Android仿IOS回弹效果支持任何控件

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);// HorizontalOverScrollDecoratorHelper.setUpOverScroll(recyclerView, OverScrollDecoratorHelper.ORIENTATION_HORIZONTAL);// VerticalOverScrollDecoratorHelper.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);  // HorizontalOverScrollDecoratorHelper.setUpStaticOverScroll(view, OverScrollDecoratorHelper.ORIENTATION_HORIZONTAL);// VerticalOverScrollDecoratorHelper.setUpStaticOverScroll(view, OverScrollDecoratorHelper.ORIENTATION_VERTICAL);

高级用法

// Horizontal RecyclerViewRecyclerView 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));// ViewPagerViewPager viewPager = (ViewPager) findViewById(R.id.view_pager);new HorizontalOverScrollBounceEffectDecorator(new ViewPagerOverScrollDecorAdapter(viewPager));// A simple TextView - horizontalView 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 adapternew 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 softlynew 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：Android仿IOS回弹效果

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。

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