android -如何在片段中加载PreferenceFragment

public class SettingsFragment extends PreferenceFragment {
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        addPreferencesFromResource(R.xml.preferences);
    }
}

<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">
    <PreferenceCategory android:title="General">
        <CheckBoxPreference
            android:key="notifications"
            android:title="Enable Notifications"
            android:summary="Receive notifications when new content is available"
            android:defaultValue="true" />
    </PreferenceCategory>
    <PreferenceCategory android:title="Display">
        <ListPreference
            android:key="theme"
            android:title="Theme"
            android:summary="Select the app theme"
            android:entries="@array/theme_entries"
            android:entryValues="@array/theme_values"
            android:defaultValue="light" />
    </PreferenceCategory>
</PreferenceScreen>

public class MainActivity extends AppCompatActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        // 加载SettingsFragment
        getFragmentManager().beginTransaction()
                .replace(R.id.container, new SettingsFragment())
                .commit();
    }
}