Bug? Widget compilation problem with "xxx-xx.png" type names

I have problem with compilation error: if I include in widget layout ImageView with ImageFile name like "database-icon.png" (if name includes "-" sign) it generates "Invalid image file name: administrator-icon" error.
Replacing file name with something like "administrator_icon.png" makes everything ok.
If same layout (with "-" in name)is used in normal activity(not service) it is compiled OK.



Is this normal behavior?

This is not a bug. This is a limitation of the resources system used by widgets. So the compiler checks it and throws an error to help you avoid it.