Android開發之使用Web Service進行網絡編程 · Android開發高手進階

## 使用Web Service進行網絡編程 Android應用通常都是運行在手機平臺上，手機系統的硬件資源是有限的，不管是存儲能力還是計算能力都有限，在Android系統上開發、運行一些單用戶、小型應用是可能的，但對于需要進行大量的數據處理、復雜計算的應用，還是只能部署在遠程服務器上，Android應用將只是充當這些應用的客戶端。為了讓Android應用與遠程服務器之間進行交互，可以借助子Java的RMI技術，但這要求遠程服務器程序必須采用Java實現；也可以借助于CORBA技術，但這種技術顯得過于復雜，除此之外，Web Service是一種不錯的選擇。 ## 1.Web Service 平臺概述 Web Service平臺主要涉及的技術有SOAP(Simple Object Access Protocol,簡單對象訪問協議），WSDL( Web Service Description Language，Web Service描述語言），UDDI(UniversalDescription, Description and Integration，統一描述、發現和整合協議）。 ### 1.1. SOAP （簡單對象訪問協議） SOAP (SimpleObject Access Protocol,簡單對象訪問協議）是一種具有擴展性的；XML消息協議。SOAP允許一個應用程序向另一個應用程序發送XML消息，SOAP消息是從SOAP發送者傳至SOAP接收者的單路消息，任何應用程序均可作為發送者或接收者。SOAP僅定義消息結構和消息處理的協議，與底層的傳輸協議獨立。因此，SOAP協議能通過HTTP, JMS 或SMTP協議傳輸。 SOAP依賴于XML文檔來構建，一條SOAP消息就是一份特定的XML文檔，SOAP消息包合如下三個主要元素： ?必需的<Envelope.../>根元素，SOAP消息對應的XML文檔以該元素作為根元素。 ?可選的<Header../>元素，包含SOAP消息的頭信息。 ?必需的<Body../>元素，包含所有的調用和響應信息。就目前的SOAP消息的結構來看，<Envelope.../>根元素的通常只能包含兩個子元素，第一個子元素是可選的<Header../>元素，第二個子元素是必需的<Body../>元素。 ### 1.2. WSDL（WebService描述語言） WSDL (WebService Description Language, Web Service描述語言)使用 XML描述Web Service，包括訪問和使用WebService所必需的信息，定義該Web Service的位置、功能及如何通信等描述信息。一般來說，只要調用者能夠獲取WebService對應的WSDL,就可以從中了解它所提供的服務及如何調用Web Service。因為一份WSDL文件淸晰地定義了三個方面的內容。 ?WHAT部分：用于定義Web Service所提供的操作（或方法），也就是Web Service能做些什么。由WSDL中的<types. ../>、<message…/>、和<portTyp…/>元素定義。 ?HOW部分：用于定義如何訪問Web Service,包括數據格式詳情和訪問Web Service操作的必要協議。也就是定義了如何訪問Web Service。 ?WHERE部分：用于定義Web Service位于何處，如何使用特定協議決定的網絡地址（如URL)指定。該部分使用<service.../>元素定義，可在WSDL文件的最后部分看到<service.../>元素。一份WSDL文檔通常可分為兩個部分： ?第一個部分定義了服務接口，它在WSDL中由<message.../>元素和<portType…/>兩個元素組成，其中<message.../>元素定義了操作的交互方式。而<portType…/>元素里則可包含任意數量的<operation.../>元素，每個<operation.../>元素代表一個允許遠程調用的操作（即方法）。 ?WSDL的第二個部分定義了服務實現，它在WSDL中由<binding.../>元素和 <service.../>兩個元素組成，其中<binding.../>定義使用特定的通信協議、數據編碼模型和底層通信協議，將Web Service服務接口定義映射到具體實現。而 <service.../>元素則包含一系列的<portType…/>子元素，< portType.../>子元素將會把綁定機制、服務訪問協議和端點地址結合在一起。 ### 1.3. UDDI（統一描述、發現和整合協議） UDDI (UniversalDescription, Description and Integration,統一描述、發現和整合協議）是一套信息注冊規范，它具有如下特點： ?基于Web。 ?分布式。 UDDI包括一組允許企業向外注冊WebService、以使其他企業發現訪問的實現標準。 UDDI的核心組件是UDDI注冊中心，它使用XML文件來描述企業及其提供的Web Service, 通過使用UDDI, Web Service提供者可以對外注冊Web Service,從而允許其他企業來調用該企業注冊的Web Service。Web Service提供者通過UDDI注冊中心的Web界面，將它所供的Web Service的信息加入UDDI注冊中心，該Web Service就可以被發現和調用。 Web Service使用者也通過UDDI注冊中心査找、發現自己所需的服務。當Web Service使用者找到自己所需的服務之后，可以將自己綁定到指定的Web Service提供者，再根據該 Web Service對應的WSDL文檔來調用對方的服務。 ## 2. 使用Android啟用調用Web Service Java本身提供了豐富的WebService支持，比如Sun公司制定的JAX-WS 2規范，還有 Apache開源組織所提供的Axis1、Axis2、CXF等，這些技術不僅可以用于非常方便地對外提供Web Service,也可以用于簡化Web Service的客戶端編程。對于手機等小型設備而言，它們的計算資源、存儲資源都十分有限，因此Android應用不大可能需要對外提供Web Service，Android應用通常只是充當Web Service的客戶端，調用遠程Web Serice。 Google為Android平臺開發WebService客戶端提供了 ksoap2-android項目，但這個項目并未直接集成在Android平臺中，還需要開發人員自行下載。 ### 2.1為Android應用增加ksoap2-android支持的下步驟。 1)登錄http://code.google.eom/p/ksoap2-android/站點，該站站點有介紹下載ksoap2-androi項目的方法。 2)下載 ksoap2-android項目的ksoap2-android-assembly-3.0.0-RC4.jar-with-dependencies. jar包。 3)將下載的jar包放到android項目的libs目錄下即可。