recyclerview-animators README

The project's README from github.com/wasabeef/recyclerview-animators. As one markdown file: README.md.

RecyclerView Animators

Android Arsenal License Maven Central

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 {
  // Kotlin
  implementation 'jp.wasabeef:recyclerview-animators:4.0.2'
}

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

repositories {
  google()
  mavenCentral()
  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) {
    itemView.animate().apply {
      translationY(-itemView.height * 0.3f)
      alpha(0f)
      duration = 300
      setListener(listener)
    }.start()
  }

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

  override fun animateAddImpl(holder: RecyclerView.ViewHolder, listener: ViewPropertyAnimatorListener) {
    itemView.animate().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())

Java

RecyclerView recyclerView = findViewById(R.id.list);
recyclerView.setAdapter(new 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)
}

Java

AlphaInAnimationAdapter alphaInAnimationAdapter = new AlphaInAnimationAdapter(new MyAdapter());
alphaInAnimationAdapter.setDuration(1000);
alphaInAnimationAdapter.setInterpolator(new OvershootInterpolator());
alphaInAnimationAdapter.setFirstOnly(false);

Advanced Step 3

Multiple Animations

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

Java

recyclerView.setAdapter(new ScaleInAnimationAdapter(alphaInAnimationAdapter));

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
CL

Developed By

Daichi Furiya (Wasabeef) - [email protected]

Follow me on Twitter

Contributions

Any contributions are welcome!

Contributers

Thanks

License

Copyright 2020 Daichi Furiya / 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.

recyclerview-animators (wasabeef/recyclerview-animators)

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11.5K ·GitHub
Recyclerview-animators
What is this?RecyclerView Animators is an Android library that lets you easily add animations to items in a RecyclerView, both for the ItemAnimator (add/remove animations) and for item appearance animations via wrapped Adapters.
Is this a standalone app or a library I add to my project?It's a Kotlin/Java library you add as a Gradle dependency to an existing Android app; it's not a standalone application.
How do I add it to my project?Add the implementation statement to your module's build.gradle dependencies, and make sure your repositories section includes mavenCentral() and the google() endpoint.
Do I need anything beyond a normal Android/Gradle setup?No special tooling is required beyond a standard Android Gradle project with mavenCentral() and google() repositories configured.
Does calling notifyDataSetChanged() trigger the animations?No. You must use granular notify methods like notifyItemChanged/Inserted/Removed (or their range variants); calling notifyDataSetChanged() is RecyclerView's default and won't trigger the animations.
What two ways can I apply animations, ItemAnimator or Adapter?You can set a custom ItemAnimator (like ScaleInAnimator, FadeInAnimator, FlipInTopXAnimator, SlideInLeftAnimator) on the RecyclerView for add/remove transitions, or wrap your RecyclerView.Adapter with an Adapter decorator (like AlphaInAnimationAdapter, ScaleInAnimationAdapter, SlideInBottomAnimationAdapter) for item appearance animations.
Can I customize the animation duration or interpolator?Yes, both the animation duration and the interpolator used by the ItemAnimator can be changed.
Can I write a fully custom animation instead of using the presets?Yes, by implementing AnimateViewHolder on your view holder you can override the preset animation and define custom animations per view holder.
Who uses this library?Apps like Ameba Ownd, QuitNow!, and AbemaTV are listed as applications using RecyclerView Animators.
What are similar projects?BaseRecyclerViewAdapterHelper, MPAndroidChart, MaterialDrawer, banner, material-dialogs, uCrop, AndroidViewAnimations, GSYVideoPlayer
Which topics is it in?android-library, kotlin, ui-components, animation, java, mobile, android, gui, apache-2.0, library, developer-tools, open-source
Creator
wasabeef
Size
66.2 MB
Stars
11.5K
Updated
CommitFeb 14
Age
11y
Commits · 90 Days