How to install Xamarin.Android for Visual Studio Enterprise 2015 offline - xamarin

Question

I want to install Xamarin for Android Development in Visual Studio 2015 Enterprise.
While installing, Xamarin told me that I was missing a lot of features, so it would download and install them for me. The download size was around 2GB, and I have a really slow internet.
I wanted to know if there is a way to download Xamarin and all required components separately, using some download manager like IDM, and then be able to use it later to re-install/install on another PC.
Also, I was able to find offline setups for JRE and JDK, and also Android Studio and Android SDK/NDK, but still, the download size is around 1.5GB, which I presume is for the required Android SDK libraries, APIs and tools.
So, I am just asking for a guide on downloading all the components and store them for installing later.

Answer 1

According to the official docs (whose pictures are outdated, by the way) you should login to your account and then head to the download page where you could find links to different versions of Xamarin.
I did so, but all that's available there are older versions of Xamarin Studio and the universal installer. Similar searches on the Xamarin Forums yielded no results as well.
There's a way to find the direct URL for each installer by checking the XML used by the Platform Installer (located at \AppData\Local\Temp\Xamarin\downloads\InstallationManifest.xml). I haven't tested whether installing them separately will work or not, but it probably will. Just make sure to install them in the right order (and to install the Android SDK/NDK after installing Xamarin.Android)
Here are the links to the latest versions, as of today:
Xamarin.Android
Android SDK
Android NDK (x64)
GTK#
Xamarin Studio
Xamarin for Visual Studio
It'd be good if someone with a Mac could help me find the URL for Xamarin.iOS, but that's a start :P

Answer 2

You can download this XML file and find the link of latest version of all required components.I did this and the latest links are :
Java JDK 1.7
Android SDK 24.4.1
NDK 10 (32) or NDK 10 (64)
Xamarin for Visual Studio 2015 4.1.2.18
Intel HAXM 6.0.1
Microsoft MSBuild Tools 2015.0
You don't even need to login for download them.

Answer 3

After 1st web install, backup %tmp%\Xamarin\downloads\ , then on a new Windows:
Uninstall Java 1.8 if exists.
Manually install Java JDK 1.7u71 + GTK# + Android SDK (Install for anyone).
Extract NDK to "C:\Program Files (x86)\Android\android-ndk-r10e", or make NTFS junction to it (not to run out of C: space later).
Run XamarinInstaller having just *.zip files in %tmp%\Xamarin\downloads\, when you see that current download is "XamarinStudio", disconnect Internet (you can delete the NDK now).
When you see above the progress bar: "Downloading Xamarin Studio", you can close the web installer.
Manually install Xamarin.VisualStudio, and if you want, XamarinStudio.
Step 4 require Internet, but noting to download.
To make NTFS junction, from "C:\Program Files (x86)\Android" prompt:
mklink /j android-ndk-r10e T:\android-ndk-r10e
where T: can be USB drive, but not Network drive.

Answer 4

I know it's a link only answer (copyright!), but there are step-by-step instructions including screenshots of how to do that:
Installing Xamarin Made Easy with Offline Installation
I've not tried it, but it should help you.

Answer 5

Found this:
http://ionemind.com/content/get-direct-download-links-xamarin
Links to XML files with direct links to necessary components for Xamarin, including Xamarin for Visual Studio (version 4.5, for VS 2013 and 2015).
Another link I found:
https://dl.xamarin.com/XamarinforVisualStudio/Windows/Xamarin.VisualStudio_4.8.0.1289738.msi
I had installed Xamarin Studio 5 and then it autoupdated its components (to Xamarin Studio 6.3 and the mentioned VisualStudio Tools 4.8).
Then in the "AppData/Roaming/Xamarin X.X" I found a folder for temp downloads. There was the MSI file.
Then I just searched for this exact MSI name to get a direct link.
(on this site https://itblogdsi.blog.fc2.com/blog-entry-23.html)
There's actually some info about releases and MSI names and it has Xamarin.VisualStudio_4.9.0.1538920.msi so replace this part in the MSI link above.
It's for VS 2015 only.