<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
    android:interpolator="@android:anim/bounce_interpolator" >
    <scale
        android:duration="500"
        android:fromXScale="0.1"
        android:fromYScale="0.1"
        android:pivotX="50%"
        android:pivotY="50%"
        android:toXScale="1.0"
        android:toYScale="1.0" />
    <alpha
        android:duration="500"
        android:fromAlpha="0"
        android:toAlpha="1.0" />
</set>

private void iniList(){
    list = new ArrayList<>();
    for (int i = 0 ; i < 30 ; i ++){
        list.add(i + " -- tween 测试 --");
    }
}
private void iniRecyclerView(){
    recyclerView = findViewById(R.id.recycler);
    GridLayoutManager manager = new GridLayoutManager(this,1);
    recyclerView.setLayoutManager(manager);
//设置动画
        LayoutAnimationController lac=new LayoutAnimationController(AnimationUtils
                .loadAnimation(this, R.anim.in_anim));
        lac.setDelay(0.5f);
        lac.setOrder(LayoutAnimationController.ORDER_RANDOM);
        recyclerView.setLayoutAnimation(lac);
    TweenRecyclerAdapter adapter = new TweenRecyclerAdapter(list);
    recyclerView.setAdapter(adapter);
}