循环调用异步任务？

我想循环调用一个异步任务，并并行执行几次。

我有一个项目列表，我将其分成较小的列表，每个列表中有10个项目。然后，对于每个小列表，我使用THREAD_POOL_EXECUTOR执行异步任务。

问题是，它不起作用。我在想这是因为每次将其传递给AsyncTask时，我都会使用相同的列表-并且我认为它可以作为参考传递。

我是否需要以某种方式动态创建新列表？

   //split the ListItems into 10s
        if (actualThumbs.size() > 10){

        List<List<ListItem>> parts = chopped(actualThumbs, 10); // this splits it into parts of 10
        List< ListItem > listToSend  = new ArrayList<ListItem>(); //this is the list to pass
    for(int i = 0; i < parts.size(); i++){ //for every part


        for(int x = 0; x < parts.get(i).size(); x++){ //for everything in that part
            //add to its own List
            listToSend.add(parts.get(i).get(x));

        }
        //this is the async task
        loadActualThumbs thumbs = new loadActualThumbs();
        //execute multiple threads
        thumbs.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR,listToSend );
        listToSend.clear(); //clearing the list ready for a new one - PROBLEM?
     }
    }
    else
    {
        //else just execute AsyncTask normally, this works OK
        loadActualThumbs thumbs = new loadActualThumbs();
        thumbs.execute(actualThumbs);
    }

编辑：
我尝试更改我的代码，以代替将要发送到异步任务的每个列表添加到另一个列表，然后遍历该列表列表并发送每个列表：

 if (actualThumbs.size() > 10){

                List<List<ListItem>> parts = chopped(actualThumbs, 10);
                List< ListItem > listToSend  = new ArrayList<ListItem>();
                List<List<ListItem>> sendMe = new ArrayList<List<ListItem>>();
            for(int i = 0; i < parts.size(); i++){ //for every part


                for(int x = 0; x < parts.get(i).size(); x++){ //for everything in that part
                    //add to its own ListItem?
                    listToSend.add(parts.get(i).get(x));

                }

                sendMe.add(listToSend);// add the List to this List
                listToSend.clear();
             }

                for(int e = 0; e<sendMe.size();e++){ //loop through the list of lists

                    loadActualThumbs thumbs = new loadActualThumbs();
                    //execute multiple threads?
                    thumbs.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR,sendMe.get(e) ); // execute async with correct List
                }

            }

            else
            {
                if (actualThumbs.size() > 0){
                //load actual thumbnails
                loadActualThumbs thumbs = new loadActualThumbs();
                thumbs.execute(actualThumbs);
                }

            }