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.
Android is open source, meaning that manufacturers don't have to pay Google to use it, and that they're free to modify it. This means that it's used in a wide range of hardware varying in price from small budget phones to large-screen high-end handsets.t the time of writing, mobile phones run a variant of version 2 of Android, while most new tablets run a variant of version 3. The difference between the 2.x and 3.x versions of Android is mainly in how they use the screen space provided.