Getting thumbnail from Storage Access Framework Uri

 if (/* mediaFile.getPath() is of form content://, e.g: From Storage Access Framework on 4.4+ */) {
    //mediaFile.getPath() = "content://com.android.providers.media.documents/document/video:183"
    long videoId = Long.parseLong(Uri.parse(mediaFile.getPath()).getLastPathSegment().split(":")[1]);
    ivThumbnail.setImageBitmap(MediaStore.Video.Thumbnails.getThumbnail(mContext.getContentResolver(), videoId, MediaStore.Images.Thumbnails.MINI_KIND, null));
}