在Android HttpURLConnection类和消费GSON ASP.NET网页API [英] Consuming ASP.NET Web Api from Android HttpUrlConnection and Gson
本文介绍了在Android HttpURLConnection类和消费GSON ASP.NET网页API的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
Heyy大家，
我想从Android使用Web服务，我这样做，从我的Java桌面应用程序，它工作得很好，但是当我试图在Android我有很多的错误。
我已经固定IIS前preSS的localhost的问题。
请，帮助我。
公共无效SetCloud（视图v）{ ConnectionTask任务=新ConnectionTask（）; 尝试{
task.execute（）获得（）。
}赶上（InterruptedException的E）{
// TODO自动生成catch块
e.printStackTrace（）;
}赶上（为ExecutionException E）{
// TODO自动生成catch块
e.printStackTrace（）;
}
/ *
HTTP的http = HttpFactory.create（上下文）;
http.post（http://192.168.8.2:57888/api/Employees/AddAccount）
。数据（新AccountBag（Test123，TestServer12，D19916F-7C51-4AD6-AC24））
。发送（）;*/
}
私有类ConnectionTask扩展的AsyncTask＆LT;太虚，太虚，字符串＆GT; {
字符串响应code = NULL;
@覆盖
保护字符串doInBackground（虚空......为arg0）{
尝试{ 网址URL =新的URL（http://192.168.8.2:57888/api/Employees/AddAccount）;
// URL URL =新的URL（http://esprit.azurewebsites.net/api/comments）;
HttpURLConnection的康恩=（HttpURLConnection类）url.openConnection（）;
conn.setDoOutput（真）;
conn.setRequestMethod（POST）;
conn.setRequestProperty（内容类型，应用/ JSON）;
AccountBag物镜=新AccountBag（Test123，TestServer12，D19916F-7C51-4AD6-AC24/ *日期时间，AAA，BBBB，CCCC，DDDD，FFFF* /）;
GSON GSON =新GSON（）; // java对象转换成JSON格式，
//并返回JSON格式的字符串
JSON字符串= gson.toJson（OBJ）; OutputStream的OS = conn.getOutputStream（）;
//os.write（input.getBytes（））;
os.write（json.getBytes（））;
os.flush（）; / *如果（conn.getResponse code（）！= HttpURLConnection.HTTP_CREATED）{
抛出新的RuntimeException（失败：HTTP错误code：
+ conn.getResponse code（））;
} * /
响应code =+ conn.getResponse code（）; BR的BufferedReader =新的BufferedReader（新的InputStreamReader（
（conn.getInputStream（））））; 字符串输出;
的System.out.println（从服务器输出.... \\ n）;
而（（输出= br.readLine（））！= NULL）{
的System.out.println（输出）;
} conn.disconnect（）; }赶上（MalformedURLException的E）{ e.printStackTrace（）; }赶上（IOException异常五）{ e.printStackTrace（）; }
返回响应code; }
} 保护无效onPostExecute（字符串结果）{
//结果是你从你的连接得到了什么
//ConnectionTask.response$c$c.setText(result）; }}
解决方案
公共类RestAddGroupUser扩展的AsyncTask＆LT;名单，LT;用户组＆GT;，太虚，字符串＆GT; {
私人RestService lRestService;
私人字符串URL;
group_action活动;
ArrayList的＆LT;＆的LatLong GT; mParam;公共RestAddGroupUser（活动活动）{
URL = GlobalData.baseURL +AddGroupuser
this.activity =（group_action）活性;
}在preExecute保护无效（）{
}
字符串结果=;保护字符串doInBackground（列表＆LT;＆用户组GT; ... PARAMS）{ 尝试{ StringEntity连接;
//创建一个新的HttpClient和邮政头
HttpClient的HttpClient的=新DefaultHttpClient（）;
HttpPost httppost =新HttpPost（URL）; GSON GSON =新GSON（）;
串jsonobj = gson.toJson（PARAMS [0]）;
jsonobj = jsonobj.substring（1，jsonobj.length（） - 1）;
EN =新StringEntity（jsonobj，UTF-8）;
en.setContentType（应用/ JSON）; //添加参数
httppost.setEntity（EN）;
串的JSONObject = gson.toJson（PARAMS [1]）;
的JSONObject = jsonobject.substring（1，jsonobj.length（） - 1）;
EN =新StringEntity（的JSONObject，UTF-8）;
en.setContentType（应用/ JSON）; //添加参数
httppost.setEntity（EN）;
httppost = ServiceUtils.SetPostRequestHeader（httppost，活动）; //执行HTTP POST请求
HTT presponse响应= httpclient.execute（httppost）;
HttpEntity实体= response.getEntity（）;
如果（实体！= NULL）{
的InputStream inStream中= entity.getContent（）;
结果= convertStreamToString（插播广告）;
}
}赶上（ClientProtocolException E）{
e.printStackTrace（）;
}赶上（IOException异常五）{
e.printStackTrace（）;
}赶上（例外五）{
e.printStackTrace（）;
}
返回结果;
}
公共无效onPostExecute（字符串结果）{ GSON GSON =新GSON（）;
布尔状态= FALSE;
}
公共静态字符串convertStreamToString（InputStream为）{
读者的BufferedReader =新的BufferedReader（
新的InputStreamReader（是））;
StringBuilder的SB =新的StringBuilder（）; 串线= NULL; 尝试{
而（（行= reader.readLine（））！= NULL）{
sb.append（行+\\ n）;
}
}赶上（IOException异常五）{
e.printStackTrace（）;
} {最后
尝试{
is.close（）;
}赶上（IOException异常五）{
e.printStackTrace（）;
}
}
返回sb.toString（）;
}
}
Heyy everyone, I'm trying to consume a web service from Android, I did that from my Java Desktop App and it worked fine but when I tried it on Android I had a lot of errors. I already fixed the "localhost" problem with IIS express . Please Help me with that.
