Description

When using an Android device that supports dark mode (i.e. Android 10) and styles inheriting from Theme.AppCompat.DayNight, the DatePicker dialog box has a white background instead of dark gray when the device is in dark mode, resulting in unreadable text.

Related to: (#8029)

Steps to Reproduce

1. Define a theme in your Android project that inherits from Theme.AppCompat.DayNight
2. Make a datepicker theme that inherits from Theme.AppCompat.DayNight.Dialog
3. Add the datepicker dialog style to the application theme like so:
   @style/AppCompatDialogStyle
4. Set the theme of your MainActivity to the application theme defined above.
5. Run the app on a device in dark mode and click on a DatePicker

Expected Behavior

The DatePicker is styled according to the theme, with white text on a dark background.

Actual Behavior

The DatePicker style is only partially applied, resulting in white text on a white background.

Basic Information

• Version with issue: 4.4.0
• Last known good version: Unknown
• IDE: Visual Studio Professional 2019, version 16.4.2
• Platform Target Frameworks:
  • Android: 10.0
• Android Support Library Version: 28.0.0.3
• Affected Devices: Pixel 2 with Android 10.0

Screenshots

Reproduction Link

DisplayAlertTheming 2.zip