解决android expandablelistview 里面嵌入gridview行数据重复问题

最近做了一个“csdn专家博客App” 当然了是android版本，在专家浏览页面，我才用了expandablelistview 组件来显示专家分类，每个分类点击之后可以显示专家的头像和名字。

很简单一个功能，先看效果图：

结果发现一个问题，就是每个分类里的数据存在重复插入好几次的现象；

ExpertGridAdapter.java  gridview的adapter

public class ExpertGridAdapter extends BaseAdapter {
        private LayoutInflater inflater;
        private CsBlogger[] datals;

        private Context mContext;
        private String TAG="ExpertGridAdapter";

        public ExpertGridAdapter(Context context,List<CsBlogger> childs) {
            this.inflater = LayoutInflater.from(context);

            datals=new CsBlogger[childs.size()];
            childs.toArray(datals);

            CsLog.d("maomao", "childs.size:"+childs.size());
            mContext=context;
        }

        @Override
        public int getCount() {
            return datals.length;
        }

        @Override
        public Object getItem(int position) {
            return datals[position];
        }

        @Override
        public long getItemId(int position) {
            return position;
        }

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            ViewHolder holder;
            if (convertView==null) {
                holder=new ViewHolder();
                convertView=this.inflater.inflate(R.layout.csblog_expert_item_menu, null);
                holder.iv=(ImageView) convertView.findViewById(R.id.item_image);
                holder.tv=(TextView) convertView.findViewById(R.id.item_text);
                convertView.setTag(holder);
            }
            else {
               holder=(ViewHolder) convertView.getTag();
            }
            CsBlogger expert=datals[position];


            DisplayImageOptions options; // 显示图像设置
            ImageLoader imageLoader = ImageLoader.getInstance();// 得到图片加载器
            // 图片加载器初始化
            imageLoader.init(ImageLoaderConfiguration.createDefault(mContext));
            // 使用DisplayImageOptions.Builder()创建DisplayImageOptions
            options = new DisplayImageOptions.Builder()
                    .showStubImage(R.drawable.blogger) // 设置图片下载期间显示的图片
                    .showImageForEmptyUri(R.drawable.blogger) // 设置图片Uri为空或是错误的时候显示的图片
                    .showImageOnFail(R.drawable.blogger) // 设置图片加载或解码过程中发生错误显示的图片
                    .cacheInMemory() // 设置下载的图片是否缓存在内存中
                    .cacheOnDisc() // 设置下载的图片是否缓存在SD卡中
                    .displayer(new RoundedBitmapDisplayer(20)) // 设置成圆角图片
                    .build(); // 创建配置过得DisplayImageOption对象





         // 异步加载图片  专家头像
                    imageLoader
                            .displayImage(expert.getUserface(),  holder.iv, options);


            holder.tv.setText(expert.getNickname());
            return convertView;
        }
        private class ViewHolder{
            ImageView iv;
            TextView tv;
        }


}

ExpertsListViewAdapter.java  可扩展的listview

public class ExpertsListViewAdapter extends BaseExpandableListAdapter implements
        OnItemClickListener
{
    public static final int ItemHeight = 136;// 每项的高度
    public static final int PaddingLeft = 96;// 每项的高度
    private int myPaddingLeft = 0;

    private List<TreeNode> treeNodes = new ArrayList<TreeNode>();

    private Context parentContext;

    private LayoutInflater layoutInflater;


    public ExpertsListViewAdapter(Context view, int myPaddingLeft,List<TreeNode> treeNodes)
    {
        parentContext = view;
        this.myPaddingLeft = myPaddingLeft;
        this.treeNodes=treeNodes;
    }


    public void RemoveAll()
    {
        treeNodes.clear();
    }

    public CsBlogger getChild(int groupPosition, int childPosition)
    {
        return treeNodes.get(groupPosition).childs.get(childPosition);
    }
    @Override
    public int getChildrenCount(int groupPosition)
    {
        //return treeNodes.get(groupPosition).childs.size();
        //  返回值必须为1，否则会重复数据
        return 1;
    }

     public TextView getTextView(Context context)
    {
        AbsListView.LayoutParams lp = new AbsListView.LayoutParams(
                ViewGroup.LayoutParams.FILL_PARENT, ItemHeight);

        TextView textView = new TextView(context);
        textView.setLayoutParams(lp);
        textView.setGravity(Gravity.CENTER_VERTICAL | Gravity.LEFT);
        return textView;
    }



     class ExpandableListHolder {
         CsGridView grdiview;

        }

    private ExpertGridAdapter adatper;
    /**
     * 可自定义ExpandableListView
     */
    public View getChildView(int groupPosition, int childPosition,
            boolean isLastChild, View convertView, ViewGroup parent)
    {
        CsLog.d("maomao", "getChildView, groupPosition:"+groupPosition+",childs size:"+treeNodes.get(groupPosition).childs.size());
        //if (convertView == null)
        {
            CsLog.d("maomao", "converView is null");
            layoutInflater = (LayoutInflater) parentContext
                    .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            convertView = layoutInflater.inflate(R.layout.csblog_expert_view, null);



            CsGridView toolbarGrid = (CsGridView) convertView
                    .findViewById(R.id.GridView_toolbar);
            toolbarGrid.setNumColumns(4);// 设置每行列数
            toolbarGrid.setGravity(Gravity.CENTER);// 位置居中
            toolbarGrid.setHorizontalSpacing(10);// 水平间隔
            adatper=new ExpertGridAdapter(parentContext,treeNodes.get(groupPosition).childs);
            toolbarGrid.setAdapter(adatper);// 设置菜单Adapter
            toolbarGrid.setOnItemClickListener(this);
            adatper.notifyDataSetChanged();
        }
        //else{
        //  CsLog.d("maomao", "convertView!=null");
        //}

        return convertView;
    }

    /**
     * 可自定义list
     */
    public View getGroupView(int groupPosition, boolean isExpanded,
            View convertView, ViewGroup parent)
    {
        TextView textView = getTextView(this.parentContext);
        String gname=getGroup(groupPosition).toString()+"("+treeNodes.get(groupPosition).childs.size()+")";
        textView.setText(gname);
        textView.setPadding(myPaddingLeft + PaddingLeft, 0, 0, 0);
        return textView;
    }



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

    public Object getGroup(int groupPosition)
    {
        return treeNodes.get(groupPosition).parent;
    }

    public int getGroupCount()
    {
        return treeNodes.size();
    }

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

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

    public boolean hasStableIds() {
        return true;
    }


    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position,
            long id)
    {
        Toast.makeText(parentContext, "当前选中的是:" + position, Toast.LENGTH_SHORT)
                .show();

    }
}

大家注意这个方法，知道这两种写法的区别吗？ 当然 return1 ，就可以得到上面截图的效果。

@Override
public int getChildrenCount(int groupPosition)
{
    //return treeNodes.get(groupPosition).childs.size();
    //  返回值必须为1，否则会重复数据
    return 1;
}

• 加入CSDN技术群：221057495 与我交流