How to HTTP request by POST method with Kotlin [duplicate]

Answer 1

you have also used retrofit 2.0 add dependency in gradle file like below ...

  compile 'com.squareup.retrofit2:retrofit:2.3.0'

show every api call and data into log cat add below depencey ..

    compile 'com.squareup.okhttp3:logging-interceptor:3.4.1'

and after make one class for api set up like below ..

class ApiClient {

companion object {
    val BASE_URL = "https://simplifiedcoding.net/demos/"
    var retrofit: Retrofit? = null
    fun getClient(): Retrofit? {
        if (retrofit == null) {
            val interceptor = HttpLoggingInterceptor()
            interceptor.level = HttpLoggingInterceptor.Level.BODY
            val client = OkHttpClient.Builder().apply {
            readTimeout(20, TimeUnit.SECONDS)
            writeTimeout(20, TimeUnit.SECONDS)
            connectTimeout(20, TimeUnit.SECONDS)
            addInterceptor(interceptor)
            addInterceptor { chain ->
                var request = chain.request()
                request = request.newBuilder()
                        .build()
                val response = chain.proceed(request)
                response
            }
            }
            retrofit = Retrofit.Builder()
                    .baseUrl(BASE_URL)
                    .client(client.build())

                    .addConverterFactory(GsonConverterFactory.create())
                    .build()

        }

        return retrofit
    }
}

}

then after make interface to call different type of api like below ...

interface ApiInterface {
@GET(NetworkConstant.DATA) // hear pass your api call
fun getData(): Call>

}

make sparate class for network for api value like bellow ..

class NetworkConstant {
companion object{
    const val DATA = "marvel"
}

}

then after when you call to api and getting response that time used below code ..

 private fun getHeroData() {
    val dialog= ProgressDialog(mContext)
    showProgress(dialog)
    var apiInterface: ApiInterface = ApiClient.getClient()!!.create(ApiInterface::class.java)
    var hero: Call>
    hero = apiInterface.getData()
    hero.enqueue(object : Callback> {
        override fun onFailure(call: Call>?, t: Throwable?) {
            closeDialog(dialog)
            Toast.makeText(mContext, t?.message, Toast.LENGTH_SHORT).show()
            Log.d("Error:::",t?.message)
        }

        override fun onResponse(call: Call>?, response: Response>?) {
           mHeroDataList.clear()
            if (response != null && response.isSuccessful && response.body() != null) {
                closeDialog(dialog)
                mHeroDataList .addAll(response.body()!!)
                setAdapter(mHeroDataList)
            }
        }

    })
}