Android之发送与接收JSON数据
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出处: http://blog.csdn.net/weidi1989/article/details/8560197
客户端向服务器端发送数据,这里用到了两种,一种是在url中带参数,一种是json数据发送方式;
url带参数的写法:
url+/?r=m/calendar/contact_list&uid=3&&subscriptionslist[pageindex]=10&subscriptionslist[recordlimit]=10
从“&”符号之后一连串都是参数。
发送方式代码编写
- DefaultHttpClient httpClient = new DefaultHttpClient();
- HttpPost httpPost = new HttpPost(HttpUtil.BASIC_URL
- + HttpUtil.SUBSCRIPTION_URL);
- try{
- if (cookie != null) {
- // httpClient.setCookieStore(LoginJsonUtil.cookie);
- List<NameValuePair> nameValuePair = new ArrayList<NameValuePair>(2);
- nameValuePair.add(new BasicNameValuePair("uid",
- uid));
- nameValuePair.add(new BasicNameValuePair("subscriptionslist[pageindex]",
- subscriptionslist_pageindex));
- nameValuePair.add(new BasicNameValuePair("subscriptionslist[recordlimit]",
- subscriptionslist_recordlimit));
- httpPost.setEntity(new UrlEncodedFormEntity(nameValuePair));
传递参数使用nameValuePair。
如果使用cookie的话,使用上段代码中注释掉的部分
httpClient.setCookieStore(LoginJsonUtil.cookie);
使用json数据格式发送信息向服务器端:
- HttpClient httpClient = new DefaultHttpClient();
- try {
- HttpPost httpPost = new HttpPost(BASIC_URL + url);
- List<NameValuePair> nameValuePair = new ArrayList<NameValuePair>();
- JSONObject jsonObject = new JSONObject();
- JSONObject jsonObject2 = new JSONObject();
- jsonObject.put("uemail", userbean.getEmail());
- jsonObject.put("password", userbean.getPassword());
- jsonObject2.put("userbean", jsonObject);
- nameValuePair.add(new BasicNameValuePair("jsonString", jsonObject
- .toString()));
- Log.i("lifeweeker", jsonObject2.toString());
- httpPost.setEntity(new UrlEncodedFormEntity(nameValuePair));
这里每个put的顺序我不清楚有没有规定,我是严格按照提供的前后顺序来组合json数据格式的。
json数据格式解析我自己分为两种;
一种是普通的,一种是带有数组形式的;
普通形式的:
服务器端返回的json数据格式如下:
{"userbean":{"Uid":"100196","Showname":"\u75af\u72c2\u7684\u7334\u5b50","Avtar":null,"State":1}}
分析代码如下:
- // TODO 状态处理 500 200
- int res = 0;
- res = httpClient.execute(httpPost).getStatusLine().getStatusCode();
- if (res == 200) {
- HttpResponse httpResponse = httpClient.execute(httpPost);
- StringBuilder builder = new StringBuilder();
- BufferedReader bufferedReader2 = new BufferedReader(
- new InputStreamReader(httpResponse.getEntity().getContent()));
- String str2 = "";
- for (String s = bufferedReader2.readLine(); s != null; s = bufferedReader2
- .readLine()) {
- builder.append(s);
- }
- Log.i("cat", ">>>>>>" + builder.toString());
- JSONObject jsonObject = new JSONObject(builder.toString())
- .getJSONObject("userbean");
- String Uid;
- String Showname;
- String Avtar;
- String State;
- Uid = jsonObject.getString("Uid");
- Showname = jsonObject.getString("Showname");
- Avtar = jsonObject.getString("Avtar");
- State = jsonObject.getString("State");
带数组形式的:
服务器端返回的数据格式为:
- {"calendar":
- {"calendarlist":
- [
- {"calendar_id":"1705","title":"(\u4eb2\u5b50)ddssd","category_name":"\u9ed8\u8ba4\u5206\u7c7b","showtime":"1288927800","endshowtime":"1288931400","allDay":false},
- {"calendar_id":"1706","title":"(\u65c5\u884c)","category_name":"\u9ed8\u8ba4\u5206\u7c7b","showtime":"1288933200","endshowtime":"1288936800","allDay":false}
- ]
- }
- }
- 分析代码如下:
- // TODO 状态处理 500 200
- int res = 0;
- res = httpClient.execute(httpPost).getStatusLine().getStatusCode();
- if (res == 200) {
- HttpResponse httpResponse = httpClient.execute(httpPost);
- StringBuilder builder = new StringBuilder();
- BufferedReader bufferedReader2 = new BufferedReader(
- new InputStreamReader(httpResponse.getEntity().getContent()));
- String str2 = "";
- for (String s = bufferedReader2.readLine(); s != null; s = bufferedReader2
- .readLine()) {
- builder.append(s);
- }
- Log.i("cat", ">>>>>>" + builder.toString());
- JSONObject jsonObject = new JSONObject(builder.toString())
- .getJSONObject("calendar");
- JSONArray jsonArray = jsonObject.getJSONArray("calendarlist");
- for(int i=0;i<jsonArray.length();i++){
- JSONObject jsonObject2 = (JSONObject)jsonArray.opt(i);
- CalendarInfo calendarInfo = new CalendarInfo();
- calendarInfo.setCalendar_id(jsonObject2.getString("calendar_id"));
- calendarInfo.setTitle(jsonObject2.getString("title"));
- calendarInfo.setCategory_name(jsonObject2.getString("category_name"));
- calendarInfo.setShowtime(jsonObject2.getString("showtime"));
- calendarInfo.setEndtime(jsonObject2.getString("endshowtime"));
- calendarInfo.setAllDay(jsonObject2.getBoolean("allDay"));
- calendarInfos.add(calendarInfo);
- }
总结,普通形式的只需用JSONObject ,带数组形式的需要使用JSONArray 将其变成一个list。
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