Retrofit Kotlin Kotlin and retrofit network calls

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Comments

[David Martinez]

In this post it was missing adding the internet permission in the AndroidManifest.xml

"android.permission.INTERNET"

It helped me a lot, thanks!

[TuricaHoria]

I have a problem , I cannot get onto onResponse , I only get onFailure. This is my code:

object RetrofitClientInstance {

private val BASE_URL = "https://wger.de/api/v2/"

private val httpClient = OkHttpClient.Builder()

private val retrofit = Retrofit.Builder()
            .baseUrl(BASE_URL)
            .addCallAdapterFactory(RxJava2CallAdapterFactory.create())
            .addConverterFactory(GsonConverterFactory.create())
            .client(httpClient.build())
            .build()

fun<T> buildService (service : Class <T>) : T {
    return  retrofit.create(service)
}

}

interface APIServices {

@GET("exercise")
fun getAllExercises(): Call<MutableList<Exercise>>

}

class ExerciseFragment : Fragment() {

override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
    return inflater.inflate(R.layout.fragment_exercises, container, false)
}

override fun onViewCreated(view: View, savedInstanceState: Bundle?) {

    val request = RetrofitClientInstance.buildService(APIServices::class.java)

    val call = request.getAllExercises()
    call.enqueue(object : Callback<MutableList<Exercise>>
        {
            override fun onFailure(call: Call<MutableList<Exercise>>, t: Throwable) {
                Toast.makeText(context,"Couldn't fetch the exercises" , Toast.LENGTH_SHORT).show()
            }

            override fun onResponse(call: Call<MutableList<Exercise>>, response: Response<MutableList<Exercise>>) {

                if (response.isSuccessful)
                {
                    rv_exercices.apply {
                        setHasFixedSize(true)
                        layoutManager = LinearLayoutManager(context)
                        adapter = ExercisesAdapter(response.body()!!.toMutableList())
                    }
                }
            }
        }
    )
}

}

[Odhiambo Paul]

in your code response.body()!! Should return a MutableList
Just pass response.body()!! to your recyclerview adapter instead of response.body()!!.toMutableList()

[Pete St. Martin]

Is anyone else having an issue getting the images (the movie posters) to load?

I would post my code, but I'm not sure where this is even coming from. I'm combing over it and trying different things in different places.

[Pete St. Martin]

Figured it out!

In the RecyclerView adapter

Glide.with(itemView.context).load("http://image.tmdb.org/t/p/w500${movie.poster_path}").into(photo)

Should be:

Glide.with(itemView.context).load("https://image.tmdb.org/t/p/w500${movie.poster_path}").into(photo)

I don't know if things have changed, but the http should be an https or nothing will send.

[Thiha Aung]

Do you have any other tutorials about items clicking and displaying detail pages?

[Odhiambo Paul]

I have one that I will be publishing within the next few days.

[microsoftjulius]

I dont know why when i run the code it returns the error E/RecyclerView: No adapter attached; skipping layout

[Paulo Cesar]

This is because you forget to register your adapter in your RecycleView

Basically you can do something like that. example below:

val listOfItems = lisfOf("1", "2", "3")
recyclerView.layoutManager = LinearLayoutManager(this)
recyclerView.adapter = YourAdapter(listOfItems)

This is quick example that you following. I hope helped you. see u.

[Odhiambo Paul]

Please share your code through gist so that I can help you out