无法从文件路径列出父目录

Unable to list parent directory from file path

在我的代码中,我试图收集列表中的所有视频文件并将其扭曲到父目录中并在 recycler view 中显示,并且在显示时我得到一个文件夹名称 0 我不知道不明白 0 文件夹的来源。

并且 0 文件夹列出了我存储中的所有文件,并且这些文件在各自的文件夹中完全扭曲。

and here is a screen shot of the folder zero.

代码

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    foldersList = new ArrayList<>();
    folderpath = new ArrayList<>();

    recyclerView = findViewById(R.id.recyclerView);
    recyclerView.setHasFixedSize(true);
    recyclerView.setLayoutManager(new LinearLayoutManager(this));
    parseAllVideo();
    getUniqueFolders();
    adapter = new FolderAdapter(this, foldersList);
    recyclerView.setAdapter(adapter);
    adapter.notifyDataSetChanged();

}

private void parseAllVideo() {
    try {
        String[] proj = {
                MediaStore.Video.Media._ID,
                MediaStore.Video.Media.DATA};

        Cursor videocursor = this.getContentResolver().query(MediaStore.Video.Media.EXTERNAL_CONTENT_URI, proj, null, null, null);
        if (videocursor != null) {
            if (videocursor.moveToFirst()) {
                int path_index = videocursor.getColumnIndexOrThrow(MediaStore.Video.Media.DATA);
                do {
                    String filepath = videocursor.getString(path_index);
                    String folder_path = MyUtils.getParentDirPath(filepath);
                    File file = new File(filepath);
                    if (file.exists()) {

                    }
                    folderpath.add(folder_path);
                } while (videocursor.moveToNext());
            }
            videocursor.close();
        }

    } catch (Exception e) {
        e.printStackTrace();
    }
}

private void getUniqueFolders() {
    List<String> newList = new ArrayList<>(new HashSet<>(folderpath));
    Collections.sort(newList);
    for (int i = 0; i < newList.size(); i++) {
        String folder_name = newList.get(i).substring(newList.get(i).lastIndexOf("/") + 1);
        FolderModel folder = new FolderModel(folder_name, newList.get(i));
        Log.d(TAG, "base file = " + folder);
        foldersList.add(folder);
    }

}![enter image description here](https://i.stack.imgur.com/rgQrz.jpg)

这是我要归档的内容,内部文件夹中的文件显示为缩略图(滑行,位...)但使用我的代码 0 文件夹包含我存储中的所有文件,

这就是我想要的。

根据@blackapps 评论Environment.getExternalStorageDirectory().getAbsolutePath() value on most Android devices is /storage/emulated/0

当我检查我的设备存储时,一切正常,文件存储在内部存储位置