How's the thing in the image called? I do not know English so I don't know very specific nouns for things. My question is how's the highlighted message box called. I want to implement similar message in my application, but I can't without even knowing its name. In case this is not the correct website for a question like this, I'm sorry, but I have no idea where to ask this.
It's a Toast.


  A toast provides simple feedback about an operation in a small popup. It only fills the amount of space required for the message and the current activity remains visible and interactive. Toasts automatically disappear after a timeout.