How do I use the Gson converter in RetroFit?

Question

I'm making a simple RetroFit application for educational purposes, and use IntelliJ IDEA as my IDE.

I have imported the Retrofit library properly (at least I think I have) but I'm not able to get the Gson Converter package. I have the gson.jar from google installed but nowhere in either of these libraries is there a class called "GsonConverterFactory", which is required for me to parse JSON.

Edit: I'm on Windows.

manoj · Answer 1 · 2015-12-14T16:45:08.640

Add compile 'com.squareup.retrofit:converter-gson:2.0.0-beta2' to your build.gradle file and get the dependency resolved or add corresponding jars to your bulid path.

then use GsonConverterFactory.create() to get the Converter Factory

I tried using 2.0.0-beta1 but it gave me an illegal type conversion error for factory as given below, so moved to 2.0.0-beta2

  error: method addConverterFactory in class Builder cannot be applied to   given types;
    required: Factory
    found: GsonConverterFactory
    reason: actual argument GsonConverterFactory cannot be converted to Factory by method invocation conversion

So my suggestion is to use 2.0.0-beta2

my build.gradle has following dependencies to resolve retrofit.

 compile 'com.squareup.retrofit:retrofit:2.0.0-beta2'  
 compile 'com.squareup.retrofit:converter-gson:2.0.0-beta2'

answer by iagreen will not work for retrofit beta2.. If retrofit2 is used we need to use converter-gson beta 2 as said by @manoj.. — DJphy, Dec 12 '15 at 06:58
got the error - failed to resolve - for these above dependecies — Narendra Singh, Nov 01 '16 at 20:47

iagreen · Answer 2 · 2016-01-19T03:40:15.183

20

If you are using retrofit 2, you need to include the convert-gson package. For gradle builds, you can add compile 'com.squareup.retrofit:converter-gson:2.0.0-beta3' to your dependencies section.

For other build systems, or to download the jar, checkout the Maven Central convert-gson page.

edited Jan 19 '16 at 03:40

answered Sep 06 '15 at 22:27

iagreen

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score 15 · Answer 3 · answered Jan 15 '17 at 23:25

15

in your Module:app build.gradle add

compile 'com.squareup.retrofit2:converter-gson:[retrofit2 version]'

the version above is same with your retrofit2 version, so for example your retrofit2 version is 2.1.0, than your build.gradle should be like this :

compile 'com.squareup.retrofit2:retrofit:2.1.0'
compile 'com.squareup.retrofit2:converter-gson:2.1.0'

answered Jan 15 '17 at 23:25

Faruk

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This worked for me - specifying that they have to be exactly the same – Liam Baron Jan 19 '21 at 09:42

score 14 · Answer 4 · edited Mar 02 '16 at 07:08

14

Try this

/* JSON */
compile 'com.google.code.gson:gson:2.5'
compile 'com.squareup.retrofit2:converter-gson:2.0.0-beta4'

// >Retrofit & OkHttp
compile ('com.squareup.retrofit2:retrofit:2.0.0-beta3') {
    // exclude Retrofit’s OkHttp peer-dependency module and define your own module import
    exclude module: 'okhttp'
}
compile 'com.squareup.okhttp3:okhttp:3.0.1'

edited Mar 02 '16 at 07:08

Jared Burrows

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answered Jan 27 '16 at 03:54

Thiago

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How do I use the Gson converter in RetroFit?

4 Answers4

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