How to cancel a request using OKHTTP in Kotlin Android

How to cancel a request using OKHTTP in Kotlin Android.

Here is a detailed step-by-step tutorial on how to cancel a request using OKHTTP in Kotlin for Android:

Step 1: Add dependencies

First, you need to add the OKHTTP library to your project. Open your app-level build.gradle file and add the following dependency:

implementation 'com.squareup.okhttp3:okhttp:4.9.1'

Sync your project to download the library.

Step 2: Create an OkHttpClient instance

In your Kotlin file, create an instance of the OkHttpClient class. This will be used to make HTTP requests and cancel them when needed. Here's an example:

val client = OkHttpClient()

Step 3: Create a request

Next, create a request using the Request.Builder class. Set the URL, method (GET, POST, etc.), headers, and any other necessary parameters. Here's an example:

val request = Request.Builder()
    .url("https://api.example.com/data")
    .get()
    .build()

Step 4: Execute the request

To execute the request and receive a response, use the client's newCall() method and pass in the request. This will return a Call object, which represents the ongoing request. Here's an example:

val call = client.newCall(request)
call.enqueue(object : Callback {
    override fun onFailure(call: Call, e: IOException) {
        // Handle failure
    }

    override fun onResponse(call: Call, response: Response) {
        // Handle response
    }
})

Step 5: Cancel the request

To cancel the ongoing request, call the cancel() method on the Call object. This will abort the request and invoke the onFailure() method of the Callback. Here's an example:

call.cancel()

Step 6: Handle cancellation

In the onFailure() method of the Callback, you can check if the request was canceled using the isCanceled() method of the Call object. Here's an example:

override fun onFailure(call: Call, e: IOException) {
    if (call.isCanceled()) {
        // Request was canceled
    } else {
        // Handle other failures
    }
}

That's it! You have now learned how to cancel a request using OKHTTP in Kotlin for Android. Remember to handle cancellation appropriately in your application to provide a better user experience.