Android 学习笔记之WebService实现远程调用+内部原理分析...

package com.example.webservice_web;

import java.io.IOException;

import org.ksoap2.SoapEnvelope;
import org.ksoap2.serialization.SoapObject;
import org.ksoap2.serialization.SoapSerializationEnvelope;
import org.ksoap2.transport.HttpTransportSE;
import org.xmlpull.v1.XmlPullParserException;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends Activity implements View.OnClickListener {

String NAMESPACE="http://WebXml.com.cn/";   //命名空间....
String url="http://www.webxml.com.cn/webservices/weatherwebservice.asmx"; //方法的url..
String METHOD_NAME="getWeatherbyCityName";                            //需要调用的方法名...
String SOAP_ACTION="http://WebXml.com.cn/getWeatherbyCityName";       //一般为命名空间+方法名称...

/**
*   上面这四种属性，我们可以通过方法的相关服务信息找到，相关信息其实就是WSDL文档..其中包含了上述信息的内容...
*   通过WSDL明确了方法调用时需要传递的相关参数，我们就可以调用这个远程方法了...
* */

String weatherToday;
SoapObject detail;       //接收函数的返回值...
String weatherNow;
String weatherWillBe;
private TextView tv;
private EditText et;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
et=(EditText) findViewById(R.id.et);
findViewById(R.id.bt).setOnClickListener(this);
}

@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 void onClick(View v) {
// TODO Auto-generated method stub
switch(v.getId()){
case R.id.bt:

tv=(TextView) findViewById(R.id.tv);
SoapObject rpc=new SoapObject(NAMESPACE, METHOD_NAME);
String cityname=et.getText().toString();
rpc.addProperty("theCityName", cityname);//添加参数..目的为了调用服务端提供的方法...
/*
* 实例化SoapSerializationEnvelope对象...
* */
SoapSerializationEnvelope envelope=new SoapSerializationEnvelope(SoapEnvelope.VER11);
envelope.bodyOut=rpc;
envelope.dotNet=true;
envelope.setOutputSoapObject(rpc);//设置输出的参数为rpc

HttpTransportSE ht=new HttpTransportSE(url);
ht.debug=true;
try {
// Toast.makeText(getBaseContext(), "aa", Toast.LENGTH_LONG).show();
ht.call(SOAP_ACTION, envelope);
Toast.makeText(getBaseContext(), "bb", Toast.LENGTH_LONG).show();
detail=(SoapObject) envelope.getResponse();
String date=detail.getProperty(6).toString();
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();
weatherNow=detail.getProperty(8).toString();
weatherWillBe=detail.getProperty(9).toString();
tv.setText(et.getText().toString()+weatherToday);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (XmlPullParserException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}

/**
* Creates a new <code>SoapObject</code> instance.
*
* @param namespace the namespace for the soap object
* @param name      the name of the soap object
*/

public SoapObject(String namespace, String name) {
this.namespace = namespace;
this.name = name;
}

/**
* Adds a property (parameter) to the object. This is essentially a sub element.
*
* @param name  The name of the property
* @param value the value of the property
*/
//源码的意思就是为这个SoapObject对象配置两个属性，一个是名字属性，一个是值属性...
public SoapObject addProperty(String name, Object value) {
PropertyInfo propertyInfo = new PropertyInfo();
propertyInfo.name = name;
propertyInfo.type = value == null ? PropertyInfo.OBJECT_CLASS : value.getClass();
propertyInfo.value = value;
return addProperty(propertyInfo);
}

/**
* Adds a property (parameter) to the object. This is essentially a sub element.
*
* @param propertyInfo designated retainer of desired property
*/
public SoapObject addProperty(PropertyInfo propertyInfo) {
properties.addElement(propertyInfo);
return this;
}

/**
* Adds the specified object at the end of this vector.
*
* @param object
*            the object to add to the vector.
*/
public synchronized void addElement(E object) {
if (elementCount == elementData.length) {
growByOne();
}
elementData[elementCount++] = object;
modCount++;
}

public SoapSerializationEnvelope(int version)
{
super(version);
addMapping(enc, ARRAY_MAPPING_NAME, PropertyInfo.VECTOR_CLASS);
DEFAULT_MARSHAL.register(this);
}

envelope.bodyOut=object;
envelope.dotNet=true;
envelope.setOutputSoapObject(object);

HttpTransportSE ht=new HttpTransportSE(url);
ht.debug=true;
try {
ht.call(SOAP_ACTION, envelope);
detail=(SoapObject) envelope.getResponse();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (XmlPullParserException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}