使用HTTP Post连接到ASP.NE Web服务（ANDROID） [英] Connecting to a ASP.NE Web Service with HTTP Post (ANDROID)
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问题描述
我的计算机本地托管了一个ASP.NET Web服务，我正在尝试使用Android应用程序来访问它。 />
这是代码：
Hi,
I have an ASP.NET web service hosted locally on my computer, and I am trying to get an Android application to access it.
This is the code:
<small></small> package com.example.projectmanager;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.net.HttpURLConnection;
import java.net.URL;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
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 android.app.Activity;
import android.content.Context;
import android.content.DialogInterface;
import android.content.DialogInterface.OnClickListener;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
public class MainActivity extends Activity {
private EditText username, password;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
username = (EditText) findViewById(R.id.txtUsername);
password = (EditText) findViewById(R.id.txtPassword);
Button loginButton = (Button)findViewById(R.id.btnLogin);
loginButton.setOnClickListener((android.view.View.OnClickListener) mAddListener);
}
@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;
}
public OnClickListener mAddListener = new OnClickListener(){
public void onClick(View v) {
String mUsername = username.getText().toString();
String mPassword = password.getText().toString();
tryLogin(mUsername, mPassword);}
@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
}
};
protected void tryLogin(String mUsername, String mPassword)
{
HttpURLConnection connection;
OutputStreamWriter request = null;
URL url = null;
String response = null;
String parameters = "userName="+mUsername+"&password="+mPassword;
try
{
url = new URL("http://localhost:65249/ThesisApp/WebService.asmx?op=Login");
connection = (HttpURLConnection) url.openConnection();
connection.setDoOutput(true);
connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
connection.setRequestMethod("POST");
request = new OutputStreamWriter(connection.getOutputStream());
request.write(parameters);
request.flush();
request.close();
String line = "";
InputStreamReader isr = new InputStreamReader(connection.getInputStream());
BufferedReader reader = new BufferedReader(isr);
StringBuilder sb = new StringBuilder();
while ((line = reader.readLine()) != null)
{
sb.append(line + "\n");
}
// Response from server after login process will be stored in response variable.
response = sb.toString();
// You can perform UI operations here
Toast.makeText(this,"Message from Server: \n"+ response, 0).show();
isr.close();
reader.close();
}
catch(IOException e)
{
// Error
}
}
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
}
}
每当我尝试运行它时我都会收到此错误：
Whenever I try to run it I get this error:
04-22 01:30:09.413: E/Trace(1358): error opening trace file: No such file or directory (2)
04-22 01:30:19.869: D/AndroidRuntime(1358): Shutting down VM
04-22 01:30:19.869: W/dalvikvm(1358): threadid=1: thread exiting with uncaught exception (group=0xb4fd5288)
04-22 01:30:19.919: E/AndroidRuntime(1358): FATAL EXCEPTION: main
04-22 01:30:19.919: E/AndroidRuntime(1358): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.projectmanager/com.example.projectmanager.MainActivity}: java.lang.ClassCastException: com.example.projectmanager.MainActivity$1 cannot be cast to android.view.View$OnClickListener
04-22 01:30:19.919: E/AndroidRuntime(1358): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2059)
04-22 01:30:19.919: E/AndroidRuntime(1358): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084)
04-22 01:30:19.919: E/AndroidRuntime(1358): at android.app.ActivityThread.access$600(ActivityThread.java:130)
04-22 01:30:19.919: E/AndroidRuntime(1358): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195)
04-22 01:30:19.919: E/AndroidRuntime(1358): at android.os.Handler.dispatchMessage(Handler.java:99)
04-22 01:30:19.919: E/AndroidRuntime(1358): at android.os.Looper.loop(Looper.java:137)
04-22 01:30:19.919: E/AndroidRuntime(1358): at android.app.ActivityThread.main(ActivityThread.java:4745)
04-22 01:30:19.919: E/AndroidRuntime(1358): at java.lang.reflect.Method.invokeNative(Native Method)
04-22 01:30:19.919: E/AndroidRuntime(1358): at java.lang.reflect.Method.invoke(Method.java:511)
04-22 01:30:19.919: E/AndroidRuntime(1358): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
04-22 01:30:19.919: E/AndroidRuntime(1358): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
04-22 01:30:19.919: E/AndroidRuntime(1358): at dalvik.system.NativeStart.main(Native Method)
04-22 01:30:19.919: E/AndroidRuntime(1358): Caused by: java.lang.ClassCastException: com.example.projectmanager.MainActivity$1 cannot be cast to android.view.View$OnClickListener
04-22 01:30:19.919: E/AndroidRuntime(1358): at com.example.projectmanager.MainActivity.onCreate(MainActivity.java:50)
04-22 01:30:19.919: E/AndroidRuntime(1358): at android.app.Activity.performCreate(Activity.java:5008)
04-22 01:30:19.919: E/AndroidRuntime(1358): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079)
04-22 01:30:19.919: E/AndroidRuntime(1358): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2023)
04-22 01:30:19.919: E/AndroidRuntime(1358): ... 11 more
安卓应用程序崩溃。
谁能告诉我发生了什么？
And the android application crashes.
Can anyone tell me what''s going on?
推荐答案
1无法转换为android.view.View
1 cannot be cast to android.view.View
OnClickListener
04-22 01:30： 19.919：E / AndroidRuntime（1358）：在android.app.ActivityThread.performLaunchActivity（Activ） ityThread.java:2059)
04-22 01：30：19.919：E / AndroidRuntime（1358）：在android.app.ActivityThread.handleLaunchActivity（ActivityThread.java:2084）
04-22 01： 30：19.919：E / AndroidRuntime（1358）：在android.app.ActivityThread.access
OnClickListener 04-22 01:30:19.919: E/AndroidRuntime(1358): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2059) 04-22 01:30:19.919: E/AndroidRuntime(1358): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084) 04-22 01:30:19.919: E/AndroidRuntime(1358): at android.app.ActivityThread.access
600（ActivityThread.java:130）
04-22 01：30：19.919 ：E / AndroidRuntime（1358）：在android.app.ActivityThread
600(ActivityThread.java:130) 04-22 01:30:19.919: E/AndroidRuntime(1358): at android.app.ActivityThread
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