title: How to install android build support for unity manually (unity hub)?
body: <p>I used Unity Hub downloaded latest Unity Editor, it works fine for editor,document and language packs, but can not download android build support. Just told me download failed many many times in the past two days.</p>
  
  <p>So I downloaded <code>UnitySetup-Android-Support-for-Editor-2018.2.16f1.pkg</code> from webpage.  This package install reported failed at the end of every try.This package size(348.9M) is not same as the one showed(365.8M) in UnityHub download list.</p>
  
  <p>There is a 2017 version Unity Editor installed by download  **.pkg, but the support installer never ask me about Editor's location.</p>
  
  <p>Is there some way to install android build support manually?<br>
  Thanks for any tips.</p>