To handle sensitive user data and ensure security in Android applications, follow these steps:
1. Use HTTPS for network communication to encrypt data transmission.
2. Store sensitive data securely using Android Keystore System or encrypted SharedPreferences like EncryptedSharedPreferences library.
3. Implement access control with user authentication, such as biometrics or password-based methods.
4. Limit app permissions and request only necessary ones, following the principle of least privilege.
5. Regularly update dependencies and libraries to address known vulnerabilities.
6. Obfuscate code using tools like ProGuard or R8 to hinder reverse engineering attempts.
7. Conduct regular security audits and penetration testing to identify potential weaknesses.
