本文实例为大家分享了Android仿IOS回弹效果的具体代码，供大家参考，具体内容如下

效果图:

导入依赖:

dependencies {

// ...

compile 'me.everything:overscroll-decor-android:1.0.4'

}

RecyclerView

支持线性布局和网格布局管理器(即所有原生Android布局)。可以轻松适应支持自定义布局管理器。

RecyclerView recyclerView = (RecyclerView) findViewById(R.id.recycler_view);

// Horizontal

OverScrollDecoratorHelper.setUpOverScroll(recyclerView, OverScrollDecoratorHelper.ORIENTATION_HORIZONTAL);

// Vertical

OverScrollDecoratorHelper.setUpOverScroll(recyclerView, OverScrollDecoratorHelper.ORIENTATION_VERTICAL);

ListView

ListView listView = (ListView) findViewById(R.id.list_view);

OverScrollDecoratorHelper.setUpOverScroll(listView);

GridView

GridView gridView = (GridView) findViewById(R.id.grid_view);

OverScrollDecoratorHelper.setUpOverScroll(gridView);

ViewPager

ViewPager viewPager = (ViewPager) findViewById(R.id.view_pager);

OverScrollDecoratorHelper.setUpOverScroll(viewPager);

ScrollView, HorizontalScrollView

ScrollView scrollView = (ScrollView) findViewById(R.id.scroll_view);

OverScrollDecoratorHelper.setUpOverScroll(scrollView);

HorizontalScrollView horizontalScrollView = (HorizontalScrollView) findViewById(R.id.horizontal_scroll_view);

OverScrollDecoratorHelper.setUpOverScroll(horizontalScrollView);

Any View - Text, Image…

View view = findViewById(R.id.demo_view);

// Horizontal

OverScrollDecoratorHelper.setUpStaticOverScroll(view, OverScrollDecoratorHelper.ORIENTATION_HORIZONTAL);

// Vertical

OverScrollDecoratorHelper.setUpStaticOverScroll(view, OverScrollDecoratorHelper.ORIENTATION_VERTICAL);

高级用法

// Horizontal RecyclerView

RecyclerView recyclerView = (RecyclerView) findViewById(R.id.recycler_view);

new HorizontalOverScrollBounceEffectDecorator(new RecyclerViewOverScrollDecorAdapter(recyclerView));

// ListView (vertical)

ListView listView = (ListView) findViewById(R.id.list_view);

new VerticalOverScrollBounceEffectDecorator(new AbsListViewOverScrollDecorAdapter(listView));

// GridView (vertical)

GridView gridView = (GridView) findViewById(R.id.grid_view);

new VerticalOverScrollBounceEffectDecorator(new AbsListViewOverScrollDecorAdapter(gridView));

// ViewPager

ViewPager viewPager = (ViewPager) findViewById(R.id.view_pager);

new HorizontalOverScrollBounceEffectDecorator(new ViewPagerOverScrollDecorAdapter(viewPager));

// A simple TextView - horizontal

View textView = findViewById(R.id.title);

new HorizontalOverScrollBounceEffectDecorator(new StaticOverScrollDecorAdapter(view));

RecyclerView 使用 ItemTouchHelper 进行拖动

从版本1.0.1起，效果可以与RecyclerView内置的滑动机制(基于ItemTouchHelper)平滑运行。但是，还需要一些很少显式的配置工作：

// Normally you would attach an ItemTouchHelper & a callback to a RecyclerView, this way:

RecyclerView recyclerView = (RecyclerView) findViewById(R.id.recycler_view);

ItemTouchHelper.Callback myCallback = new ItemTouchHelper.Callback() {

...

};

ItemTouchHelper myHelper = new ItemTouchHelper(myCallback);

myHelper.attachToRecyclerView(recyclerView);

// INSTEAD of attaching the helper yourself, simply use the dedicated adapter

new VerticalOverScrollBounceEffectDecorator(new RecyclerViewOverScrollDecorAdapter(recyclerView, myCallback));

滚动状态改变回调

// Note: over-scroll is set-up using the helper method.

