Pros of rebound

• More comprehensive physics-based animation system
• Supports complex spring animations and chained animations
• Provides a visual UI for designing and testing animations

Cons of rebound

• Steeper learning curve due to its more complex API
• Potentially overkill for simple easing animations
• Larger library size compared to EasingInterpolator

Code Comparison

EasingInterpolator:

EasingInterpolator interpolator = new EasingInterpolator(Ease.CUBIC_OUT);
ObjectAnimator animator = ObjectAnimator.ofFloat(view, "translationY", 0, 100);
animator.setInterpolator(interpolator);
animator.start();

rebound:

Spring spring = springSystem.createSpring();
spring.addListener(new SimpleSpringListener() {
    @Override
    public void onSpringUpdate(Spring spring) {
        float value = (float) spring.getCurrentValue();
        view.setTranslationY(value);
    }
});
spring.setEndValue(100);

EasingInterpolator is simpler to use for basic easing animations, while rebound offers more control and flexibility for complex, physics-based animations. EasingInterpolator is lightweight and easy to integrate, whereas rebound provides a more robust animation system with additional features and customization options.

Pros of AndroidViewAnimations

• Offers a wide range of pre-built animations for Android views
• Provides a simple and intuitive API for applying animations
• Includes support for custom animations and easing functions

Cons of AndroidViewAnimations

• Larger library size compared to EasingInterpolator
• May include unnecessary animations for projects with specific needs
• Less focused on easing functions, which are the core of EasingInterpolator

Code Comparison

EasingInterpolator:

EasingInterpolator interpolator = new EasingInterpolator(Ease.CUBIC_IN);
ObjectAnimator animator = ObjectAnimator.ofFloat(view, "translationY", 0, 100);
animator.setInterpolator(interpolator);
animator.start();

AndroidViewAnimations:

YoYo.with(Techniques.BounceInUp)
    .duration(700)
    .playOn(view);

EasingInterpolator focuses on providing various easing functions for use with Android's animation system, while AndroidViewAnimations offers a higher-level API with pre-built animations. EasingInterpolator gives more control over the interpolation, while AndroidViewAnimations simplifies the process of applying common animations to views.

Pros of NineOldAndroids

• Broader compatibility, supporting Android 1.0 and up
• More comprehensive animation library with a wider range of features
• Well-established and widely adopted in the Android development community

Cons of NineOldAndroids

• No longer actively maintained (last update in 2014)
• Larger library size compared to EasingInterpolator
• May include unnecessary features for projects only needing easing functions

Code Comparison

EasingInterpolator:

EasingInterpolator interpolator = new EasingInterpolator(Ease.CUBIC_IN);
ObjectAnimator animator = ObjectAnimator.ofFloat(view, "translationY", 0, 100);
animator.setInterpolator(interpolator);
animator.start();

NineOldAndroids:

ObjectAnimator animator = ObjectAnimator.ofFloat(view, "translationY", 0, 100);
animator.setInterpolator(new AccelerateInterpolator());
animator.start();

Summary

EasingInterpolator is a lightweight library focused specifically on easing functions, while NineOldAndroids is a more comprehensive animation library with broader compatibility. EasingInterpolator is actively maintained and offers a wide range of easing options, making it a good choice for projects that only need easing functionality. NineOldAndroids, while no longer maintained, provides a complete animation solution for older Android versions but may be overkill for simpler animation needs.

Pros of recyclerview-animators

• Specifically designed for RecyclerView animations, offering a wide range of pre-built animations
• Provides easy-to-use methods for adding, removing, and changing items with animations
• Supports custom animations and interpolators for more flexibility

Cons of recyclerview-animators

• Limited to RecyclerView animations, while EasingInterpolator can be used with any Android animation
• May have a slightly larger footprint due to its more comprehensive feature set
• Requires more setup and configuration compared to the simpler EasingInterpolator

Code Comparison

EasingInterpolator:

ObjectAnimator animator = ObjectAnimator.ofFloat(view, "translationY", 0, 100);
animator.setInterpolator(new EasingInterpolator(Ease.CUBIC_OUT));
animator.start();

recyclerview-animators:

RecyclerView.ItemAnimator animator = new SlideInLeftAnimator();
animator.setAddDuration(300);
recyclerView.setItemAnimator(animator);

Both libraries offer ways to enhance Android animations, but they serve different purposes. EasingInterpolator focuses on providing various easing functions for general animations, while recyclerview-animators specializes in RecyclerView-specific animations with a broader range of pre-built options and more complex functionality.

Pros of Lottie

• Supports complex animations created in Adobe After Effects
• Extensive ecosystem with tools and plugins for designers and developers
• Offers cross-platform support (Android, iOS, Web, React Native)

Cons of Lottie

• Larger library size and potential performance overhead for simple animations
• Steeper learning curve, especially for designers unfamiliar with After Effects

Code Comparison

EasingInterpolator:

EasingInterpolator interpolator = new EasingInterpolator(Ease.CUBIC_IN);
ObjectAnimator animator = ObjectAnimator.ofFloat(view, "translationX", 0, 100);
animator.setInterpolator(interpolator);
animator.start();

Lottie:

LottieAnimationView animationView = findViewById(R.id.animation_view);
animationView.setAnimation(R.raw.animation);
animationView.playAnimation();

Summary

EasingInterpolator is a lightweight library focused on easing functions for Android animations. It's simple to use and ideal for basic interpolation needs. Lottie, on the other hand, is a comprehensive animation solution that enables designers to create complex animations in After Effects and easily implement them in apps. While Lottie offers more power and flexibility, it comes with a larger footprint and potentially steeper learning curve. The choice between the two depends on the complexity of animations required and the desired workflow between designers and developers.