디자인 위젯

class MyCard extends StatelessWidge {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: Colors.amber[800],
      appBar: AppBar(
        title: Text('BBANTO'),
        centerTitle: true,
        backgroundColor: Colors.amber[700],
        elevation: 0.0,
      ),
      body: Padding(
        padding: EdgeInsets.fromLTRB(30.0,40.0, 0.0, 0.0),
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start, 
          // 가로축 정렬 (mainAxisAlignment: 세로축 정렬)
          children: [
            Center(
              child: CircleAvatar(
                backgroundImage: AssetImage(
                  'asserts/flying.gif',
                ),
                radius: 60.0,
              ),
            ), // Center
            Divider(
              height: 60.0,
              color: Colors.grey[850],
              thickness: 0.5,
              endIndent: 30.0,
            ), // Divider
            Text('Name', 
              style: TextStyle(
                color: Colors.white, // 글자색 
                letterSpacing: 2.0,  // 글자 간격 
              ),
            ),
            SizedBox(heigth, 10.0),
            Text('BBANTO', 
              style: TextStyle(
                color: Colors.white, // 글자색 
                letterSpacing: 2.0,  // 글자 간격 
                fontSize: 28.0,
                fontWeight: FontWeight.bold,
              )
            ),
            const SizedBox(
              height: 30.0,
            ),
            const Text(
              'BBANTO POWER LEVEL',
              style: TextStyle(
                color: Colors.white, 
                letterSpacing: 2.0
              ),
            ),
            SizedBox(
              height: 10.0,
            ),
            Text(
              '14',
              style: TextStyle(
                color: Colors.white,
                letterSpacing: 2.0,
                fontSize: 28.0,
                fontWeight: FontWeight.bold
              ),
            ),// Text
            const SizedBox(
              height: 30.0,
            ),            
            Row( children: [
			  Icon(Icons.check_circle_outline),
              SizedBox(width: 10.0,),
              Text('using lightsaber',
                style: TextStyle(
                  fontSize: 16.0, 
                  letterSpacing: 1.0
                ),
              ), // Text
            ]), // Row
            Row(
              children: [
                Icon(Icons.check_circle_outline),
                SizedBox(
                  width: 10.0,
                ),
                Text(
                  'face hero tatto',
                  style: TextStyle(
                    fontSize: 16.0, 
                    letterSpacing: 1.0
                  ),
                ),
              ],
            ), // Row
            Row(
              children:  [
                Icon(Icons.check_circle_outline),
                SizedBox(
                  width: 10.0,
                ),
                Text(
                  'fire frames',
                  style: TextStyle(
                    fontSize: 16.0, 
                    letterSpacing: 1.0
                  ),
                ),
              ],
            ), // Row
            Center(
              child: CircleAvatar(
                backgroundImage: AssetImage('assets/bbanto.png'),
                radius: 40.0,
                backgroundColor: Colors.amber[800],
              ),
            )    // Center      
          ],
        ), // Row  
      )
    );
  }
}

Padding : 여백 EdgeInsets으로 설정
SizedBox(): 위젯간에 간격을 벌이고 싶을때 사용
Center(): 가운데로 보냄
Column() : 세로축에 제한이 없음.
column에서 mainAxisAlignment 컬럼의 항목의 정렬 (세로축에 관련)
가로축 정렬: crossAxisAlignmemt
Center() + Column() => 가로축에 대해서면 가운데로 보냄..
Text(),
TextStyle()
Icon()
CircleAvatar()
AssetImage()
Divider()

assets 사용법
pubspec.yml 에서
assets:항목 밑에 이미지 폴더를 지정해야 함.

assets:
  - images/