為Android項目添加了ksoap2-android包之后，接下來借助???ksoap2-android項目來調用WebService所暴露出來的操作。 ### 2.2使用ksoap2-android調用Web Service操作的步驟如下： 1)創建HttpTransportSE對象，該對象用于調用WebService操作。 2)創建 SoapSerializationEnvelope對象。提示：從名稱來看SoapSerializationEnvelope代表一個SOAP消息封包；但ksoap2-android項目對 SoapSerializationEnvelope的處理比較特殊，它是HttpTransportSE調用WebService時信息的載體；客戶端需要傳入的參數，需要通過SoapSerializationEnvelope對象的bodyOut屬性傳給服務器；服務器響應生成的SOAP消息也通過該對象的body??Out屬性來獲取。 3)創建SoapObject對象，創建該對象時需要傳入所要調用WebService的命名空間、Web Service方法名。 4)如果有參數需要傳給Web Service服務器端，調用SoapObject對象的addProperty(Stringname，Object value)方法來設置參數，該方法的name參數指定參數名；value參數指定參數值。 5)調用SoapSerializationEnvelope的setOutputSoapObject()方法，或者直接對bodyOut屬性賦值，將前兩步創逆的SoapObject對象設為SoapSerializationEnvelope的傳出SOAP消息體。 6)調用對象的call()方法，并以SoapSerializationEnvelope作為參數調用遠程WebService。 7)調用完成后，訪問SoapSerializationEnvelope對象的bodyln屬性，該屬性返回一個SoapObject對象，該對象就代表了Web Service的返回消息。解析該SoapObject對象，即可獲取調用Web Service的返回值。 ### 2.3實例:調用Web Service實現天氣預報在開發天氣預報的Android應用之前，首先需要找到一個可以對外提供天氣預報的Web Service,通過搜索，發現http://webservice.webxml.com.cn/WebServices/WeatherWS.asmx站點可以對外提供天氣預報的WebService，因此程序將會調用該站點的Web Service來實現天氣預報。為了讓應用界面更加美觀，可以訪問http://www.webxml.com.cn/images/weather.zip下載各種天氣圖標，可以使用這些天氣圖標來美化應用。本程序主要需要調用如下三個Web Seivice操作：獲取省份。根據省份獲取城市。根據城市獲取天氣。為了調用上面的三個WebService應用程序提供如下工具類。 <table class="MsoTableGrid" border="1" cellspacing="0" cellpadding="0" style="border-collapse:collapse; border:none"><tbody><tr style=""><td width="568" valign="top" style="width:426.1pt; border:solid green 1.0pt; padding:0cm 5.4pt 0cm 5.4pt">publicclass WebServiceUtil{???//定義Web Service的命名空間???staticfinal StringSERVICE_NS ="http://WebXml.com.cn/";???//定義Web Service提供服務的URL???staticfinal StringSERVICE_URL =???????"http://webservice.webxml.com.cn/WebServices/WeatherWS.asmx";????//調用遠程Web Service獲取省份列表???publicstatic List<String> getProvinceList()???{???????//調用的方法???????final String methodName ="getRegionProvince";???????//創建HttpTransportSE傳輸對象???????final HttpTransportSE ht =new HttpTransportSE(SERVICE_URL);???????ht.debug =true;???????//使用SOAP1.1協議創建Envelop對象???????final SoapSerializationEnvelope envelope =???????????new SoapSerializationEnvelope(SoapEnvelope.VER11);???????//實例化SoapObject對象???????SoapObject soapObject =new SoapObject(SERVICE_NS, methodName);???????envelope.bodyOut = soapObject;???????//設置與.Net提供的Web Service保持較好的兼容性???????envelope.dotNet =true;??????????FutureTask<List<String>> task =new FutureTask<List<String>>(???????new Callable<List<String>>()???????{???????????@Override???????????public List<String> call()???????????????throws Exception???????????{???????????????//調用Web Service???????????????ht.call(SERVICE_NS + methodName, envelope);???????????????if (envelope.getResponse() !=null)???????????????{???????????????????//獲取服務器響應返回的SOAP消息???????????????????SoapObject result = (SoapObject) envelope.bodyIn;???????????????????SoapObject detail = (SoapObject) result.getProperty(???????????????????????methodName +"Result");???????????????????//解析服務器響應的SOAP消息。???????????????????returnparseProvinceOrCity(detail);???????????????}???????????????returnnull;???????????}???????});???????new Thread(task).start();???????try???????