I have Xamarin Studio, and I need to specify the Android SDK Location. I have previously had Xamarin Studio working on my pc, and for some reason, I need to enter this again
On 28 April 2019 official procedure is the following:
Download and install Android Studio from - link
Start Android Studio. On first launch, the Android Studio will download latest Android SDK into officially accepted folder
When Android studio finish downloading components you can copy/paste path from the "Downloading Components" view logs so you don't need to type your [Username]. For Windows: "C:\Users\ [Username] \AppData\Local\Android\Sdk"