CODEWITHSUNDEEP
kotlinretrofit2rx-java2
Martin K
Martin K

Reputation: 61

How to parse json array with Retrofit and RxJava

I have problem parsing array of objects using Retrofit + RxJava

JSON contains only this array

{
    "files": [
        {
            "id": 10,
            "notificationId": 15,
            "name": "cats.ncs",
            "dateTime": "2019-01-07T17:34:45"
        }
    ]
}

retrotfit service

@GET("/api/FileApi/files")
fun files(): Observable<FilesResponse>

where FilesResponse is

data class FilesResponse(
    @SerializedName("files")
    var files: List<FileElement>
)

and FileElement

data class FileElement(
    @SerializedName("id")
    var id: Long,
    @SerializedName("notificationId")
    var notificationId: Long,
    @SerializedName("name")
    var name: String,
    @SerializedName("dateTime")
    var dateTime: String
)

when I run it I get always

the return type of CallObjectMethodA does not match io.reactivex.Observable ApiService.files()

So how do I parse JSON containing only an array?

Upvotes: 1

Views: 1290

Answers (2)

Joshua de Guzman
Joshua de Guzman

Reputation: 2143

Few notes

First of, you might need to show us how you call ApiService.files()

What could possibly went wrong

How it is called

What could be the possible solution

Invoke the method like this

ApiService
        .files()
        .subscribeOn(Schedulers.io())
        .observeOn(AndroidSchedulers.mainThread())
        .subscribe({
            // Handle the values here
        },{
            // Handle the error here
        },{
            // Handle the completion here (optional)
        })

Not like this

ApiServices.files()

nor 

var fileResponse = ApiServices.files()

Ensure the you have setup your retrofit builder well, as mentioned above

  • RxJava2CallAdapterFactory
  • GsonConverterFactory

Other than that, without the code on how you call it, we won't be able to help you in an in-depth manner.

Upvotes: 0

Muhammad Youssef
Muhammad Youssef

Reputation: 373

Try using RxJava2 Adapter

Integration

implementation 'com.squareup.retrofit2:adapter-rxjava2:{retrofit_version}'

Retrofit client setup

new Retrofit.Builder()
  .baseUrl(BASE_URL)
  .addConverterFactory(GsonConverterFactory.create())
  .addCallAdapterFactory(RxJava2CallAdapterFactory.create()) //option 1
  .addCallAdapterFactory(RxJava2CallAdapterFactory.createWithScheduler(Schedulers.newThread())) //option 2
  .build();

Upvotes: 1

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