高校手机签到系统——手机客户端

　　先前写了服务器端的权限系统：

　　高校手机签到系统——第一部分Authority权限系统（上）

　　高校手机签到系统——第一部分Authority权限系统（下）

一、服务器端说明

　　服务器端还有选课系统：

　　课程表：

在技术上，它们和权限系统相比没有更多的可以分享。接着来说说客户端。

二、客户端

　　客户端的难点就是和服务器端进行通信，很显然，服务器端是.net平台，客户端是android java平台，怎么使他们之间进行数据交换呢？这里有两种方法，当然是走协议，一种soap协议，一种httpclient模拟浏览器发出http请求。两张方法在我的客户端都有体现，先说说第一种，举个例子，这是一个客户端向服务器端发送一个string，这个string是从二维码图片上扫描到的某课程的唯一标识，发送到服务器端以完成签到。

  public class SignInThread implements Runnable
    {
        public SignInThread()
        {

        }

        @Override
        public void run()
        {
            String targetNameSpace="http://tempuri.org/";
            String WSDL=stringThings.getServerURL()+"/Models/SignInService.svc";
            //String WSDL="http://10.0.2.2:1034/Models/SignInService.svc";
            String MessageName="SignInRequest";
            String SoapAction="http://tempuri.org/ISignInService/SignIn";

            SoapObject soapObject=new SoapObject(targetNameSpace,MessageName);
            PropertyInfo pi = new PropertyInfo();
            SignEntry signEntry=new SignEntry();
            signEntry.setSignId(signId);
            pi.setName("SignEntry");
            pi.setValue(signEntry);
            pi.setType(SignEntry.class);
            soapObject.addProperty(pi);

            Element[] header = new Element[3];
            header[0] = new Element().createElement(targetNameSpace, "Username");
            header[0].addChild(Node.TEXT, stringThings.getUsername());

            header[1] = new Element().createElement(targetNameSpace, "IMSI");
            header[1].addChild(Node.TEXT, stringThings.getIMSI());

            header[2] = new Element().createElement(targetNameSpace, "IMEI");
            header[2].addChild(Node.TEXT, stringThings.getIMEI());

            SoapSerializationEnvelope envelope=new SoapSerializationEnvelope(SoapEnvelope.VER11);
            envelope.addMapping(SignEntry.NAMESPACE,"SignEntry",SignEntry.class);//register 这个很重要
            envelope.dotNet=true;
            envelope.headerOut = header;
            envelope.setOutputSoapObject(soapObject);

            HttpTransportSE httpTranstation=new HttpTransportSE(WSDL);

            try {
                httpTranstation.call(SoapAction, envelope);
                SoapPrimitive response =(SoapPrimitive)envelope.getResponse();
                if(response.toString()=="true")
                    CaptureActivity.this.finish();
            } catch (SoapFault soapFault) {
                soapFault.printStackTrace();  //To change body of catch statement use File | Settings | File Templates.
                CaptureActivity.this.failToSign();
            } catch (HttpResponseException e) {
                e.printStackTrace();  //To change body of catch statement use File | 
Settings | File Templates.
                CaptureActivity.this.failToSign();
            } catch (IOException e) {
                e.printStackTrace();  //To change body of catch statement use File | Settings | File Templates.    
                CaptureActivity.this.failToSign();
            } catch (XmlPullParserException e) {
                e.printStackTrace();  //To change body of catch statement use File | Settings | File Templates.
                CaptureActivity.this.failToSign();
            }
        }
    }

上面的方法中，有三个soapheader和下面C#代码对应:

 [MessageContract]
    public class SignInRequest
    {
        [MessageHeader]
        public string Username { get; set; }

        [MessageHeader]
        public string IMSI { get; set; }

        [MessageHeader]
        public string IMEI { get; set; }

        [MessageBodyMember]
        public SignEntry SignEntry { get; set; }

        public int IsUsersMessage()
        {
            UserSvc userSvc = new UserSvcImpl();
            Profile user = userSvc.SelectByName(Username)[0];
            if (user.IMSI == "" | user.IMEI == "")
                return -1;
            else
            {
                if (user.IMSI == IMSI && user.IMEI == IMEI)
                    return 1;
                else
                    return 0;
            }
        }
    }

