在按鈕上單擊展開android中的可擴展Listview

Question

我正在使用其自定義適配器實現可擴展列表視圖。 group元素需要有2個按鈕，首先是父組元素，其下是一個按鈕。

我的問題是，我想單擊下面的按鈕而不是group元素來展開列表視圖。 同樣，組元素onClick需要調用另一個活動。

我可以通過以下方式禁用expandablelistview的expandablelistview

mainExpListView.setOnGroupClickListener(new OnGroupClickListener() {

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

        return false;
    }

所以我的問題是：

1. 有什么方法可以禁用group元素並使其執行其他功能（例如導航到另一個活動嗎？）

2. 如何在其底部圖像上設置onclick方法以展開？

Answer 1

 this is the groupview of my adapter and expand is the button on which i am performing  expand and collapse of my expanded list.



    public View getGroupView(final int groupPosition, final boolean isExpanded,
                             View convertView, final 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.childlist_group, null);
        }

        TextView lblListHeader = (TextView) convertView.findViewById(R.id.lblListHeader);
        ImageView expand = (ImageView) convertView.findViewById(R.id.expand);
        if (isExpanded) {
            expand.setImageResource(R.mipmap.ic_star_selected);
        } else {
            expand.setImageResource(R.mipmap.ic_keyboard_arrow_right_black_24dp);
        }
        expand.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                // frag.expandandcollapse(isExpanded,groupPosition);
                if (isExpanded) ((ExpandableListView) parent).collapseGroup(groupPosition);
                else ((ExpandableListView) parent).expandGroup(groupPosition, true);
            }
        });
        lblListHeader.setText(headerTitle);


        return convertView;
    }


therefore one more thing to keep in mind u have to override the default expand and collapse of your expandedlistview.........just change the return type of on groupclick listner from false to true


example
ExpandableListView.OnGroupClickListener()
 {
            @Override

            public boolean onGroupClick(ExpandableListView parent, View v, int groupPosition, long id) 
{


                String groupNvalue = MyApp.getInstance().categoryNvalues.get(groupPosition);
                Showtoast(groupNvalue);

                return true;///this has to be changed to true in your activity or fragment
            }
        });

Answer 2

我不確定，但是在適配器中，您可以在視圖上設置點擊監聽器

@Override
public View getGroupView(int pos, boolean arg1, View convertView, ViewGroup arg3) {

if (convertView == null) {
        LayoutInflater infalInflater = (LayoutInflater) act
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        convertView = infalInflater.inflate(R.layout.drawerlayout, null);
    }
      convertView.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View arg0) {
            // TODO Auto-generated method stub

        }
    })
   }