去除Android Material DatePickerDialog中的纯色背景

<style name="DatePickerDialogTheme" parent="Theme.MaterialComponents.Light.Dialog">
    <item name="colorPrimary">@color/your_color_primary</item>
    <item name="colorPrimaryVariant">@color/your_color_primary_variant</item>
    <item name="colorOnPrimary">@color/your_color_on_primary</item>
    <item name="android:background">@drawable/your_custom_background</item>
</style>

DatePickerDialog datePickerDialog = new DatePickerDialog(
        context,
        R.style.DatePickerDialogTheme,
        dateSetListener,
        initialYear,
        initialMonth,
        initialDay
);