{???????????return task.get();???????}???????catch (Exception e)???????{???????????e.printStackTrace();???????}???????returnnull;???}????//根據省份獲取城市列表???publicstatic List<String> getCityListByProvince(String province)???{???????//調用的方法???????final String methodName ="getSupportCityString";???????//創建HttpTransportSE傳輸對象???????final HttpTransportSE ht =new HttpTransportSE(SERVICE_URL);???????ht.debug =true;???????//實例化SoapObject對象???????SoapObject soapObject =new SoapObject(SERVICE_NS, methodName);???????//添加一個請求參數???????soapObject.addProperty("theRegionCode", province);???????//使用SOAP1.1協議創建Envelop對象???????final SoapSerializationEnvelope envelope =???????????new SoapSerializationEnvelope(SoapEnvelope.VER11);???????envelope.bodyOut = soapObject;???????//設置與.Net提供的Web Service保持較好的兼容性???????envelope.dotNet =true;???????FutureTask<List<String>> task =new FutureTask<List<String>>(???????new Callable<List<String>>()???????{???????????@Override???????????public List<String> call()???????????????throws Exception???????????{???????????????//調用Web Service???????????????ht.call(SERVICE_NS + methodName, envelope);???????????????if (envelope.getResponse() !=null)???????????????{???????????????????//獲取服務器響應返回的SOAP消息???????????????????SoapObject result = (SoapObject) envelope.bodyIn;???????????????????SoapObject detail = (SoapObject) result.getProperty(???????????????????????methodName +"Result");???????????????????//解析服務器響應的SOAP消息。???????????????????returnparseProvinceOrCity(detail);???????????????}???????????????returnnull;???????????}???????});???????new Thread(task).start();???????try???????{???????????return task.get();???????}???????catch (Exception e)???????{???????????e.printStackTrace();???????}???????returnnull;???}????privatestatic List<String> parseProvinceOrCity(SoapObject detail)???{???????ArrayList<String> result =new ArrayList<String>();???????for (int i = 0; i < detail.getPropertyCount(); i++)???????{???????????//解析出每個省份???????????result.add(detail.getProperty(i).toString().split(",")[0]);???????}???????return result;???}????publicstatic SoapObject getWeatherByCity(String cityName)???{???????final String methodName ="getWeather";???????final HttpTransportSE ht =new HttpTransportSE(SERVICE_URL);???????ht.debug =true;nbsp;??????final SoapSerializationEnvelope envelope =???????????new SoapSerializationEnvelope(SoapEnvelope.VER11);???????SoapObject soapObject =new SoapObject(SERVICE_NS, methodName);???????soapObject.addProperty("theCityCode", cityName);???????envelope.bodyOut = soapObject;???????//設置與.Net提供的Web Service保持較好的兼容性???????envelope.dotNet =true;???????FutureTask<SoapObject> task =new FutureTask<SoapObject>(???????new Callable<SoapObject>()???????{???????????@Override???????????public SoapObject call()???????????????throws Exception???????????{???????????????ht.call(SERVICE_NS + methodName, envelope);???????????????SoapObject result = (SoapObject) envelope.bodyIn;???????????????SoapObject detail = (SoapObject) result.getProperty(???????????????????methodName +"Result");???????????????return detail;???????????}???????