On #Google's official download page for the #AndroidSDK they list a column "SHA-256 checksum" but then provide a SHA1 value. WTF?
https://developer.android.com/studio#command-line-tools-only
I just found this info graphic, I think it is quite good. I'm curious what people think about how understandable this is for non-technical people http://www.gnu.org/graphics/amihud-4-freedoms.html