如何仅对 Flutter 中的 TextField 中的文本应用填充？

Question

Without padding I get this result:

With something like this

Padding(padding: EdgeInsets.all(20.0), child: TextField())

I get the following result:

It might be a bit hard to see, but you only have to look at the red badge across the edge to realise what I mean.

I would like to only move the text with my padding, but in reality the whole TextField has the padding applied, ie that the underline moves with the padding, but I would like to have the underline still go across the whole view, that only the text inside the TextField is affected by the padding.

Answer 1

To apply the padding to the content of the TextField . You can apply the

contentPadding property of ItemDecoration at decoration property of TextField.

Like this:

TextField(
  textAlign: TextAlign.left,
  decoration: InputDecoration(
    hintText: 'Enter Something',
    contentPadding: EdgeInsets.all(20.0),
  ),
)

Answer 2

Works for me:

TextFormField(
  decoration: InputDecoration(
    border: InputBorder.none,
    contentPadding: EdgeInsets.symmetric(vertical: 10), //Change this value to custom as you like
    isDense: true, // and add this line
    hintText: 'User Name',
    hintStyle: TextStyle(
        color: Color(0xFFF00),
  )),
  keyboardType: TextInputType.text,
  style: TextStyle(
      color: Color(0xFFF00),
      fontSize: 14),
  maxLines: 1,
)

Answer 3

If you want to apply uneven, vertical padding to each side of the text inside the TextField, you'll have to first set textAlignVertical to TextAlignVertical.top.

If you don't do this, the largest top/bottom padding will apply to both the top and bottom of the text. I'm guessing this is because the TextField text is always centered horizontally.

TextField(
        controller: model.captionController,
        maxLines: null,
        minLines: 8,
        maxLength: 200,
        textAlignVertical: TextAlignVertical.top,
        decoration: PostFilledField('Add a caption...').copyWith(
          contentPadding: EdgeInsets.fromLTRB( 8, 0,  8, 90.0),
          isDense: true
        ),
        style: PostSmallText(),
      ),

Answer 4

If you are creating TextField as children widget in Column/Row widget it may not work if you set padding/content padding to textfield in root Widget.

Make sure always setting content padding based on your requirement at TextField level using InputDecoration

here is simple snippet for setting up padding for TextField content

TextField(
  decoration: InputDecoration(
    hintText: 'Title', 
    contentPadding: EdgeInsets.all(8)),
    keyboardType: TextInputType.phone,
 )

Result: