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我正在使用 Aws SimpleDb 为我的 android 应用程序存储数据。使用 AWS android SDK，我得到了很晚的响应，有什么办法可以改进它，在浏览器中，它在 300 毫秒内获取数据对我来说它需要大约 5 到 10 秒的时间，虽然我正在发送仅请求 40 行。

这就是我正在做的事情。

 private ThreadPoolExecutor threadPool = new ThreadPoolExecutor(poolSize, maxPoolSize,  keepAliveTime, TimeUnit.SECONDS, threadsQueue);

private void getArticles() {

String[] categories = {"kids", "Boys", "Girls",
    "Men", "Women"};

for(final String category : categories) {
runTask(new Runnable() {

  @Override
  public void run() {
    Log.e(TAG, "getting articles for category : " + category);
    String select = "select * from shopDatabase where category = '" + category + "' AND relationType " +
          "= 'none' AND articlePushTime > '2013-04-01 05:46:03.719 GMT+00:00' AND publishDateTime > '2013-04-01 05:46:03.719 GMT+00:00' " +
          " AND score > '0' order by score  desc limit 40";
  SelectRequest selectRequest = new SelectRequest(select);
  selectRequest.setConsistentRead(true);
    List<Item> articles = sdbClient.select(selectRequest).getItems();
    if(articles != null) {
      Logger.log("ERROR", "SQLiteActivity", "articles size is : " + articles.size() + " for category : " + category, runCount);
    } else {
      Logger.log("ERROR", "SQLiteActivity", "articles size is : articles.size() = 0 OR NULL for category : " + category, runCount);
     }
     onDownload.onDownload();
    }
   });
  }
}

public void runTask(Runnable task) { futures.add(threadPool.submit(task)); // threadPool.execute(task); }

我试图对其进行分析，我发现解组需要花费大量时间，并且对于每个请求，它都会获取凭据。

日志响应时间：

 04-05 11:39:30.724: E/SQLiteActivity(14448): getting articles for category : kids
 04-05 11:39:49.914: E/SQLiteActivity(14448): articles size is : 40 for category : kids


 04-05 11:39:30.754: E/SQLiteActivity(14448): getting articles for category : Boys
 04-05 11:39:47.644: E/SQLiteActivity(14448): articles size is : 40 for category : Boys


 04-05 11:39:48.964: E/SQLiteActivity(14448): getting articles for category : Girls
 04-05 11:40:02.464: E/SQLiteActivity(14448): articles size is : 40 for category : Girls


 04-05 11:39:49.924: E/SQLiteActivity(14448): getting articles for category : Men
 04-05 11:40:02.724: E/SQLiteActivity(14448): articles size is : 40 for category : Men


 04-05 11:40:02.664: E/SQLiteActivity(14448): getting articles for category : Women
 04-05 11:40:10.024: E/SQLiteActivity(14448): articles size is : 40 for category : Women
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