ApacheURLLister在Android拆分字符串

Question

我使用ApacheURLLister来查看mp3文件列表。我只需要显示文件名，但ApacheURLLister显示完整路径，如"http://server.com/a/song.mp3"。我只需要显示"song.mp3"。

protected void onCreate(Bundle savedInstanceState) {
    this.requestWindowFeature(Window.FEATURE_NO_TITLE);
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    mListView = (ListView) findViewById(R.id.listAudio);
    new getAudiofromServer().execute();
    new downloadAudioFromServer().execute();
    mListView.setOnItemClickListener(new OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
              String url = null;
              Object o = myList.get(position);
              url = o.toString().replace(" ", "%20").trim();      
              play = (PlaySongAsy) new PlaySongAsy(url).execute();
       }
     });
 }
 private void playSong(String songPath) {
     try {
        mp.reset();
        mp.setDataSource(songPath);
        mp.prepare();
        mp.start();
    } catch (IOException e) {
        Log.v(getString(R.string.app_name), e.getMessage());
    }        
}
private class downloadAudioFromServer extends
        AsyncTask<String, Integer, String> {
    @Override
    protected String doInBackground(String... url) {
        int count;
        try {
            URL url1 = new URL("http://server/Mora/");
            URLConnection conexion = url1.openConnection();
            conexion.connect();
            int lenghtOfFile = conexion.getContentLength();
            InputStream input = new BufferedInputStream(url1.openStream());
            OutputStream output = new FileOutputStream(
                    Environment.getExternalStorageDirectory() + "/Sounds/");
            byte data[] = new byte[1024];
            long total = 0;
            while ((count = input.read(data)) != -1) {
                total += count;
                // publishing the progress....
                publishProgress((int) (total * 100 / lenghtOfFile));
                output.write(data, 0, count);
            }
            output.flush();
            output.close();
            input.close();
        } catch (Exception e) {
        }
        return null;
    }
}
class getAudiofromServer extends AsyncTask<String, String, String> {
    @Override
    protected void onPreExecute() {
        super.onPreExecute();
        pDialog = new ProgressDialog(MainActivity.this);
        pDialog.setMessage("Getting File list from server, Please wait...");
        pDialog.setIndeterminate(false);
        pDialog.setCancelable(false);
        pDialog.show();
    }
    @SuppressWarnings("unchecked")
    @Override
    protected String doInBackground(String... arg0) {
        try {
            urlAudio = new URL("http://server/Mora/");
        } catch (MalformedURLException e) {
            e.printStackTrace();
        }
        ApacheURLLister lister1 = new ApacheURLLister();
        try {
            myList = lister1.listAll(urlAudio);
        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }
    protected void onPostExecute(String file_url) {
        if (pDialog.isShowing()) {
            pDialog.dismiss();
        }
        ArrayAdapter<String> adapter = new ArrayAdapter<String>(
                MainActivity.this, android.R.layout.simple_list_item_1,
                myList);
        adapter.notifyDataSetChanged();
        mListView.setAdapter(adapter);
        mListView.setChoiceMode(ListView.CHOICE_MODE_SINGLE);
        mListView.setCacheColorHint(Color.TRANSPARENT);
    }
}
class PlaySongAsy extends AsyncTask<String, Void, Boolean> {
    String baseURL;
    public PlaySongAsy(String baseURL) {
        this.baseURL = baseURL;
    }
    @Override
    protected void onPreExecute() {
        // TODO Auto-generated method stub
        super.onPreExecute();
    }
    @Override
    protected Boolean doInBackground(String... urls) {
        new Thread() {
            @Override
            public void run() {
                playSong(baseURL);
            }
        }.start();
        return true;
    }
    @Override
    protected void onPostExecute(Boolean result) {
        super.onPostExecute(result);
        // progressDialog.dismiss();
    }
}
public void onCompletion(MediaPlayer mp) {
}

Answer 1

问题是你正在使用标准的ArrayAdapter和布局，它将把每个URL转换成字符串并显示在列表中，因此你在列表中有完整的URL。

相反，创建了自己的适配器并使用URL.getFile()，它只返回像URL.getFile()这样的文件名，您可以将整个url保存在setTag()的布局视图中，因此在单击方法上，您仍然可以检索整个url并执行其余的处理。

试试这个教程，它用简单的方式解释了ArrayAdapter的用法:

https://github.com/codepath/android_guides/wiki/Using-an-ArrayAdapter-with-ListView