<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context="com.kikt.parallax.MainActivity">

    <com.kikt.reboundscrollview.ReboundScrollView
        android:id="@+id/sv_content"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:background="#f0f"
            android:orientation="vertical">

            <FrameLayout
                android:id="@+id/fl_head"
                android:layout_width="match_parent"
                android:layout_height="80dp"
                android:background="#f00">

                <ImageButton
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_gravity="center"
                    android:src="@mipmap/ic_launcher"/>
            </FrameLayout>

            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="600dp"
                android:background="#0f0"/>

            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="600dp"
                android:background="#0ff"/>

        </LinearLayout>

    </com.kikt.reboundscrollview.ReboundScrollView>

</LinearLayout>

FrameLayout mFlHead;
mSvContent.setHeaderView(mFlHead);//设置需要弹性的头布局
mSvContent.setScrollViewListener(new ObservableScrollView.ScrollViewListener() {
    @Override
    public void onScrollChanged(ObservableScrollView scrollView, int x, int y, int oldx, int oldy) {
        //滚动侦听
    }
});

mSvContent.setCloseDuration(300);//关闭动画的速率
mSvContent.setMaxHeight(200);//最大的增加高度
mSvContent.setCanRebound(false);//设定开启弹性功能与否

mSvContent.setOnAnimListener(new ReboundScrollView.OnAnimListener() {//侦听动画
    @Override
    public void onAnim(ReboundScrollView scrollView, float fraction, float height) {
        Log.d("MainActivity", "fraction:" + fraction);//下拉的百分比
        Log.d("MainActivity","height:" + height);//下拉的高度
    }
});