Android Game Keeps Getting Hacked [closed]

Answer 1

Taken from my solution from this post Avoid apk cracked

Implement your own licensing library

I'd also refer you to check out this from Google I/O 2011 YouTube recording:

Evading Pirates and Stopping Vampires

EDIT:

The Presentation Notes from Evading Pirates and Stopping Vampires

Some basic keypoints

• Modify the LVL
• Implement LVL Tamper Resistance
• Use obfuscation
• Add reflection