在点击更改Android图片，自定义扩展列表适配器自定义、适配器、列表、图片

2023-09-07 09:55:26 作者：男人不狠江山不稳

我要去实施消耗的ListView自定义扩展列表适配器..而且还对组图像变化扩大和崩溃组...我可扩展列表视图工作做好，但是当我设置的图像变化对这些事件有，当我展开一个autometically另外一个人的形象也改变一些problem..ie ...我想我不能举行组项目的正确地址。 PLZ帮我...这里是我的code ..

 公共类HomeFrame扩展片段{    ExpandableListAdapter listAdapter;    ExpandableListView expListView;    清单＆LT;串GT; listDataHeader;    ImageView的img_selection;    HashMap的＆LT;字符串列表＆LT;串GT;＆GT; listDataChild =新的HashMap＆LT;字符串列表＆LT;串GT;＆GT;（）;     公共静态INT [] = GalImages新INT [] {                R.drawable.banner_one，                R.drawable.banner，                R.drawable.banner_three，                R.drawable.banner_two，};    公共HomeFrame（）{    }    @覆盖    公共查看onCreateView（LayoutInflater充气器，容器的ViewGroup，            捆绑savedInstanceState）{        查看rootView = inflater.inflate（R.layout.home_frame，集装箱，FALSE）;        ViewPager viewPager =（ViewPager）rootView.findViewById（R.id.banner）;        ImageAdapter适配器=新ImageAdapter（getActivity（））;        viewPager.setAdapter（适配器）;        //img_selection=(ImageView)rootView.findViewById(R.id.img_selection）;        expListView =（ExpandableListView）rootView.findViewById（R.id.lvExp）;        // preparing列表数据        prepareListData（）;        listAdapter =新ExpListAdapter（getActivity（），listDataHeader，                listDataChild）;        //设置列表适配器        expListView.setAdapter（listAdapter）;        //列表视图组单击监听器        expListView.setOnGroupClickListener（新OnGroupClickListener（）{            @覆盖            公共布尔onGroupClick（ExpandableListView父视图V，                    INT groupPosition，长ID）{                Toast.makeText（getActivity（），                 集团已点击+ listDataHeader.get（groupPosition）                 Toast.LENGTH_SHORT）.show（）;                返回false;            }        }）;        //列表视图集团扩大监听器        expListView.setOnGroupExpandListener（新OnGroupExpandListener（）{            @覆盖            公共无效onGroupExpand（INT groupPosition）{                  Toast.makeText（getActivity（），                  groupPosition +展开，                  Toast.LENGTH_SHORT）.show（）;             img_selection =（ImageView的）expListView.getChildAt（groupPosition）.findViewById（R.id.img_selection）;                img_selection.setImageResource（R.drawable.arrow_se）;            }        }）;        //列表视图组collasped监听器        expListView.setOnGroupCollapseListener（新OnGroupCollapseListener（）{            @覆盖            公共无效onGroupCollapse（INT groupPosition）{                 Toast.makeText（getActivity（），                 groupPosition +坍塌，                 Toast.LENGTH_SHORT）.show（）;                 img_selection =（ImageView的）expListView.getChildAt（groupPosition）.findViewById（R.id.img_selection）;                // ImageView的img_selection =（ImageView的）get.findViewById（R.id.img_selection）;                img_selection.setImageResource（R.drawable.arrow）;            }        }）;        //列表视图儿童点击监听器        expListView.setOnChildClickListener（新OnChildClickListener（）{            @覆盖            公共布尔onChildClick（ExpandableListView父视图V，                    INT groupPosition，诠释childPosition，长ID）{                // TODO自动生成方法存根                / *                 * Toast.makeText（getActivity（），                 * listDataHeader.get（groupPosition）+：+                 * listDataChild.get（listDataHeader.get（groupPosition））。得到（                 * childPosition），Toast.LENGTH_SHORT）.show（）;                 * /                返回false;            }        }）;        返回rootView;    }

