How do I implement this Material Design 2.0 button shape?

Question

I would like to achieve the button shape looking like the one in Material Components example

What I already tried to do is setting custom style for the button like this

    <style name="ButtonAddLeft" parent="Widget.MaterialComponents.Button.Icon">
        <item name="backgroundTint">@color/secondary</item>
        <item name="android:textColor">@color/primary</item>
        <item name="shapeAppearance">@style/ButtonAddLeftShape</item>
    </style>

    <style name="ButtonAddLeftShape">
        <item name="cornerFamilyTopLeft">cut</item>
        <item name="cornerFamilyBottomLeft">cut</item>
        <item name="cornerSize">12dp</item>
    </style>

But this does not look like the one from the example, regardless of how I set the cornerSize.

Answer 1

You need to set the corner cut style to the theme.

    <style name="RightCutButton" parent="ThemeOverlay.MaterialComponents.Light">
        <item name="shapeAppearanceSmallComponent">@style/CornerCut</item>
    </style>

    <style name="CornerCut" parent="ShapeAppearance.MaterialComponents.SmallComponent">
        <item name="cornerFamilyTopRight">cut</item>
        <item name="cornerFamilyBottomRight">cut</item>
        <item name="cornerSizeTopRight">18dp</item>
        <item name="cornerSizeBottomRight">18dp</item>
    </style>

    <style name="AppTheme" parent="Theme.MaterialComponents.Light.DarkActionBar">
        <!-- Customize your theme here. -->
        <item name="shapeAppearanceSmallComponent">@style/CornerCut</item>
    </style>