How to use getResources.getString(R.string) in an Interface?

Question

I have an interface that has a static key. And I wanted to retrieve this key from a string file, but if I just put R.string.key, it shows incompatible types, because it retrieves the integer value, and if I put R.string.key + "", it becomes a string but retrieves the String file id, it would be best to use getResources.getString (R.string.key), but there is no way to use the getResources.getString method in the Interface.

Working:

public interface NotificacaoService {
    @Headers({"34853485734",
            "Content-Type:application/json"}) @POST("send")
    Call<NotificacaoDados> salvarNotificacao(@Body NotificacaoDados notificacaoDados);
}

I want to leave it like this:

public interface NotificacaoService {
    @Headers({getResources.getString(R.string.key),
            "Content-Type:application/json"}) @POST("send")
    Call<NotificacaoDados> salvarNotificacao(@Body NotificacaoDados notificacaoDados);
}

CommonsWare · Accepted Answer · 2019-09-02 19:37:12Z

1

Sorry, what you want is not possible. Annotation parameters need to be constants.

One solution is to switch from string resources to BuildConfig. Use buildConfigField in your Gradle script to define your key (buildConfigField "String", "API_KEY", "\"34853485734\""). Then, you can reference that generated constant in your interface (e.g.,BuildConfig.API_KEY`).

Alternatively — if this interface is for Retrofit — you could add your headers via an OkHttp interceptor, instead of via a @Headers annotation.

answered Sep 2, 2019 at 19:37

CommonsWare

1.0m195 gold badges2.4k silver badges2.7k bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

jvoaojvictor Over a year ago

I was able to use the Gradle file as you said, thanks

Collectives™ on Stack Overflow

How to use getResources.getString(R.string) in an Interface?

1 Answer 1

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related