Update android music library - Force a Refresh of Android Music Library

If you are looking to update your Android Music Library or Force a Refresh of it, here is how.

It’s quite a simple (dead-simple I might say) solution. Just clear the media storage cache, which is found in Settings >> Applications >> Manage Applications >> Media Storage >> Clear Data. Since you have wiped the cache, you’ll need to power down your phone, then boot it back up.

Or

use SDmount widget, after putting new stuff on or changing names click the widget and sd card is unmounted then re mounted