Change Color from material outlined button doesn't work

Question

I want to change the color of the active toggle button. But just the change of the rippleColor makes a difference. I wish to customize the background color of the active button and the text color.

<style name="ToggleButtonGroupStyle" parent="Widget.MaterialComponents.Button.OutlinedButton">
            <item name="rippleColor">@color/colorAccent</item>
</style>

In the following toggleButtonGroup I used this style from above:

         <com.google.android.material.button.MaterialButtonToggleGroup
            android:id="@+id/priority_btn_group"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:orientation="horizontal"
            android:layout_alignParentLeft="true"
            app:selectionRequired="true"
            app:singleSelection="true"
            app:checkedButton="@+id/btn_one"
            >

            <com.google.android.material.button.MaterialButton
                android:id="@+id/btn_one"
                style="@style/ToggleButtonGroupStyle"
                android:layout_width="@dimen/priority_btn_width"
                android:layout_height="wrap_content"
                android:shadowColor="@color/project_text"
                android:text="0" />

            <com.google.android.material.button.MaterialButton
                style="@style/ToggleButtonGroupStyle"
                android:layout_width="@dimen/priority_btn_width"
                android:layout_height="wrap_content"
                android:text="!" />

            <com.google.android.material.button.MaterialButton
                style="@style/ToggleButtonGroupStyle"
                android:layout_width="@dimen/priority_btn_width"
                android:layout_height="wrap_content"
                android:text="!!" />

            <com.google.android.material.button.MaterialButton
                style="@style/ToggleButtonGroupStyle"
                android:layout_width="50dp"
                android:layout_height="wrap_content"
                android:text="!!!" />


        </com.google.android.material.button.MaterialButtonToggleGroup>

Could anybody give me a hint what the problem here is? Thanks :)

Answer 1

The background color of the checked buttons is based on the colorPrimary attribute.
You can use:

<com.google.android.material.button.MaterialButton
    android:id="@+id/btn_one"
    style="?attr/materialButtonOutlinedStyle"
    android:theme="@style/ThemeOverlay.Custom.Button"

with:

<style name="ThemeOverlay.Custom.Button" parent="">
    <item name="colorPrimary">@color/....</item>
</style>

or you can use a custom style with:

    <com.google.android.material.button.MaterialButton
        android:id="@+id/btn_one"
        style="@style/ToggleButtonGroupStyle"

with:

<style name="ToggleButtonGroupStyle" parent="Widget.MaterialComponents.Button.OutlinedButton">
    <item name="backgroundTint">@color/custom_selector</item>
</style>


<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:color="@color/..." android:state_checked="true"/>  <!-- selected color -->
    <item android:color="@android:color/transparent" android:state_checked="false"/>
</selector>