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Code Quality Rank: L2
Programming language: Java

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README

RecyclerView Animators

Gitter

Android Arsenal License Download

RecyclerView Animators is an Android library that allows developers to easily create RecyclerView with animations.

Please feel free to use this.

Features

Demo

ItemAnimator

Adapters

How do I use it?

Setup

Gradle

On your module's build.gradle file add this implementation statement to the dependencies section:

dependencies {
  implementation 'jp.wasabeef:recyclerview-animators:3.x.x'
}

Also make sure that the repositories section includes not only jcenter but also a maven section with the "google()" endpoint.

repositories {
  google()
  jcenter()
}

ItemAnimator

Step 1

Set RecyclerView ItemAnimator.

val recyclerView = findViewById<RecyclerView>(R.id.list)
recyclerView.itemAnimator = SlideInLeftAnimator()
val recyclerView = findViewById<RecyclerView>(R.id.list)
recyclerView.itemAnimator = SlideInUpAnimator(OvershootInterpolator(1f))

Step 2

Please use the following
notifyItemChanged(int)
notifyItemInserted(int)
notifyItemRemoved(int)
notifyItemRangeChanged(int, int)
notifyItemRangeInserted(int, int)
notifyItemRangeRemoved(int, int)

If you want your animations to work, do not rely on calling notifyDataSetChanged(); as it is the RecyclerView's default behavior, animations are not triggered to start inside this method.

fun remove(position: Int) {
  dataSet.removeAt(position)
  notifyItemRemoved(position)
}

fun add(text: String, position: Int) {
  dataSet.add(position, text)
  notifyItemInserted(position)
}

Advanced Step 3

You can change the durations.

recyclerView.itemAnimator?.apply {
  addDuration = 1000
  removeDuration = 100
  moveDuration = 1000
  changeDuration = 100
}

Advanced Step 4

Change the interpolator.

recyclerView.itemAnimator = SlideInLeftAnimator().apply {
  setInterpolator(OvershootInterpolator())
}

Advanced Step 5

By implementing AnimateViewHolder, you can override preset animation. So, custom animation can be set depending on view holder.

class MyViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView), AnimateViewHolder {

  override fun preAnimateRemoveImpl(holder: RecyclerView.ViewHolder) {
    // do something
  }

  override fun animateRemoveImpl(holder: RecyclerView.ViewHolder, listener: ViewPropertyAnimatorListener) {
    ViewCompat.animate(itemView).apply {
      translationY(-itemView.height * 0.3f)
      alpha(0f)
      duration = 300
      setListener(listener)
    }.start()
  }

  override fun preAnimateAddImpl(holder: RecyclerView.ViewHolder) {
    ViewCompat.setTranslationY(itemView, -itemView.height * 0.3f)
    ViewCompat.setAlpha(itemView, 0f)
  }

  override fun animateAddImpl(holder: RecyclerView.ViewHolder, listener: ViewPropertyAnimatorListener) {
    ViewCompat.animate(itemView).apply {
      translationY(0f)
      alpha(1f)
      duration = 300
      setListener(listener)
    }.start()
  }
}

Animators

Cool

LandingAnimator

Scale

ScaleInAnimator, ScaleInTopAnimator, ScaleInBottomAnimator
ScaleInLeftAnimator, ScaleInRightAnimator

Fade

FadeInAnimator, FadeInDownAnimator, FadeInUpAnimator
FadeInLeftAnimator, FadeInRightAnimator

Flip

FlipInTopXAnimator, FlipInBottomXAnimator
FlipInLeftYAnimator, FlipInRightYAnimator

Slide

SlideInLeftAnimator, SlideInRightAnimator, OvershootInLeftAnimator, OvershootInRightAnimator
SlideInUpAnimator, SlideInDownAnimator

RecyclerView.Adapter

Step 1

Set RecyclerView ItemAnimator.

val recyclerView = findViewById<RecyclerView>(R.id.list)
recyclerView.adapter = AlphaInAnimationAdapter(MyAdapter())

Advanced Step 2

recyclerView.adapter = AlphaInAnimationAdapter(MyAdapter()).apply {
  // Change the durations.
  setDuration(1000)
  // Change the interpolator.
  setInterpolator(vershootInterpolator())
  // Disable the first scroll mode.
  setFirstOnly(false)
}

Advanced Step 3

Multiple Animations

val alphaAdapter = AlphaInAnimationAdapter(MyAdapter())
recyclerView.adapter = ScaleInAnimationAdapter(alphaAdapter)

Adapters

Alpha

AlphaInAnimationAdapter

Scale

ScaleInAnimationAdapter

Slide

SlideInBottomAnimationAdapter
SlideInRightAnimationAdapter, SlideInLeftAnimationAdapter

Applications using RecyclerView Animators

Please ping me or send a pull request if you would like to be added here.

Icon Application
Ameba Ownd
QuitNow!
AbemaTV

Developed By

Daichi Furiya (Wasabeef) - dadadada.chop@gmail.com

Contributions

Any contributions are welcome!

Contributers

Thanks

  • Inspired by AndroidViewAnimations in daimajia.

License

Copyright 2018 Wasabeef

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

   http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.


*Note that all licence references and agreements mentioned in the recyclerview-animators README section above are relevant to that project's source code only.