Zxing.net generate qr code xamarin.android null reference

[youssefyaza]

I have a problem generating qr code. I used a sample from site:
https://www.c-sharpcorner.com/article/generate-barcode-and-qr-code-in-xamarin-android/

I have used the exact same code as in the example but I got a null reference error at this line:
bitmapMatrix = new MultiFormatWriter().encode(message, BarcodeFormat.QR_CODE, size, size);

The problem only occurs BarcodeFormat.QR_CODE the others work well.

In my project I have installed the next packages (the newest versions):

• Zxing.net
• Xamarin.AndroidX.AppCompat
• Xamarin.Essentials
• Xamarin.Google.Android.Material

The null reference exception comes from the writer.encode message (please see my debug info):

Does anyone experienced this problem?

[micjahn]

https://stackoverflow.com/questions/70741623/zxing-net-generate-qr-code-xamarin-android-null-reference/70761473#70761473
It's a bug inside the static initialization routines which occurs if some encodings (character sets) are missing. The next version (>0.16.7) will fix it.