Verve is an extremely lightweight framework for making toy apps.

Define an Animation class with corresponding Input, Parameters, and Renderer. Attach a android.view.SurfaceView from your UI layer to an AnimationRunner and before you know it you've got your animation's main loop that handles updating and rendering.

Create an instance of this class to hold your Animation, attach or detach a SurfaceView, and handle Activity lifecycle changes.

The magic happens in Animation.update(dt) - this function is responsible for updating the world and all objects therein.

Some handy out-of-the-box inputs are available for manipulating your animation:

• PressDetector for keeping track of stationary touch events
• SwipeDetector for detecting and processing swipes on the screen
• RotationDetector for detecting the device's orientation

Attach these to your AnimationInput class and read from them as you update your animation.

Draw on your android.graphics.Canvas in the AnimationRenderer.updateCanvas(Canvas) by reading the latest state of the properties given to it by the Animation. Perhaps use a Camera if you want maximum versatility, such as moving around in 3D space.

Make use of the mathematical tools package either for computing physics in the world or for preparing and rendering the world objects.