James Cross James Cross - 3 months ago 86
Android Question

Creating a Preference Screen with support (v21) Toolbar

I was having trouble using the new Material Design toolbar in the support library on a Preference screen.

I have a settings.xml file as below:

<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">
<PreferenceCategory
android:title="@string/AddingItems"
android:key="pref_key_storage_settings">

<ListPreference
android:key="pref_key_new_items"
android:title="@string/LocationOfNewItems"
android:summary="@string/LocationOfNewItemsSummary"
android:entries="@array/new_items_entry"
android:entryValues="@array/new_item_entry_value"
android:defaultValue="1"/>

</PreferenceCategory>
</PreferenceScreen>


The strings are defined elsewhere.

Answer

You can use a PreferenceFragment, as an alternative to PreferenceActivity. So, here is the wrapping Activity example:

public class MyPreferenceActivity extends ActionBarActivity {
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.pref_with_actionbar);

        android.support.v7.widget.Toolbar toolbar = (android.support.v7.widget.Toolbar) findViewById(uk.japplications.jcommon.R.id.toolbar);
        setSupportActionBar(toolbar);

        getFragmentManager().beginTransaction().replace(R.id.content_frame, new MyPreferenceFragment()).commit();
    }
}

And here is the layout file (pref_with_actionbar):

<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <android.support.v7.widget.Toolbar
        android:id="@+id/toolbar"
        android:layout_height="@dimen/action_bar_height"
        android:layout_width="match_parent"
        android:minHeight="?attr/actionBarSize"
        android:background="?attr/colorPrimary"
        app:theme="@style/ToolbarTheme.Base"
        app:popupTheme="@style/ThemeOverlay.AppCompat.Light"/>

    <FrameLayout
        android:id="@+id/content_frame"
        android:layout_below="@+id/toolbar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

</RelativeLayout>

And finally the PreferenceFragment:

public static class MyPreferenceFragment extends PreferenceFragment{
    @Override
    public void onCreate(final Bundle savedInstanceState){
        super.onCreate(savedInstanceState);
        addPreferencesFromResource(R.xml.settings);
    }
}

I hope this helps someone.