Flutter Toast Widget 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.
To add Toast Package just write this in your pubspec.yaml file:
fluttertoast: ^4.0.0
To show Toast here is the basic Syntax :
Fluttertoast.showToast(msg: "Sending message...");
You can see the output of this line is :

It has some more properties to customise Toast like textColor, fontSize etc
Fluttertoast.showToast( msg: "Sending message...", toastLength: Toast.LENGTH_SHORT, gravity: ToastGravity.CENTER, timeInSecForIosWeb: 1, backgroundColor: Colors.red, textColor: Colors.white, fontSize: 16.0 );
Here is the property Description :
- msg: to show message
- toastLength: Toast.LENGTH_SHORT or Toast.LENGTH_LONG
- gravity: set Gravity like Center, Top, Bottom
- backgroundColor: change Background Color of Toast
- textColor: change Text Color of Toast
- fontSize: fontSize of Flutter Toast Text
You can visit the official website of this Package : Flutter Toast