layout_width="match_parent"              android:layout_height="match_parent">    <TextView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="Activity"/>    <FrameLayout        android:id="@+id/parent_fragment_container"        android:layout_width="match_parent"        android:layout_height="200dp"/> </LinearLayout>

MainActivity.java

Load the parent fragment and implement the fragment listeners. (See fragment communication.)

import android.support.v4.app.FragmentTransaction;import android.support.v7.app.AppCompatActivity;public class MainActivity extends AppCompatActivity implements ParentFragment.OnFragmentInteractionListener, ChildFragment.OnFragmentInteractionListener {    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        // Begin the transaction        FragmentTransaction ft = getSupportFragmentManager().beginTransaction();        ft.replace(R.id.parent_fragment_container, new ParentFragment());        ft.commit();    }    @Override    public void messageFromParentFragment(Uri uri) {        Log.i("TAG", "received communication from parent fragment");    }    @Override    public void messageFromChildFragment(Uri uri) {        Log.i("TAG", "received communication from child fragment");    }}

Parent Fragment

fragment_parent.xml

Add another FrameLayout container for the child fragment.

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"              android:orientation="vertical"              android:layout_width="match_parent"              android:layout_height="match_parent"              android:layout_margin="20dp"              android:background="#91d0c2">    <TextView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="Parent fragment"/>    <FrameLayout        android:id="@+id/child_fragment_container"        android:layout_width="match_parent"        android:layout_height="match_parent">    </FrameLayout></LinearLayout>

ParentFragment.java

Use getChildFragmentManager in onViewCreated to set up the child fragment.

import android.support.v4.app.Fragment;import android.support.v4.app.FragmentTransaction;    public class ParentFragment extends Fragment {    private OnFragmentInteractionListener mListener;    @Override    public View onCreateView(LayoutInflater inflater, ViewGroup container,                             Bundle savedInstanceState) {        // Inflate the layout for this fragment        return inflater.inflate(R.layout.fragment_parent, container, false);    }    @Override    public void onViewCreated(View view, Bundle savedInstanceState) {        Fragment childFragment = new ChildFragment();        FragmentTransaction transaction = getChildFragmentManager().beginTransaction();        transaction.replace(R.id.child_fragment_container, childFragment).commit();    }    @Override    public void onAttach(Context context) {        super.onAttach(context);        if (context instanceof OnFragmentInteractionListener) {            mListener = (OnFragmentInteractionListener) context;        } else {            throw new RuntimeException(context.toString()                    + " must implement OnFragmentInteractionListener");        }    }    @Override    public void onDetach() {        super.onDetach();        mListener = null;    }    public interface OnFragmentInteractionListener {        // TODO: Update argument type and name        void messageFromParentFragment(Uri uri);    }}

Child Fragment

fragment_child.xml

There is nothing special here.

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"              android:orientation="vertical"              android:layout_width="match_parent"              android:layout_height="match_parent"              android:layout_margin="20dp"              android:background="#f1ff91">    <TextView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="Child fragment"/></LinearLayout>

ChildFragment.java

There is nothing too special here, either.

import android.support.v4.app.Fragment;public class ChildFragment extends Fragment {    private OnFragmentInteractionListener mListener;    @Override    public View onCreateView(LayoutInflater inflater, ViewGroup container,                             Bundle savedInstanceState) {        return inflater.inflate(R.layout.fragment_child, container, false);    }    @Override    public void onAttach(Context context) {        super.onAttach(context);        if (context instanceof OnFragmentInteractionListener) {            mListener = (OnFragmentInteractionListener) context;        } else {            throw new RuntimeException(context.toString()                    + " must implement OnFragmentInteractionListener");        }    }    @Override    public void onDetach() {        super.onDetach();        mListener = null;    }    public interface OnFragmentInteractionListener {        // TODO: Update argument type and name        void messageFromChildFragment(Uri uri);    }}

Notes

• The support library is being used so that nested fragments can be used before Android 4.2.

Since Android 4.2 (API 17) nested fragments become available http://developer.android.com/about/versions/android-4.2.html#NestedFragments

To place fragment inside other fragment use getChildFragmentManager()

It also available in support library!