Question

我对我的特定程序有一点怀疑，因为它失败了，我不太清楚为什么，我有一个ExpandableListView对象来执行＆＃34; Adapter＆＃34;和一个调用此对象的片段。当显示列表的元素工作时，问题在于onChildClick我想要的是当按下列表中的项目时保存在TextView中并显示它以供稍后使用。由于这是我的程序，它现在只有当我按下另一个元素时才会从列表中选择第一个元素，应用程序停止工作而不会给我一个错误。我该怎么做才能解决这个问题？非常感谢你。

这是ExpandibleList的对象，我在其中调用getChild

$('.slick').slick({
  infinite: true,
  speed: 5000,
  slidesToShow: 1,
  centerMode: true,
  variableWidth: true,
  autoplay: true,
  autoplaySpeed: 200,
  prevArrow: '',
  nextArrow: '',
  waitForAnimate: false,
});

这就是我想要从列表中获取项目的地方。

public class ExpandableListAdapter extends BaseExpandableListAdapter {

    private Context _context;
    private List<String> _listDataHeader ;
    private HashMap<String, List<String>> _listDataChild;

    public ExpandableListAdapter(Context context, List<String> listDataHeader,
                                 HashMap<String, List<String>> listChildData) {
        this._context = context;
        this._listDataHeader = listDataHeader;
        this._listDataChild = listChildData;
    }

    @Override
    public Object getChild(int groupPosition, int childPosititon) {
        return this._listDataChild.get(this._listDataHeader.get(groupPosition))
                .get(childPosititon);
    }

    @Override
    public long getChildId(int groupPosition, int childPosition) {
        return childPosition;
    }

    @Override
    public View getChildView(int groupPosition, final int childPosition,
                             boolean isLastChild, View convertView, ViewGroup parent) {

        final String childText = (String) getChild(groupPosition, childPosition);

        if (convertView == null) {
            LayoutInflater infalInflater = (LayoutInflater) this._context
                    .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            convertView = infalInflater.inflate(R.layout.list_item, null);
        }

        TextView txtListChild = (TextView) convertView
                .findViewById(R.id.lblListItem);

        txtListChild.setText(childText);
        return convertView;
    }

    @Override
    public int getChildrenCount(int groupPosition) {
        return this._listDataChild.get(this._listDataHeader.get(groupPosition))
                .size();
    }

    @Override
    public Object getGroup(int groupPosition) {
        return this._listDataHeader.get(groupPosition);
    }

    @Override
    public int getGroupCount() {
        return this._listDataHeader.size();
    }

    @Override
    public long getGroupId(int groupPosition) {
        return groupPosition;
    }

    @Override
    public View getGroupView(int groupPosition, boolean isExpanded,
                             View convertView, ViewGroup parent) {
        String headerTitle = (String) getGroup(groupPosition);
        if (convertView == null) {
            LayoutInflater infalInflater = (LayoutInflater) this._context
                    .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            convertView = infalInflater.inflate(R.layout.list_group, null);
        }

        TextView lblListHeader = (TextView) convertView
                .findViewById(R.id.lblListHeader);
        lblListHeader.setTypeface(null, Typeface.BOLD);
        lblListHeader.setText(headerTitle);

        return convertView;
    }

    @Override
    public boolean hasStableIds() {
        return false;
    }

    @Override
    public boolean isChildSelectable(int groupPosition, int childPosition) {
        return true;
    }
}

如何使用setOnChildClickListener

显示元素

Answer 1

好的，我已经解决了这个问题。我只需要删除 // ShowItem（listDataHeader.get（childPosition））;

所以onChildClick看起来像这样：

 expListView.setOnChildClickListener(new ExpandableListView.OnChildClickListener() {

            @Override
            public boolean onChildClick(ExpandableListView parent, View v,
                                        int groupPosition, int childPosition, long id) {

                TextName.setText(listAdapter.getChild(groupPosition,childPosition).toString());

                return false;
            }
        });

如何使用setOnChildClickListener显示元素

1 个答案: