Can't force close app without it restarting?

I'm using this code to force close my app after 1 second. But the problem is that it restarts itself after closing! How can I make it close permanently?

  private fun endApp() {

    val handler = Handler()
    handler.postDelayed({ Process.sendSignal(Process.myPid(), Process.SIGNAL_KILL) }, 1000)
  }

Use this method to force exit your app:

fun exitApp() {
    moveTaskToBack(true);
    exitProcess(0)
}

> exitProcess(status: Int): Terminates the currently running
> process.
>
> moveTaskToBack (boolean nonRoot) Move the task containing this
> activity to the back of the activity stack. The activity's order
> within the task is unchanged.

or

> finishAffinity(): Finish this activity as well as all activities
> immediately below it in the current task that have the same affinity.
> This is typically used when an application can be launched on to
> another task (such as from an ACTION_VIEW of a content type it
> understands) and the user has used the up navigation to switch out of
> the current task and in to its own task. In this case, if the user has
> navigated down into any other activities of the second application,
> all of those should be removed from the original task as part of the
> task switch.

fun exitApp() {
    finishAffinity()
}