controller flutter code example

Example 1: TextFormFiel text update

TextFormField(
  key: Key(_total.toString()), // <- Magic!
  initialValue: _total.toString(),
  keyboardType: TextInputType.number,
  decoration: InputDecoration(
    labelText: 'Total',
  ),
),

Example 2: flutter textfield controller

dependencies:
  flutter_spinkit: "^4.1.2"