Skip to main content

How to cancel a network request using Fast Networking Library in Kotlin Android

How to cancel a network request using Fast Networking Library in Kotlin Android.

Here's a step-by-step tutorial on how to cancel a network request using the Fast Networking library in Kotlin for Android:

Step 1: Add Fast Networking Library to your project​

To use the Fast Networking library, you first need to add it to your project. Open your app-level build.gradle file and add the following dependency:

dependencies {
    implementation 'com.amitshekhar.android:android-networking:1.0.2'
}

After adding the dependency, sync your project.

Step 2: Make a network request​

To demonstrate the cancellation of a network request, let's first make a simple GET request. In your activity or fragment, create a function to make the network request:

import com.androidnetworking.AndroidNetworking
import com.androidnetworking.common.Priority
import com.androidnetworking.interfaces.JSONObjectRequestListener

fun makeNetworkRequest() {
    AndroidNetworking.get("https://api.example.com/data")
        .setPriority(Priority.MEDIUM)
        .build()
        .getAsJSONObject(object : JSONObjectRequestListener {
            override fun onResponse(response: JSONObject) {
                // Handle success response
            }

            override fun onError(error: ANError) {
                // Handle error response
            }
        })
}

Replace the URL "https://api.example.com/data" with the actual URL you want to make the request to. You can also customize the request method, headers, parameters, etc., as per your requirements.

Step 3: Cancel the network request​

To cancel a network request, you need to keep a reference to the request object returned by the Fast Networking library. Declare a variable to hold the request object:

private var networkRequest: AndroidNetworkingRequest? = null

Next, modify the makeNetworkRequest() function to assign the request object to the variable:

fun makeNetworkRequest() {
    networkRequest = AndroidNetworking.get("https://api.example.com/data")
        .setPriority(Priority.MEDIUM)
        .build()
        .getAsJSONObject(object : JSONObjectRequestListener {
            override fun onResponse(response: JSONObject) {
                // Handle success response
            }

            override fun onError(error: ANError) {
                // Handle error response
            }
        })
}

Now, to cancel the request, call the cancel() method on the networkRequest object:

fun cancelNetworkRequest() {
    networkRequest?.cancel()
}

Step 4: Trigger the network request and cancellation​

You can trigger the network request and cancellation from your activity or fragment. For example, you can have a button to start the request and another button to cancel it:

class MainActivity : AppCompatActivity() {

    private var networkRequest: AndroidNetworkingRequest? = null

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

        val startButton = findViewById<Button>(R.id.startButton)
        val cancelButton = findViewById<Button>(R.id.cancelButton)

        startButton.setOnClickListener {
            makeNetworkRequest()
        }

        cancelButton.setOnClickListener {
            cancelNetworkRequest()
        }
    }
}

Make sure to replace R.id.startButton and R.id.cancelButton with the actual IDs of your buttons in the XML layout file.

Now, when you click the start button, the network request will be initiated, and when you click the cancel button, the request will be canceled.

That's it! You have successfully learned how to cancel a network request using the Fast Networking library in Kotlin for Android.