Android开发日记（五）

从服务器端传递多个数据

先在服务器端设置cs文件

using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;

namespace WebJSON.Controllers
{
    public class adShowTitleController : Controller
    {
        DataInfo storedb = new DataInfo();
        //
        // GET: /JobDetails/

        public JArray Index(int adid = int.MaxValue)
        {

            IEnumerable<ad> ads;
            ads = storedb.ad.Where(u => u.adid < adid).OrderByDescending(u => u.adid).Take(15);
            string json = JsonConvert.SerializeObject(ads);
            return JArray.Parse(json);
        }

    }
}

传递所有id小于所设置的最大值的json数组对象

然后在java客户端调用service方法取回这些json对象

在调用listItem方法用一个for循环设置所有listItem每层循环后加listItem.add(map);再生成一个新的listItem

listItem定义：ArrayList<HashMap<String, Object>> listItem;
                   SimpleAdapter listItemAdapter;

listItem = new ArrayList<HashMap<String, Object>>();
    for (int i = 0; i < addetailsJsonArray.length(); i++) {
        JSONObject lectureJsonObject = addetailsJsonArray.optJSONObject(i);
        HashMap<String, Object> map = new HashMap<String, Object>();
        map.put("lectureid", lectureJsonObject.optInt("adid"));
        map.put("lecturetitle",lectureJsonObject.optString("adtitle").trim());
        map.put("reporter", lectureJsonObject.optString("adman").trim());
        map.put("lecturetime",lectureJsonObject.optString("addate").replace("T"," ").trim());
                        //.replace("T", " ").substring(0, 19));
        //map.put("lecturesite", lectureJsonObject.optString("lecturesite").trim());
        //map.put("campus",lectureJsonObject.optString("campus").trim());
        //map.put("remark",lectureJsonObject.optString("remark").trim());
        //map.put("depart", lectureJsonObject.optString("depart").trim());
        //map.put("starttime", lectureJsonObject.optString("starttime").trim());
        //lastLectureid=lectureJsonObject.optInt("id");
        listItem.add(map);
        // TODO Auto-generated method stub
        listItemAdapter = new SimpleAdapter(this, listItem,// 数据源
                R.layout.leturetitle_listview,// ListItem的XML实现
                        // 动态数组与ImageItem对应的子项
                new String[] { "lectureid", "lecturetitle",
                        "reporter", "lecturetime"},
                // ImageItem的XML文件里面的一个ImageView,两个TextView ID
                new int[] { R.id.textView_lectureid,
                        R.id.textView_lecturetitle, R.id.textView_report,
                        R.id.textView_lecturetime });
        listViewNewsMoreTitles.setAdapter(listItemAdapter);