Although a device’s core
interfaces, icons and even
input mechanisms may be
are expected* to include the
default Holo system theme
on every device.
*This requirement only extends to “oﬃcial”
manufacturers who ship devices with Android
Marketplace. Small manufacturers don’t always
qualify, so although they have nothing to gain,
(and everything to lose) by not including Holo,
it’s possible they may choose to omit it.
Holo lightHolo dark