@Override public int update(@NonNull final Uri uri, @Nullable final ContentValues values, @Nullable final String selection, @Nullable final String[] selectionArgs) {
		return forward(() -> mResolver.update(toTargetUri(uri), values, selection, selectionArgs));
	}
This single-user provider serves as a proxy provider, since it can be accessed from any user.

Created by Oasis on 2017/8/29.
fileprovider/src/main/java/com/oasisfeng/island/fileprovider/ShuttleProvider.java