title: ApkSignerTool issue with Java version
body: <p>i built my first app in Xamarin (in Visual Studio 2019) and I want to deploy it to my android phone. 
  (I actually dont really want to make the app public - just my phone would do the trick for now. I just dont want to root it.)</p>
  
  <p>I followed these guides:</p>
  
  <ul>
  <li><a href="https://docs.microsoft.com/de-de/xamarin/android/deploy-test/release-prep/index?tabs=windows" rel="noreferrer">https://docs.microsoft.com/de-de/xamarin/android/deploy-test/release-prep/index?tabs=windows</a></li>
  <li><a href="https://docs.microsoft.com/de-de/xamarin/android/deploy-test/signing/index?tabs=windows" rel="noreferrer">https://docs.microsoft.com/de-de/xamarin/android/deploy-test/signing/index?tabs=windows</a></li>
  </ul>
  
  <p>But once the archiving process is finished, and I was asked for the password of the 'Signing Identity' I defined before, I get the following error:</p>
  
  <blockquote>
    <p>Signing packages failed. 
    java.lang.UnsupportedClassVersionError:
    com/android/apksigner/ApkSignerTool has been compiled by a more recent
    version of Java Runtime(class file version 53.0), this version of the
    Java Runtime only recognizes class file versions of up to 52.0</p>
  </blockquote>
  
  <p>I tried to install all sorts of Java versions (currently I am at 'Java 8 Update 241' and 'JDK 13.0.2') and made sure there is just one Java entry in my PATH variable pointing to the current version.</p>
  
  <p>But it just wont change anything and I am out of Ideas, I hope somebody here can help me.</p>
  
  <p>Thank you very much for your time in advance!
  Ben</p>