What are the best practices for Android App Security?

It will ensure that Android applications are secure by using Authentication techniques, Encryption for masking sensitive data, and keeping Library updates current according to the patches provided by different Patch providers. For Code obfuscation, the use of ProGuard will make it difficult for an attacker to reverse-engineer the particular application. The Developer should care about the fact that all Inputs should be validated and HTTPS should be implemented in order to protect the Data in transit. Perform a Security audit and Penetration test to find out any flaws and rectify them before actual Deployment.