和适配器类。

 公共类ExpListAdapter扩展BaseExpandableListAdapter {    私人语境_context;    私人列表＆LT;串GT; _listDataHeader; //头标题    //子数据头标题格式，标题子    私人的HashMap＆LT;字符串列表＆LT;串GT;＆GT; _listDataChild;    公共ExpListAdapter（上下文的背景下，列表与LT;弦乐＆GT; listDataHeader，            HashMap的＆LT;字符串列表＆LT;串GT;＆GT; listChildData）{        this._context =背景;        this._listDataHeader = listDataHeader;        this._listDataChild = listChildData;    }    @覆盖    公共对象getChild（INT groupPosition，诠释childPosititon）{        返回this._listDataChild.get（this._listDataHeader.get（groupPosition））                获得（childPosititon）;    }    @覆盖    众长getChildId（INT groupPosition，诠释childPosition）{        返回childPosition;    }    @覆盖    公共查看getChildView（INT groupPosition，最终诠释childPosition，            布尔isLastChild，查看convertView，父母的ViewGroup）{        最后弦乐childText =（字符串）getChild（groupPosition，childPosition）;        如果（convertView == NULL）{            LayoutInflater infalInflater =（LayoutInflater）this._context                    .getSystemService（Context.LAYOUT_INFLATER_SERVICE）;            convertView = infalInflater.inflate（R.layout.list_item，NULL）;        }        TextView的txtListChild =（TextView中）convertView                .findViewById（R.id.lblListItem）;        txtListChild.setText（childText）;        返回convertView;    }    @覆盖    公众诠释getChildrenCount（INT groupPosition）{        返回this._listDataChild.get（this._listDataHeader.get（groupPosition））                。尺寸（）;    }    @覆盖    公共对象getGroup（INT groupPosition）{        返回this._listDataHeader.get（groupPosition）;    }    @覆盖    公众诠释getGroupCount（）{        返回this._listDataHeader.size（）;    }    @覆盖    众长getGroupId（INT groupPosition）{        返回groupPosition;    }    @覆盖    公共查看getGroupView（INT groupPosition，布尔isExpanded，            查看convertView，父母的ViewGroup）{        字符串headerTitle =（字符串）getGroup（groupPosition）;        如果（convertView == NULL）{            LayoutInflater infalInflater =（LayoutInflater）this._context                    .getSystemService（Context.LAYOUT_INFLATER_SERVICE）;            convertView = infalInflater.inflate（R.layout.item_home，NULL）;        }        TextView的lblListHeader =（TextView中）convertView                .findViewById（R.id.heading）;        // ImageView的img_selection =（ImageView的）convertView.findViewById（R.id.img_selection）;        lblListHeader.setTypeface（NULL，Typeface.BOLD）;        lblListHeader.setText（headerTitle）;        //img_selection.setImageResource(R.drawable.arrow）;        返回convertView;    }    @覆盖    公共布尔hasStableIds（）{        返回false;    }    @覆盖    公共布尔isChildSelectable（INT groupPosition，诠释childPosition）{        返回true;    }}

解决方案商品列表名称支持自定义设置啦

在自定义适配器在 getGroupView（）做到这一点：

  @覆盖 公共查看getGroupView（INT groupPosition，布尔isExpanded，观景，                父母的ViewGroup）{    ImageView的img_selection =（ImageView的）view.findViewById（R.id.img_selection）;    INT imageResourceId = isExpanded？ R.drawable.group_closed                        ：R.drawable.group_open;     img_selection.setImageResource（imageResourceId）;}

i am going to implementing expendable listview with custom expandable list adapter.. And also image change on group expand and group collapse...My Expandable list view work well but when i set image change on those event there are some problem..i.e when i expand one the autometically another one's image also change...i think i can not hold the proper address of the group item. Plz help me ... here is my code..

public class HomeFrame extends Fragment {

    ExpandableListAdapter listAdapter;
    ExpandableListView expListView;
    List<String> listDataHeader;
    ImageView img_selection;
    HashMap<String, List<String>> listDataChild = new HashMap<String, List<String>>();
     public static int[] GalImages = new int[] {
                R.drawable.banner_one,
                R.drawable.banner,
                R.drawable.banner_three,
                R.drawable.banner_two,};
    public HomeFrame() {

