Android中调用WebService的实例（KSOAP2 ）

  经过两天的学习摸索，终于有点小成果，所以贴出来大家看看。没怎么写过 Java，如果代码中有错误请大家指正。

       我在开发过程中遇到的最棘手的一个问题就是，每次请求数据后返回的数据都是空的。针对这种现象我另起了一个线程专门负责发送请求和接收数据，果然问题解决了，虽然不知道是不是问题的症结所在，但总算有了个结果。废话不多说，直接上代码。

1.布局文件，很简洁，只有一个按钮

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:paddingBottom="@dimen/activity_vertical_margin"    android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    tools:context=".MainActivity" >    <Button        android:id="@+id/query_btn"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="Button" /></RelativeLayout>

2.程序源码：

package com.example.mywebserviceclient;import java.io.InputStream;import java.io.UnsupportedEncodingException;import java.lang.ref.WeakReference;import org.ksoap2.SoapEnvelope;import org.ksoap2.SoapFault;import org.ksoap2.serialization.SoapObject;import org.ksoap2.serialization.SoapSerializationEnvelope;import org.ksoap2.transport.HttpTransportSE;import android.util.Log;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;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.app.Activity;import android.view.Menu;public class MainActivity extends Activity {private TextView resultView;private Button queryButton;private String resultString;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);queryButton = (Button) findViewById(R.id.query_btn);queryButton.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {new Thread(runnable).start();}});}@Overridepublic 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;}private Handler mHandler = new MyHandler(this);//avoid handler leakprivate static class MyHandler extends Handler{    private final WeakReference<MainActivity> mActivity;    public MyHandler(MainActivity activity) {        mActivity = new WeakReference<MainActivity>(activity);    }    @Override    public void handleMessage(Message msg) {    Toast.makeText(mActivity.get(), mActivity.get().resultString, Toast.LENGTH_LONG).show();        super.handleMessage(msg);    }}Runnable runnable = new Runnable(){    @Override    public void run() {               Message msg = new Message();        // 查询信息try {getRemoteInfo(null);MainActivity.this.mHandler.sendMessage(msg);} catch (SoapFault e) {// TODO Auto-generated catch blocke.printStackTrace();}    }};public void getRemoteInfo(String phoneSec) throws SoapFault {// 命名空间String nameSpace = "http://WebXml.com.cn/";// 调用的方法名称String methodName = "getWeatherbyCityName";// EndPointString endPoint = "http://www.webxml.com.cn/webservices/weatherwebservice.asmx";// SOAP ActionString soapAction = "http://WebXml.com.cn/getWeatherbyCityName";// 指定WebService的命名空间和调用的方法名SoapObject rpc = new SoapObject(nameSpace, methodName);// 设置需调用WebService接口需要传入的两个参数mobileCode、userIdrpc.addProperty("theCityName", "北京");//rpc.addProperty("userId", "");// 生成调用WebService方法的SOAP请求信息,并指定SOAP的版本SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);envelope.bodyOut = rpc;// 设置是否调用的是dotNet开发的WebServiceenvelope.dotNet = true;// 等价于envelope.bodyOut = rpc;envelope.setOutputSoapObject(rpc);HttpTransportSE transport = new HttpTransportSE(endPoint);try {// 调用WebServicetransport.call(soapAction, envelope);} catch (Exception e) {e.printStackTrace();}//transport// 获取返回的数据SoapObject object = (SoapObject) envelope.getResponse();try {parseWeather(object);} catch (UnsupportedEncodingException e) {// TODO Auto-generated catch blocke.printStackTrace();}}private void parseWeather(SoapObject detail)throws UnsupportedEncodingException {String date = detail.getProperty(6).toString();String weatherToday;weatherToday = "今天：" + date.split(" ")[0];weatherToday = weatherToday + "\n天气：" + date.split(" ")[1];weatherToday = weatherToday + "\n气温："+ detail.getProperty(5).toString();weatherToday = weatherToday + "\n风力："+ detail.getProperty(7).toString() + "\n";System.out.println("weatherToday is " + weatherToday);resultString = weatherToday;}}

到此完毕，希望对大家有帮助！

注：

1.不要忘记引入ksoap2的Jar包。

2.不要忘记打开网络访问权限，<uses-permission android:name="android.permission.INTERNET"/>。

如果是刚学习webservice推荐大家阅读以下两篇文章;

http://blog.csdn.net/lyq8479/article/details/6420398

http://blog.csdn.net/lyq8479/article/details/6428288