private static final String TAG = SettingsActivity.class.getSimpleName();

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

    //getSupportActionBar().setDisplayHomeAsUpEnabled(true);

    // load settings fragment
    getFragmentManager().beginTransaction().replace(android.R.id.content, new MainPreferenceFragment()).commit();
}

public static class MainPreferenceFragment extends PreferenceFragment {
    @Override
    public void onCreate(final Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        addPreferencesFromResource(R.xml.pref_main);


    }
}