(Retrofit) Could not locate converter for class crashing app

Question

So Retrofit 2.0.0 was recently released and theres not really any updated examples on how to use it, but im trying to implement it for a basic API call. Im getting a

java.lang.IllegalArgumentException: Unable to create converter for class`  

caused by

Caused by: java.lang.IllegalArgumentException: Could not locate converter for class orbyt.app.dataclass. Tried: * retrofit.OkHttpBodyConverterFactory 

When trying to make the api call.

Answer 1

In Retrofit 2.0, Converter is not included in the package and when you are using Retrofit 2.0 Make Sure follow new URL pattern

Base URL: always ends with /

@Url: DO NOT start with /

Retrofit retrofit = new Retrofit.Builder()         .baseUrl(Constants.API_BASE_URL)         .addConverterFactory(GsonConverterFactory.create())         .build(); 

For more information about 2.0 Follow this link Retrofit 2.0: The biggest update

And also update build.gradle.

implementation "com.squareup.retrofit2:converter-gson:$retrofit_version" 

And add the extension in project level build.gradle file

ext { retrofit_version= "2.x.x" } 

Answer 2

I was facing the same issue. I fixed it by adding :

compile 'com.squareup.retrofit2:converter-gson:<latest-version>' 

to my build.gradle

Then specify the converter when creating my Retrofit instance.

Retrofit retrofit = new Retrofit.Builder()             .baseUrl(Constants.API_BASE_URL)             .addConverterFactory(GsonConverterFactory.create())             .build();