在AsyncTask中捕獲HttpUrlConnection的錯誤

Question

我正在尋找處理HttpURLConnection中的錯誤的最佳實踐，尤其是在主機不可用時。我怎麼不得不改變我的源？：

protected String doInBackground(String... strings) { 
    URL aURL; 
    String line; 
    HttpURLConnection connection; 
    BufferedReader reader; 
    StringBuilder stringBuilder = null; 
    try { 
     aURL = new URL(strings[0]); 
     connection = (HttpURLConnection) aURL.openConnection(); 


     InputStream aInputStream = connection.getInputStream(); 
     BufferedInputStream aBufferedInputStream = new BufferedInputStream(aInputStream); 

     reader = new BufferedReader(new InputStreamReader(connection.getInputStream())); 
     stringBuilder = new StringBuilder(); 

     while ((line = reader.readLine()) != null) 
     { 
      stringBuilder.append(line); 
     } 

    } catch (IOException e) { 
     Log.d("svc", e.toString()); 
    } 
    return stringBuilder.toString(); 
} 

Answer 1

你會得到使用connection.getResponseCode（）不同responsecode 檢查主機不可用，你將被設置的響應代碼。