The drum set is the instrument central to the rhythm section. It acts as the motor that drives the group. A drum set can contain a multitude of percussion instruments, but in jazz, it usually consists of only a few parts. The lowest drum, or bass drum, is played with a pedal. The hi-hat, also played with a pedal, is a duo of small cymbals that crash together.
A style resource defines the format and look for a UI. A style can be applied to an individual View (from within a layout file) or to an entire Activity or application (from within the manifest file). For more information about creating and applying styles, please read Styles and Themes.
Also, for the future, you may want to download a text (SMS) backup app from the Android Market. I did a quick search of the market and found these backup apps: SMS Backup +, SMS Backup & Restore, TxtArchive SMS Backup, and backup SMS MMS Photo to Gmail. There are probably more text backup apps than these.