是否有GridView控件setSelectionFromTop（INT位置，int y）对方法 [英] Does have GridView setSelectionFromTop (int position, int y) method

问题描述

我试图调用方法公共无效setSelectionFromTop（INT位置，int y）对这据此文档中 AbsListView 自阿比1 <一个href=\"http://developer.android.com/reference/android/widget/AbsListView.html#setSelectionFromTop(int,%20int)\"相对=nofollow> setSelectionFromTop
网格视图扩展AbsListView 公共类GridView的扩展AbsListView 所以这个方法应该在那里。
但我发现了异常运行时 java.lang.NoSuchMethodError
什么奇怪的是，这种方法适用于的ListView 这也延伸 AbsListView 公共类的ListView扩展AbsListView

I'm trying to call method public void setSelectionFromTop (int position, int y) which accordingly to documentation is defined in AbsListView since Api 1 setSelectionFromTop Grid View extends AbsListView public class GridView extends AbsListView so this method should be there. But I'm getting Runtime Exception java.lang.NoSuchMethodError What is strange that this method works for ListView which also extends AbsListView public class ListView extends AbsListView

谁能解释一下我这样的行为？

Who can explain me such behavior?

添加

下面是我的code mGridView.setSelectionFromTop（0，scrollHeight属性 - mParallaxViewHeight）; IDE警告我THA这种方法只在21 API提供

Here is my code mGridView.setSelectionFromTop(0, scrollHeight - mParallaxViewHeight); IDE warns me tha this method is only available in API 21

推荐答案

调用setSelectionFromTop之前投放到GridView的

Cast it to GridView before calling setSelectionFromTop

((GridView) absListView).setSelectionFromTop(...)

或者，如果它是列表视图：

Or if it is Listview:

((ListView) absListView).setSelectionFromTop(...)

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