[Flutter] Flutter TextFormField: TextInputType.number is not working properly when I use...

When I use controller for Textformfield and want to define the keyboardtype as TextinputType.number, I can't input any thing unless I input any non-numeric character such as "." or "-".

final TextEditingController _questionIndexController = TextEditingController();

return Container(
height: _avaliableHeight * 0.05,
width: _sideBarWidth * 0.25,
child: TextFormField(
// keyboardType: TextInputType.number,
controller: _questionIndexController,
keyboardType: TextInputType.number,
style: TextStyle(fontSize: 10,),
decoration: InputDecoration(
contentPadding: EdgeInsets.symmetric(vertical: 0, horizontal: 5.0),
border: OutlineInputBorder(borderRadius: BorderRadius.circular(10.0)),
),

textInputAction: TextInputAction.done,
),

Continue reading...