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
1 using Newtonsoft.Json; 2 using Newtonsoft.Json.Linq; 3 using System; 4 using System.Collections.Generic; 5 using System.Linq; 6 using System.Web; 7 using System.Web.Mvc; 8 9 namespace WebJSON.Controllers 10 { 11 public class adShowTitleController : Controller 12 { 13 DataInfo storedb = new DataInfo(); 14 // 15 // GET: /JobDetails/ 16 17 public JArray Index(int adid = int.MaxValue) 18 { 19 20 IEnumerable<ad> ads; 21 ads = storedb.ad.Where(u => u.adid < adid).OrderByDescending(u => u.adid).Take(15); 22 string json = JsonConvert.SerializeObject(ads); 23 return JArray.Parse(json); 24 } 25 26 } 27 }
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;
1 listItem = new ArrayList<HashMap<String, Object>>(); 2 for (int i = 0; i < addetailsJsonArray.length(); i++) { 3 JSONObject lectureJsonObject = addetailsJsonArray.optJSONObject(i); 4 HashMap<String, Object> map = new HashMap<String, Object>(); 5 map.put("lectureid", lectureJsonObject.optInt("adid")); 6 map.put("lecturetitle",lectureJsonObject.optString("adtitle").trim()); 7 map.put("reporter", lectureJsonObject.optString("adman").trim()); 8 map.put("lecturetime",lectureJsonObject.optString("addate").replace("T"," ").trim()); 9 //.replace("T", " ").substring(0, 19)); 10 //map.put("lecturesite", lectureJsonObject.optString("lecturesite").trim()); 11 //map.put("campus",lectureJsonObject.optString("campus").trim()); 12 //map.put("remark",lectureJsonObject.optString("remark").trim()); 13 //map.put("depart", lectureJsonObject.optString("depart").trim()); 14 //map.put("starttime", lectureJsonObject.optString("starttime").trim()); 15 //lastLectureid=lectureJsonObject.optInt("id"); 16 listItem.add(map); 17 // TODO Auto-generated method stub 18 listItemAdapter = new SimpleAdapter(this, listItem,// 数据源 19 R.layout.leturetitle_listview,// ListItem的XML实现 20 // 动态数组与ImageItem对应的子项 21 new String[] { "lectureid", "lecturetitle", 22 "reporter", "lecturetime"}, 23 // ImageItem的XML文件里面的一个ImageView,两个TextView ID 24 new int[] { R.id.textView_lectureid, 25 R.id.textView_lecturetitle, R.id.textView_report, 26 R.id.textView_lecturetime }); 27 listViewNewsMoreTitles.setAdapter(listItemAdapter);
