ExpandableListview - 当单击另一个项目时，如何关闭先前打开的项目？

Question

如果在expandablelistview上点击了其他项目，如何关闭之前打开的项目？

我参考本教程http://www.androidhive.info/2013/07/android-expandable-list-view-tutorial/ 但是当我点击新项目时，prevoius项目将不会关闭。

Answer 1

因此，您一次只需要一个（或零）扩展组。对？当您展开另一个组时，以下代码将关闭先前展开的组。试试吧。

你去吧

final int[] prevExpandPosition = {-1};
    expandableListView.setOnGroupExpandListener(new ExpandableListView.OnGroupExpandListener() {
        @Override
        public void onGroupExpand(int groupPosition) {
            if (prevExpandPosition[0] >= 0 && prevExpandPosition[0] != groupPosition) {
                expandableListView.collapseGroup(prevExpandPosition[0]);
            }
            prevExpandPosition[0] = groupPosition;
        }
    });

Answer 2

您可以实施ExpandableListView.OnGroupClickListener，您需要为所有列表组调用collapseGroup()，但点击的列表组除外：

  expandableList.setOnGroupExpandListener(new OnGroupExpandListener() {
    int previousGroup = -1;

    @Override
    public void onGroupExpand(int groupPosition) {
        if(groupPosition != previousGroup)
            expandableList.collapseGroup(previousGroup);
        previousGroup = groupPosition;
    }
});

Answer 3

        expandableList.setOnGroupExpandListener(new ExpandableListView.OnGroupExpandListener() {
        int previousGroup = -1;

        @Override
        public void onGroupExpand(int groupPosition) {
            if(groupPosition != previousGroup)
                expandableList.collapseGroup(previousGroup);
            previousGroup = groupPosition;
        }
    });