taskmanager - How to kill background process in android -

I have read almost every thread about this subject, but there is no solution at all.

I tried with various things to kill the process by sending signal to the indicator android like OS, such as android.os.process.killProcess (process.pid) Process ID to kill the process OSPCS & Signal (Process PID, Android Pro. Process. SIGNAL_KILL), , activity code. By hitting the package name, activityManager The Resume Package ("package_name)" .

I can not find this solution to work. I know that this is possible because we can not stop the application by going into settings.