将焦点集中在ExpandableListView中的扩展组上 [英] Save focus on expanded group in ExpandableListView

问题描述

我在NavigationDrawer中具有ExpandableListview.当组展开时，我折叠了以前的展开组，但是当组折叠时，展开的组失去了焦点(ExpandableListview的位置下降了).这是代码:

I have ExpandableListview inside NavigationDrawer. When group is expanded I collapse the previous expanded group, but when group is collapsed expanded group loses the focus (position of ExpandableListview goes down). Here's the code:

@Override
public boolean onGroupClick(ExpandableListView expandableListView, View view, int i, long l) {

    if (mListView.isGroupExpanded(i)) {
        mListView.collapseGroupWithAnimation(i);
    } else {

        mListView.expandGroupWithAnimation(i);
        if(i!=lastExpandedGroupPosition )
            mListView.collapseGroupWithAnimation(lastExpandedGroupPosition);

        lastExpandedGroupPosition = i;
    }

     return true;
}

推荐答案

在扩展列表时，将函数 setSelectedGroup(groupPosition)与 expandablelistview 对象一起使用.这将为该组设置焦点，您单击的是谁的视图！快乐的编码:)

Use the function setSelectedGroup(groupPosition) with the expandablelistview object while expanding the list. This would set the focus for the group , who's view you had clicked! Happy coding :)

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