Yes sure, to ensure android application security wise what I did was one is to establish secure communication like you can ensure all the network communication use a valid HTTPS to encrypt data in transit like like you can use any certification winning as well as in the server SSL TSL certificate to prevent any man-in-the-middle type of attacks and secure your application then you can also make use of secure data storage like encrypted storage like use androids encrypted is shared preference and encrypted file APS to store sensitive data securely and you can avoid storing sensitive data like I minimize the storage of sensitive data on the device unnecessarily and I made up encryption technique and sometimes I made sure that the user authentication is secure by using the OAuth and OpenID connect like user secure authentication protocols like OAuth 2.0 and you can use OpenID connect for any user authentication these guys these sort of things and one more technique you can remember is I made use of secure APIs like token based authentication like JWT or the token for API request and ensure that tokens are securely stored and refreshed as needed that is one approach I made and made sure that I use product of the application as well like use ProGuard you can use make use of ProGuard application component to secure like intent provider you can use permission to restrict access to ensure validated the data received to avoid any intent proofing and is broadcast receivers also you can make sure use of local broadcast for internal you can minimize the permission request only if necessary permissions
