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This library uses this idea to implement in-memory storage. There are two simple principles:

• MapMemory is a singleton, and it is shared between many consumers
• MapMemory holds data but not knows what data it holds

Spruce is a lightweight animation library that helps choreograph the animations on the screen. With so many different animation libraries out there, developers need to make sure that each view is animating at the appropriate time. Spruce can help designers request complex multi-view animations and not have the developers cringe at the prototype.

Android Saripaar is a simple, yet powerful rule-based UI validation library for Android. It is the SIMPLEST validation library available for Android.