How to decode jwt token in android using Java

To decode a JWT token in Android, you can use a JWT library. One of the popular libraries for handling JWT tokens in Android is the jjwt library.

Here are the steps to decode a JWT token using the jjwt library:

• Add the jjwt library to your project by adding the following dependency to your app-level build.gradle file:

implementation 'io.jsonwebtoken:jjwt:0.9.1'

• Once the library is added, you can decode the JWT token by creating a JwtParser instance and calling its parse() method with the encoded JWT token as a parameter:

String jwtToken = "your-jwt-token";

JwtParser jwtParser = Jwts.parser();

Claims claims = jwtParser.parseClaimsJwt(jwtToken).getBody();

• The getBody() method returns a Claims object that contains the payload of the JWT token. You can then extract the claims from the Claims object as follows:

String userId = claims.get("userId", String.class);

String email = claims.get("email", String.class);

// and so on for other claims

That's it! You can now use the claims object to access the claims in the JWT token and use them as required in your Android app.