可扩展的ListView使用Parse.com

Question

我正在尝试在我的应用程序中实现可扩展的listView，而不是常规的listView ..所有人都可以使用常规listView，但是我不知道如何使用Parse使用可扩展的ListView。com和我找不到任何例子可以帮助我。有人有任何想法吗？

以下是我的常规ListView的代码

public class ListViewPost extends BaseAdapter {
// Declare Variables
Context mContext;
LayoutInflater inflater;
private List<UsersPostsGet> UsersPostsGet = null;
List<ParseObject> ob;
private ArrayList<UsersPostsGet> arraylist;
String reportV;
String XXX;
public int postion;
public ImageLoader imageLoader;

public ListViewPost(Context context, List<UsersPostsGet> UsersPostsGet) {
    mContext = context;
    this.UsersPostsGet = UsersPostsGet;
    inflater = LayoutInflater.from(mContext);
    this.arraylist = new ArrayList<UsersPostsGet>();
    this.arraylist.addAll(UsersPostsGet);
}
public class ViewHolder {
    TextView username;
    TextView userpost;
    TextView posttime;
    ImageView thumbs;
    ImageView port;
    ImageView stuatsicon;
    ImageView attachpic;

}
public int getCount() {
    return UsersPostsGet.size();
}
public UsersPostsGet getItem(int position) {
    return UsersPostsGet.get(position);
}
public long getItemId(int position) {
    return position;
}
public View getView(final int position, View view, ViewGroup parent) {
    final ViewHolder holder;
    if (view == null) {
        holder = new ViewHolder();
        view = inflater.inflate(R.layout.postlayout, null);
        // Locate the TextViews in listview_item.xml
        holder.username = (TextView) view.findViewById(R.id.nickname);
        holder.userpost = (TextView) view.findViewById(R.id.userpost);
        holder.posttime = (TextView) view.findViewById(R.id.posttime);
        holder.thumbs = (ImageView) view.findViewById(R.id.thumbdown);
        holder.stuatsicon = (ImageView) view.findViewById(R.id.statusicon);
        holder.port = (ImageView) view.findViewById(R.id.imageView1);
        holder.attachpic = (ImageView) view.findViewById(R.id.attachpic);

        view.setTag(holder);
    } else {
        holder = (ViewHolder) view.getTag();
    }
    // Set the results into TextViews
    holder.username.setText(UsersPostsGet.get(position).getUsername());
    holder.userpost.setText(UsersPostsGet.get(position).getUserpost());
    holder.posttime.setText(UsersPostsGet.get(position).getPosttime());

    ImageLoader imageLoader=new ImageLoader(mContext);
    imageLoader.DisplayImage("http://www.nogomistars.com/wallpaper/ahmed-mekki-1898-25363-3138242.jpg", holder.port);

    XXX = UsersPostsGet.get(position).getId();
    reportV = UsersPostsGet.get(position).getReport();

    if (UsersPostsGet.get(position).geturl().contentEquals("")) {
        holder.attachpic.setVisibility(View.GONE);
    }
    if (UsersPostsGet.get(position).getstatus().contentEquals("green")) {
        holder.stuatsicon.setImageResource(R.drawable.green2);
    }
    if (UsersPostsGet.get(position).getstatus().contentEquals("lightgreen")) {
        holder.stuatsicon.setImageResource(R.drawable.lightgreenstatus);
    }
    if (UsersPostsGet.get(position).getstatus().contentEquals("yellow")) {
        holder.stuatsicon.setImageResource(R.drawable.yallowstatus);
    }
    if (UsersPostsGet.get(position).getstatus().toString()
            .contentEquals("orange")) {
        holder.stuatsicon.setImageResource(R.drawable.orangestatus);
    }
    if (UsersPostsGet.get(position).getstatus().toString()
            .contentEquals("red")) {
        holder.stuatsicon.setImageResource(R.drawable.redstatus);
    }
    if (UsersPostsGet.get(position).getstatus().contentEquals("blue")) {
        holder.stuatsicon.setImageResource(R.drawable.bluestatus);
    } 

    // Listen for ListView Item Click
    view.setOnClickListener(new OnClickListener() {
        public void onClick(View arg0) {
            // Send single item click data to SingleItemView Class
            Intent intent = new Intent(mContext, SingleItemView.class);
            // Pass all data rank

            intent.putExtra("username",
                    (UsersPostsGet.get(position).getUsername()));
            intent.putExtra("userpost",
                    (UsersPostsGet.get(position).getUserpost()));
            intent.putExtra("posttime",
                    (UsersPostsGet.get(position).getPosttime()));
            intent.putExtra("status",
                    (UsersPostsGet.get(position).getstatus()));
            intent.putExtra("url",
                    (UsersPostsGet.get(position).geturl()));

            mContext.startActivity(intent);

        }
    });
    return view;
}

}

Answer 1

您无法将Baseadapter用于可扩展的列表视图。创建一个从baseexpandablelistadapter扩展的适配器。GetView（）方法应分别替换为GetGroupView（）和GetChildView（），分别为组标头视图和子女视图。您可能还需要两个不同的布局来供小组和儿童视图。

这是最好的例子之一。您可以找到许多讨论ExplablElistView的教程。