How to Store JWT Tokens in Shared Preferences in Android and Retrieve Them Across Your App

Описание: Learn how to securely store and retrieve `JWT tokens` using Shared Preferences in your Android application, ensuring smooth user sessions throughout your app.
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This video is based on the question https://stackoverflow.com/q/64998970/ asked by the user 'Haseeb Javaid' ( https://stackoverflow.com/u/12926587/ ) and on the answer https://stackoverflow.com/a/65001263/ provided by the user 'Ghulam Qadir' ( https://stackoverflow.com/u/8516118/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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How to Store JWT Tokens in Shared Preferences in Android and Retrieve Them Across Your App

In developing Android applications that require user authentication, you often have to handle JWT (JSON Web Tokens). JWT tokens facilitate safe communication between your mobile app and the backend, allowing users to stay logged in. In this post, we will explore how to effectively store JWT tokens in Shared Preferences and retrieve them across your application.

The Problem: Storing JWT Tokens

When using an API, such as a Laravel API, upon a successful login, your application will receive a JWT token. The challenge arises in how to store this token so it can be used throughout your application. You may be able to retrieve the token from your login response, but storing it and making it accessible in different activities is crucial for a seamless user experience.

The Solution: Using Shared Preferences

Shared Preferences in Android provide a simple way to store small amounts of data as key-value pairs. This allows us to keep the JWT token secure and easily accessible.

Step 1: Modify the SessionManager Class

To handle the JWT tokens, you'll need to add functions that help in saving and retrieving string data from Shared Preferences in your SessionManager class. Here’s how you can do it:

[[See Video to Reveal this Text or Code Snippet]]

Step 2: Save the JWT Token

Once you receive the token from the login response JSON object inside your checkLogin method, you can save it using the saveStringData method:

[[See Video to Reveal this Text or Code Snippet]]

Step 3: Retrieve the JWT Token

Whenever you need to access the token in your application, just initialize the SessionManager and use the getStringData method:

[[See Video to Reveal this Text or Code Snippet]]

Summary

By following these steps, you can store the JWT token securely in Shared Preferences, making it accessible throughout your app. This enhances user experience by preventing repeated logins and maintaining sessions easily. Storing sensitive data like tokens in Shared Preferences helps you manage user authentication in a more manageable and reliable manner.

Conclusion

Implementing JWT token storage and retrieval is essential for modern Android applications dealing with user authentication. By utilizing Shared Preferences effectively, you ensure that your application remains user-friendly while maintaining security.

For any further questions or need for clarification, feel free to reach out or leave a comment below!