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<Profile>(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：
post方法
get方法
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<BasicNameValuePair> params = new ArrayList<BasicNameValuePair>(); 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(); } } }
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<Map<String, Object>> list=getCourses(); Map<String,Object> map=list.get(index); List<BasicNameValuePair> params = new ArrayList<BasicNameValuePair>(); 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(); } } }
下面是我的客户端的截图：
