@RequiresApi(O) @Override public Cursor query(final Uri uri, final String[] projection, final Bundle queryArgs, final CancellationSignal cancellationSignal) {
		return forward(() -> mResolver.query(toTargetUri(uri), projection, queryArgs, cancellationSignal));
	}
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