A java library which designed for a better Android animation experience

Animer

Animer is a java library which designed for a better Android animation experience.（Currently is more like a view animation controller)

It contains animation curves in Android iOS Origami(POP or Rebound in Client) Principle Protopie FramerJS

All these animation algorithm will be translated into Android's native implementation like DynamicAnimation & TimingInterpolator,which can improve the performance of animation.

It also provides a real-time controller & graph UI for tweaking parameters.

MonitorUI Example	Scroller Example	View Prototype

Download

dependencies {
    implementation 'com.martinrgb:animer:0.1.5.8'
}

Simple Demo 1

Simple Demo 2

Usage

Animer supports multiple ways of animating:

Android Native Style

  
// equal to Android's TimingInterpolator
Animer.AnimerSolver solver  = Animer.interpolatorDroid(new AccelerateDecelerateInterpolator(),600)

// similar to ObjectAnimator 
Animer animer = new Animer(myView,solver,Animer.TRANSLATION_Y,0,200);

animer.start();

// animer.cancel();

// animer.end();

FramerJS State Machine Style

// equal to Android's SpringAnimation
Animer.AnimerSolver solver  = Animer.springDroid(1000,0.5f);

Animer animer = new Animer();

// add a solver to Animer; 
animer.setSolver(solver);

// add value to different state;
animer.setStateValue("stateA",300);
animer.setStateValue("stateB",700);
animer.setStateValue("stateC",200);

// add a listener to observe the motion of the Animation
animer.setUpdateListener(new Animer.UpdateListener() {
    @Override
    public void onUpdate(float value, float velocity, float progress) {
      myView1.setTranslationX(value);
      myView2.setScaleX(1.f+value/100);
      myView2.setScaleY(1.f+value/100);
    }
});

// switch immediately
animer.switchToState("stateA");

// or animate to state value
// animer.animateToState("stateB");

Facebook Rebound Style

// equal to Facebook Origami POP Animation
Animer.AnimerSolver solver  = Animer.springOrigamiPOP(5,10);

Animer animer = new Animer(myView,solver,Animer.SCALE);

// setup a listener to add everything you want
animer.setUpdateListener(new Animer.UpdateListener() {
    @Override
    public void onUpdate(float value, float velocity, float progress) 
      myView.setScaleX(value);
      myView.setScaleY(value);
    }
});

animer.setCurrentValue(1.f);

boolean isScaled = false;

myView.setOnClickListener(view -> {

    if(!isScaled){
        animer.setEndValue(0.5);

    }
    else{
        animer.setEndValue(1);
    }
    isScaled = !isScaled;
});
  

Add animers to configUI

init in xml

<com.martinrgb.animer.monitor.AnConfigView
    android:id="@+id/an_configurator"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"/>

add animers' config in java

AnConfigView mAnimerConfiguratorView = (AnConfigView) findViewById(R.id.an_configurator);
AnConfigRegistry.getInstance().addAnimer("Card Scale Animation",cardScaleAnimer);
AnConfigRegistry.getInstance().addAnimer("Card TranslationX Animation",cardTransXAnimer);
mAnimerConfiguratorView.refreshAnimerConfigs();

Supported View Propertys:

Animer.TRANSLATION_X
Animer.TRANSLATION_Y
Animer.TRANSLATION_Z
Animer.SCALE // equal to SCALE_X + SCALE_Y
Animer.SCALE_X
Animer.SCALE_Y
Animer.ROTATION
Animer.ROTATION_X
Animer.ROTATION_Y
Animer.X
Animer.Y
Animer.Z
Animer.ALPHA

Supported Animators(as AnimerSolver):

Animer.springDroid(stiffness,dampingratio)                              // Android Dynamic SpringAnimation
Animer.flingDroid(velocity,friction)                                    // Android Dynamic FlingAnimation
Animer.springiOSUIView(dampingratio,duration)                           // iOS UIView SPring
Animer.springiOSCoreAnimation(stiffness,damping)                        // iOS CASpringAnimation
Animer.springOrigamiPOP(bounciness,speed)                               // Origami POP
Animer.springRK4(tension,friction)                                      // Framer-RK4
Animer.springDHO(stiffness,damping)                                     // Framer-DHO
Animer.springProtopie(tension,friction)                                 // Protopie
Animer.springPrinciple(tension,friction)                                // Principle

// Custom Bounce Interpolator(Romain Guy's DropInMotion)
Animer.interpolatorDroid(new CustomBounceInterpolator(),duration)       

// Custom Damping Interpolator(Romain Guy's DropInMotion)
Animer.interpolatorDroid(new CustomDampingInterpolator(),duration)      

// MocosSpring Interpolator (https://github.com/marcioapaiva/mocos-controlator)
Animer.interpolatorDroid(new CustomMocosSpringInterpolator(),duration)  

// Custom Spring Interpolator(https://inloop.github.io/interpolator/)
Animer.interpolatorDroid(new CustomSpringInterpolator(),duration)       

// Android Native Interpolator Below
Animer.interpolatorDroid(new PathInterpolator(),duration)               // Cubic Bezier Interpolator
...
Animer.interpolatorDroid(new DecelerateInterpolator(),duration)         // Android Decelerate Interpolator
...

TODO

• Redesign the API
• Rewrite the glsl shader
• Consider scences in activity/fragment transition
• Hook mechanism

Core concpet:

Data

• State machine concpet from FramerJS ✅
• Aniamtion converter from my Animation Converter ✅
• Support external JSON to edit animation data

Althogrim

• Physics animation concept from Rebound & Android DynamicAnimation ✅
• LookupTable Interpolation Animator + RK4 Solver + DHO Solver ✅
• Physics simulation from Flutter Physics & UIKit Dyanmic
• Momentum

Advanced Animation Setting

• Addtive animation (compose mulitple animation)
• Chained animation (one by one)
• Parallax animation (same duration but differnt transition)
• Sequencing animation (same transition but different startDelay)

User-Control

• Gesture-Driven animation,you can interact with the animation even it is animating(Like iOS's CADisplayLink Or Rebound's SetEndValue) ✅
• Package a gesture animator for interactive animation,attach gesture's velocity to animation system,make a flawess experience.
• Easy2use animation listener for controlling other element when the object is interacting or animating ✅

Performance

• Use android framework native DyanmicAniamtion And TimingInterpolator ✅
• Pre-save animation's data for less calculation
• Hardware Acceleration ✅

Design Component

• Scrollview|Scroller|PageViewer Component & Example
• Drag | DND Component & Example
• Button Component & Example
• Transition Component & Example(Maintain different element's property in state machine)
• Scroll-selector Component & Example(Scroll to fixed position)
• Swipe to delete Component & Example

Dev Tools

• Data-bind graph to modify and preview animation in application ✅
• Data-bind selctor to change animation-type in application ✅（Still has some bugs)

Utils

• AE Plugin for converting curves & revealing codes ✅（Will update GUI later)

GitHub