AnimationEasingFunctions

Why we included this project

Android's default interpolators deliver frames at a constant speed, which is why so much motion on the platform ends up stiff. This library wraps a solid set of Robert Penner's easing functions behind a small Java API, so you can give ObjectAnimator tweens a bounce or a springy overshoot without writing timing math yourself. The bundled demo is genuinely useful for previewing each curve before you commit one to your own screen. It is a lightweight utility rather than a full animation framework, which is exactly what makes it easy to drop into a modern Android Gradle project. The old NineOldAndroids dependency was removed years ago, so there is nothing extra to carry along.