How to reduce Space between textfield and the input text in flutter - flutter

Question

I am developing this textfield and for some reason the text is having some space below it. Please let me know the solution to this.
This is my code for textfield.
Expanded(
child: Container(
height: 40,
child: TextField(
keyboardType: TextInputType.number,
controller: textEditingController,
style: TextStyle(
fontSize: 14, height: 0, color: Colors.white),
inputFormatters: <TextInputFormatter>[
FilteringTextInputFormatter.digitsOnly
],
decoration: InputDecoration(
// isDense: true,
// errorText: validateQtyTxt.toString(),
border: OutlineInputBorder(
borderRadius: BorderRadius.circular(10)),
labelText: 'QTY > '
// hintText: 'Enter a search term',
),
onChanged: (String newValue) {
(text) => setState(() => _text);
print(newValue);
int qty;
derivativeScanController.buttonClick(newValue, qty);
},
),
),
),
This is the image for reference
enter image description here

Answer 1

There is a property called contentPadding which takes EdgeInsetsGeometry type value with that you can reduce the spacing between textfield and actual text
sample code .
contentPadding: EdgeInsets.zero,
if you want to remove all the spacing change the isDense property to true also
isDense: true,
all the space will be removed

Answer 2

You can use the contentPadding in the decoration property of the TextField to edit its padding.
https://api.flutter.dev/flutter/material/InputDecoration-class.html
TextField(
decoration: InputDecoration(
contentPadding: EdgeInsets.only(...),
),
)
Which you can fill with whatever values you want. You can use things like EdgeInsets.zero or EdgeInsets.symmetric too:
https://api.flutter.dev/flutter/painting/EdgeInsets-class.html

Answer 3

Change the textStyle from 0 to 1 and adjust the text using padding.