從WCF服務中讀取Android對象列表

我正在構建一個應用程序來檢索用戶事務的列表。但我不知道該怎麼做。從WCF服務中讀取Android對象列表

我試圖返回一個列表，但不知道如何從那裏繼續（讀取數據）

如果我的方式來閱讀對象的名單有誤，請告訴我謝謝。

這裏是我的Imobileservice代碼：

[ServiceContract] 
public interface ImobileServices 
{ 
    [OperationContract] 
    [WebInvoke(
     Method = "POST", 
     UriTemplate = "getTransaction", 
     BodyStyle = WebMessageBodyStyle.WrappedRequest, 
     ResponseFormat = WebMessageFormat.Json, 
     RequestFormat = WebMessageFormat.Json)] 
    List<salesOrder> retrieveTransaction(salesOrder salesorder); 
} 
[DataContract] 
public class salesOrder 
{ 
    [DataMember(Name = "NRIC")] 
    public string NRIC 
    { 
     get; 
     set; 
    } 
    [DataMember(Name = "ItemName")] 
    public string ItemName 
    { 
     get; 
     set; 
    } 

    [DataMember(Name = "Quantity")] 
    public string Quantity 
    { 
     get; 
     set; 
    } 

    [DataMember(Name = "ItemPrice")] 
    public string ItemPrice 
    { 
     get; 
     set; 
    } 

    [DataMember(Name = "ItemDescription")] 
    public string ItemDescription 
    { 
     get; 
     set; 
    } 

    [DataMember(Name = "Date")] 
    public string Date 
    { 
     get; 
     set; 
    } 
}

而且我mobileService代碼：

public List<salesOrder> retrieveTransaction(salesOrder salesorder) 
    { 
     List<salesOrder> newList = new List<salesOrder>(); 

     salesOrder order1 = new salesOrder(); 
     order1.ItemName = "item 1"; 
     order1.ItemDescription = "this is item 1"; 
     order1.ItemPrice = "40"; 
     order1.Quantity = "1"; 
     order1.Date = DateTime.Now.ToString(); 

     salesOrder order2 = new salesOrder(); 
     order2.ItemName = "item 2"; 
     order2.ItemDescription = "this is item 2"; 
     order2.ItemPrice = "30"; 
     order2.Quantity = "1"; 
     order2.Date = DateTime.Now.ToString(); 

     newList.Add(order1); 
     newList.Add(order2); 

     return newList; 
    }

我的Android代碼：

private class sendPostData extends AsyncTask<String, Void, String> 
{ 
    @Override 
    protected String doInBackground(String... params) { 
     // TODO Auto-generated method stub 
     HttpPost request = new HttpPost(SERVICE_URI + "/getTransaction"); 
     request.setHeader("Accept", "application/json");    
     request.setHeader("Content-type", "application/json"); 
     JSONStringer salesorder; 
     try { 
      salesorder = new JSONStringer() 
       .object() 
        .key("salesorder") 
         .object()        
          .key("NRIC").value(params[0]) 
         .endObject() 
        .endObject(); 

     StringEntity entity = new StringEntity(salesorder.toString()); 

     request.setEntity(entity); 

     // Send request to WCF service 
     DefaultHttpClient httpClient = new DefaultHttpClient(); 
     HttpResponse response = httpClient.execute(request); 

     HttpEntity responseEntity = response.getEntity(); 

     // Read response data into buffer 
     char[] buffer = new char[(int)responseEntity.getContentLength()]; 
     InputStream stream = responseEntity.getContent(); 
     InputStreamReader reader = new InputStreamReader(stream); 
     reader.read(buffer); 
     stream.close(); 

     //JSONObject salesOrderObject= new JSONObject(new String(buffer)); 
     } 
     catch (Exception e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
     } 

