I have and existing android app developed with Xamarin .
It works perfect.
I decided to create a widget for my app, and I followed Xamarin Widget Sample , http://forums.xamarin.com/discussion/22941... and Vogela Widget tutorial guidelines to add what it's needed.
Unfortunately since them the app crashes on start with this exception
Java.Lang.NullPointerException: Attempt to invoke virtual method 'void android.support.v7.widget.ContentFrameLayout.setId(int)' on a null object reference
The problem comes because when loading the first activity and doing base.OnCreate (savedInstanceState);
Bundle savedInstanceState
is null.
I finally found the error by myself. It seems the xml folder gives some errors on xamarin android. I just moved the contento to layout and reference it as layout/
instead of /xml
Another solution as mentioned here
delete
bin
andobj
folders on Android project and rebuild it
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