Can We Use Android App to Call REST API?

Android, Android Apps

Can We Use Android App to Call REST API?

In today’s digital era, mobile applications have become an integral part of our lives. With the rise of smartphones, developers are constantly exploring new ways to enhance user experiences. One such way is by integrating mobile apps with REST APIs (Representational State Transfer Application Programming Interface).

What is a REST API?

A REST API is a set of rules and protocols that allows different software applications to communicate and interact with each other over the internet. It follows the principles of the REST architectural style, which uses standard HTTP methods like GET, POST, PUT, and DELETE to perform various operations.

Why Use REST API in Android Apps?

Integrating a REST API into an Android app can offer numerous benefits:

  • Access to Data: By calling a REST API, you can fetch data from a remote server and display it in your app. This enables you to provide users with up-to-date information without storing all the data locally.
  • Scalability: REST APIs allow your app to scale effortlessly by separating the client-side application from the server-side infrastructure.

    This means you can make changes or updates on the server side without affecting your app’s functionality.

  • Synchronization: Using a REST API, you can synchronize data between your app and a server. This ensures that any changes made in one place reflect across all devices using your app.

Implementing REST API Calls in Android Apps

To implement REST API calls in an Android app, follow these steps:

1. Add Internet Permission

To make network requests, you need to add the internet permission to your app’s manifest file. Open the AndroidManifest.xml file and add the following line within the <manifest> tag:

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

2. Use HTTP Client Library

In Android, you can use libraries like Retrofit or Volley to simplify the process of making REST API calls. These libraries provide convenient methods and classes for handling network requests.

3. Create API Interface

Create an interface that defines the structure of your REST API calls. This interface will specify the endpoints and methods for making different types of requests (GET, POST, etc.). An example interface method for making a GET request could look like this:

public interface MyApiService {
    Call<List<User>> getUsers();

4. Make API Requests

In your app code, create an instance of your API service and make the desired API call using a network-aware component like an Activity or Fragment. Here’s an example using Retrofit:

// Create Retrofit instance
Retrofit retrofit = new Retrofit.Builder()

// Create API service
MyApiService apiService = retrofit.create(MyApiService.class);

// Make GET request
Call<List<User>> call = apiService.getUsers();
call.enqueue(new Callback<List<User>>() {
    public void onResponse(Call<List<User>> call, Response<List<User>> response) {
        if (response.isSuccessful()) {
            List<User> users = response.body();
            // Handle the response
        } else {
            // Handle error

    public void onFailure(Call<List<User>> call, Throwable t) {
        // Handle failure

These are the basic steps to call a REST API from an Android app. Remember to handle errors, implement proper authentication, and consider using background threads or asynchronous tasks to prevent blocking the UI thread.


Integrating a REST API into an Android app opens up endless possibilities for enhancing functionality and improving user experiences. By following the steps outlined above and using appropriate libraries, you can easily make network requests and interact with remote servers. So, go ahead and explore the world of REST APIs in your Android apps!