Flutter - 更改 TextFormField onPressed 的背景颜色（焦点）

Question

I have my InputDecoration as follows:

InputDecoration(
  floatingLabelBehavior: FloatingLabelBehavior.always,
  labelText: 'Password',
  labelStyle: TextStyle(
    color: AppColors.labelInputFocus,
    fontWeight: FontWeight.w400,
    fontSize: 18.sp,
  ),
  focusedBorder: UnderlineInputBorder(
    borderSide: BorderSide(color: AppColors.secondaryBlue, width: 2.0),
  ),
)

Like how bordercolor changes if pressed I want to change background color of textformfield if user selects it.

Answer 1

I have my InputDecoration as follows:

InputDecoration(
  floatingLabelBehavior: FloatingLabelBehavior.always,
  labelText: 'Password',
  labelStyle: TextStyle(
    color: AppColors.labelInputFocus,
    fontWeight: FontWeight.w400,
    fontSize: 18.sp,
  ),
  focusedBorder: UnderlineInputBorder(
    borderSide: BorderSide(color: AppColors.secondaryBlue, width: 2.0),
  ),
)

Like how bordercolor changes if pressed I want to change background color of textformfield if user selects it.