今天给大家推荐一款酷炫的RecyclerView库，只要几句代码，就可以给RecyclerView的Item添加酷炫的动画。
效果图

1. ItemAnimator

demo1.gif

demo2.gif

demo3.gif

2. Adapters

   
   
   demo4.gif

demo5.gif

使用方法

1. 添加依赖

dependencies {
  // jCenter
  compile 'jp.wasabeef:recyclerview-animators:2.2.7'
}

2. 添加动画有两种方式，第一种是添加ItemAnimator动画，第二种请参见第3点
   （1）设置RecyclerView的ItemAnimator

RecyclerView recyclerView = (RecyclerView) findViewById(R.id.list);
recyclerView.setItemAnimator(new SlideInLeftAnimator());

或者

RecyclerView recyclerView = (RecyclerView) findViewById(R.id.list);
SlideInUpAnimator animator = new SlideInUpAnimator(new OvershootInterpolator(1f));  //相比于第一种，第二种为SlideInUpAnimator添加插值器
recyclerView.setItemAnimator(animator);

（2）请勿直接使用notifyDataSetChanged()方法
建议采用一下方法取代notifyDataSetChanged()，如果直接使用notifyDataSetChanged()方法，则动画无法触发

notifyItemChanged(int)
notifyItemInserted(int)
notifyItemRemoved(int)
notifyItemRangeChanged(int, int)
notifyItemRangeInserted(int, int)
notifyItemRangeRemoved(int, int)

（3）设置动画时长

recyclerView.getItemAnimator().setAddDuration(1000);
recyclerView.getItemAnimator().setRemoveDuration(1000);
recyclerView.getItemAnimator().setMoveDuration(1000);
recyclerView.getItemAnimator().setChangeDuration(1000);

（4）添加插值器

SlideInLeftAnimator animator = new SlideInLeftAnimator();
animator.setInterpolator(new OvershootInterpolator());
// or recyclerView.setItemAnimator(new SlideInUpAnimator(new OvershootInterpolator(1f)));
recyclerView.setItemAnimator(animator);

（5）在ViewHolder实现AnimateViewHolder接口

static class MyViewHolder extends RecyclerView.ViewHolder implements AnimateViewHolder {
  public MyViewHolder(View itemView) {
    super(itemView);
  }

  @Override
  public void preAnimateRemoveImpl(RecyclerView.ViewHolder holder) {

  }

  @Override
  public void animateRemoveImpl(RecyclerView.ViewHolder holder, ViewPropertyAnimatorListener listener) {
    ViewCompat.animate(itemView)
          .translationY(-itemView.getHeight() * 0.3f)
          .alpha(0)
          .setDuration(300)
          .setListener(listener)
          .start();
  }

  @Override
  public void preAnimateAddImpl(RecyclerView.ViewHolder holder) {
    ViewCompat.setTranslationY(itemView, -itemView.getHeight() * 0.3f);
    ViewCompat.setAlpha(itemView, 0);
  }

  @Override
  public void animateAddImpl(RecyclerView.ViewHolder holder, ViewPropertyAnimatorListener listener) {
    ViewCompat.animate(itemView)
          .translationY(0)
          .alpha(1)
          .setDuration(300)
          .setListener(listener)
          .start();
  }
}

2. 通过设置RecyclerView.Adapter添加动画
   （1）设置ItemAnimator

RecyclerView recyclerView = (RecyclerView) findViewById(R.id.list);
MyAdapter adapter = new MyAdapter();
recyclerView.setAdapter(new AlphaInAnimationAdapter(adapter));

（2）设置动画时长

MyAdapter adapter = new MyAdapter();
AlphaInAnimationAdapter alphaAdapter = new AlphaInAnimationAdapter(adapter);
alphaAdapter.setDuration(1000);
recyclerView.setAdapter(alphaAdapter);

（3）设置插值器

MyAdapter adapter = new MyAdapter();
AlphaInAnimationAdapter alphaAdapter = new AlphaInAnimationAdapter(adapter);
alphaAdapter.setInterpolator(new OvershootInterpolator());
recyclerView.setAdapter(alphaAdapter);

（4）取消第一次滑动模式

MyAdapter adapter = new MyAdapter();
AlphaInAnimationAdapter alphaAdapter = new AlphaInAnimationAdapter(adapter);
scaleAdapter.setFirstOnly(false);
recyclerView.setAdapter(alphaAdapter);

（5）多重动画（可选）

MyAdapter adapter = new MyAdapter();
AlphaInAnimationAdapter alphaAdapter = new AlphaInAnimationAdapter(adapter);
recyclerView.setAdapter(new ScaleInAnimationAdapter(alphaAdapter));

更多详细使用方法请参考其GitHub。