如何更改 flutter 中 textField 的下划线颜色？

Question

I have tried to define the Input decoration to change the color of underline of input TextField. But it's not working. can anyone suggest what am i missing here?

Here is the Code snippet:

decoration: InputDecoration(
    hintText: 'Username',
    hintStyle: TextStyle(color: Colors.white),
    border: new UnderlineInputBorder(
                                    borderSide: BorderSide(color: Colors.white, 
                                      width: 1.0, style: BorderStyle.none ),
    ),

Answer 1

decoration: InputDecoration(
  hintText: 'Username',
  hintStyle: TextStyle(color: Colors.white),
  enabledBorder: new UnderlineInputBorder(
    borderSide: BorderSide(
      color: Colors.white, 
      width: 1.0, 
      style: BorderStyle.none 
    ),
  ),
),

Just change border to enabledBorder . Hope this help!

Answer 2

We have to use both enabledBorder and focusedBorder .

• enabledBorder : It will work when TextField not having focus.
• focusedBorder : It will work when TextField has the focus.

enabledBorder: new UnderlineInputBorder(
  borderSide: BorderSide(
    color: Colors.black
  ),
),
// and:
focusedBorder: new UnderlineInputBorder(
  borderSide: BorderSide(
    color: Colors.black
  ),
),

Answer 3

You have to put widget hierarchy under MaterialApp .

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return new MaterialApp(
        title: 'Flutter WebView Demo',
        theme: new ThemeData(
          primarySwatch: Colors.blue,
        ),
          home: new Container(
             **//put widget here.**
        ));
  }
}

Answer 4

Just used -:

decoration: InputDecoration(        
  focusedBorder: UnderlineInputBorder(      
    borderSide: BorderSide(color: Colors.cyan),   
  ),    
),

it works for me :)

Answer 5

You can wrap your TextField in Theme and change accentColor like:

Theme(
  data: Theme.of(context).copyWith(accentColor: Colors.red),
  child: TextField(),
)

Answer 6

If you want change that blue line color, used this below code..it works

focusedBorder: OutlineInputBorder(borderSide: BorderSide(color: Colors.grey)

Answer 7

 child: TextField(

                  controller: email,
                  enabled: true,
                  keyboardType: TextInputType.emailAddress,
                  decoration: InputDecoration(

                    filled: true,
                    fillColor: Color(0xFFF2F2F2),
                    enabledBorder: new OutlineInputBorder(
                        borderSide: new BorderSide(color: Colors.orange)),
                    focusedBorder: OutlineInputBorder(
                      borderSide: BorderSide(color: Colors.orange),

                    ),
                    hintText: ' Email ',

                    icon: Icon(
                      Icons.email,
                      color: Colors.orange,
                      size: 30.0,
                    ),


                  )

                )