为什么OnGroupClick重绘ExpandableList [英] Why OnGroupClick redraws the ExpandableList

问题描述

我是新来的Andr​​oid。

I am new to Android.

我有一个 ExpandableListView ，在那里我已经成功地突出（永久）所选择的项目/子。但是，当我点击/摸组，突出显示的项目将消失，好像名单已重画。在 onGroupClick ，我尽量保持突出显示的项目突出，但即使如此，它重绘列表。

I have a ExpandableListView, where I have managed to highlight (persistent) the selected item/child. But when I click/touch the group, the highlighted item goes away and seems like list has been redrawn. In onGroupClick, I am try to keep the highlighted item highlighted, but even then it redraws the list.

    @Override
public boolean onGroupClick(ExpandableListView parent, View v,
        int groupPosition, long id) {
    // TODO keepSelectedModuleHighlited. Right now its not working.
    if (parent.isGroupExpanded(groupPosition)) {
        parent.collapseGroup(groupPosition);
    } else {
        parent.expandGroup(groupPosition);
    }

    keepSelectedModuleHighlited();

    return true;
}

和方法：keepSelectedModuleHighlited

And method : keepSelectedModuleHighlited

    private void keepSelectedModuleHighlited() {
    if (lastSelectedView != null && lastSelectedDrawble != null) {
        lastSelectedView.setBackgroundDrawable(this.getResources()
                .getDrawable(R.drawable.module_selected));
    }

}

我怎样才能把我的方法只是后重绘列表？任何想法？

How can I put my method just after it redraws the list? Any Idea?

推荐答案

由于当Android的重绘列表，它会调用 getChildView（）在 ExpandableListAdapter ，你需要把你的高亮code在 getChildView（）。

Since when Android "redraws the list", it calls getChildView() on your ExpandableListAdapter, you need to put your highlighting code in getChildView().

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