當從互聯網獲取數據時，應用程序凍結

我遇到了一個問題，我確信它解決起來非常簡單，但我仍然開始開發應用程序，所以我認爲你可以幫助我。我收到了一個應用程序，裏面有一個貨幣換算器，當我按下按鈕以獲得轉換時，它會凍結它從互聯網獲取數據並在數秒後恢復生命。這裏是代碼：當從互聯網獲取數據時，應用程序凍結

public void capturaConversao(String m1, String m2) throws ClientProtocolException, IOException { 
     BufferedReader resp = null; 
     endereco = "http://download.finance.yahoo.com/d/quotes.csv?s=" + m1 
       + m2 + "=X&f=sl1d1t1ba&e=.csv"; 
     try { 
      HttpClient client = new DefaultHttpClient(); 
      HttpGet method = new HttpGet(endereco); 
      HttpResponse statusCode = client.execute(method); 
      resp = new BufferedReader(new InputStreamReader(statusCode 
        .getEntity().getContent())); 
      StringBuffer sb = new StringBuffer(""); 
      String line = ""; 
      while ((line = resp.readLine()) != null) { 
       sb.append(line); 
      } 
      resp.close(); 
      String result = sb.toString(); 
      String[] values = result.split(","); 
      conversion = values[1]; 
      nextstep++; 

     } finally { 
      if (resp != null) { 
       try { 
        resp.close(); 
       } catch (IOException e) { 
        e.printStackTrace(); 
        Toast.makeText(getBaseContext(), "Não foi possível se conectar à internet.", Toast.LENGTH_SHORT).show(); 
       } 
      } 
     } 
    }

來源

2011-06-22 Thpramos