GET and POST requests in Android Kotlin - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create a GET request using OkHttp.

Android Kotlin

val client = OkHttpClient()
val request = Request.Builder()
    .url("https://api.example.com/data")
    .[1]()
    .build()

Drag options to blanks, or click blank then click option'

Apost

Bput

Cget

Ddelete

Attempts:

3 left

💡 Hint

Common Mistakes

Using post() instead of get() for fetching data.

Forgetting to call build() after setting the method.

The get() method sets the HTTP method to GET, which is used to retrieve data.

2fill in blank

medium

Complete the code to create a POST request with a JSON body.

Android Kotlin

val JSON = "application/json; charset=utf-8".toMediaType()
val jsonBody = "{\"name\": \"John\"}"
val body = jsonBody.toRequestBody([1])
val request = Request.Builder()
    .url("https://api.example.com/users")
    .post(body)
    .build()

Drag options to blanks, or click blank then click option'

AJSON

Bnull

CMediaType.parse(JSON)

DjsonBody

Attempts:

3 left

💡 Hint

Common Mistakes

Passing null instead of the media type.

Passing the raw JSON string instead of the media type.

The toRequestBody() method requires the media type to specify the content type of the body. Here, JSON is the media type for JSON data.

3fill in blank

hard

Fix the error in the code to execute the request asynchronously.

Android Kotlin

client.newCall(request).[1](object : Callback {
    override fun onFailure(call: Call, e: IOException) {
        println("Request failed")
    }
    override fun onResponse(call: Call, response: Response) {
        println(response.body?.string())
    }
})

Drag options to blanks, or click blank then click option'

Aenqueue

Bsend

Ccall

Dexecute

Attempts:

3 left

💡 Hint

Common Mistakes

Using execute() which blocks the main thread.

Using a non-existent method like send().

The enqueue() method runs the request asynchronously, calling back on success or failure.

4fill in blank

hard

Fill both blanks to create a GET request and print the response body safely.

Android Kotlin

val request = Request.Builder()
    .url("https://api.example.com/info")
    .[1]()
    .build()

client.newCall(request).enqueue(object : Callback {
    override fun onResponse(call: Call, response: Response) {
        val body = response.body?.[2]()
        println(body ?: "No response body")
    }
    override fun onFailure(call: Call, e: IOException) {}
})

Drag options to blanks, or click blank then click option'

Aget

Bpost

Cstring

Dbytes

Attempts:

3 left

💡 Hint

Common Mistakes

Using post() instead of get() for a GET request.

Using bytes() which returns raw bytes instead of a string.

Use get() to set the GET method and string() to read the response body as text safely.

5fill in blank

hard

Fill all three blanks to create a POST request with JSON body and handle the response.

Android Kotlin

val JSON = "application/json; charset=utf-8".toMediaType()
val jsonData = "{\"age\": 30}"
val body = jsonData.toRequestBody([1])
val request = Request.Builder()
    .url("https://api.example.com/update")
    .[2](body)
    .build()

client.newCall(request).enqueue(object : Callback {
    override fun onResponse(call: Call, response: Response) {
        val result = response.body?.[3]()
        println(result ?: "Empty response")
    }
    override fun onFailure(call: Call, e: IOException) {}
})

Drag options to blanks, or click blank then click option'

AJSON

Bpost

Cstring

Dget

Attempts:

3 left

💡 Hint

Common Mistakes

Using get() instead of post() for sending data.

Passing null or wrong media type to toRequestBody().

Use JSON as media type for the body, post() to set the POST method, and string() to read the response body as text.