Android Notification Which Shows As Text In The Lower Half

this question is really dump I'd say but what are the notifications called that only show a quick text information in the lower half of the screen with a gray background? They, for

Solution 1:

Assuming you mean Clock, what you are looking at is a Toast message.

CharSequence text = "Hello toast!";
int duration = Toast.LENGTH_SHORT;

Toast toast = Toast.makeText(context, text, duration);
toast.show();