This tiny 'library' is supposed to help you build complex animations and behavior easily by offering a promise-like API.
Here's a simple example animation in four steps:
new AndroidAnimationBuilder(animatedView)
.rotateBy(20)
.then().rotateBy(-40)
.then().reset()
.execute();makes:
... and here is a complex example (this is the one from the demo app) to show off what can be achieved while still keeping it readable:
new AndroidAnimationBuilder(v).setDefaultStepDuration(1000)
// first step: quick preparations.
.alpha(0).ms(10).run(view -> startButton.setEnabled(false))
// dramatic entrance: Appear spinning
.then().alpha(1).rotateBy(-90)
// some more spinning fun. All those steps will take 1 second each.
.then().rotateBy(180)
.then().rotateBy(-285 -360)
.then().rotateBy(15)
// some moving fun
.then().translateX(-1000).ms(600)
// phew. Let's have a break
.pause(500)
// hop out of the screen before moving:
// 'run(..)' is executed before the animation of the step is started
.then().run(view -> view.setTranslationX(1500)).translateX(-1500)
.then().translateX(0).ms(100)
.then().translateY(-100).scaleX(2f).ms(500)
.then().run(view -> view.setBackgroundColor(randomColor()))
.then().rotateBy(90).scaleX(1).scaleY(3)
// finish the show!
// reset: Undo everything that is not defined in the step to what it was
// before the animation was started.
.then().reset().scaleX(0).scaleY(0).ms(2000)
// everything back to the start
.then().reset().ms(1).runAfter(view -> startButton.setEnabled(true))
.execute();
If the xml is enough for your needs, you should definitely use the xml. The AnimationBuilder is supposed to help in complex cases, where a sequence of animation steps is required, probably with hooks in between.
Absolutely! The AnimationBuilder internally even uses ViewPropertyAnimators. But with the Builder, stringing them together into a sequence and adding hooks somewhere along the way should be much easier.
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Sorry, not yet. For now, just copy&paste AndroidAnimationBuilder.java to your project and you're good.
Will probably add gradle support if someone requests it.
Working on it :)