doing a demo to retrieve value from a input dialog. found the implementation including at least two key class:TextEditingController & TextField . you cannot get value from TextField directly (that famillar in Android) but can only access the value/event from TextEditingController.
Flutter has divided the view and controller strictly. that is nice!
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const TextField(
// the controller better define at class scope
// but not in this anonymouse closure,
// becuase you need to do get the value from that.
controller:_controller,
hintText:'I am hint',
text:'I am default text'
);
important : you must dispose controller manually after using it
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@override
void dispose() {
textEditingController.dispose();
super.dispose();
}