A bitmap graphic file (.png, .jpg, or .gif). Creates a BitmapDrawable.
Nine-Patch File

A PNG file with stretchable regions to allow image resizing based on content (.9.png).
Creates a NinePatchDrawable.

Layer List

A Drawable that manages an array of other Drawables. These are drawn in array order, so
the element with the largest index is be drawn on top. Creates a LayerDrawable.

State List

An XML file that references different bitmap graphics for different states (for example, to use
a different image when a button is pressed). Creates a StateListDrawable.

Level List

An XML file that defines a drawable that manages a number of alternate Drawables, each
assigned a maximum numerical value. Creates a LevelListDrawable.

Transition Drawable

An XML file that defines a drawable that can cross-fade between two drawable resources.
Creates a TransitionDrawable.

Inset Drawable

An XML file that defines a drawable that insets another drawable by a specified distance.
This is useful when a View needs a background drawble that is smaller than the View's
actual bounds.

Clip Drawable

An XML file that defines a drawable that clips another Drawable based on this Drawable's
current level value. Creates a ClipDrawable.

Scale Drawable

An XML file that defines a drawable that changes the size of another Drawable based on its
current level value. Creates a ScaleDrawable

Shape Drawable

An XML file that defines a geometric shape, including colors and gradients. Creates a
ShapeDrawable.

9b. A style resource defines the format and look for a UL A style can be applied to an
ividual View from within a layout file) or to an entire Activity or application (from
( hin the manifest file).