这是客户端 Android MainActivity.java文件：
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicHeader;
import org.apache.http.protocol.HTTP;
import org.json.JSONException;
import org.json.JSONStringer;
import android.os.Bundle;
import android.app.Activity;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
Log.e("oncreate ", "girdi");
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final EditText username = (EditText) findViewById(R.id.usernameEditText);
final EditText password = (EditText) findViewById(R.id.passwordEditText);
Button sendBtn = (Button) findViewById(R.id.sendBtn);
sendBtn.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
HttpPost request = new HttpPost("http://10.0.2.2:8732/Design_Time_Addresses/MyWCFSolution/Service1/Check");
request.setHeader("Accept", "application/json");
request.setHeader("Content-type", "application/json");
// Build JSON string
JSONStringer userJson=null;
try {
userJson = new JSONStringer()
.object()
.key("user")
.object()
.key("Username").value(username.getText().toString())
.key("Password").value(password.getText().toString())
.key("Name").value(password.getText().toString())
.endObject()
.endObject();
Log.e("json", "json created");
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
StringEntity entity=null;
try {
entity = new StringEntity(userJson.toString(),"UTF-8");
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
entity.setContentEncoding(new BasicHeader(HTTP.CONTENT_TYPE, "application/json"));
entity.setContentType("application/json");
request.setEntity(entity);
// Send request to WCF service
DefaultHttpClient httpClient = new DefaultHttpClient();
try {
Log.e("response", "connect");
HttpResponse response = httpClient.execute(request);
Log.e("response","response get"+response.toString());
//System.out.println(response.toString());
BufferedReader reader = new BufferedReader(new InputStreamReader(response.getEntity().getContent(), "UTF-8"));
String json = reader.readLine();
Log.e("json string","test "+json.toString()+" lazım");
System.out.println(json);
//JSONTokener tokener = new JSONTokener(json);
//JSONArray finalResult = new JSONArray(tokener);
}catch (Exception e){
e.printStackTrace();
}
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
}
服务器端：
应用程序配置：
<?xml version="1.0"?>
<configuration>
<appSettings>
<add key="aspnet:UseTaskFriendlySynchronizationContext" value="true"/>
</appSettings>
<system.web>
<compilation debug="true"/>
</system.web>
<!-- When deploying the service library project, the content of the config file must be added to the host's
app.config file. System.Configuration does not support config files for libraries. -->
<system.serviceModel>
<services>
<service name="MyWCFSolution.Service1">
<endpoint address="" binding="wsHttpBinding" contract="MyWCFSolution.IService1">
<identity>
<dns value="localhost"/>
</identity>
</endpoint>
<endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange"/>
<host>
<baseAddresses>
<add baseAddress="http://localhost:8732/Design_Time_Addresses/MyWCFSolution/Service1/"/>
</baseAddresses>
</host>
</service>
</services>
<behaviors>
<serviceBehaviors>
<behavior>
<!-- To avoid disclosing metadata information,
set the value below to false and remove the metadata endpoint above before deployment -->
<serviceMetadata httpGetEnabled="True"/>
<!-- To receive exception details in faults for debugging purposes,
set the value below to true. Set to false before deployment
to avoid disclosing exception information -->
<serviceDebug includeExceptionDetailInFaults="False"/>
</behavior>
</serviceBehaviors>
</behaviors>
</system.serviceModel>
<startup><supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/></startup></configuration>
服务.cs：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.Serialization;
using System.ServiceModel;
using System.Text;
using System.Web;
using System.Web.UI.WebControls;
namespace MyWCFSolution
{
// NOTE: You can use the "Rename" command on the "Refactor" menu to change the class name "Service1" in both code and config file together.
public class Service1 : IService1
{
public string CheckSQL(string getJSON)
{
string jsonConverted;
System.Web.Script.Serialization.JavaScriptSerializer serialize = new System.Web.Script.Serialization.JavaScriptSerializer();
User X = new User();
User Y = new User();
User Z = new User();
opUser operate = new opUser();
X.AutoID = 1;
X.Name = "abc";
X.Password = "12345";
X.Surname = "ab";
X.Username = "cde";
jsonConverted = serialize.Serialize(X);
Y = (User)serialize.Deserialize(jsonConverted, typeof(User));
Z = operate.GetUser(Y);
jsonConverted = serialize.Serialize(Z);
return "asdf";
}
}
}
IService.cs：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.Serialization;
using System.ServiceModel;
using System.Text;
using System.ServiceModel.Web;
namespace MyWCFSolution
{
[ServiceContract]
public interface IService1
{
[OperationContract]
string CheckSQL(User user);
}
}
用户.cs：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Collections;
namespace MyWCFSolution
{
