ExpandableListView 不能自动滚动

Question

我已经在这个问题上苦苦挣扎了很长时间了。我有 5 个可扩展的列表视图，其中包含一周中每一天的信息，我可以在它们之间滑动。一切正常，除了当我开始活动时，我希望当前列表视图自动向下滚动（而不是用户）到当天。而且..什么也没发生。

SSCCE：

public void Test()
            {

                for (int i = 0; i < this.numberOfWeeks; i++)
                {
                     // Relative layout to represent the current visible area
                     RelativeLayout screen = new RelativeLayout(this);

                     //LayoutParameters for the screen, fills the whole screen
                     RelativeLayout.LayoutParams newParams = new RelativeLayout.LayoutParams(
                     RelativeLayout.LayoutParams.FillParent, RelativeLayout.LayoutParams.FillParent);
                     screen.Id = 1000;
                     screen.LayoutParameters = newParams;


                     //An ExpandableListView is created with some parameters not important for this example
                     ExpandableListView newEListView = this.CreateExpandableListView( //..params..// )

                     screen.AddView(newEListView);

                     // Set this newEListView to the array of expandablelistviews
                     this.expandableListViews[i] = newEListView;
                }

                // Some more stuff is done, and finally when data is loaded and everything shows up just fine..
                // Lets make it automatically scroll down to the current day!

                // This does nothing
                this.expandableListViews[3].SetSelection(4); // 4 is current day

                // Same here
                this.expandableListViews[3].SetSelectionFromTop(4, 200);

            }

值得一提的是，手动滚动效果很好..

Answer 1

SetSelection 不能以这种方式工作，您可能正在尝试的替代方法是

mexpandableList.smoothScrollToPosition(groupPosition);

如果需要，设置所选行的背景颜色，使其看起来突出显示。

Answer 2

试试setSelectedGroup 方法。