對於類型InvoiceTemplateGet未定義方法execute（）

Question

我使用AsyncTask從API獲取結果。我有幾個工作正常的類。我已經創造了另一個的AsyncTask類，但我得到這個錯誤：

The method execute() is undefined for the type InvoiceTemplateGet 

在此行中：

InvoiceTemplateGet template = new InvoiceTemplateGet(PaymentMethodActivity.this, invoiceNumber); 
template.execute(); 

有類InvoiceTemplateGet：

public class InvoiceTemplateGet { 

    public InvoiceTemplateGet(Context context, String invoiceNumber){ 
     mContext = context; 
     this.invoiceNumber = invoiceNumber; 
     load_default_settings(); 
    } 


    protected CustomAsyncTaskResult<String> doInBackground(String... arg0) { 
     try{ 
      DefaultHttpClient httpclient = new DefaultHttpClient(); 
      HttpGet httpget = new HttpGet(url); 
      ResponseHandler<String> responseHandler = new BasicResponseHandler(); 
      String response = httpclient.execute(httpget,responseHandler); 
      return new CustomAsyncTaskResult<String>(response); 
     }catch (HttpResponseException e){ 
      return new CustomAsyncTaskResult<String>(new ApiException("Invoice", "Invoice was not found.")); 
     }catch (Exception e){ 
      Log.e("Invoice Error", "Error:", e); 
      return new CustomAsyncTaskResult<String>(new ApiException("Invoice", e.getMessage())); 
     } 
    } 

    protected void onPostExecute(CustomAsyncTaskResult<String> result) { 
     ((PaymentMethodActivity)mContext).getResultFromTemplate(result); 
     progressDialog.dismiss(); 
    } 
} 

我有另一類就像這個一樣，只是url不同而已。它像這個一樣在相同的頁面上執行，在相同的代碼部分。它的工作原理，爲什麼我仍然得到這個錯誤？

Answer 1

I have another class which is the same like this one, just url is different. It's executed on the same page like this one, on the same part of code. And it works, so why I'm still getting this error?

您InvoiceTemplateGet還沒有一個叫​​方法。看着你的代碼，它在我看來你忘了extend AsyncTask。你也可以創建execute（）方法來實例化內部AsyncTask並調用instance.execute()