Summary

There should be a setting for changing your theme. The current theme should be considered the Light theme, and additionally there should be a dark theme.

Helpful Links

• https://developer.android.com/reference/android/preference/PreferenceScreen.html Reference this for adding the setting
• http://www.javarticles.com/2015/04/android-set-theme-dynamically.html For changing the theme
• https://developer.android.com/guide/topics/ui/themes.html For defining the theme