public class User
{
private Int64 _AutoID;
private string _Username;
private string _Password;
private string _Name;
private string _Surname;
public Int64 AutoID { get { return _AutoID; } set { _AutoID = value; } }
public string Username { get { return _Username; } set { _Username = value; } }
public string Password { get { return _Password; } set { _Password = value; } }
public string Name { get { return _Name; } set { _Name = value; } }
public string Surname { get { return _Surname; } set { _Surname = value; } }
}
public class UserList : CollectionBase
{
public User this[int index]
{
get { return this.List[index] as User; }
}
public void Add(User obj)
{
this.List.Add(obj);
}
public int IndexOf(User obj)
{
return this.List.IndexOf(obj);
}
}
}
opUser.cs：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data.SqlClient;
using System.Data;
namespace MyWCFSolution
{
public class opUser
{
public User GetUser(User UserD)
{
UserList Result = new UserList();
System.Data.SqlClient.SqlConnection conn = Connection.ConnectToSql();
User temp = new User();
try
{
conn.Open();
SqlCommand sqlCommSelect = new SqlCommand("dbo.spSelectUserByPassword", conn);
sqlCommSelect.CommandType = CommandType.StoredProcedure;
SqlParameter[] sqlParams = new SqlParameter[] {
new SqlParameter("@Username",UserD.Username ),
new SqlParameter("@Password",UserD.Password )
};
sqlCommSelect.Parameters.AddRange(sqlParams);
SqlDataReader dr = sqlCommSelect.ExecuteReader();
while (dr.Read())
{
temp.Name = Convert.ToString(dr["Name"]);
temp.Surname = Convert.ToString(dr["Surname"]);
}
dr.Close();
conn.Close();
}
catch (Exception exx)
{
conn.Close();
Result = null;
}
return temp;
}
}
}
这是用于运行 Android 应用程序的 Eclipse 中的 LogCat：
01-11 22:50:43.344: E/oncreate(457): girdi 01-11 22:50:48.955: W/KeyCharacterMap(457): 没有 id 0 的键盘 01-11 22:50:48.955: W/KeyCharacterMap (457): 使用默认键盘映射: /system/usr/keychars/qwerty.kcm.bin 01-11 22:50:50.935: E/json(457): json created 01-11 22:50:50.944: E/response (457): 连接 01-11 22:50:51.164: E/response(457): response getorg.apache.http.message.BasicHttpResponse@405722d0 01-11 22:50:51.174: W/System.err(457) : java.lang.NullPointerException 01-11 22:50:51.184: W/System.err(457): at com.example.logapp.MainActivity$1.onClick(MainActivity.java:95) 01-11 22:50:51.184 : W/System.err(457): 在 android.view.View.performClick(View.java:2485) 01-11 22:50:51.184: W/System.err(457): 在 android.view.View。 onKeyUp(View.java:4257) 01-11 22:50:51.184: W/System.err(457): 在 android.widget.TextView.onKeyUp(TextView.java:4566) 01-11 22:50:51。184: W/System.err(457): 在 android.view.KeyEvent.dispatch(KeyEvent.java:1280) 01-11 22:50:51.184: W/System.err(457): 在 android.view.View .dispatchKeyEvent(View.java:3855) 01-11 22:50:51.184: W/System.err(457): 在 android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:789) 01-11 22:50:51.184 : W/System.err(457): 在 android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:789) 01-11 22:50:51.184: W/System.err(457): 在 android.view.ViewGroup。 dispatchKeyEvent(ViewGroup.java:789) 01-11 22:50:51.194: W/System.err(457): 在 android.view.ViewGroup.dispatchKeyEvent(ViewGroup.java:789) 01-11 22:50:51.194: W/System.err(457): 在 com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchKeyEvent(PhoneWindow.java:1687) 01-11 22:50:51.194: W/System.err(457):在 com.android.internal.policy.impl.PhoneWindow.superDispatchKeyEvent(PhoneWindow.java:1120) 01-11 22:50:51.194: W/System.err(457): 在 android.app.Activity.dispatchKeyEvent(Activity.java:2073) 01-11 22:50:51.194: W/System.err( 457): 在 com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchKeyEvent(PhoneWindow.java:1663) 01-11 22:50:51.194: W/System.err(457): 在 android.view.ViewRoot .deliverKeyEventToViewHierarchy(ViewRoot.java:2560) 01-11 22:50:51.194: W/System.err(457): 在 android.view.ViewRoot.handleFinishedEvent(ViewRoot.java:2535) 01-11 22:50:51.204 : W/System.err(457): 在 android.view.ViewRoot.handleMessage(ViewRoot.java:1867) 01-11 22:50:51.204: W/System.err(457): 在 android.os.Handler。 dispatchMessage(Handler.java:99) 01-11 22:50:51.204: W/System.err(457): 在 android.os.Looper.loop(Looper.java:123) 01-11 22:50:51.204: W/System.err(457): 在 android.app.ActivityThread.main(ActivityThread.java:3683) 01-11 22:50:51.204:W/System.err(457): 在 java.lang.reflect.Method.invokeNative(Native Method) 01-11 22:50:51.204: W/System.err(457): 在 java.lang.reflect.Method。调用（Method.java:507）01-11 22:50:51.215：W/System.err（457）：在 com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run（ZygoteInit.java:839）01-11 22:50:51.215: W/System.err(457): 在 com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597) 01-11 22:50:51.215: W/System.err(457 ): 在 dalvik.system.NativeStart.main(Native Method)java:597) 01-11 22:50:51.215: W/System.err(457): 在 dalvik.system.NativeStart.main(Native Method)java:597) 01-11 22:50:51.215: W/System.err(457): 在 dalvik.system.NativeStart.main(Native Method)
HTTP 正在执行。我的意思是，响应来自服务器，但我无法获取 JSON 数据。我尝试使用System.out.print但没有工作来编写 json 数据。Http 连接正常，但无法获取 JSON。为什么会这样？我在这个异常上工作了几天，但没有找到。有人知道吗？