Android如何設置超時延遲響應異步get方法

Question

我想設置超時，如果數據在15秒內無法獲取。我使用異步方法從服務器獲取數據。我嘗試了一些代碼中顯示的內容。我使用get(15000, TimeUnit.MILLISECONDS);，它等待15秒，並斷開連接，仍然可以在15秒內獲得數據。我還使用了定時器doInBackground()，但它有同樣的問題。 我想超時15秒，如果數據無法及時獲取，就會顯示'連接問題'對話框。請提前幫助我。

類

class GetTAsk extends AsyncTask<String, String, String> 
{ 
    @Override 
    protected String doInBackground(String... uri) { 

     //HttpParams params = new BasicHttpParams(); 
     //HttpConnectionParams.setConnectionTimeout(params,15000); 
     //HttpConnectionParams.setSoTimeout(params,15000); 
     //DefaultHttpClient client = new DefaultHttpClient(params); 

     HttpClient httpClient = new DefaultHttpClient(); 
     final HttpGet httpGet = new HttpGet(uri[0]); 
     //httpGet.setParams(params); 
     HttpResponse response = null; 
     String responseString = null; 
     requestTime = new Date(); 
     Log.i(l,"URL: "+uri[0]); 
     try { 

      response = httpClient.execute(httpGet); 
      Log.i(l,""+response.getStatusLine().toString()); 
      StatusLine statusLine = response.getStatusLine(); 
      if(statusLine.getStatusCode() == HttpStatus.SC_OK){ 
       ByteArrayOutputStream out = new ByteArrayOutputStream(); 
       response.getEntity().writeTo(out); 
       out.close(); 
       responseString = out.toString(); 
      } else{ 
       response.getEntity().getContent().close(); 
       throw new IOException(statusLine.getReasonPhrase()); 
      } 
     } catch (ClientProtocolException e) { 
      e.printStackTrace(); 
     } catch (IOException e) { 
      e.printStackTrace(); 
     } 

     /*new Timer().schedule(new TimerTask() {    
      @Override 
      public void run() { 
       // TODO Auto-generated method stub 
       httpGet.abort(); 
       Log.e("LOG","request aborted"); 
       progressBar.cancel(); 
       cancel(); 
      } 
     },1000); 
     */ 
     try { 
      get(1000, TimeUnit.MILLISECONDS); 
     } catch (InterruptedException e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
     } catch (ExecutionException e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
     } catch (TimeoutException e) { 
      // TODO Auto-generated catch block 
      e.printStackTrace(); 
     } 
     if (isCancelled()) { 
      Log.e("LOG","the task is cancelled"); 
      progressBar.cancel(); 
     } 
     return responseString; 
    } 

    @Override 
    protected void onPostExecute(String result) { 
     super.onPostExecute(result); 

    } 
} 

Answer 1

你必須調用httpClient.setParams（httpParameters）本工程..

HttpParams httpParameters = new BasicHttpParams(); 
HttpConnectionParams.setConnectionTimeout(httpParameters, timeoutConnection); 
HttpConnectionParams.setSoTimeout(httpParameters, timeoutSocket); 
DefaultHttpClient httpClient = new DefaultHttpClient(httpParameters); 
httpClient.setParams(httpParameters); 
HttpResponse response = httpClient.execute(httpGet); 

Answer 2

你必須使用彎

public Handler myTaskHandler; 
    Runnable Task = new Runnable() { 
     @Override 
     public void run() { 
     //your code 
     myTaskHandler.postDelayed(this, 1000); 
     } 
    } 

    @Override 
    public void onCreate(Bundle savedState) { 
     super.onCreate(savedState); 
     myTaskHandler = new Handler(); 
    } 
    //this is just as demo example, we will start the task when the activity is started. 
    @Override 
    public void onStart() { 
     super.onStart(); 
     myTaskHandler.postDelayed(myTask, 1000); 
    } 

    //at some point in your code you will probably want the handler to stop (in onStop is a good place) 
    @Override 
    public void onStop() { 
     super.onStop(); 
     myTaskHandler.removeCallbacks(myTask); 
    }