What do I do with Guice when I need to call a parent constructor that is also injectable? e.g. I have an abstract parent class that has a constructor that is injected with a
You'd need to do the exact same thing you do if you weren't using Guice... declare any parameters the parent constructor requires as parameters to each child's constructor as well, and pass those to super.
So if your abstract parent class's constructor takes a Foo, a child class's constructor needs to look like:
@Inject public ChildClass(Foo foo, Bar bar) {
super(foo);
this.bar = bar;
...
}