OverScroll

Use CoordinatorLayout+Behavior to achieve elastic scrolling and inertial scrolling (similar to WeChat homepage).

利用CoordinatorLayout+Behavior实现弹性滚动和惯性滚动效果(类似微信首页).

Usage 用法

Gradle

allprojects {
    repositories {
        ...
        maven { url 'https://jitpack.io' }
    }
}
 
dependencies {
    implementation 'com.github.1993hzw:OverScroll:1.1.1'
}

In your layout.xml:

在xml布局文件中添加类似代码:

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    ...

    <cn.forward.overscroll.view.OverScrollVerticalRecyclerView
        android:background="#0ff"
        android:id="@+id/overscroll_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

    ...

</android.support.design.widget.CoordinatorLayout>

You can use OverScrollHorizontalRecyclerView, OverScrollVerticalRecyclerView or OverScrollScrollView inside CoordinatorLayout.

当然你可以在CoordinatorLayout中使用OverScrollHorizontalRecyclerView, OverScrollVerticalRecyclerView 或 OverScrollScrollView．

Now, your layout achieve elastic scrolling and inertial scrolling!

现在你的布局就实现了弹性滚动和惯性滚动效果啦！

Extend 拓展

You can set IOverScrollCallback or add IOffsetChangeListener, if you want to achieve more complex interactions.

你还可以拓展该控件以实现更复杂的交互效果，设置 IOverScrollCallback 或者添加 IOffsetChangeListener.

IOverScrollView overScrollView = findViewById(R.id.overscroll_view);
overScrollView.setOverScrollCallback(new IOverScrollCallback() {
    @Override
    public boolean canScroll(IOverScroll overScroll, View child, int scrollDirection) {
       ...
    }

    @Override
    public int getMaxFlingOffset(IOverScroll overScroll, View child, int scrollDirection) {
        ...
    }

    @Override
    public float getDampingFactor(IOverScroll overScroll, View child, int scrollDirection) {
        ...
    }

    @Override
    public int getMinFlingVelocity(IOverScroll overScroll, View child, int scrollDirection) {
        ...
    }

    @Override
    public void onOffsetChanged(IOverScroll overScroll, View child, int offset) {
        ...
    }

    @Override
    public boolean onSpringBack(IOverScroll overScroll, View child) {
        ...
    }

    @Override
    public void onStopSpringingBack(IOverScroll overScroll, View child) {
        ...
    }
});

overScrollView.addOffsetChangeListener(new IOffsetChangeListener() {
    @Override
    public void onOffsetChanged(View child, int offset) {
        ...
    }
});

(The default IOverScrollCallback is SimpleOverScrollCallback)

(默认IOverScrollCallback接口的实现为SimpleOverScrollCallback)

Article 文章

• 类似微信首页弹性滚动和惯性滚动效果的实现——OverScroll

• OverScroll弹性滚动和惯性滚动效果的实现原理——CoordinatorLayout+Behavior