Android View源码解析

/**
* Always allow a user to over-scroll this view, provided it is a
* view that can scroll.
*
* @see #getOverScrollMode()
* @see #setOverScrollMode(int)
*/
public static final int OVER_SCROLL_ALWAYS = 0;

/**
* Allow a user to over-scroll this view only if the content is large
* enough to meaningfully scroll, provided it is a view that can scroll.
*
* @see #getOverScrollMode()
* @see #setOverScrollMode(int)
*/
public static final int OVER_SCROLL_IF_CONTENT_SCROLLS = 1;

/**
* Never allow a user to over-scroll this view.
*
* @see #getOverScrollMode()
* @see #setOverScrollMode(int)
*/
public static final int OVER_SCROLL_NEVER = 2;

/**
* Set the over-scroll mode for this view. Valid over-scroll modes are
* {@link #OVER_SCROLL_ALWAYS} (default), {@link #OVER_SCROLL_IF_CONTENT_SCROLLS}
* (allow over-scrolling only if the view content is larger than the container),
* or {@link #OVER_SCROLL_NEVER}.
*
* Setting the over-scroll mode of a view will have an effect only if the
* view is capable of scrolling.
*
* @param overScrollMode The new over-scroll mode for this view.
*/

public void setOverScrollMode (int mode)

为视图设置过滚动模式。有效的过滚动模式有 OVER_SCROLL_ALWAYS（默认值）、 OVER_SCROLL_IF_CONTENT_SCROLLS（视图内容大于容器时允许过滚动）、和 OVER_SCROLL_NEVER. 只有当视图可以滚动时，才可以设置视图的过滚动模式.

参数

mode 视图的新的过滚动模式

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