android发送/接收json数据
16lz
2021-01-23
推荐安卓开发神器（里面有各种UI特效和android代码库实例）
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。
前面我有用到android发送json数据；这里我想总结一下我用到的解析json数据格式的方式
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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