Trigger MediaScanner without an entire class

Question

Possible Duplicate:
Trigger mediascanner on specific path (folder), how to?

Is their a way to trigger the mediascanner without adding an entire class.

I tried something like this

MediaScannerConnection mScanner;

File sdcard = Environment.getExternalStorageDirectory();
String sdcard2 = sdcard.toString();

mScanner.connect();
mScanner.scanFile(sdcard2+"/DCIM/Camera/", "*/*");

But this isn't working, how to make this work? I want to scan a path or an image.