uri轉file:

file = new File(new URI(uri.toString()));

 private String getPath(Uri uri) {
        String[] projection = {MediaStore.Video.Media.DATA};
        Cursor cursor = managedQuery(uri, projection, null, null, null);
        int column_index = cursor
                .getColumnIndexOrThrow(MediaStore.Audio.Media.DATA);
        cursor.moveToFirst();
        return cursor.getString(column_index);
    }
 

file轉uri:

URI uri = file.toURI();

String path = file.getPath()

Uri uri = Uri.parse(path);

File file = new File(path)