With the new version (v8 in Android) of Google maps, just click on the search and scroll down to end.

There is an option "Save map to use offline". Alas, it has an expiry period of 30 days.

Just discovered google maps on my ipad only lets you save an offline map if youre logged in. Nice job Google, you've managed to make signing in to google a requirement even for offline functionality.

Use this

http://marc.info/?l=linux-usb&m=137714769606183&q=raw