Take a look at this chart. It combines the known shipment data with the total market size for smartphones as defined by Canalys.
Knowing the platform/vendor make-up we can estimate the percent of the market that was Android.
Note that the major unknown is still how much the platform hedgers (Samsung, Other) split their volumes between Android and Windows Mobile (yes, it’s still being sold).
Given this information, I would estimate Android share was around 30% globally. Canalys estimates 25%, which makes this analysis look reasonable.
On a platform basis, Android gains were mostly at the expense of RIM, Symbian and Windows Mobile as we know that the iPhone share remained steady.
Note that in years past the licensing vendors predominantly opted for Windows Mobile, a market that Microsoft wants to regain.