如何使用kso​​ap2連接到使用android應用程序項目的web服務？

Question

我我如何連接到使用kso​​ap2 我的代碼的Web服務有問題：

import android.os.Bundle; 
import android.app.Activity; 
import android.view.Menu; 

import org.ksoap2.SoapEnvelope; 
import org.ksoap2.serialization.PropertyInfo; 
import org.ksoap2.serialization.SoapObject; 
import org.ksoap2.serialization.SoapPrimitive; 
import org.ksoap2.serialization.SoapSerializationEnvelope; 
import org.ksoap2.transport.*; 
import org.ksoap2.transport.HttpTransportSE; 
import android.widget.TextView; 


public class FirstScreen extends Activity { 

private static final String SOAP_ACTION = "http://tempuri.org/CelsiusToFahrenheit"; 
private static final String METHOD_NAME = "CelsiusToFahrenheit"; 
private static final String NAMESPACE = "http://tempuri.org/"; 
private static final String URL = "http://www.w3schools.com/webservices/tempconvert.asmx"; 
TextView tv; 

@Override 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_first_screen); 
    tv= (TextView)findViewById(R.id.TextView01); 

    SoapObject Request = new SoapObject(NAMESPACE, METHOD_NAME); 
    Request.addProperty("Celsius", "32"); 

    SoapSerializationEnvelope soapEnvelope = new SoapSerializationEnvelope(SoapEnvelope.VER10); 
    soapEnvelope.dotNet =true; 
    soapEnvelope.setOutputSoapObject(Request); 

    HttpTransportSE bah = new HttpTransportSE(URL); 

    try 
    { 
     bah.call(SOAP_ACTION, soapEnvelope); 
     SoapPrimitive resultString = (SoapPrimitive)soapEnvelope.getResponse(); 
     tv.setText("status: " + resultString); 

    } 
    catch (Exception e) 
    { 
     e.printStackTrace(); 
    } 

} 

} 

它說應用MyTest的（過程com.falafel.mytest））已意外停止！ :(

我的錯誤！

10-10 13:14:06.690: E/dalvikvm(279): Could not find class 'org.ksoap2.serialization.SoapObject', referenced from method com.falafel.mytest.FirstScreen.onCreate 
10-10 13:14:06.690: W/dalvikvm(279): VFY: unable to resolve new-instance 501 (Lorg/ksoap2/serialization/SoapObject;) in Lcom/falafel/mytest/FirstScreen; 
10-10 13:14:06.690: D/dalvikvm(279): VFY: replacing opcode 0x22 at 0x0012 
10-10 13:14:06.690: D/dalvikvm(279): VFY: dead code 0x0014-005a in Lcom/falafel/mytest/FirstScreen;.onCreate (Landroid/os/Bundle;)V 
10-10 13:14:06.870: W/Resources(279): Converting to string: TypedValue{t=0x12/d=0x0 a=2 r=0x7f070000} 
10-10 13:14:06.890: D/AndroidRuntime(279): Shutting down VM 
10-10 13:14:06.890: W/dalvikvm(279): threadid=1: thread exiting with uncaught exception (group=0x4001d800) 
10-10 13:14:06.920: E/AndroidRuntime(279): FATAL EXCEPTION: main 
10-10 13:14:06.920: E/AndroidRuntime(279): java.lang.NoClassDefFoundError: org.ksoap2.serialization.SoapObject 
10-10 13:14:06.920: E/AndroidRuntime(279): at com.falafel.mytest.FirstScreen.onCreate(FirstScreen.java:32) 
10-10 13:14:06.920: E/AndroidRuntime(279): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 
10-10 13:14:06.920: E/AndroidRuntime(279): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627) 
10-10 13:14:06.920: E/AndroidRuntime(279): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679) 
10-10 13:14:06.920: E/AndroidRuntime(279): at android.app.ActivityThread.access$2300(ActivityThread.java:125) 
10-10 13:14:06.920: E/AndroidRuntime(279): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033) 
10-10 13:14:06.920: E/AndroidRuntime(279): at android.os.Handler.dispatchMessage(Handler.java:99) 
10-10 13:14:06.920: E/AndroidRuntime(279): at android.os.Looper.loop(Looper.java:123) 
10-10 13:14:06.920: E/AndroidRuntime(279): at android.app.ActivityThread.main(ActivityThread.java:4627) 
10-10 13:14:06.920: E/AndroidRuntime(279): at java.lang.reflect.Method.invokeNative(Native Method) 
10-10 13:14:06.920: E/AndroidRuntime(279): at java.lang.reflect.Method.invoke(Method.java:521) 
10-10 13:14:06.920: E/AndroidRuntime(279): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868) 
10-10 13:14:06.920: E/AndroidRuntime(279): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) 
10-10 13:14:06.920: E/AndroidRuntime(279): at dalvik.system.NativeStart.main(Native Method) 
10-10 13:14:11.240: I/Process(279): Sending signal. PID: 279 SIG: 9 

任何幫助將appriciated，謝謝

Answer 1

你都做到了

項目>屬性> Java構建路徑>訂單和出口>和最後，勾選導入的KSOAP2庫。

此外，不要使用UI線程上的Web服務，請考慮服務或AsyncTask

Answer 2

在Android中使用ksoap2有時可能會遇到挑戰。正如ThePCWizard正確地建議最好使用AsyncTask在後臺線程上執行所有與網絡有關的任務。

您得到java.lang.NoClassDefFoundError可能表明ksoap.jar未被您的Android項目識別。

假設您安裝了最新的ADT version，您需要在Android項目的libs文件夾中添加.jar文件。之後，右鍵單擊.jar文件- >構建路徑 - >添加構建路徑。

清理您的項目並嘗試運行該應用程序。它應該刪除類定義未找到的錯誤。

我在一段時間後實現了類似的應用程序。這裏是link。

希望它有幫助！