RecyclerView的进场动画、点击动画

下面图片即为本次的运行效果：

1.进场动画是在viewholder中的onViewAttachedToWindow（）中添加动画即可，动画的代码：

private ScaleInAnimation mSelectAnimation = new ScaleInAnimation();

@Override
    public void onViewAttachedToWindow(DiffVH holder) {
        super.onViewAttachedToWindow(holder);
        addAnimation(holder);
    }

private void addAnimation(DiffVH holder) {
        for (Animator anim : mSelectAnimation.getAnimators(holder.itemView)) {
            anim.setDuration(300).start();
            anim.setInterpolator(new LinearInterpolator());
        }
    }

ScaleInAnimation.java:

import android.animation.Animator;
import android.animation.ObjectAnimator;
import android.view.View;

public class ScaleInAnimation{
    private static final float DEFAULT_SCALE_FROM = .5f;
    private final float mFrom;

    public ScaleInAnimation() {
        this(DEFAULT_SCALE_FROM);
    }

    public ScaleInAnimation(float from) {
        mFrom = from;
    }

    public Animator[] getAnimators(View view) {
        ObjectAnimator scaleX = ObjectAnimator.ofFloat(view, "scaleX", mFrom, 1f);
        ObjectAnimator scaleY = ObjectAnimator.ofFloat(view, "scaleY", mFrom, 1f);
        return new ObjectAnimator[]{scaleX, scaleY};
    }
}

2.每个item的点击效果是一个自定义view，具体看BamLinearLayout.java

使用的话直接在xml中引用即可：

<com.example.diffut.BamLinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="120dp"
    android:layout_marginBottom="1dp"
    android:padding="5dp"
    android:background="@mipmap/background"
    android:orientation="vertical">

    <TextView
        android:id="@+id/tv1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="22sp"
        android:textStyle="bold"
        tools:text="第一个" />

    <TextView
        android:id="@+id/tv2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="24sp"
        android:textStyle="bold"
        tools:text="我的存在只为了证明定向刷新中的定向刷新" />

    <com.example.diffut.TextSwitchView
        android:id="@+id/switchView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

</com.example.diffut.BamLinearLayout>

完整的项目地址：

https://github.com/buder-cp/base_component_learn/tree/master/diffut