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);

// 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();

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。