Android call WebService instance analysis

The example of this article describes the method of calling WebService by android. Share it with everyone for your reference. The details are as follows:

WebService is a remote calling standard based on the SOAP protocol. Through webservice, different operating system platforms, different languages, and different technologies can be integrated. There is no library for calling WebService in the Android SDK, so you need to use a third-party SDK to call WebService. The PC version of WEbservice client libraries are very rich, such as Axis2, CXF, etc., but these development kits are too large for the Android system and may not be easily transplanted to the Android system. Therefore, these development kits are not within the scope of our consideration. There are some SDKs for WebService clients suitable for mobile phones. The more commonly used one is Ksoap2, which can be downloaded from http://code.google.com/p/ksoap2-android/downloads/list; the downloaded ksoap2-android-assembly-2.4 -jar-with-dependencies.jar package is copied to the lib directory of the Eclipse project. Of course, it can also be placed in other directories. At the same time, reference this jar package in the Eclipse project.

The java code is as follows:

package com.arg;
import java.util.ArrayList; 
import java.util.HashMap; 
import java.util.Iterator; 
import java.util.List; 
import java.util.Map; 
import java.util.Map.Entry; 
import android.app.Activity; 
import android.app.ProgressDialog; 
import android.os.Bundle; 
import android.os.Handler; 
import android.os.Message; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.widget.Button; 
import android.widget.EditText; 
import android.widget.ListView; 
import android.widget.SimpleAdapter; 
public class CallWebServiceActivity extends Activity {
  //显示结果的listview 
  ListView listView=null; 
  //输入文本框 
  EditText provinceEdit=null; 
  //用于存放数据的集合list 
  List<Map<String, Object>> data=null; 
  //提示对话框 
  ProgressDialog myDialog=null; 
  //搜索按钮 
  Button searchButton=null; 
 /** Called when the activity is first created. */
 @Override
 public void onCreate(Bundle savedInstanceState) { 
  super.onCreate(savedInstanceState); 
  setContentView(R.layout.main); 
  //获得文本输入框 
  provinceEdit=(EditText) this.findViewById(R.id.provinceEdit); 
  //获得搜索按钮
  searchButton=(Button) this.findViewById(R.id.searchButton);
  //为搜索按钮添加单击监听事件 
  searchButton.setOnClickListener(new OnClickListener(){
    public void onClick(View v) { 
     //响应按钮单击事件的函数 
     ResponseOnClick(); 
    }
  });
 }
 //响应按钮单击事件的函数 
 public void ResponseOnClick(){ 
  //创建一个线程 
  HttpThread thread=new HttpThread(handler); 
  //构造请求参数 
  HashMap <String ,Object> params=new HashMap<String ,Object>(); 
  try{ 
   CharSequence etValue=provinceEdit.getText(); 
   String name=""; 
   if(etValue!=null){ 
    //字符转码 
    name=new String(etValue.toString().getBytes(),"UTF-8");
   } 
   params.put("byProvinceName", name); 
  }catch(Exception ex){ 
   ex.printStackTrace(); 
  } 
  // 
  String url="http://webservice.webxml.com.cn/WebServices/WeatherWebService.asmx"; 
  // String url = "http://webservice.webxml.com.cn/WebServices/WeatherWebService.asmx"; 
  String nameSpace = "http://WebXml.com.cn/"; 
  String methodName = "getSupportCity"; 
  // 开始新线程进行WebService请求 
  thread.doStart(url, nameSpace, methodName, params); 
 } 
 /** 
 * 捕获消息队列 
 * 
 */
 Handler handler=new Handler(){ 
  public void handleMessage(Message m){ 
   ArrayList <String> myList=(ArrayList<String>)m.getData().getStringArrayList("data"); 
   if(myList !=null){ 
    if(data !=null){ 
     data.clear(); 
    }else{ 
     data=new ArrayList<Map <String, Object>>(); 
    } 
    for(int i=0;i<myList.size();i++){ 
     Map<String, Object> item=new HashMap<String, Object>(); 
     item.put("text", myList.get(i)); 
     data.add(item); 
    } 
    /** 
    * 列表显示 
    * 
    */
    SimpleAdapter simpleAdapter=new SimpleAdapter(CallWebServiceActivity.this
    ,data,R.layout.listlayout,new String[] {"text"},new int []{R.id.showData}); 
    listView=(ListView) findViewById(R.id.showListView); 
    listView.setAdapter(simpleAdapter); 
   } 
  } 
 }; 
 /** 
 * 线程类 
 * @author Administrator 
 * 
 */
 public class HttpThread extends Thread{ 
  private Handler handle=null; 
  String url=null; 
  String nameSpace=null; 
  String methodName=null; 
  HashMap <String ,Object> params=null; 
  ProgressDialog progressDialog=null; 
  //构造函数 
  public HttpThread(Handler hander){ 
   handle=hander; 
  } 
  /** 
  * 启动线程 
  */
  public void doStart(String url, String nameSpace, String methodName, 
     HashMap<String, Object> params) {
    // TODO Auto-generated method stub 
   this.url=url; 
   this.nameSpace=nameSpace; 
   this.methodName=methodName; 
   this.params=params; 
   progressDialog=ProgressDialog.show(CallWebServiceActivity.this, "提示","正在请求请稍等……", true); 
   this.start(); 
   } 
  /** 
  * 线程运行 
  */
  @Override
  public void run() { 
   // TODO Auto-generated method stub 
   System.out.println("jack"); 
   super.run(); 
   try{ 
    //web service请求 
    SoapObject result=(SoapObject) CallWebService(); 
    //构造数据 
    ArrayList<String> list=null; 
    if(result !=null && result.getPropertyCount() > 0){ 
     list=new ArrayList<String>(); 
     for(int i=0;i<result.getPropertyCount();i++){ 
      SoapPrimitive value=(SoapPrimitive) result.getProperty(i); 
      list.add(value.toString());
     } 
     //a取消进度对话框 
     progressDialog.dismiss(); 
     //构造消息 
     Message message=handle.obtainMessage(); 
     Bundle b=new Bundle(); 
     b.putStringArrayList("data", list);
     message.setData(b); 
     handle.sendMessage(message); 
    }
   }catch(Exception ex){
    ex.printStackTrace();
   }finally{
   }
  }
  /** 
  * 请求web service 
  */
  protected Object CallWebService(){ 
   String SOAP_ACTION = nameSpace + methodName; 
   //创建SoapObject实例 
   SoapObject request=new SoapObject(nameSpace,methodName); 
   //生成调用web service方法的soap请求消息 
   SoapSerializationEnvelope envelope=new SoapSerializationEnvelope(SoapEnvelope.VER11); 
   //设置.net web service 
   envelope.dotNet=true; 
   //发送请求 
   envelope.setOutputSoapObject(request); 
   //请求参数 
   if(params != null && !params.isEmpty() ){ 
    for(Iterator it=params.entrySet().iterator();it.hasNext();){ 
     Map.Entry e=(Entry) it.next(); 
     request.addProperty(e.getKey().toString(),e.getValue()); 
    } 
   }
   //
   AndroidHttpTransport androidHttpTrandsport=new AndroidHttpTransport(url);
   SoapObject result=null;
   try{
    //web service请求
    androidHttpTrandsport.call(SOAP_ACTION, envelope); 
    //得到返回结果
    result=(SoapObject) envelope.getResponse();
   }catch(Exception ex){
    ex.printStackTrace();
   } 
   return result; 
  } 
 } 
}

I hope this article will be helpful to everyone’s Android programming design.

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