     refreshListView(); 
     return null; 
    }

最後我的logcat：

07-06 19:30:48.035: W/dalvikvm(21473): threadid=12: thread exiting with uncaught exception (group=0x40e20930) 
07-06 19:30:48.059: E/AndroidRuntime(21473): FATAL EXCEPTION: AsyncTask #1 
07-06 19:30:48.059: E/AndroidRuntime(21473): java.lang.RuntimeException: An error occured while executing doInBackground() 
07-06 19:30:48.059: E/AndroidRuntime(21473): at android.os.AsyncTask$3.done(AsyncTask.java:299) 
07-06 19:30:48.059: E/AndroidRuntime(21473): at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:352) 
07-06 19:30:48.059: E/AndroidRuntime(21473): at java.util.concurrent.FutureTask.setException(FutureTask.java:219) 
07-06 19:30:48.059: E/AndroidRuntime(21473): at java.util.concurrent.FutureTask.run(FutureTask.java:239) 
07-06 19:30:48.059: E/AndroidRuntime(21473): at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230) 
07-06 19:30:48.059: E/AndroidRuntime(21473): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080) 
07-06 19:30:48.059: E/AndroidRuntime(21473): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573) 
07-06 19:30:48.059: E/AndroidRuntime(21473): at java.lang.Thread.run(Thread.java:856) 
07-06 19:30:48.059: E/AndroidRuntime(21473): Caused by: android.view.ViewRootImpl$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views. 
07-06 19:30:48.059: E/AndroidRuntime(21473): at android.view.ViewRootImpl.checkThread(ViewRootImpl.java:4746) 
07-06 19:30:48.059: E/AndroidRuntime(21473): at android.view.ViewRootImpl.focusableViewAvailable(ViewRootImpl.java:2588) 
07-06 19:30:48.059: E/AndroidRuntime(21473): at android.view.ViewGroup.focusableViewAvailable(ViewGroup.java:608) 
07-06 19:30:48.059: E/AndroidRuntime(21473): at android.view.ViewGroup.focusableViewAvailable(ViewGroup.java:608) 
07-06 19:30:48.059: E/AndroidRuntime(21473): at android.view.ViewGroup.focusableViewAvailable(ViewGroup.java:608) 
07-06 19:30:48.059: E/AndroidRuntime(21473): at android.view.ViewGroup.focusableViewAvailable(ViewGroup.java:608) 
07-06 19:30:48.059: E/AndroidRuntime(21473): at android.view.ViewGroup.focusableViewAvailable(ViewGroup.java:608) 
07-06 19:30:48.059: E/AndroidRuntime(21473): at android.view.ViewGroup.focusableViewAvailable(ViewGroup.java:608) 
07-06 19:30:48.059: E/AndroidRuntime(21473): at android.view.View.setFlags(View.java:8417) 
07-06 19:30:48.059: E/AndroidRuntime(21473): at android.view.View.setFocusableInTouchMode(View.java:5790) 
07-06 19:30:48.059: E/AndroidRuntime(21473): at android.widget.AdapterView.checkFocus(AdapterView.java:717) 
07-06 19:30:48.059: E/AndroidRuntime(21473): at android.widget.ListView.setAdapter(ListView.java:463) 
07-06 19:30:48.059: E/AndroidRuntime(21473): at com.example.isellcrazyitem.Transaction.refreshListView(Transaction.java:65) 
07-06 19:30:48.059: E/AndroidRuntime(21473): at com.example.isellcrazyitem.Transaction.access$0(Transaction.java:62) 
07-06 19:30:48.059: E/AndroidRuntime(21473): at com.example.isellcrazyitem.Transaction$sendPostData.doInBackground(Transaction.java:153) 
07-06 19:30:48.059: E/AndroidRuntime(21473): at com.example.isellcrazyitem.Transaction$sendPostData.doInBackground(Transaction.java:1) 
07-06 19:30:48.059: E/AndroidRuntime(21473): at android.os.AsyncTask$2.call(AsyncTask.java:287) 
07-06 19:30:48.059: E/AndroidRuntime(21473): at java.util.concurrent.FutureTask.run(FutureTask.java:234) 
07-06 19:30:48.059: E/AndroidRuntime(21473): ... 4 more 
07-06 19:30:48.957: D/AndroidRuntime(21473): Shutting down VM 
07-06 19:30:48.957: W/dalvikvm(21473): threadid=1: thread exiting with uncaught exception (group=0x40e20930) 
07-06 19:30:48.957: I/Process(21473): Sending signal. PID: 21473 SIG: 9

來源

2013-07-06 Bloopie Bloops

其實logcat中的錯誤是因爲你在doInBackground中調用了refreshListView（），這是禁止的，因爲doInBackground在後臺線程中運行，你的listview必須從ui線程更新。將您的refreshListView（）放在您的asyncTask中的onPostExecute覆蓋內，看看如何去... – Christos

錯誤消失了，但我仍然不知道如何從WCF服務讀取我的列表 –

這就是爲什麼我沒有提供答案因爲我沒有對Android做過這樣的事情，所以我只是對我在logcat中注意到的事情發表評論。不過，這裏有很多專家，答案很快就會有信心:) – Christos

你有這樣的

refreshListView();

你大概從更新UI doInbackground這是不可能的。您需要從ui線程更新ui。

您可以使用runOnUiThread或在onPostExecute中執行此操作。

來源

2013-07-06 11:40:40 Raghunandan

ouch ..修復了它 –

但是仍然可以從android側讀取列表？ –

閱讀意思。你的asynctask是否在不同的課堂上，你想把價值返回到活動課堂上？ – Raghunandan

從WCF服務中讀取Android對象列表

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