Simple Retrofit Container

MyApiContainer.java

/*
 * With help of this class, we reduce the retrofit api call to a single line.
 * Example: MyApiContainer.api().getMethod().enqueue(...);
 */
public class MyApiContainer {

    interface MyApi {
        @GET("someEndpoint")
        Call<String> getMethod();
        
        @POST("someEndpoint")
        Call<Void> postMethod();
    }

    // Singleton instance of my custom api interface
    static MyApi myApi;

    // Return api instance. If not created yet, create it.
    public static MyApi api(){
        if (myApi == null)
            myApi = new Retrofit.Builder()
                    .baseUrl("https://example.com)
                    .addConverterFactory(ScalarsConverterFactory.create()) // Order of converter factories is important
                    .addConverterFactory(GsonConverterFactory.create())
                    .build()
                    .create(TestResultsApi.class);
        return myApi;
    }
}

// Library references
// implementation 'com.squareup.retrofit2:retrofit:2.9.0'
// implementation 'com.squareup.retrofit2:converter-gson:2.9.0'
// implementation 'com.squareup.retrofit2:converter-scalars:2.0.0'