Detect which app has been launched in android

Question

How to detect which app has been launched by user in my app i.e my application should get notified when Whatsapp is launched by user even if my app is not running in foreground

Answer 1

No, this is not really possible using the public SDK.

You can get the current running process by ActivityManager#getRunningAppProcesses But it is definitely impossible to get notified .However, it isn't the most accurate, or efficient method