});???????new Thread(task).start();???????try???????{???????????return task.get();???????}???????catch (Exception e)???????{???????????e.printStackTrace();???????}???????returnnull;???}}?</td></tr></tbody></table> 上面的程序調用Web Service的方法還是沒有改變，前面兩個方法——獲取系統支持的省份列表，根據省份獲取城市列表——將遠程Web Service返回的數據解析成List<String>后返回，這樣方便Android應用使用。由于第二個方法需要返回的數據量較多，所以程序直接返回了 SoapObject 對象。上面的程序中調用WebService時將SoapSerializationEnvelope對象的dotNet屬性設為 true——因為上面這個網站是通過.NET來對外提供WebService的，因此需要將 SoapSerializationEnvelope對象的 dotNet 屬性設為 true。有了上面的調用WebService的工具類之后，接下來可以在Activity中使用該工具類來獲取天氣服務信息。該Activity使用了兩個Spinner讓用戶選擇省份、城市，當用戶選擇指定城市后，系統將會加載該程序的天氣信息。該程序的界面布局代碼如下： <table class="MsoTableGrid" border="1" cellspacing="0" cellpadding="0" style="border-collapse:collapse; border:none"><tbody><tr style=""><td width="568" valign="top" style="width:426.1pt; border:solid windowtext 1.0pt; padding:0cm 5.4pt 0cm 5.4pt"><?xmlversion="1.0"encoding="utf-8"?><LinearLayoutxmlns:android="http://schemas.android.com/apk/res/android"???android:orientation="vertical"???android:layout_width="fill_parent"???android:layout_height="wrap_content">???<LinearLayout???????android:layout_width="fill_parent"???????android:layout_height="wrap_content"???????android:orientation="horizontal">???????<TextView???????????android:layout_width="wrap_content"???????????android:layout_height="wrap_content"???????????android:hint="@string/province"/>??????????????<Spinner???????????android:id="@+id/province"???????????android:layout_width="wrap_content"???????????android:layout_height="wrap_content"/>????????<TextView???????android:layout_width="wrap_content"???????android:layout_height="wrap_content"???????android:hint="@string/city"/>??????????????<Spinner???????????android:id="@+id/city"???????????android:layout_width="wrap_content"???????????android:layout_height="wrap_content"/>????</LinearLayout>???<TextView???android:id="@+id/weatherCurrent"???android:layout_width="fill_parent"???android:layout_height="wrap_content"/>??????<LinearLayout???????android:layout_width="fill_parent"???????android:layout_height="wrap_content">???????<ImageView???????????android:id="@+id/todayWhIcon1"???????????android:layout_width="wrap_content"???????????android:layout_height="wrap_content"/>???????<ImageView???????????android:id="@+id/todayWhIcon2"???????????android:layout_width="wrap_content"???????????android:layout_height="wrap_content"/>???????<TextView???????????android:id="@+id/weatherToday"???????????android:layout_width="fill_parent"???????????android:layout_height="wrap_content"???????????android:layout_weight="1"/>???</LinearLayout>??????<LinearLayout???????android:layout_width="fill_parent"???????android:layout_height="wrap_content">???????<ImageView???????????android:id="@+id/tomorrowWhIcon1"???????????android:layout_width="wrap_content"???????????android:layout_height="wrap_content"/>???????<ImageView???????????android:id="@+id/tomorrowWhIcon2"???????????android:layout_width="wrap_content"???????????android:layout_height="wrap_content"/>???????