Open-source alternatives to Java Aes Crypto

Rootbeer is an Android security SDK and root detection library designed to verify device integrity and identify operating system tampering. It functions as a device integrity checker that scans for management applications and system files indicating root access or unlocked bootloaders. The library employs a variety of detection techniques, including binary-presence scanning for superuser binaries, direct file system probing of restricted directories, and property-based environment validation of kernel flags and build properties. It utilizes a Java-native interface bridge to execute low-level

Android Shared preference wrapper than encrypts the values of Shared Preferences. It's not bullet proof security but rather a quick win for incrementally making your android app more secure.