kotlin_android_retrofit_github_api_sync_request_quickstart.kt

1import retrofit2.Retrofit
2import retrofit2.converter.gson.GsonConverterFactory
3import retrofit2.http.GET
4import retrofit2.http.Path
5import retrofit2.Call
6import java.io.IOException
7
8// 1. Define the data model
9data class Contributor(val login: String, val contributions: Int)
10
11// 2. Define the API interface
12interface GitHub {
13    @GET("/repos/{owner}/{repo}/contributors")
14    fun contributors(
15        @Path("owner") owner: String,
16        @Path("repo") repo: String
17    ): Call<List<Contributor>>
18}
19
20fun main() {
21    // 3. Create a Retrofit instance
22    val retrofit = Retrofit.Builder()
23        .baseUrl("https://api.github.com/")
24        .addConverterFactory(GsonConverterFactory.create())
25        .build()
26
27    // 4. Create an implementation of the API interface
28    val github = retrofit.create(GitHub::class.java)
29
30    // 5. Create a call object
31    val call = github.contributors("square", "retrofit")
32
33    // 6. Execute the call (Synchronous example for simplicity)
34    try {
35        val response = call.execute()
36        val contributors = response.body()
37        contributors?.forEach { 
38            println("${it.login} (${it.contributions})")
39        }
40    } catch (e: IOException) {
41        e.printStackTrace()
42    }
43}