flutter call a function after moving back to screen from another screen

Question

How to call a function in flutter ,after moving back to a screen from another screen?

For Example:

Screen 1

function1(){
}

Screen2

function2(){
//Go back to screen 1 and then call function1()
}

Answer 1

It's simple.

Navigator.push(context, MaterialPageRoute(builder: (context)=> SecondScreen())).then((_){
      // This method gets callback after your SecondScreen is popped from the stack or finished.
      function1();
    });

You should also refer the Flutter Navigation & Routing.