Android之发送与接收JSON数据

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。