Pfthb

I want to avoid adding to every network call token and locale parameters, but they are not constant and might change. To achieve that I want to use network interceptor.
Locale string is taken from LocaleManager which holding reference to PreferenceManager... And UserManager has field token which is updated quite often from back-end.
Network modue:

@Provides
@Singleton
@QueryInterceptor
public Interceptor queryInterceptor(@UserLocale final String userLocale) 
 return new Interceptor() 
 @Override
 public Response intercept(@NonNull Chain chain) throws IOException 
 Request request = chain.request();
 final HttpUrl url = request.url().newBuilder()
 .addQueryParameter(QUERY_PARAM_OS, ANDROID_OS)
 .addQueryParameter(QUERY_PARAM_VERSION, BuildConfig.VERSION_NAME)
 .addQueryParameter(QUERY_PARAM_LOCALE, userLocale)
 .build();
 request = request.newBuilder().url(url).build();
 return chain.proceed(request);
 
 ;

Locale:

 @Provides
@UserLocale
public String userLocale(LocaleManager localeManager) 
 return localeManager.getCurrentLanguageCode();

and something similar with user token.

Is it a good practice to do so?

Sorry, Dagger2 is still quite new for me.

Indded you should not store locale in graph since when configuration will change your locale will not be updated. You could have a "ConfigurationComponent" with its own scope but in your case i'll just remove locale from graph :

@Provides
@Singleton
@QueryInterceptor
public Interceptor queryInterceptor(final LocaleManager localeManager) 
 return new Interceptor() 
 @Override
 public Response intercept(@NonNull Chain chain) throws IOException 
 Request request = chain.request();
 final HttpUrl url = request.url().newBuilder()
 .addQueryParameter(QUERY_PARAM_OS, ANDROID_OS)
 .addQueryParameter(QUERY_PARAM_VERSION, BuildConfig.VERSION_NAME)
 .addQueryParameter(QUERY_PARAM_LOCALE, localeManager.getLocal())
 .build();
 request = request.newBuilder().url(url).build();
 return chain.proceed(request);
 
 ;