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AbsListView.OnScrollListener

版本：Android 2.3 r1

结构

继承关系

public static classAbsListView.OnScrollListener

android.widget.AbsListView.OnScrollListener

概述

为了在列表或网格滚动时执行回调函数而定义的接口。

常量

public static final int SCROLL_STATE_FLING

用户之前通过触控滚动并执行了快速滚动。滚动动画正滑向停止点。

常量值：2 (0x00000002)

public static final int SCROLL_STATE_IDLE

视图没有滚动。注意，使用轨迹球滚动时，在滚动停止之前，一直处于空闲状态。

常量值：0 (0x00000000)

public static final int SCROLL_STATE_TOUCH_SCROLL

用户通过触控滚动，并且手指没有离开屏幕。

常量值：1 (0x00000001)

公共方法

public abstract voidonScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount)

当列表或网格的滚动已经完成时调用的回调函数。会在滚动完成后调用。

参数

view报告滚动状态的对象视图。

firstVisibleItem第一个可见单元格的索引（如果visibleItemCount == 0则忽略该参数）。

visibleItemCount可见单元格数。

totalItemCount列表适配器中的条目数。

public abstract voidonScrollStateChanged(AbsListView view, int scrollState)

当列表视图或网格视图正在滚动是执行的回调函数。如果视图正在滚动，该方法会在渲染下一帧之前调用该方法。就是说，会在调用任何getView(int, View, ViewGroup)方法之前调用。

参数

view报告滚动状态的对象视图。

scrollState当前滚动状态。值为SCROLL_STATE_IDLE、SCROLL_STATE_TOUCH_SCROLL或SCROLL_STATE_IDLE。
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