Question

我试图在用户触摸可扩展列表视图中的子项时设置背景颜色。我设法通过使用此代码来完成此操作：

ArrayList<ChildView> childViewList;

ExpandableListView expandablelistview_options = (ExpandableListView) view.findViewById(R.id.expandablelistview_options);

expandablelistview_options.setOnChildClickListener(new ExpandableListView.OnChildClickListener() {

@Override
public boolean onChildClick(ExpandableListView parent, View v, int groupPosition, int childPosition, long id)
{
    int index = removeChildView(groupPosition);
    ArrayList<ConciergeOptionsPairs> children=data.Options.get(groupPosition).childrens;

    if (index != childPosition)
    {
        v.setBackgroundColor(ContextCompat.getColor(getActivity(),R.color.orange));
        v.invalidate();
        addChildView(new ChildView(groupPosition, childPosition, v, children.get(childPosition)));
    }

    return false;
}
});

private int removeChildView(int groupPosition)
    {
        int index = 0;
        int childpos = 0;
        boolean exists = false;
        for (ChildView c : childViewList)
        {
            if (c.groupPosition == groupPosition)
            {
                c.view.setBackgroundColor(ContextCompat.getColor(getActivity(),R.color.transparent));
                c.view.invalidate();
                childpos = c.childPosition;
                exists = true;
                break;
            }
            index++;
        }

        if (exists)
        {
            childViewList.remove(index);
            return childpos;
        }

        return -1;
    }

private void addChildView(ChildView child)
{
    childViewList.add(child);
}

除了这种奇怪的行为外，一切正常：

我有2组视图，如果我扩展第二组，选择第二个孩子，然后展开第一个组，第一组的第一个孩子的背景变色，第二个组的孩子的背景得到透明的。

当我在没有选择任何孩子的情况下扩展第一组时：

如果我折叠第一组，第二组孩子的背景会再次变色。

这是我的ExpandableListView适配器代码：

public class ConciergeOptionsExpandableListAdapter extends BaseExpandableListAdapter
{
    private Context context;
    private ArrayList<ConciergeOptions> data;
    private HotelStay hotelStay;
    private int lastExpandedGroupPosition;

    public ConciergeOptionsExpandableListAdapter(Context context, ArrayList<ConciergeOptions> data) {
        this.context = context;
        this.data = data;
        hotelStay=HotelStay.getInstance(context);
    }

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

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

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

    @Override
    public View getGroupView(final int groupPosition, boolean isExpanded, View convertView, ViewGroup parent)
    {
        ConciergeOptions options = (ConciergeOptions) getGroup(groupPosition);

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

        RelativeLayout container = (RelativeLayout) convertView.findViewById(R.id.container);
        TextView option_name = (TextView) convertView.findViewById(R.id.option_name);
        ImageView arrow = (ImageView) convertView.findViewById(R.id.arrow);

        option_name.setText(options.name);

        if(isExpanded){
            convertView.setBackgroundResource(R.color.bluebutton);
        }else{
            convertView.setBackgroundResource(R.color.transparent);
        }

        return convertView;
    }

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


    @Override
    public Object getChild(int groupPosition, int childPosititon) {
        ArrayList<ConciergeOptionsPairs> children=this.data.get(groupPosition).childrens;
        if(children!=null){
            return children.get(childPosititon);
        }
        return null;
    }

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


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

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

        TextView option_type = (TextView) convertView.findViewById(R.id.option_type);
        TextView price = (TextView) convertView.findViewById(R.id.price);
        TextView decimal = (TextView) convertView.findViewById(R.id.decimal);
        TextView currency = (TextView) convertView.findViewById(R.id.currency);

        ConciergeOptionsPairs option_pair = (ConciergeOptionsPairs) getChild(groupPosition, childPosition);
        option_type.setText(option_pair.name);

        double t_price = Double.parseDouble(option_pair.value);
        double dec = t_price - (long) t_price;
        long decim = (long) dec;

        int decimal_int = (int) t_price;

        price.setText("+" + String.valueOf(decimal_int));
        decimal.setText("." + String.valueOf(decim));
        currency.setText("$");

        return convertView;
    }

    @Override
    public void notifyDataSetChanged() {
        super.notifyDataSetChanged();
    }

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

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

知道如何解决这个问题？

Answer 1

我将 ConciergeOptionsPairs 视为您的子数据，因此在 ConciergeOptionsPairs 类中添加一个布尔变量 isSelect ，然后在 onChildClick

@Override public boolean onChildClick(ExpandableListView parent, View v, int groupPosition, int childPosition, long id) { ArrayList<ConciergeOptionsPairs> children=data.Options.get(groupPosition).childrens; //i consider this is your child view array, need to be same dataset which used as child array int count=0; for(ConciergeOptionsPairs objChild:children) { if(count==childPosition) objChild.isSelect=true; else objChild.isSelect=false; count++; } yourexpandableadpater.notifyDataSetChanged(); return false; } });

现在位于 getChildView
中的适配器中
@Override public View getChildView(final int groupPosition, final int childPosition, boolean isLastChild, View convertView, ViewGroup parent) { if (convertView == null) { LayoutInflater infalInflater = (LayoutInflater) this.context .getSystemService(Context.LAYOUT_INFLATER_SERVICE); convertView = infalInflater.inflate(R.layout.concierge_options_inner_items, null); } TextView option_type = (TextView) convertView.findViewById(R.id.option_type); TextView price = (TextView) convertView.findViewById(R.id.price); TextView decimal = (TextView) convertView.findViewById(R.id.decimal); TextView currency = (TextView) convertView.findViewById(R.id.currency); ConciergeOptionsPairs option_pair = (ConciergeOptionsPairs) getChild(groupPosition, childPosition); option_type.setText(option_pair.name); double t_price = Double.parseDouble(option_pair.value); double dec = t_price - (long) t_price; long decim = (long) dec; int decimal_int = (int) t_price; price.setText("+" + String.valueOf(decimal_int)); decimal.setText("." + String.valueOf(decim)); currency.setText("$"); if(option_pair.isSelect) convertView.setBackgroundColor(ContextCompat.getColor(context,R.color.orange)); else convertView.setBackgroundColor(ContextCompat.getColor(context,R.color.transparent)); return convertView; }

这就是我理解您可以使用此
检查的代码

ExpandableListView项目背景颜色奇怪的行为

1 个答案: