Retrofit 2.0 is an updated version of Retrofit, a type-safe REST client for Android and Java. Some key differences in Retrofit 2.0 include calls returning Call objects instead of Responses, OkHttp now being required, and improved URL handling. Retrofit 2.0 also features enhanced converter support to serialize and deserialize JSON and XML to and from POJO objects using libraries like Gson, Jackson, and Moshi.

1. Retrofit 2.0
KRISTIJAN JURKOVIC

2. WHAT IS RETROFIT?

3. USAGE
compile 'com.squareup.retrofit2:retrofit:2.0.0-beta4'

4. WHAT’S DIFFERENT?
com.squareup.retrofit > com.squareup.retrofit2
Converters
Rest interface methods return Call<T>
OkHttp is required
Security exception if no Internet permission
RestAdapter > Retrofit

5. CALL<T>
call.enqueue(new Callback<T> { … })
call.execute();
call.cancel();

6. ONRESPONSE
response.isSuccess();
response.code();
response.body();
response.errorBody().string();

7. URL HANDLING
same as web <a href=“…” /> handling
@GET(“blog”)
Base url: http://www.infinum.co/api/v1
Result: http://www.infinum.co/api/blog
Base url: http://www.infinum.co/api/v1/
Result: http://www.infinum.co/api/v1/blog

8. URL HANDLING
@GET(“/blog”)
Base url: http://www.infinum.co/api/v1
Result: http://www.infinum.co/blog
@GET(“http://www.infinum.co/api/v1/blog”)
@GET
void get(@Url String url);

9. LOG

10. CONVERTERS
.addConverterFactory({pass in converter here});
Gson: com.squareup.retrofit:converter-gson
Jackson: com.squareup.retrofit:converter-jackson
Moshi: com.squareup.retrofit:converter-moshi
Protobuf: com.squareup.retrofit:converter-protobuf
Wire: com.squareup.retrofit:converter-wire
Simple XML: com.squareup.retrofit:converter-simplexml
Converter.Factory interface

11. CONVERTERS
.addConverterFactory({pass in converter here});
Gson gson = new GsonBuilder()
... add type converters here
.create();
Retrofit retrofit = new Retrofit.Builder()
.baseUrl(“http://www.infinum.co/api/”)
.addConverterFactory(GsonConverterFactory.create(gson))
.build();

12. Any questions?
KRISTIJAN.JURKOVIC@INFINUM.CO
@KJURKOVIC
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