MaterialComponents theme alert dialog buttons

I figured out what was causing this problem. I need to use different AlertDialog class:

androidx.appcompat.app.AlertDialog

When I switched to this everything started working as expected. Here's where I found the solution:

https://github.com/material-components/material-components-android/issues/162

When using com.google.android.material:material:1.0.0 and androidx.appcompat.app.AlertDialog you can customize each button in the buttonBar by using Widget.MaterialComponents.Button.TextButton as parent.

val builder: AlertDialog.Builder = AlertDialog.Builder(ContextThemeWrapper(context, R.style.AlertDialogTheme))

Use the default layout or add a custom by builder.setView(R.layout.my_dialog)

In your styles:

<style name="AlertDialogTheme" parent="Theme.MaterialComponents.Light.Dialog.Alert">    <item name="buttonBarPositiveButtonStyle">@style/Alert.Button.Positive</item>    <item name="buttonBarNegativeButtonStyle">@style/Alert.Button.Neutral</item>    <item name="buttonBarNeutralButtonStyle">@style/Alert.Button.Neutral</item></style><style name="Alert.Button.Positive" parent="Widget.MaterialComponents.Button.TextButton">    <item name="backgroundTint">@color/transparent</item>    <item name="rippleColor">@color/colorAccent</item>    <item name="android:textColor">@color/colorPrimary</item>    <item name="android:textSize">14sp</item>    <item name="android:textAllCaps">false</item></style><style name="Alert.Button.Neutral" parent="Widget.MaterialComponents.Button.TextButton">    <item name="backgroundTint">@color/transparent</item>    <item name="rippleColor">@color/colorAccent</item>    <item name="android:textColor">@color/gray_dark</item>    <item name="android:textSize">14sp</item></style>

If you are using the Material Components library the best way to have an AlertDialog is to use the MaterialAlertDialogBuilder.

new MaterialAlertDialogBuilder(context)            .setTitle("Dialog")            .setMessage("Lorem ipsum dolor ....")            .setPositiveButton("Ok", /* listener = */ null)            .setNegativeButton("Cancel", /* listener = */ null)            .show();

It is the default result:

If you want also to apply a different style or color to the buttons you can check this answer.