如何在 Kotlin 中发出 API 请求

发布于07月21日

I am extremely new to Kotlin and APIs in general and can't find the syntax to create an API request using this language. I am creating a mobile version of a website so I'm using Android Studio to create a new UI for an already established backend. What are the steps and syntax to creating a request? Any help is deeply appreciated.

推荐答案

一旦有set your Android Studio to use Kotlin，睡觉调用就非常简单，这与使用JAVA时的逻辑基本相同.

以下是睡觉呼叫OkHttp%的示例:

build.gradle

dependencies {
    //...
    implementation 'com.squareup.okhttp3:okhttp:3.8.1'
}

AndroidManifest.xml

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

MainActivity.kt

class MainActivity : AppCompatActivity() {

    private val client = OkHttpClient()

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        run("https://api.github.com/users/Evin1-/repos")
    }

    fun run(url: String) {
        val request = Request.Builder()
                .url(url)
                .build()

        client.newCall(request).enqueue(object : Callback {
            override fun onFailure(call: Call, e: IOException) {}
            override fun onResponse(call: Call, response: Response) = println(response.body()?.string())
        })
    }
}

以下是其他库的一些更复杂的示例: