android - 如何从 MediaStore.File 和 MediaStore.File.FileColumn 获取数据

Question

我正在尝试获取其中包含音频文件的所有文件名包含音频文件的标题。这是我尝试过的代码，但它不正确，因为我无法设置 External_Content_uri。这是我试过的代码。

  private void External() {
    try {
        String[] proj = {MediaStore.Files.FileColumns.TITLE,
                MediaStore.Files.FileColumns._ID,
                MediaStore.Files.FileColumns.PARENT,
                MediaStore.Files.FileColumns.DATA
        };// Can include more data for more details and check it.

        String selection =MediaStore.Files.FileColumns.MEDIA_TYPE+"=?";

        String[] selectionArgs = {"MediaStore.Files.FileColumns.MEDIA_TYPE_AUDIO"};

        String sortOrder = MediaStore.Audio.Media.TITLE + " ASC";

        Cursor audioCursor = getContentResolver().query(MediaStore.Files.getContentUri("\"external\""), proj, selection, selectionArgs, sortOrder);

        if (audioCursor != null) {
            if (audioCursor.moveToFirst()) {
                do {
                    int filetitle = audioCursor.getColumnIndexOrThrow(MediaStore.Files.FileColumns.TITLE);
                    int file_id = audioCursor.getColumnIndexOrThrow(MediaStore.Files.FileColumns._ID);
                    int fileparent = audioCursor.getColumnIndexOrThrow(MediaStore.Files.FileColumns.PARENT);
                    int filedata = audioCursor.getColumnIndexOrThrow(MediaStore.Files.FileColumns.DATA);
                    Mediafileinfo info = new Mediafileinfo();
                    info.setData(new File(new File(audioCursor.getString(filedata)).getParent()).getName());
                    info.setTitle(audioCursor.getString(filetitle));
                    info.set_id(audioCursor.getString(file_id));
                    info.setParent(audioCursor.getString(fileparent));
                   // info.setData(audioCursor.getString(filedata));
                    audioList.add(info);
                } while (audioCursor.moveToNext());
            }
        }
        assert audioCursor != null;
        audioCursor.close();
    } catch (Exception e) {
        e.printStackTrace();
    }
}

我试过了 this和 this示例，但我无法获得解决方案。

Answer 1

写一个新的答案，因为你只需要音频文件的文件夹名称。

所以这里最好使用 MediaStore.Audio.Media 而不是 MediaStore.File。使用下面的音频文件路径获取文件夹名称。

new File(new File(audioCursor.getString(filedata)).getParent()).getName()

---

private void External() {
try {
    Uri externalUri= MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;

    projection=new String[]{MediaStore.Audio.Media._ID,
            MediaStore.Audio.Media.TITLE,
            MediaStore.Audio.Media.DATA,;

    String selection =null;

    String[] selectionArgs = null;

    String sortOrder = MediaStore.Audio.Media.TITLE + " ASC";

    Cursor audioCursor = getContentResolver().query(externalUri, proj, selection, selectionArgs, sortOrder);

    if (audioCursor != null) {
        if (audioCursor.moveToFirst()) {
            do {
                int filetitle = audioCursor.getColumnIndexOrThrow(MediaStore.Audio.Media.TITLE);
                int file_id = audioCursor.getColumnIndexOrThrow(MediaStore.Audio.Media._ID);
                int filePath = audioCursor.getColumnIndexOrThrow(MediaStore.Audio.Media.DATA);
                Mediafileinfo info = new Mediafileinfo();
                info.setData(new File(new File(audioCursor.getString(filedata)).getParent()).getName());
                info.setTitle(audioCursor.getString(filetitle));
                info.set_id(audioCursor.getString(file_id));
                audioList.add(info);
            } while (audioCursor.moveToNext());
        }
    }
    assert audioCursor != null;
    audioCursor.close();
} catch (Exception e) {
    e.printStackTrace();
}
}