flutter实例1

http://laomengit.com/flutter/widgets/widgets_structure.html 控件大全


import 'package:flutter/material.dart';

class LayoutPage extends StatefulWidget {
  @override
  _LayoutPageState createState() => _LayoutPageState();
}

class _LayoutPageState extends State<LayoutPage> {

  @override
  Widget build(BuildContext context) {

    // titleSection*
    Widget titleSection = Container(
      padding: const EdgeInsets.all(32.0),
      // color: Colors.red,
      child: Row(
        children: [
          Expanded(
            child: Column(
              
              // 左靠齐 Column + start
              crossAxisAlignment: CrossAxisAlignment.start,
              children: [
                Container(
                  padding: const EdgeInsets.only(bottom: 8.0),
                  child: Text(
                    'If you have problems, you can check your code against lib/main.dart on GitHub.',
                    style: TextStyle(fontWeight: FontWeight.bold),
                  ),
                ),
                Text(
                  'Kandersteg, Switzerland',
                  style: TextStyle(color: Colors.grey),
                ),
              ],
            ),
          ),
          Icon(
            Icons.star,
            color: Colors.grey[500],
          ),
          Text('42'),
        ],
      ),
    );

    // buildButtonColumn
    Widget buildButtonColumn(IconData icon, String label) {
      Color color = Theme.of(context).primaryColor;
      return Column(
        mainAxisAlignment: MainAxisAlignment.center,
        mainAxisSize: MainAxisSize.min,
        children: [
          Icon(
            icon,
            color: color,
          ),
          Container(
            child: Text(
              label,
              style: TextStyle(
                  fontSize: 12.0, fontWeight: FontWeight.w400, color: color),
            ),
          )
        ],
      );
    }

    Widget buttonSetion = Container(
      child: Row(
        mainAxisAlignment: MainAxisAlignment.spaceEvenly,
        children: [
          buildButtonColumn(Icons.call, "CALL"),
          buildButtonColumn(Icons.near_me, "ROUTE"),
          buildButtonColumn(Icons.share,'SHARE'),
        ],
      ),
    );

   Widget textSection = Container(
     padding: const EdgeInsets.all(32.0),
     child:
      Text(
        '''
        Lake Oeschinen lies at the foot of the Blüemlisalp in the Bernese Alps.Situated 1,578 meters above sea level, it is one of the larger Alpine Lakes.A gondola ride from Kandersteg, followed by a half-hour walk through pastures and pine forest, leads you to the lake, which warms to 20 degrees Celsius in the summer.Activities enjoyed here include rowing, and riding the summer toboggan run.
        ''',
       softWrap: true,
     ),
   );

    return Scaffold(
      appBar: AppBar(
        title: Text('LayoutPage'),
      ),
      body: ListView(
        children: [
          Image.asset(
            'images/12.jpg',
            width: 600,
            height: 240,
            fit: BoxFit.cover,
          ),
          titleSection,
          buttonSetion,
          textSection,

        ],
      ),
    );
  }
}

// ------------titleSection  Start---------------
//   Widget titleSection = Container(
//     padding: const EdgeInsets.all(32.0),
//     // color: Colors.red,
//     child: Row(
//       children: [
//         Expanded(
//           child: Column(
//             crossAxisAlignment: CrossAxisAlignment.start,
//             children: [
//               Container(
//                 padding: const EdgeInsets.only(bottom: 8.0),
//                 child: Text(
//                   'If you have problems, you can check your code against lib/main.dart on GitHub.',
//                   style: TextStyle(fontWeight: FontWeight.bold),
//                 ),
//               ),
//               Text(
//                 'Kandersteg, Switzerland',
//                 style: TextStyle(color: Colors.grey),
//               ),
//             ],
//           ),
//         ),
//         Icon(
//           Icons.star,
//           color: Colors.grey[500],
//         ),
//         Text('42'),
//       ],
//     ),
//   );
// }
// ------------titleSection  End---------------

// ------------buildButtonColumn  Strat---------------

// ------------buildButtonColumn  End---------------