java - 如何使用 get 方法从链表中获取元素

Question

我正在 android 中开发 radio 流应用程序，我的链接列表中有一个 url，它是来自 .pls 文件链接的已解析内容，我需要的是从 url 解析我需要获取的内容使用 get(position) 方法从我的链表中获取元素。任何人都可以在这里提出任何建议吗？我需要帮助。

这是一个代码 fragment ，我想使用链表中的 url 到 player=MediaPlayer.create(this,Uri.parse("//Url from linked list"));

我的链接列表中有来自 .pls 文件链接的已解析 url，我只需要从链接列表中获取元素链表对象

LinkedList<String> urls;

private LinkedList<String> fGetPlayableUrl( String mPls) {
        GetStreamingUrl oGetStreamingUrl = new GetStreamingUrl(MainActivity.this);
        urls=new LinkedList<String>();
        urls = oGetStreamingUrl.getStreamingUrl(mPls);


        return urls;
    }

private void initializeMediaPlayer() throws IOException {
        player = new MediaPlayer();


        //int i ;
       /* for (i=0;i<='\0';i++)
        {

        }*/
       //URL=urls.get(2).toString();
        try {
     player=MediaPlayer.create(this,Uri.parse("//url here"));

            player.setDataSource(URL);
            //player.prepareAsync();
            //player.start();

        } catch (IllegalArgumentException e) {
            e.printStackTrace();
        } catch (IllegalStateException e) {
            e.printStackTrace();
        }

        player.setOnBufferingUpdateListener(new OnBufferingUpdateListener() {

            public void onBufferingUpdate(MediaPlayer mp, int percent) {
                playSeekBar.setSecondaryProgress(percent);
                Log.i("Buffering", "" + percent);
            }
        });
    }

Answer 1

为什么不尝试将 player=MediaPlayer.create(this,Uri.parse("//url here")); 放在链接列表的循环中，就像这样:

  LinkedList<String> urls;



     // Just make this method void. 
     //Anyways your LinkedList is still accessible globally 
     //and you are instantiating your linkedlist inside this method;
    private void fGetPlayableUrl( String mPls) {
            GetStreamingUrl oGetStreamingUrl = new GetStreamingUrl(MainActivity.this);
            urls=new LinkedList<String>();
            urls = oGetStreamingUrl.getStreamingUrl(mPls);
        }

    private void initializeMediaPlayer() throws IOException {
            player = new MediaPlayer();


            //int i ;
           /* for (i=0;i<='\0';i++)
            {

            }*/
           //URL=urls.get(2).toString();

    fGetPlayableUrl(url String here);

         for(String url:urls){
             try {

         player=MediaPlayer.create(this,Uri.parse(url));

                player.setDataSource(URL);
                //player.prepareAsync();
                //player.start();

            } catch (IllegalArgumentException e) {
                e.printStackTrace();
            } catch (IllegalStateException e) {
                e.printStackTrace();
            }

            player.setOnBufferingUpdateListener(new OnBufferingUpdateListener() {

                public void onBufferingUpdate(MediaPlayer mp, int percent) {
                    playSeekBar.setSecondaryProgress(percent);
                    Log.i("Buffering", "" + percent);
                }
            });
        }


        }