在android studio中更改警报对话框的正按钮的颜色

Question

I am trying to change my positive button of the alert dialog. Can someone please help me?

This is what I have tried so far in my theme.xml from reading other people's answer:

<resources xmlns:tools="http://schemas.android.com/tools">
    <!-- Base application theme. -->
    <style name="Theme.MyFirstTest" parent="Theme.MaterialComponents.Light.NoActionBar">
        <!-- Primary brand color. -->
        <item name="colorPrimary">@color/yellow_200</item>
        <item name="colorPrimaryVariant">@color/yellow_500</item>
        <item name="colorOnPrimary">@color/black</item>
        <!-- Secondary brand color. -->
        <item name="colorSecondary">@color/teal_200</item>
        <item name="colorSecondaryVariant">@color/teal_700</item>
        <item name="colorOnSecondary">@color/black</item>
        <!-- Status bar color. -->
        <item name="android:statusBarColor" tools:targetApi="l">?attr/colorPrimaryVariant</item>
        <!-- Customize your theme here. -->
        <item name="android:positiveButtonText">#00f</item>
    </style>
    <style name="AlertDialogTheme" parent="Theme.MaterialComponents.Light.Dialog.Alert">
        <item name="buttonBarPositiveButtonStyle">@style/Alert.Button.Positive</item>
    </style>

    <style name="Alert.Button.Positive" parent="Widget.MaterialComponents.Button.TextButton">
        <item name="android:textColor">#00f</item>
        <item name="android:textSize">14sp</item>
        <item name="android:textAllCaps">false</item>
    </style>

</resources>

I am trying to change the positive button color to blue (#00f), but it kept on showing my primary color (yellow_200). I honestly do not know how to customize this theme: Theme.MaterialComponents.Light.NoActionBar Is there a website that guides what is included in this theme and how to customize it?

Thank you!

Answer 1

There is some things that are currently wrong. You need to update your styles as follows to change the text color

<style name="AlertDialogTheme" parent="ThemeOverlay.MaterialComponents.Dialog.Alert">
    <item name="buttonBarNegativeButtonStyle">@style/NegativeButtonStyle</item>
    <item name="buttonBarPositiveButtonStyle">@style/PositiveButtonStyle</item>
</style>

<style name="NegativeButtonStyle" parent="Widget.MaterialComponents.Button.TextButton.Dialog">
    <item name="android:textColor">#f00</item>
</style>

<style name="PositiveButtonStyle" parent="Widget.MaterialComponents.Button.TextButton.Dialog">
    <item name="android:textColor">#00f</item>
</style>

You can find more information regarding material components and their theming on their website as follows

https://material.io/components/dialogs/android#theming-dialogs