    [MessageContract]
    public class SignInResponse
    {
        [MessageBodyMember]
        public bool IsSignIn { get; set; }
    }

　　上面ksoap调用服务器端的时候出现了一个异常WebSessionStore: Could not obtain reference to HttpContext，解决方法是

加上这句代码sqlMapper.SessionStore = new HybridWebThreadSessionStore(sqlMapper.Id); 　　　　第二种httpclient,在post和get上略有不同：

public class LoadScheduleThread implements Runnable　　//获取课程表，采用post方法
    {
        public LoadScheduleThread()
        {

        }

        @Override
        public void run()
        {
            HttpClient httpClient=new DefaultHttpClient();
            String targetUrl =stringThings.getServerURL()+"/Schedule/QuerySchedule";
            //String targetUrl ="http://10.0.2.2:1034/Schedule/QuerySchedule";
            HttpPost httpPost = new HttpPost(targetUrl);

            SimpleDateFormat simpleDateFormat = new SimpleDateFormat("MM/dd/yyyy");
            String date = simpleDateFormat.format(new java.util.Date());
            List params = new ArrayList();
            params.add(new BasicNameValuePair("username",stringThings.getUsername()));
            params.add(new BasicNameValuePair("date",date));
            //params.add(new BasicNameValuePair("username","liuxiaomin"));
            //params.add(new BasicNameValuePair("date","03/11/2014"));

            try {
                httpPost.setEntity(new UrlEncodedFormEntity(params, "utf-8"));
                //httpClient.getParams().setParameter("http.connection.timeout",30000);
                //httpClient.getParams().setParameter("http.socket.timeout", 10000);
                HttpResponse httpResponse=httpClient.execute(httpPost);
                String json= EntityUtils.toString(httpResponse.getEntity(), "utf-8");
                json="{\"schedule\":"+json+"}";
                JSONObject jsonObject= new JSONObject(json);
                jsonArray = jsonObject.getJSONArray("schedule");
                ScheduleActivity.this.loadSchedule();
            }
            catch (JSONException e) {
                e.printStackTrace();  //To change body of catch statement use File | Settings | File Templates.
                ScheduleActivity.this.showLoadScheduleFailure();
            }
            catch (IOException e) {
                e.printStackTrace();  //To change body of catch statement use File | Settings | File Templates.
                ScheduleActivity.this.showLoadScheduleFailure();
            }
        }
    }

post方法

public class ShowCourseInfoThread implements Runnable　　//获得某节课的信息，采用get方法
    {
        public ShowCourseInfoThread()
        {

        }

        @Override
        public void run()
        {
            HttpClient httpClient=new DefaultHttpClient();
            String targetUrl =stringThings.getServerURL()+"/Schedule/QueryScheduleById";
            //String targetUrl ="http://10.0.2.2:1034/Schedule/QueryScheduleById";

            List> list=getCourses();
            Map map=list.get(index);
            List params = new ArrayList();
            params.add(new BasicNameValuePair("id",map.get("id").toString()));

            try {
                HttpGet httpGet = new HttpGet(targetUrl+"?"+ URLEncodedUtils.format(params,"utf-8"));
                HttpResponse httpResponse=httpClient.execute(httpGet);
                String json= EntityUtils.toString(httpResponse.getEntity(), "utf-8");
                json="{\"teacher\":"+json+"}";
                JSONObject jsonObject= new JSONObject(json).getJSONObject("teacher");
                teacherName=jsonObject.getString("ManagerName");
                ScheduleActivity.this.showCourseInfo();
            }
            catch (JSONException e) {
                e.printStackTrace();  //To change body of catch statement use File | Settings | File Templates.
                ScheduleActivity.this.showCourseInfoFailure();
            }
            catch (IOException e) {
                e.printStackTrace();  //To change body of catch statement use File | Settings | File Templates.
                ScheduleActivity.this.showCourseInfoFailure();
            }
        }
    }