Dagger: Inject @Named strings?

Question

EDIT 2018-02-08: Sample project demonstrating how to do this at https://github.com/ravn/dagger2-named-string-inject-example - Note: the whole source is in

Answer 1

You have to define a provider in the dagger module for your @Named instance.

@Provides @Named("foo") String provideFoo()
{
    return "foo string";
}

Then you can inject the named instance in your constructor or using field injection in your dependent class.

public class Thermosiphon
{
    @Inject @Named("foo") String fooString;

    @Inject public Thermosiphon(Heater heater)
    {
        System.out.println("value of fooString is " + fooString);
    }
}