xamarin.android App signing does not work

Question

So im trying to publish my new android app to the Google PlayStore. From reading this tutorial I understand that I have to sign my app before releasing it to the PlayStore. I di

Answer 1

When using the Google Play service component ICS from Xamarin the following error appears if you are using JDK 6.

2>JAVAC : warning : com\google\ads\mediation\MediationBannerListener.class(com\google\ads\mediation:MediationBannerListener.class): major version 51 is newer than 50, the highest major version supported by this compiler.
2>JAVAC : warning : com\google\ads\mediation\MediationBannerAdapter.class(com\google\ads\mediation:MediationBannerAdapter.class): major version 51 is newer than 50, the highest major version supported by this compiler.

Error building Xamarin.Android project with Google Play Services

This error is solved by changing from JDK 6 to JDK 7. Because of that now my app that is already deployed to the Google Play Store is throwing "Package file was not signed correctly" in some smartphones.

Is there a way to sign app correctly using JDK 7 and Xamarin?