public void SetCloud(View v) {
ConnectionTask task = new ConnectionTask();
try {
task.execute().get();
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (ExecutionException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
/*
Http http = HttpFactory.create(context);
http.post("http://192.168.8.2:57888/api/Employees/AddAccount")
.data(new AccountBag("Test123", "TestServer12","D19916F-7C51-4AD6-AC24"))
.send();*/
}
private class ConnectionTask extends AsyncTask<Void, Void, String>{
String responseCode = null;
@Override
protected String doInBackground(Void... arg0) {
try {
URL url = new URL("http://192.168.8.2:57888/api/Employees/AddAccount");
//URL url = new URL("http://esprit.azurewebsites.net/api/comments");
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setDoOutput(true);
conn.setRequestMethod("POST");
conn.setRequestProperty("Content-Type", "application/json");
AccountBag obj = new AccountBag("Test123", "TestServer12","D19916F-7C51-4AD6-AC24"/*,"DateTime","aaa","bbbb","cccc","dddd","ffff"*/);
Gson gson = new Gson();
// convert java object to JSON format,
// and returned as JSON formatted string
String json = gson.toJson(obj);
OutputStream os = conn.getOutputStream();
//os.write(input.getBytes());
os.write(json.getBytes());
os.flush();
/*if (conn.getResponseCode() != HttpURLConnection.HTTP_CREATED) {
throw new RuntimeException("Failed : HTTP error code : "
+ conn.getResponseCode());
}*/
responseCode = ""+conn.getResponseCode();
BufferedReader br = new BufferedReader(new InputStreamReader(
(conn.getInputStream())));
String output;
System.out.println("Output from Server .... \n");
while ((output = br.readLine()) != null) {
System.out.println(output);
}
conn.disconnect();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return responseCode;
}
}
protected void onPostExecute(String result) {
// result is what you got from your connection
//ConnectionTask.responseCode.setText(result);
}
}
解决方案
public class RestAddGroupUser extends AsyncTask<List<UserGroup>,Void,String> {
private RestService lRestService;
private String url;
group_action activity;
ArrayList<LatLong> mParam;
public RestAddGroupUser(Activity activity) {
url= GlobalData.baseURL + "AddGroupuser";
this.activity = (group_action)activity;
}
protected void onPreExecute(){
}
String result = "";
protected String doInBackground(List<UserGroup>... params) {
try {
StringEntity en;
// Create a new HttpClient and Post Header
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost(url);
Gson gson = new Gson();
String jsonobj=gson.toJson(params[0]);
jsonobj=jsonobj.substring(1, jsonobj.length()-1);
en= new StringEntity(jsonobj,"UTF-8");
en.setContentType("application/json");
// Add parameters
httppost.setEntity(en);
String jsonobject=gson.toJson(params[1]);
jsonobject=jsonobject.substring(1, jsonobj.length()-1);
en= new StringEntity(jsonobject,"UTF-8");
en.setContentType("application/json");
// Add parameters
httppost.setEntity(en);
httppost = ServiceUtils.SetPostRequestHeader(httppost,activity);
// Execute HTTP Post Request
HttpResponse response = httpclient.execute(httppost);
HttpEntity entity = response.getEntity();
if (entity != null) {
InputStream inStream = entity.getContent();
result = convertStreamToString(inStream);
}
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
return result;
}
public void onPostExecute(String result){
Gson gson =new Gson();
boolean status = false;
}
public static String convertStreamToString(InputStream is){
BufferedReader reader = new BufferedReader(
new InputStreamReader(is));
StringBuilder sb = new StringBuilder();
String line = null;
try {
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
is.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return sb.toString();
}
}
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