IOverScrollDecor decor = OverScrollDecoratorHelper.setUpOverScroll(recyclerView, OverScrollDecoratorHelper.ORIENTATION_HORIZONTAL);

decor.setOverScrollStateListener(new IOverScrollStateListener() {

@Override

public void onOverScrollStateChange(IOverScrollDecor decor, int oldState, int newState) {

switch (newState) {

case STATE_IDLE:

// No over-scroll is in effect.

break;

case STATE_DRAG_START_SIDE:

// Dragging started at the left-end.

break;

case STATE_DRAG_END_SIDE:

// Dragging started at the right-end.

break;

case STATE_BOUNCE_BACK:

if (oldState == STATE_DRAG_START_SIDE) {

// Dragging stopped -- view is starting to bounce back from the *left-end* onto natural position.

} else { // i.e. (oldState == STATE_DRAG_END_SIDE)

// View is starting to bounce back from the *right-end*.

}

break;

}

}

}

拖拽出View原本范围时回调

当前拖拽的强度(偏移量)

// Note: over-scroll is set-up by explicity instantiating a decorator rather than using the helper; The two methods can be used interchangeably for registering listeners.

VerticalOverScrollBounceEffectDecorator decor = new VerticalOverScrollBounceEffectDecorator(new RecyclerViewOverScrollDecorAdapter(recyclerView, itemTouchHelperCallback));

decor.setOverScrollUpdateListener(new IOverScrollUpdateListener() {

@Override

public void onOverScrollUpdate(IOverScrollDecor decor, int state, float offset) {

final View view = decor.getView();

if (offset > 0) {

// 'view' is currently being over-scrolled from the top.

} else if (offset < 0) {

// 'view' is currently being over-scrolled from the bottom.

} else {

// No over-scroll is in-effect.

// This is synonymous with having (state == STATE_IDLE).

}

}

});

自定义控件

public class CustomView extends View {

// ...

}

final CustomView view = (CustomView) findViewById(R.id.custom_view);

new VerticalOverScrollBounceEffectDecorator(new IOverScrollDecoratorAdapter() {

@Override

public View getView() {

return view;

}

@Override

public boolean isInAbsoluteStart() {

// canScrollUp() is an example of a method you must implement

return !view.canScrollUp();

}

@Override

public boolean isInAbsoluteEnd() {

// canScrollDown() is an example of a method you must implement

return !view.canScrollDown();

}

});

拖拽强度和回弹效果配置

/// Make over-scroll applied over a list-view feel more 'stiff'

new VerticalOverScrollBounceEffectDecorator(new AbsListViewOverScrollDecorAdapter(view),

5f, // Default is 3

VerticalOverScrollBounceEffectDecorator.DEFAULT_TOUCH_DRAG_MOVE_RATIO_BCK,

VerticalOverScrollBounceEffectDecorator.DEFAULT_DECELERATE_FACTOR);

// Make over-scroll applied over a list-view bounce-back more softly

new VerticalOverScrollBounceEffectDecorator(new AbsListViewOverScrollDecorAdapter(view),

VerticalOverScrollBounceEffectDecorator.DEFAULT_TOUCH_DRAG_MOVE_RATIO_FWD,

VerticalOverScrollBounceEffectDecorator.DEFAULT_TOUCH_DRAG_MOVE_RATIO_BCK,

-1f // Default is -2

);

禁用回弹效果和开启回弹效果

IOverScrollDecor decor = OverScrollDecoratorHelper.setUpOverScroll(view);

// Detach. You are strongly encouraged to only call this when overscroll isn't

// in-effect: Either add getCurrentState()==STATE_IDLE as a precondition,

// or use a state-change listener.

decor.detach();

// Attach.

decor.attach();

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。