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

Question

我试图让所有文件名都包含音频文件我已经使用Mediastore来获取媒体商店音频,专辑,播放列表和音频数据,但我如何获得包含音频文件的文件或文件夹标题.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();
    }
}

我试过这个和这个例子,但我无法得到解决方案.

Answer 1

编写一个新的答案，因为您想要的只是音频文件的文件夹名称。

所以这里最好使用的是MediaStore.Audio.Media而不是使用MediaStore.File. 使用以下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();
}
}