<TextView???????????android:id="@+id/weatherTomorrow"???????????android:layout_width="fill_parent"???????????android:layout_height="wrap_content"???????????android:layout_weight="1"/>???</LinearLayout>??????<LinearLayout???????android:layout_width="fill_parent"???????android:layout_height="wrap_content">???????<ImageView???????????android:id="@+id/afterdayWhIcon1"???????????android:layout_width="wrap_content"???????????android:layout_height="wrap_content"/>???????<ImageView???????????android:id="@+id/afterdayWhIcon2"???????????android:layout_width="wrap_content"???????????android:layout_height="wrap_content"/>???????<TextView???????????android:id="@+id/weatherAfterday"???????????android:layout_width="fill_parent"???????????android:layout_height="wrap_content"???????????android:layout_weight="1"/>???</LinearLayout>?</LinearLayout>?</td></tr></tbody></table> 當程序加載時，程序會調用WebServiceUtil的getProvinceList()方法來獲取省份列表，并使用第一個Spinner加載、顯示所有省份：當用戶改變選擇了省份之后，程序會調用 WebServiceUtil的getCityListByProvince(Stringprovince)方法來獲取該省份的全部城市：當用戶改變選擇城市之后，程序會調用WebServiceUtil的getWeatherByCity(StringcityName)方法獲取該城市的天氣。該Activity的代碼如下: <table class="MsoTableGrid" border="1" cellspacing="0" cellpadding="0" style="border-collapse:collapse; border:none"><tbody><tr style=""><td width="568" valign="top" style="width:426.1pt; border:solid windowtext 1.0pt; padding:0cm 5.4pt 0cm 5.4pt">publicclass GetWeatherextends Activity{???private SpinnerprovinceSpinner;???private SpinnercitySpinner;???private ImageViewtodayWhIcon1;???private ImageViewtodayWhIcon2;???private TextViewtextWeatherToday;???private ImageViewtomorrowWhIcon1;???private ImageViewtomorrowWhIcon2;???private TextViewtextWeatherTomorrow;???private ImageViewafterdayWhIcon1;???private ImageViewafterdayWhIcon2;???private TextViewtextWeatherAfterday;???private TextViewtextWeatherCurrent;????@Override???publicvoid onCreate(Bundle savedInstanceState)???{???????super.onCreate(savedInstanceState);???????setContentView(R.layout.main);????????todayWhIcon1 = (ImageView) findViewById(R.id.todayWhIcon1);???????todayWhIcon2 = (ImageView) findViewById(R.id.todayWhIcon2);???????textWeatherToday = (TextView) findViewById(R.id.weatherToday);???????tomorrowWhIcon1 = (ImageView) findViewById(R.id.tomorrowWhIcon1);???????tomorrowWhIcon2 = (ImageView) findViewById(R.id.tomorrowWhIcon2);???????textWeatherTomorrow = (TextView) findViewById(R.id.weatherTomorrow);???????afterdayWhIcon1 = (ImageView) findViewById(R.id.afterdayWhIcon1);???????afterdayWhIcon2 = (ImageView) findViewById(R.id.afterdayWhIcon2);???????textWeatherAfterday = (TextView) findViewById(R.id.weatherAfterday);???????textWeatherCurrent = (TextView) findViewById(R.id.weatherCurrent);????????//獲取程序界面中選擇省份、城市的Spinner組件???????provinceSpinner = (Spinner) findViewById(R.id.province);???????citySpinner = (Spinner) findViewById(R.id.city);???????//調用遠程Web Service獲取省份列表???????List<String> provinces = WebServiceUtil.getProvinceList();???????ListAdapter adapter =new ListAdapter(this, provinces);???????//使用Spinner顯示省份列表???????provinceSpinner.setAdapter(adapter);???????//當省份Spinner的選擇項被改變時???????provinceSpinner.setOnItemSelectedListener(new OnItemSelectedListener()???????