    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {

        View rootView = inflater.inflate(R.layout.home_frame, container, false);

        ViewPager viewPager = (ViewPager) rootView.findViewById(R.id.banner);
        ImageAdapter adapter = new ImageAdapter(getActivity());
        viewPager.setAdapter(adapter);

        //img_selection=(ImageView)rootView.findViewById(R.id.img_selection);

        expListView = (ExpandableListView) rootView.findViewById(R.id.lvExp);

        // preparing list data
        prepareListData();

        listAdapter = new ExpListAdapter(getActivity(), listDataHeader,
                listDataChild);

        // setting list adapter
        expListView.setAdapter(listAdapter);

        // Listview Group click listener
        expListView.setOnGroupClickListener(new OnGroupClickListener() {

            @Override
            public boolean onGroupClick(ExpandableListView parent, View v,
                    int groupPosition, long id) {
                Toast.makeText(getActivity(),
                 "Group Clicked " + listDataHeader.get(groupPosition),
                 Toast.LENGTH_SHORT).show();
                return false;

            }
        });

        // Listview Group expanded listener
        expListView.setOnGroupExpandListener(new OnGroupExpandListener() {

            @Override
            public void onGroupExpand(int groupPosition) {

                  Toast.makeText(getActivity(),
                  groupPosition + " Expanded",
                  Toast.LENGTH_SHORT).show();

             img_selection=(ImageView)expListView.getChildAt(groupPosition).findViewById(R.id.img_selection);
                img_selection.setImageResource(R.drawable.arrow_se);
            }
        });

        // Listview Group collasped listener
        expListView.setOnGroupCollapseListener(new OnGroupCollapseListener() {

            @Override
            public void onGroupCollapse(int groupPosition) {

                 Toast.makeText(getActivity(),
                 groupPosition + " Collapsed",
                 Toast.LENGTH_SHORT).show();

                 img_selection=(ImageView) expListView.getChildAt(groupPosition).findViewById(R.id.img_selection);
                //ImageView img_selection=(ImageView) get.findViewById(R.id.img_selection);

                img_selection.setImageResource(R.drawable.arrow);
            }
        });

        // Listview on child click listener
        expListView.setOnChildClickListener(new OnChildClickListener() {

            @Override
            public boolean onChildClick(ExpandableListView parent, View v,
                    int groupPosition, int childPosition, long id) {
                // TODO Auto-generated method stub
                /*
                 * Toast.makeText( getActivity(),
                 * listDataHeader.get(groupPosition) + " : " +
                 * listDataChild.get( listDataHeader.get(groupPosition)).get(
                 * childPosition), Toast.LENGTH_SHORT) .show();
                 */
                return false;
            }
        });

        return rootView;
    }

And Adapter class is..

public class ExpListAdapter extends BaseExpandableListAdapter {

    private Context _context;
    private List<String> _listDataHeader; // header titles
    // child data in format of header title, child title
    private HashMap<String, List<String>> _listDataChild;

    public ExpListAdapter(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.item_home, null);
        }

        TextView lblListHeader = (TextView) convertView
                .findViewById(R.id.heading);
        //ImageView img_selection=(ImageView)convertView.findViewById(R.id.img_selection);
        lblListHeader.setTypeface(null, Typeface.BOLD);
        lblListHeader.setText(headerTitle);
        //img_selection.setImageResource(R.drawable.arrow);

        return convertView;
    }

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

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

}

解决方案

In your custom adapter in the getGroupView() do this:

@Override
 public View getGroupView(int groupPosition, boolean isExpanded, View view,
                ViewGroup parent) {

    ImageView img_selection=(ImageView) view.findViewById(R.id.img_selection);
    int imageResourceId = isExpanded ? R.drawable.group_closed
                        : R.drawable.group_open;
     img_selection.setImageResource(imageResourceId);
}

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