Htpp client using Koin DI, Retrofit and OkHttp

API url

//more plugins here....
apply plugin: 'kotlin-kapt'

android {
    //your stuff...
    
    buildTypes {
        release {
            //your stuff...
            buildConfigField "String", "BASE_URL", "\"https://your.api.url//\""
        }

        debug {
            buildConfigField "String", "BASE_URL", "\"https://your.api.url//\""
        }
    }
}

libraries

//Http client
implementation "com.squareup.retrofit2:retrofit:2.3.0"
implementation "com.squareup.retrofit2:adapter-rxjava2:2.3.0"
implementation "com.squareup.retrofit2:converter-gson:2.3.0"
implementation "com.squareup.okhttp3:logging-interceptor:3.12.1"

//Koin DI
api "org.koin:koin-android:2.0.1"
implementation "org.koin:koin-androidx-viewmodel:2.0.1"

//Rx
api "io.reactivex.rxjava2:rxjava:2.2.7"
api "io.reactivex.rxjava2:rxkotlin:2.2.0"
api "io.reactivex.rxjava2:rxandroid:2.1.1"

manifest

Add to manifest

<uses-permission android:name="android.permission.INTERNET"/>

Remote data source module

import okhttp3.OkHttpClient
import okhttp3.logging.HttpLoggingInterceptor
import org.koin.dsl.module
import retrofit2.Retrofit
import retrofit2.adapter.rxjava2.RxJava2CallAdapterFactory
import retrofit2.converter.gson.GsonConverterFactory
import java.util.concurrent.TimeUnit

/*
 * This file is part of Revoltevaluation.
 * 
 * Created by maiconhellmann on 09/08/2019
 * 
 * (c) 2019 
 */

val remoteDataSourceModule = module {
    //OkHttp
    factory { providesOkHttpClient() }

    //Retrofit
    single {
        createWebService<YouApiClassNameHere>(
            okHttpClient = get(), url = BuildConfig.BASE_URL)
    }
    
    //If necessary, provide a data soure
    factory {
        RateRemoteDataSource(
            api = get())
    }
}

fun providesOkHttpClient(): OkHttpClient {
    val interceptor = HttpLoggingInterceptor().apply {
        level = HttpLoggingInterceptor.Level.BODY
    }
    return OkHttpClient.Builder().connectTimeout(30, TimeUnit.SECONDS).addInterceptor(interceptor)
        .readTimeout(30, TimeUnit.SECONDS).writeTimeout(30, TimeUnit.SECONDS).build()
}

inline fun <reified T> createWebService(
    okHttpClient: OkHttpClient, url: String
): T {
    return Retrofit.Builder().addConverterFactory(GsonConverterFactory.create())
        .addCallAdapterFactory(RxJava2CallAdapterFactory.create()).baseUrl(url).client(okHttpClient)
        .build().create(T::class.java)
}