{???????????@Override???????????publicvoid onItemSelected(AdapterView<?> source, View parent,???????????????int position,long id)???????????{???????????????List<String> cities = WebServiceUtil???????????????????.getCityListByProvince(provinceSpinner.getSelectedItem()???????????????????????.toString());???????????????ListAdapter cityAdapter =new ListAdapter(GetWeather.this,???????????????????cities);???????????????//使用Spinner顯示城市列表???????????????citySpinner.setAdapter(cityAdapter);???????????}????????????@Override???????????publicvoid onNothingSelected(AdapterView<?> arg0)???????????{???????????}???????});???????//當城市Spinner的選擇項被改變時???????citySpinner.setOnItemSelectedListener(new OnItemSelectedListener()???????{???????????@Override???????????publicvoid onItemSelected(AdapterView<?> source, View parent,???????????????int position,long id)???????????{???????????????showWeather(citySpinner.getSelectedItem().toString());???????????}????????????@Override???????????publicvoid onNothingSelected(AdapterView<?> arg0)???????????{???????????}???????});???}????privatevoid showWeather(String city)???{???????String weatherToday =null;???????String weatherTomorrow =null;???????String weatherAfterday =null;???????String weatherCurrent =null;???????int iconToday[] =newint[2];???????int iconTomorrow[] =newint[2];???????int iconAfterday[] =newint[2];???????//獲取遠程Web Service返回的對象???????SoapObject detail = WebServiceUtil.getWeatherByCity(city);????????????//獲取天氣實況???????weatherCurrent = detail.getProperty(4).toString();???????//解析今天的天氣情況???????String date = detail.getProperty(7).toString();???????weatherToday ="今天：" + date.split(" ")[0];???????weatherToday = weatherToday +"\n天氣：" + date.split(" ")[1];???????weatherToday = weatherToday +"\n氣溫："???????????+ detail.getProperty(8).toString();???????weatherToday = weatherToday +"\n風力："???????????+ detail.getProperty(9).toString() +"\n";???????iconToday[0] = parseIcon(detail.getProperty(10).toString());???????iconToday[1] = parseIcon(detail.getProperty(11).toString());???????//解析明天的天氣情況???????date = detail.getProperty(12).toString();???????weatherTomorrow ="明天：" + date.split(" ")[0];???????weatherTomorrow = weatherTomorrow +"\n天氣：" + date.split(" ")[1];???????weatherTomorrow = weatherTomorrow +"\n氣溫："???????????+ detail.getProperty(13).toString();???????weatherTomorrow = weatherTomorrow +"\n風力："???????????+ detail.getProperty(14).toString() +"\n";???????iconTomorrow[0] = parseIcon(detail.getProperty(15).toString());???????iconTomorrow[1] = parseIcon(detail.getProperty(16).toString());???????//解析后天的天氣情況???????date = detail.getProperty(17).toString();???????weatherAfterday ="后天：" + date.split(" ")[0];???????weatherAfterday = weatherAfterday +"\n天氣：" + date.split(" ")[1];???????weatherAfterday = weatherAfterday +"\n氣溫："???????????+ detail.getProperty(18).toString();???????weatherAfterday = weatherAfterday +"\n風力："???????????+ detail.getProperty(19).toString() +"\n";???????iconAfterday[0] = parseIcon(detail.getProperty(20).toString());???????iconAfterday[1] = parseIcon(detail.getProperty(21).toString());???????