Fail to kill process on android

Question

I am developing a tiny app, it might contains several activities, and in MainActivity, there's a button aims to kill the whole process, here's what I do in the OnCLick:

android.os.Process.killProcess(android.os.Process.myPid());
MainActivity.this.finish();

I tested it on my phone. It did exit the activity and backed to my home page, but I long pressed the home page to check the current running process on my phone and found that it's still regarded as a running process. If I open it again, it would be just like a restarted one. Does anyone know how to solve this problem, or is it just a bug that an Android phone might have?

Answer 1

int pid = android.os.Process.myPid();
        android.os.Process.killProcess(pid);
        System.exit(0);