Fragment activity not inflating

For my master detail flow app I'm trying to inflate my Continents list view on my tablet but it won't do so and I end up with these errors in my log cat. Does anyone know what I'm doing wrong?

Continents List xml

    <LinearLayout xmlns:android="http://ift.tt/nIICcg"
    xmlns:tools="http://ift.tt/LrGmb4" android:layout_width="match_parent"
    android:layout_height="match_parent" android:layout_marginLeft="16dp"
    android:layout_marginRight="16dp" android:baselineAligned="false"
    android:divider="?android:attr/dividerHorizontal" android:orientation="horizontal"
    android:showDividers="middle" tools:context=".ItemListActivity">

    <fragment android:id="@+id/continents_list" android:name="com.apptacularapps.md.ContinentsListFragment"
        android:layout_width="0dp" android:layout_height="match_parent" android:layout_weight="1"
        tools:layout="@android:layout/list_content" />

    <FrameLayout android:id="@+id/item_detail_container" android:layout_width="0dp"
        android:layout_height="match_parent" android:layout_weight="3" />

</LinearLayout>

ContinentsListFragment.java

    package com.apptacularapps.md;

import android.app.Activity;
import android.os.Bundle;
import android.support.v4.app.ListFragment;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.ListView;

public class ContinentsListFragment extends ListFragment {

    private static final String STATE_ACTIVATED_POSITION = "activated_position";

    private Callbacks mCallbacks = sContinentsCallbacks;

    private int mActivatedPosition = ListView.INVALID_POSITION;

    public interface Callbacks {
        public void onItemSelected(String id);
    }

    private static Callbacks sContinentsCallbacks = new Callbacks() {
        @Override
        public void onItemSelected(String id) {
        }
    };

    public ContinentsListFragment() {
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        // TODO: replace with a real list adapter.
        setListAdapter(new ArrayAdapter<ContinentsContent.ContinentsItem>(
                getActivity(),
                android.R.layout.simple_list_item_activated_1,
                android.R.id.text1,
                ContinentsContent.ITEMS));
    }

    @Override
    public void onViewCreated(View view, Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);

        if (savedInstanceState != null
                && savedInstanceState.containsKey(STATE_ACTIVATED_POSITION)) {
            setActivatedPosition(savedInstanceState.getInt(STATE_ACTIVATED_POSITION));
        }
    }

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

        // Activities containing this fragment must implement its callbacks.
        if (!(activity instanceof Callbacks)) {
            throw new IllegalStateException("Activity must implement fragment's callbacks.");
        }

        mCallbacks = (Callbacks) activity;
    }

    @Override
    public void onDetach() {
        super.onDetach();

        // Reset the active callbacks interface to the Continents implementation.
        mCallbacks = sContinentsCallbacks;
    }

    @Override
    public void onListItemClick(ListView listView, View view, int position, long id) {
        super.onListItemClick(listView, view, position, id);

        mCallbacks.onItemSelected(ContinentsContent.ITEMS.get(position).id);
    }

    @Override
    public void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);
        if (mActivatedPosition != ListView.INVALID_POSITION) {
            outState.putInt(STATE_ACTIVATED_POSITION, mActivatedPosition);
        }
    }

    public void setActivateOnItemClick(boolean activateOnItemClick) {
        getListView().setChoiceMode(activateOnItemClick
                ? ListView.CHOICE_MODE_SINGLE
                : ListView.CHOICE_MODE_NONE);
    }

    private void setActivatedPosition(int position) {
        if (position == ListView.INVALID_POSITION) {
            getListView().setItemChecked(mActivatedPosition, false);
        } else {
            getListView().setItemChecked(position, true);
        }

        mActivatedPosition = position;
    }
}

Logcat

    05-20 18:33:54.709  23134-23134/? E/libprocessgroup﹕ failed to make and chown /acct/uid_10056: Read-only file system
05-20 18:33:54.709  23134-23134/? W/Zygote﹕ createProcessGroup failed, kernel missing CONFIG_CGROUP_CPUACCT?
05-20 18:33:54.710  23134-23134/? I/art﹕ Not late-enabling -Xcheck:jni (already on)
05-20 18:33:55.254  23134-23147/com.apptacularapps.md I/art﹕ Background sticky concurrent mark sweep GC freed 3119(263KB) AllocSpace objects, 0(0B) LOS objects, 27% free, 825KB/1135KB, paused 18.552ms total 137.540ms
05-20 18:33:55.333  23134-23162/com.apptacularapps.md D/OpenGLRenderer﹕ Render dirty regions requested: true
05-20 18:33:55.340  23134-23134/com.apptacularapps.md D/﹕ HostConnection::get() New Host Connection established 0xa6933490, tid 23134
05-20 18:33:55.351  23134-23134/com.apptacularapps.md D/Atlas﹕ Validating map...
05-20 18:33:55.408  23134-23162/com.apptacularapps.md D/﹕ HostConnection::get() New Host Connection established 0xa6933af0, tid 23162
05-20 18:33:55.425  23134-23162/com.apptacularapps.md I/OpenGLRenderer﹕ Initialized EGL, version 1.4
05-20 18:33:55.440  23134-23162/com.apptacularapps.md D/OpenGLRenderer﹕ Enabling debug mode 0
05-20 18:33:55.472  23134-23162/com.apptacularapps.md W/EGL_emulation﹕ eglSurfaceAttrib not implemented
05-20 18:33:55.472  23134-23162/com.apptacularapps.md W/OpenGLRenderer﹕ Failed to set EGL_SWAP_BEHAVIOR on surface 0xa6988180, error=EGL_SUCCESS
05-20 18:33:56.547  23134-23134/com.apptacularapps.md D/AndroidRuntime﹕ Shutting down VM
05-20 18:33:56.548  23134-23134/com.apptacularapps.md E/AndroidRuntime﹕ FATAL EXCEPTION: main
    Process: com.apptacularapps.md, PID: 23134
    java.lang.IllegalStateException: Activity must implement fragment's callbacks.
            at com.apptacularapps.md.ContinentsListFragment.onAttach(ContinentsListFragment.java:90)
            at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:907)
            at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1138)
            at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:740)
            at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1501)
            at android.support.v4.app.FragmentManagerImpl$1.run(FragmentManager.java:458)
            at android.os.Handler.handleCallback(Handler.java:739)
            at android.os.Handler.dispatchMessage(Handler.java:95)
            at android.os.Looper.loop(Looper.java:135)
            at android.app.ActivityThread.main(ActivityThread.java:5221)
            at java.lang.reflect.Method.invoke(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:372)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)