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How to handle response callbacks using Fast Networking Library in Kotlin Android

How to handle response callbacks using Fast Networking Library in Kotlin Android.

In this tutorial, we will learn how to handle response callbacks using the Fast Networking Library in Kotlin Android. The Fast Networking Library is a powerful and easy-to-use networking library for Android that allows developers to make HTTP requests and handle their responses efficiently.

Step 1: Add the Fast Networking Library to your project

To get started, you need to add the Fast Networking Library to your project. Open your project's build.gradle file and add the following dependency:

implementation 'com.amitshekhar.android:android-networking:1.0.2'

Sync your project to download the library files.

Step 2: Make a GET request

To make a GET request using the Fast Networking Library, you need to create an instance of AndroidNetworking and call the get() method. Here's an example:

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

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

In the above code, we are making a GET request to the URL https://api.example.com/data. We are using the getAsJSONObject() method to get the response as a JSON object. Inside the onResponse() method, you can handle the response data, and inside the onError() method, you can handle any errors that occur during the request.

Step 3: Make a POST request

To make a POST request using the Fast Networking Library, you need to call the post() method instead of the get() method. Here's an example:

AndroidNetworking.post("https://api.example.com/data")
.addBodyParameter("param1", "value1")
.addBodyParameter("param2", "value2")
.build()
.getAsJSONObject(object : JSONObjectRequestListener {
override fun onResponse(response: JSONObject) {
// Handle the response
}

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

In the above code, we are making a POST request to the URL https://api.example.com/data. We are using the addBodyParameter() method to add the request parameters. Inside the onResponse() method, you can handle the response data, and inside the onError() method, you can handle any errors that occur during the request.

Step 4: Handle the response

Inside the onResponse() method, you can access the response data and handle it according to your requirements. Here's an example:

override fun onResponse(response: JSONObject) {
val data = response.getString("data")
val message = response.getString("message")
// Handle the response data
}

In the above code, we are accessing the "data" and "message" fields from the response JSON object. You can parse the response data and use it in your application as needed.

Step 5: Handle errors

Inside the onError() method, you can handle any errors that occur during the request. Here's an example:

override fun onError(error: ANError) {
val errorCode = error.errorCode
val errorMessage = error.errorMessage
// Handle the error
}

In the above code, we are accessing the error code and error message from the ANError object. You can handle the error based on its type and display an appropriate message to the user.

Conclusion

In this tutorial, we have learned how to handle response callbacks using the Fast Networking Library in Kotlin Android. We have seen examples of making GET and POST requests, handling response data, and handling errors. The Fast Networking Library provides a simple and efficient way to handle network requests in your Android applications.