styles.xml

<resources>

    <!-- Base application theme. -->
    <style name="AppTheme" parent="Theme.AppCompat">
        <!-- Customize your theme here. -->
        <item name="colorPrimary">@android:color/black</item>
        <item name="colorPrimaryDark">@android:color/background_dark</item>
        <item name="colorAccent">@color/colorAccent</item>
    </style>

    <style name="TextAppearance.AppCompat.Widget.Actionbar.Title" parent="android:TextAppearance">

    </style>
    <style name="AppTheme.NoActionBar">
        <item name="windowActionBar">false</item>
        <item name="windowNoTitle">true</item>
    </style>

    <style name="AppTheme.AppBarOverlay" parent="ThemeOverlay.AppCompat.Dark.ActionBar" />

    <style name="AppTheme.PopupOverlay" parent="ThemeOverlay.AppCompat.Light" />


</resources>