Android开发组件flutter的20个常用技巧示例总结

Container(
    // padding: EdgeInsets.symmetric(horizontal: 50),
    // constraints: BoxConstraints.tightFor(width: 200.0, height: 150.0),
    color: Colors.white,
    child: Align(
        alignment: Alignment.center,
        child: FittedBox( // 当一行放不下时会自适应调整组件大小
            child: Row(
                children: [
                    ElevatedButton(onPressed: () => {}, child: Text("电塔")),
                    ElevatedButton(onPressed: () => {}, child: Text("嘿嘿")),
                    ElevatedButton(onPressed: () => {}, child: Text("哟西")),
                    ElevatedButton(onPressed: () => {}, child: Text("是蚕丝")),
                ]
                .map((e) => Padding( // 遍历设置组件左内边距
                    padding: EdgeInsets.only(left: 30), child: e))
                .toList()),
        ),
    ));

SafeArea( // 实质就是添加一个边距，解决iOS最外边弧角导致的被遮挡
        minimum: EdgeInsets.all(30),
    chird:...
    )

Wrap(
    children: dataList
    .map((item) => Container(
        decoration: BoxDecoration(color: Colors.red),
        width: (MediaQuery.of(context).size.width - 10 * 3) / 2, // 适配屏幕一行放两个，并且三个缝隙间隔
    ))
    .toList(),
)

Text(
    data.title,
    maxLines: 1,
    overflow: TextOverflow.ellipsis,
),

Expanded(
    child: Container(
        height: 34,
        decoration: BoxDecoration(
            color: Colors.grey[200],
            borderRadius: BorderRadius.circular(17)),
        margin: const EdgeInsets.only(right: 10),
        child: const TextField(
            decoration: InputDecoration(
                hintText: "请输入搜索词",
                hintStyle: TextStyle(color: Colors.grey, fontSize: 14),
                contentPadding: EdgeInsets.only(top: 1, left: -10),
                border: InputBorder.none,
                icon: Padding(
                    padding: EdgeInsets.only(left: 10, top: 5),
                    child: Icon(
                        Icons.search,
                        size: 18,
                        color: Colors.grey,
                    )),
                suffixIcon: Icon(
                    Icons.close,
                    size: 18,
                ))),
    )),

ElevatedButton(
    onPressed: () {
        CommonToast.showToast("退出登录");
    },
    style: ButtonStyle(
        backgroundColor: MaterialStateProperty.all<Color>(Colors.red),
    ),
    child: const Text(
        '退出登录',
        style: TextStyle(color: Colors.white),
    )
),
TextButton(
  style: TextButton.styleFrom(primary: Colors.green),
)

import 'package:Flutter/material.dart';
import 'package:hook_up_rent/pages/home/tab_search/data_list.dart';
import 'package:hook_up_rent/widgets/room_list_item_widget.dart';
class RoomManagePage extends StatelessWidget {
  const RoomManagePage({Key? key}) : super(key: key);
  @override
  Widget build(BuildContext context) {
    return DefaultTabController(
        length: 2,
        initialIndex: 0,
        child: Scaffold(
          appBar: AppBar(
            title: Text("房屋管理"),
            centerTitle: true,
            bottom: TabBar(
              tabs: [
                Tab(
                  text: "空置",
                ),
                Tab(
                  text: "已租",
                )
              ],
            ),
          ),
          body: TabBarView(
            children: [
              ListView(
                children:
                    dataList.map((item) => RoomListItemWidget(item)).toList(),
              ),
              ListView(
                children:
                    dataList.map((item) => RoomListItemWidget(item)).toList(),
              )
            ],
          ),
        ));
  }
}

GestureDetector(
  behavior: HitTestBehavior.translucent, // 加上即可

var buttonTextStyle = TextStyle(
    color: Theme.of(context).primaryColor,
    fontWeight: FontWeight.w600);

Text(
    data.subTitle ?? '暂无房屋概况',
    maxLines: showAllText ? null : 2,
),

actions: [Container()], // 填一个空元素占位，可以填充掉默认的抽屉图标，此时通过左右滑动打开对应抽屉

Container(
    decoration: BoxDecoration(
        image: DecorationImage(
            image: AssetImage('static/images/loading.jpg'),
            fit: BoxFit.fill)),
);

@override
void initState() {
    super.initState();
    ///循环执行
    ///间隔1秒
    _timer = Timer.periodic(Duration(milliseconds: 1000), (timer) {
        ///自增
        curentTimer++;
        ///到5秒后停止 
        if (curentTimer == 5) {
            _timer.cancel();
        }
        setState(() {});
    });
}
@override
void dispose() {
    ///取消计时器
    _timer.cancel();
    super.dispose();
}

// 直接给Container加上如下属性即可
decoration: BoxDecoration(
    color: Colors.white,
    borderRadius: BorderRadius.circular(8.0),
    boxShadow: [
        BoxShadow(
            color: Colors.black12,
            offset: Offset(0.0, 15.0), //阴影xy轴偏移量
            blurRadius: 15.0, //阴影模糊程度
            spreadRadius: 1.0 //阴影扩散程度
        )
    ]),

// 关闭键盘
void _hideKeyboard() {
    FocusScopenode currentFocus = FocusScope.of(context);
    if (!currentFocus.hasPrimaryFocus && currentFocus.focusedChild != null) {
        /// 取消焦点，相当于关闭键盘
        FocusManager.instance.primaryFocus!.unfocus();
    }
}
// 在页面最外层包裹一个点击事件
GestureDetector(
        onTap: _hideKeyboard,
        child: Scaffold(

return LayoutBuilder(builder: (context, constrains) {
      var maxWidth = constrains.maxWidth; // 获取父级容器大小
    return Wrap()
}

Listener(
// 使用listener事件能够继续传递
  onPointerDown: (event) {
    setState(() {
      isExpand = !isExpand;
    });
  },
  child: Text('点我'),
),