If the app is multi-process, and you want to kill all processes when you exit the main interface, you can try the following methods:
private void killAllProcess() {
ActivityManager mActivityManager = (ActivityManager) this.getSystemService(Context.ACTIVITY_SERVICE);
List<ActivityManager.RunningAppProcessInfo> mList = mActivityManager.getRunningAppProcesses();
for (ActivityManager.RunningAppProcessInfo runningAppProcessInfo : mList) {
if (runningAppProcessInfo.pid != android.os.Process.myPid()) {
android.os.Process.killProcess(runningAppProcessInfo.pid);
}
}
android.os.Process.killProcess(android.os.Process.myPid());
}