//更新當天的天氣實況???????textWeatherCurrent.setText(weatherCurrent);???????//更新顯示今天天氣的圖標和文本框???????textWeatherToday.setText(weatherToday);???????todayWhIcon1.setImageResource(iconToday[0]);???????todayWhIcon2.setImageResource(iconToday[1]);???????//更新顯示明天天氣的圖標和文本框???????textWeatherTomorrow.setText(weatherTomorrow);???????tomorrowWhIcon1.setImageResource(iconTomorrow[0]);???????tomorrowWhIcon2.setImageResource(iconTomorrow[1]);???????//更新顯示后天天氣的圖標和文本框???????textWeatherAfterday.setText(weatherAfterday);???????afterdayWhIcon1.setImageResource(iconAfterday[0]);???????afterdayWhIcon2.setImageResource(iconAfterday[1]);???}????//工具方法，該方法負責把返回的天氣圖標字符串，轉換為程序的圖片資源ID。???privateint parseIcon(String strIcon)???{???????if (strIcon ==null)???????????return -1;???????if ("0.gif".equals(strIcon))???????????return R.drawable.a_0;???????if ("1.gif".equals(strIcon))???????????return R.drawable.a_1;???????if ("2.gif".equals(strIcon))???????????return R.drawable.a_2;???????if ("3.gif".equals(strIcon))???????????return R.drawable.a_3;???????if ("4.gif".equals(strIcon))???????????return R.drawable.a_4;???????if ("5.gif".equals(strIcon))???????????return R.drawable.a_5;???????if ("6.gif".equals(strIcon))???????????return R.drawable.a_6;???????if ("7.gif".equals(strIcon))???????????return R.drawable.a_7;???????if ("8.gif".equals(strIcon))???????????return R.drawable.a_8;???????if ("9.gif".equals(strIcon))???????????return R.drawable.a_9;???????if ("10.gif".equals(strIcon))???????????return R.drawable.a_10;???????if ("11.gif".equals(strIcon))???????????return R.drawable.a_11;???????if ("12.gif".equals(strIcon))???????????return R.drawable.a_12;???????if ("13.gif".equals(strIcon))???????????return R.drawable.a_13;???????if ("14.gif".equals(strIcon))???????????return R.drawable.a_14;???????if ("15.gif".equals(strIcon))???????????return R.drawable.a_15;???????if ("16.gif".equals(strIcon))???????????return R.drawable.a_16;???????if ("17.gif".equals(strIcon))???????????return R.drawable.a_17;???????if ("18.gif".equals(strIcon))???????????return R.drawable.a_18;???????if ("19.gif".equals(strIcon))???????????return R.drawable.a_19;???????if ("20.gif".equals(strIcon))??????????return R.drawable.a_20;???????if ("21.gif".equals(strIcon))???????????return R.drawable.a_21;???????if ("22.gif".equals(strIcon))???????????return R.drawable.a_22;???????if ("23.gif".equals(strIcon))???????????return R.drawable.a_23;???????if ("24.gif".equals(strIcon))???????????return R.drawable.a_24;???????if ("25.gif".equals(strIcon))???????????return R.drawable.a_25;???????if ("26.gif".equals(strIcon))???????????return R.drawable.a_26;???????if ("27.gif".equals(strIcon))???????????return R.drawable.a_27;???????if ("28.gif".equals(strIcon))???????????return R.drawable.a_28;???????if ("29.gif".equals(strIcon))???????????return R.drawable.a_29;???????if ("30.gif".equals(strIcon))???????????return R.drawable.a_30;???????if ("31.gif".equals(strIcon))???????????return R.drawable.a_31;???????return 0;???}?</td></tr></tbody></table> 上面的Activity代碼己經不再涉及調用WebService的代碼了，只是簡單地調用Web Service操作，解析Web Service返回的SOAP消息包，并把SOAP消息包中的數據顯示出來。未完待續..........