btn_bg_color_primary_selector.xml

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:color="?colorPrimary" android:state_enabled="true" />
    <item android:alpha="0.38" android:color="?colorPrimary" />
</selector>

btn_icon_color_on_primary_selector.xml

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:color="?colorPrimary" android:state_enabled="true" />
    <item android:alpha="0.38" android:color="?colorPrimary" />
</selector>

btn_icon_color_primary_selector.xml

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:color="?colorPrimary" android:state_enabled="true" />
    <item android:alpha="0.38" android:color="?colorPrimary" />
</selector>

btn_text_color_on_primary_selector.xml

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:color="?colorOnPrimary" android:state_enabled="true" />
    <item android:alpha="0.38" android:color="?colorOnPrimary" />
</selector>

btn_text_color_primary_selector.xml

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:color="?colorPrimary" android:state_enabled="true" />
    <item android:alpha="0.38" android:color="?colorPrimary" />
</selector>

primary_16.xml

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">

    <item android:alpha="0.16" android:color="?colorPrimary" />

</selector>

theme_overlays.xml

    <style name="ThemeOverlay.Primary" parent="" />

    <style name="ThemeOverlay.Secondary" parent="">
        <item name="colorPrimary">?colorSecondary</item>
        <item name="colorOnPrimary">?colorOnSecondary</item>
    </style>

    <style name="ThemeOverlay.Error" parent="">
        <item name="colorPrimary">?colorError</item>
        <item name="colorOnPrimary">?colorOnError</item>
    </style>

uikit_styles_buttons.xml

    <style name="Button.Float" parent="Widget.MaterialComponents.ExtendedFloatingActionButton">
        <item name="backgroundTint">@color/btn_bg_color_primary_selector</item>
        <item name="android:textColor">@color/btn_text_color_on_primary_selector</item>
        <item name="iconTint">@color/btn_icon_color_on_primary_selector</item>
    </style>

    <style name="Button.Float.Primary">
        <item name="android:theme">@style/ThemeOverlay.Primary</item>
    </style>

    <style name="Button.Float.Secondary">
        <item name="android:theme">@style/ThemeOverlay.Secondary</item>
    </style>


    <style name="Button.Text" parent="Widget.MaterialComponents.Button.TextButton">
        <item name="android:textColor">@color/btn_text_color_primary_selector</item>
        <item name="rippleColor">@color/primary_16</item>
        <item name="iconGravity">textStart</item>
        <item name="iconTint">@color/btn_icon_color_primary_selector</item>
        <item name="iconSize">20sp</item>
    </style>

    <style name="Button.Text.Primary">
        <item name="android:theme">@style/ThemeOverlay.Primary</item>
    </style>

    <style name="Button.Text.Caution">
        <item name="android:theme">@style/ThemeOverlay.Error</item>
    </style>