Miwok app: Category screen with pressed states

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/tan_background"
    android:orientation="vertical"
    tools:context="com.example.android.miwok.MainActivity">

    <!-- Numbers category -->
    <FrameLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@color/category_numbers">
        <TextView
            android:id="@+id/numbers"
            style="@style/CategoryStyle"
            android:background="?android:attr/selectableItemBackground"
            android:text="@string/category_numbers" />
    </FrameLayout>

    <!-- Family category -->
    <FrameLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@color/category_family">
        <TextView
            android:id="@+id/family"
            style="@style/CategoryStyle"
            android:background="?android:attr/selectableItemBackground"
            android:text="@string/category_family" />
    </FrameLayout>

    <!-- Colors category -->
    <FrameLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@color/category_colors">
        <TextView
            android:id="@+id/colors"
            style="@style/CategoryStyle"
            android:background="?android:attr/selectableItemBackground"
            android:text="@string/category_colors" />
    </FrameLayout>

    <!-- Phrases category -->
    <FrameLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@color/category_phrases">
        <TextView
            android:id="@+id/phrases"
            style="@style/CategoryStyle"
            android:background="?android:attr/selectableItemBackground"
            android:text="@string/category_phrases" />
    </FrameLayout>
</LinearLayout>