我已经创建了在本地机器上工作的webservice，并且我已经在android应用程序中成功使用它而没有任何错误。但是当我在在线服务器上托管我的web服务时，我遇到致命的错误异常。下面是我的android代码和错误日志。
错误日志： -
03-12 10:57:54.935: W/dalvikvm(7491): threadid=15: thread exiting with uncaught exception (group=0x420d8898)
03-12 10:57:54.935: E/AndroidRuntime(7491): FATAL EXCEPTION: AsyncTask #4
03-12 10:57:54.935: E/AndroidRuntime(7491): java.lang.RuntimeException: An error occured while executing doInBackground()
03-12 10:57:54.935: E/AndroidRuntime(7491): at android.os.AsyncTask$3.done(AsyncTask.java:299)
03-12 10:57:54.935: E/AndroidRuntime(7491): at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:352)
03-12 10:57:54.935: E/AndroidRuntime(7491): at java.util.concurrent.FutureTask.setException(FutureTask.java:219)
03-12 10:57:54.935: E/AndroidRuntime(7491): at java.util.concurrent.FutureTask.run(FutureTask.java:239)
03-12 10:57:54.935: E/AndroidRuntime(7491): at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230)
03-12 10:57:54.935: E/AndroidRuntime(7491): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080)
03-12 10:57:54.935: E/AndroidRuntime(7491): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573)
03-12 10:57:54.935: E/AndroidRuntime(7491): at java.lang.Thread.run(Thread.java:841)
03-12 10:57:54.935: E/AndroidRuntime(7491): Caused by: java.lang.NullPointerException
03-12 10:57:54.935: E/AndroidRuntime(7491): at com.example.test.MainActivity$MyAsyncTask1.doInBackground(MainActivity.java:106)
03-12 10:57:54.935: E/AndroidRuntime(7491): at com.example.test.MainActivity$MyAsyncTask1.doInBackground(MainActivity.java:1)
03-12 10:57:54.935: E/AndroidRuntime(7491): at android.os.AsyncTask$2.call(AsyncTask.java:287)
03-12 10:57:54.935: E/AndroidRuntime(7491): at java.util.concurrent.FutureTask.run(FutureTask.java:234)
03-12 10:57:54.935: E/AndroidRuntime(7491): ... 4 more
03-12 10:57:54.965: I/Process(7491): Sending signal. PID: 7491 SIG: 9
我的andorid代码： -
package com.example.test;
import org.ksoap2.SoapEnvelope;
import org.ksoap2.serialization.PropertyInfo;
import org.ksoap2.serialization.SoapObject;
import org.ksoap2.serialization.SoapSerializationEnvelope;
import org.ksoap2.transport.HttpTransportSE;
import android.support.v7.app.ActionBarActivity;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends ActionBarActivity {
EditText name;
TextView email;
Button Btnfetch;
String[] arr;
private Handler mHandler = new Handler();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
try
{
name = (EditText)findViewById(R.id.name);
email = (TextView)findViewById(R.id.email);
Btnfetch = (Button)findViewById(R.id.button1);
Btnfetch.setOnClickListener(new OnClickListener()
{
@Override
public void onClick(View v)
{
String sname = name.getText().toString();
String[] params = new String[]{"my_ip_address of webservice/",sname};
new MyAsyncTask1().execute(params);
}
});
}
catch(Exception ex)
{
//Message(ex);
Toast.makeText(this, "null", Toast.LENGTH_LONG).show();
}
}
class MyAsyncTask1 extends AsyncTask<String, Void, String>
{
public String SOAP_ACTION = "http://tempuri.org/Getemail";
public String OPERATION_NAME = "Getemail";
public String WSDL_TARGET_NAMESPACE = "http://tempuri.org/";
public String SOAP_ADDRESS;
private SoapObject request;
private HttpTransportSE httpTransport;
Object response = null;
//this method will fetch output from webservice
@Override
protected String doInBackground(String... params)
{
SOAP_ADDRESS = "http://"+params[0]+"PCGws.asmx";
request = new SoapObject(WSDL_TARGET_NAMESPACE, OPERATION_NAME);
PropertyInfo pi = new PropertyInfo();
pi.setName("Name");
pi.setValue(params[1]);
pi.setType(String.class);
request.addProperty(pi);
pi = new PropertyInfo();
SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);
envelope.dotNet = true;
envelope.setOutputSoapObject(request);
httpTransport = new HttpTransportSE(SOAP_ADDRESS);
try
{
httpTransport.call(SOAP_ACTION, envelope);
response = envelope.getResponse();
Log.d("result", response.toString());
}
catch(Exception exp)
{
response = exp.getMessage();
}
return response.toString();
}
protected void onPostExecute(final String result)
{
//result parameter should be final so that it can be use in cross thread operation
super.onPostExecute(result);
//we have to use async handler to make changes in view text
mHandler.post(new Runnable()
{
@Override
public void run()
{
arr=result.split(",");
email.setText(arr[0]);
}
});
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}