ab_toolbar.xml

<?xml version="1.0" encoding="utf-8"?>

<android.support.v7.widget.Toolbar xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/ab_toolbar"
    app:popupTheme="@style/MyActionBarLogo"
    android:layout_width="match_parent"
    android:layout_height="?attr/actionBarSize"
    android:background="@color/primary_purple_dark"
    android:fitsSystemWindows="true"
    app:layout_scrollFlags="scroll|enterAlways"
    />

RatingBarDrawable.xml

    <!-- Rating bar drawable -->
    <?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:id="@android:id/background"
        android:drawable="@drawable/apptheme_rate_star_small_off_holo_light" />
    <item android:id="@android:id/secondaryProgress"
        android:drawable="@drawable/apptheme_rate_star_small_half_holo_light" />
    <item android:id="@android:id/progress"
        android:drawable="@drawable/apptheme_rate_star_small_on_holo_light" />
</layer-list>

Theme.xml

    <!-- Base application theme. -->
    <style name="AppTheme" parent="Theme.AppCompat.NoActionBar">
        <item name="android:colorBackground">@color/background_material_light</item>
        <!-- Customize your theme here. -->
    </style>

    <style name="MyActionBarLogo" parent="@style/ThemeOverlay.AppCompat.Light">
        <item name="background">@color/primary_purple_dark</item>
        <item name="logo">@drawable/ic_menu</item>
        <item name="displayOptions">useLogo|showHome</item>
    </style>

    <style name="AppCompatAlertDialogStyle" parent="Theme.AppCompat.Light.Dialog.Alert">
        <item name="colorAccent">@color/accent</item>
        <item name="android:textColorPrimary">@android:color/white</item>
        <item name="android:background">@color/primary_purple</item>
    </style>


    <style name="rating" parent="@android:style/Widget.RatingBar">
        <item name="android:progressDrawable">@drawable/rating</item>
        <item name="android:minHeight">23dp</item>
        <item name="android:maxHeight">25dp</item>
    </style>