仿IOS回弹效果支持任何控件
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() {@Overridepublic 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() {@Overridepublic 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() {@Overridepublic View getView() {return view;}@Overridepublic boolean isInAbsoluteStart() {// canScrollUp() is an example of a method you must implementreturn !view.canScrollUp();}@Overridepublic boolean isInAbsoluteEnd() {// canScrollDown() is an example of a method you must implementreturn !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 3VerticalOverScrollBounceEffectDecorator.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();
源码地址:https://github.com/overscroll-decor
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