Display Overlay Demo


https://github.com/j-vanetten/Glass-ScreenOnOverlay
https://github.com/atifmahmood29/overlays-floating-window-like-facebook-messenger
https://github.com/YukiAsu/LockScreenOverlay
https://github.com/reuben-li/android-cracked-screen-prank
https://github.com/mkch/Overlay
https://github.com/Birch-san/touhou-walk (Just Wow)
https://github.com/DevinFu/OverlayLocker
https://github.com/ivolek/ScreenOverlay
https://github.com/matsuhiro/TestForTYPE_SYSTEM_OVERLAY
https://github.com/EthanGr/ScreenOverlayAndroidProject
https://github.com/TylerWomack/ScreenOverlayDemo
https://github.com/vinaywadhwa/AndroidScreenOverlay

Xposed Module
https://github.com/generalbrus/BrightLockscreen

Animation Library
https://uxplanet.org/16-android-menu-open-source-ui-animation-components-libraries-java-kotlin-9f3e54f64280
https://github.com/codepath/android_guides/wiki/Animations
https://github.com/wirecube/android_additive_animations