How to save value of TextField when a value is inputted in Flutter

Question

I have this code in a stateful class The variables

String sth1 ;
String sth2 ;

I need these variables to each get a value from two TextFields once something is inputted. This is what I have

         TextField(
              autofocus: true,
              focusNode: f1,
              inputFormatters: [
                LengthLimitingTextInputFormatter(1),
              ],
              keyboardType: TextInputType.number,
              onChanged: (newVal) {
                if (newVal.length == 1) {
                    newVal = sth1;


                  f1.unfocus();
                  FocusScope.of(context).requestFocus(f2);
                }

Answer 1

Your onChanged should have sth1 = newVal not newVal = sth1.

Answer 2

Take a

TextEditingController tec = new TextEditingController();

And pass it to the TextField as controller

TextField(controller: tec);

And when you want to get the text just use

tec.text;

Thats it!