rest - How to parse various answers from server and Retrofit -

the server can answer like:

{ "data1":"value", "data2":"value" }  

or:

{ "error":"text" }  

or:

{ "json":"{ "error":"text" }" } 

how parse various answers server using retrofit.
maybe should make rich pojo like:

class myanswer {    string data1;    string data2;    string error;    // etc } 

i recommend use google's gson library serialize/deserialize json strings pojo's , deserialize back. retrofit2 supports gson converter.

add compile 'com.squareup.retrofit2:converter-gson' build.gradle , create retrofit instance below:

retrofit retrofit = new retrofit.builder()                     .baseurl(base_url)                     .client(client)                     .addconverterfactory(gsonconverterfactory.create())                     .build(); 

define java classes , annotate them gson's serializedname tag.

public class myanswer {     @serializedname("data1")     public string data1;      @serializedname("data2")     public string data2;      @serializedname("error")     public string error; } 

then can pojo on onresponse method:

@override public void onresponse(call<exampleclass> call, response<exampleclass> response) {     exampleclass exampleclass = response.body();     ...... } 

you can deserialize json:

gson gson = new gsonbuilder().create(); exampleclass ec = gson.fromjson(jsonstring, exampleclass.class); 

or serialize json:

exampleclass ec = new exampleclass(); ec.data1 = "some text"; ec.data2 = "another text";  gson gson = new gsonbuilder().create(); string jsonstring = gson.tojson(ec); 

you can create nested/complex structures gson. more information, visit their user guide.