ExpandableLayout 源码分析

https://github.com/AAkira/ExpandableLayout

带阻尼震动的效果,原来使用的是AnticipateInterpolator，差值器。

ExpandableLinearLayout

https://github.com/traex/ExpandableLayout

简介：ExpandableLayout代码量很少223行，思路清楚。值得推荐啊。

animation = new Animation()
{
    @Override
    protected void applyTransformation(float interpolatedTime, Transformation t)
    { //16ms调用一次  
//interpolatedTime 为0到1之间的值
        if (interpolatedTime == 1)            isOpened = true;        v.getLayoutParams().height = (interpolatedTime == 1) ? LayoutParams.WRAP_CONTENT : (int) (targetHeight * interpolatedTime);        v.requestLayout();    }    @Override    public boolean willChangeBounds() {        return true;    }};animation.setDuration(duration);v.startAnimation(animation);

ExpandableLayout集成Relativelayout. 布局文件：

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
                android:layout_width="match_parent"
                android:layout_height="wrap_content">
    <FrameLayout
        android:id="@+id/view_expandable_headerlayout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"/>

    <FrameLayout
        android:id="@+id/view_expandable_contentLayout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@+id/view_expandable_headerlayout"/>

</RelativeLayout>