Question

我如何从特定文件夹中获取所有Mp3文件的列表？

我的文件夹是

 FILE_PATH = Environment.getExternalStorageDirectory().getPath() + "/my folder/"

以下代码显示所有文件夹中的所有mp3 ..我只想从我的文件夹中播放mp3

 Cursor createCursor(String filter) {
    ArrayList<String> args = new ArrayList<String>();
    String selection;

    if (mShowAll) {
        selection = "(_DATA LIKE ?)";
        args.add("%");
    } else {
        selection = "(";
        for (String extension : CheapSoundFile.getSupportedExtensions()) {
            args.add("%." + extension);
            if (selection.length() > 1) {
                selection += " OR ";
            }
            selection += "(_DATA LIKE ?)";
            selection  = selection  + "AND (IS_MUSIC=1)";
        }
        selection += ")";

        selection = "(" + selection + ") AND (_DATA NOT LIKE ?)";
        args.add("%espeak-data/scratch%");
    }

    if (filter != null && filter.length() > 0) {
        filter = "%" + filter + "%";
        selection =
            "(" + selection + " AND " +
            "((TITLE LIKE ?) OR (ARTIST LIKE ?) OR (ALBUM LIKE ?)))";
        args.add(filter);
        args.add(filter);
        args.add(filter);
    }

Answer 1

使用以下代码从所需文件夹中获取mp3文件列表： -

private ArrayList<String> listmp3 = new ArrayList<String>();
    String[] extensions = { "mp3" };

    private void loadmp3(String YourFolderPath) {

        File file = new File(YourFolderPath);
        if (file.isDirectory()) {
            File[] files = file.listFiles();
            if (files != null && files.length > 0) {
                for (File f : files) {
                    if (f.isDirectory()) {
                        loadmp3(f.getAbsolutePath());
                    } else {
                        for (int i = 0; i < extensions.length; i++) {
                            if (f.getAbsolutePath().endsWith(extensions[i])) {
                                listmp3.add(f.getAbsolutePath());
                            }
                        }
                    }
                }
            }
        }

    }

Answer 2

这个工作正常

 Cursor createCursor(String filter) {
    ArrayList<String> args = new ArrayList<String>();
    String path = Environment.getExternalStorageDirectory().getPath();

    String selection = MediaStore.Audio.Media.IS_MUSIC + " !=" + 0
            + " AND " + MediaStore.Audio.Media.DATA + " LIKE '" + path
            + "/Fast Mp3 Downloader/%'";



    if (filter != null && filter.length() > 0) {
        filter = "%" + filter + "%";
        selection =
            "(" + selection + " AND " +
            "((TITLE LIKE ?) OR (ARTIST LIKE ?) OR (ALBUM LIKE ?)))";
        args.add(filter);
        args.add(filter);
        args.add(filter);
    }

    String[] argsArray = args.toArray(new String[args.size()]);

    getExternalAudioCursor(selection, argsArray);
    getInternalAudioCursor(selection, argsArray);

    Cursor c = new MergeCursor(new Cursor[] {
            getExternalAudioCursor(selection, argsArray),
            getInternalAudioCursor(selection, argsArray)});
    startManagingCursor(c);
    return c;
}

来自特定文件夹的Mp3文件列表 - Android

2 个答案: