Flutter-从入门到项目 06: 微信项目搭建

void main() {

  runApp(MyApp());
}


class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'WeChat',
      theme: ThemeData(
        highlightColor: Color.fromARGB(1, 0, 0, 0),
        splashColor: Color.fromARGB(1, 0, 0, 0),
        primarySwatch: Colors.blue,
        visualDensity: VisualDensity.adaptivePlatformDensity,
      ),
      home: KCRootPage(),
    );
  }
}

class KCRootPage extends StatefulWidget {

  @override
  _KCRootPageState createState() => _KCRootPageState();
}


class _KCRootPageState extends State<KCRootPage> {
  int _currentIndex = 0;
  List<Widget> _pages = [KCChatPage(),KCFriendsPage(),KCDiscoverPage(), KCMinePage()];
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: _pages[_currentIndex],
      bottomNavigationBar: BottomNavigationBar(
        onTap: (index){
          setState(() {
            _currentIndex = index;
          });
        },
        selectedFontSize: 12.0,
        currentIndex: _currentIndex,
        fixedColor: Colors.green,
        type: BottomNavigationBarType.fixed,
        items: [
          BottomNavigationBarItem(icon: Icon(Icons.chat),label: '微信'),
          BottomNavigationBarItem(icon: Icon(Icons.bookmark),label: '通讯录'),
          BottomNavigationBarItem(icon: Icon(Icons.history),label: '发现'),
          BottomNavigationBarItem(icon: Icon(Icons.person),label: '我'),
        ],
      ),
    );
  }
}

<item>

        <bitmap
            android:gravity="center"
            android:src="@mipmap/launch_image" />
    </item>

assets:

    - images/