init project

example/lib/widgets/amap_gridview.dart

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+import 'package:flutter/material.dart';
+
+class AMapGradView extends StatefulWidget {
+  ///子控件列表
+  final List<Widget> childrenWidgets;
+
+  ///一行的数量
+  final int? crossAxisCount;
+
+  ///宽高比
+  final double? childAspectRatio;
+
+  AMapGradView(
+      {Key? key,
+      this.crossAxisCount,
+      this.childAspectRatio,
+      required this.childrenWidgets})
+      : super(key: key);
+  @override
+  _GradViewState createState() => _GradViewState();
+}
+
+class _GradViewState extends State<AMapGradView> {
+  @override
+  Widget build(BuildContext context) {
+    return GridView.count(
+        primary: false,
+        physics: new NeverScrollableScrollPhysics(),
+        //水平子Widget之间间距
+        crossAxisSpacing: 1.0,
+        //垂直子Widget之间间距
+        mainAxisSpacing: 0.5,
+        //一行的Widget数量
+        crossAxisCount: widget.crossAxisCount ?? 2,
+        //宽高比
+        childAspectRatio: widget.childAspectRatio ?? 4,
+        children: widget.childrenWidgets,
+        shrinkWrap: true);
+  }
+}

example/lib/widgets/amap_radio_group.dart

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+import 'package:amap_map_example/widgets/amap_gridview.dart';
+import 'package:flutter/material.dart';
+
+class AMapRadioGroup<T> extends StatefulWidget {
+  final String? groupLabel;
+  final T? groupValue;
+  final Map<String, T>? radioValueMap;
+  final ValueChanged<T>? onChanged;
+  AMapRadioGroup(
+      {Key? key,
+      this.groupLabel,
+      this.groupValue,
+      this.radioValueMap,
+      this.onChanged})
+      : super(key: key);
+
+  @override
+  _AMapRadioGroupState createState() => _AMapRadioGroupState();
+}
+
+class _AMapRadioGroupState extends State<AMapRadioGroup> {
+  dynamic _groupValue;
+
+  @override
+  void initState() {
+    super.initState();
+    _groupValue = widget.groupValue ?? null;
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    List<Widget> radioList = <Widget>[];
+    _groupValue = widget.groupValue ?? null;
+    Widget _myRadio(String label, dynamic radioValue) {
+      return Row(
+        mainAxisAlignment: MainAxisAlignment.center,
+        children: [
+          Text(label),
+          Radio<dynamic>(
+            value: radioValue,
+            groupValue: _groupValue,
+            onChanged: (_value) {
+              setState(() {
+                _groupValue = _value;
+              });
+              if (null != widget.onChanged) {
+                widget.onChanged!(_value);
+              }
+            },
+          ),
+        ],
+      );
+    }
+
+    if (widget.radioValueMap != null) {
+      widget.radioValueMap!.forEach((key, value) {
+        radioList.add(_myRadio(key, value));
+      });
+    }
+    return Container(
+      padding: EdgeInsets.all(5),
+      child: Column(
+        crossAxisAlignment: CrossAxisAlignment.start,
+        mainAxisSize: MainAxisSize.min,
+        children: [
+          Text(widget.groupLabel!),
+          Container(
+            padding: EdgeInsets.only(left: 10),
+            child: AMapGradView(
+              childrenWidgets: radioList,
+            ),
+          ),
+        ],
+      ),
+    );
+  }
+}

example/lib/widgets/amap_switch_button.dart

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+import 'package:flutter/material.dart';
+
+typedef void OnChanged(bool value);
+
+class AMapSwitchButton extends StatefulWidget {
+  const AMapSwitchButton({
+    Key? key,
+    this.label,
+    this.onSwitchChanged,
+    this.defaultValue = true,
+  }) : super(key: key);
+
+  final Text? label;
+  final Function? onSwitchChanged;
+  final bool defaultValue;
+
+  @override
+  State<StatefulWidget> createState() => _SwitchButtonState();
+}
+
+class _SwitchButtonState extends State<AMapSwitchButton> {
+  late bool _localValue;
+  @override
+  void initState() {
+    super.initState();
+    _localValue = widget.defaultValue;
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Row(
+      mainAxisSize: MainAxisSize.min,
+      children: [
+        Container(
+          child: Row(
+            mainAxisAlignment: MainAxisAlignment.center,
+            mainAxisSize: MainAxisSize.min,
+            children: <Widget>[
+              widget.label!,
+              Switch(
+                value: _localValue,
+                onChanged: (null != widget.onSwitchChanged)
+                    ? (value) {
+                        setState(() {
+                          _localValue = value;
+                        });
+                        widget.onSwitchChanged!(value);
+                      }
+                    : null,
+              ),
+            ],
+          ),
+        ),
+      ],
+    );
+  }
+}

example/lib/widgets/demo_group.dart

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+import 'package:amap_map_example/base_page.dart';
+import 'package:flutter/material.dart';
+
+class DemoGroupWidget extends StatefulWidget {
+  final String groupLabel;
+  final List<BasePage>? itemPages;
+
+  DemoGroupWidget({Key? key, required this.groupLabel, this.itemPages})
+      : super(key: key);
+  @override
+  State<StatefulWidget> createState() => _GroupState();
+}
+
+class _GroupState extends State<DemoGroupWidget> {
+  void _pushPage(BuildContext context, BasePage page) {
+    Navigator.of(context).push(MaterialPageRoute<void>(
+        builder: (_) => Scaffold(
+              appBar: AppBar(title: Text(page.title)),
+              body: page,
+            )));
+  }
+
+  bool _hasItemPages = false;
+  @override
+  void initState() {
+    super.initState();
+    if (widget.itemPages != null && widget.itemPages!.length > 0) {
+      _hasItemPages = true;
+    } else {
+      _hasItemPages = false;
+    }
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Column(
+      mainAxisAlignment: MainAxisAlignment.start,
+      crossAxisAlignment: CrossAxisAlignment.stretch,
+      children: [
+        ListTile(
+            title: Text(
+          widget.groupLabel,
+          style: TextStyle(fontWeight: FontWeight.w600, fontSize: 18),
+        )),
+        Divider(height: 1),
+        Container(
+          padding: EdgeInsets.only(left: 10),
+          child: _hasItemPages
+              ? ListView.separated(
+                  shrinkWrap: true,
+                  physics: NeverScrollableScrollPhysics(),
+                  itemCount: widget.itemPages!.length,
+                  itemBuilder: (_, int index) => ListTile(
+                    title: Text(widget.itemPages![index].title),
+                    subtitle: Text(widget.itemPages![index].subTitle),
+                    onTap: () => _pushPage(context, widget.itemPages![index]),
+                  ),
+                  separatorBuilder: (BuildContext context, int index) =>
+                      Divider(
+                    height: 1,
+                    indent: 16,
+                  ),
+                )
+              : null,
+        ),
+        Divider(height: 1),
+      ],
+    );
+  }
+}

example/lib/widgets/toast.dart

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+import 'package:flutter/material.dart';
+
+//Toast 显示位置控制
+enum ToastPostion {
+  top,
+  center,
+  bottom,
+}
+
+class Toast {
+  // toast靠它加到屏幕上
+  static OverlayEntry? _overlayEntry;
+  // toast是否正在showing
+  static bool _showing = false;
+  // 开启一个新toast的当前时间，用于对比是否已经展示了足够时间
+  static DateTime? _startedTime;
+  // 提示内容
+  static String? _msg;
+  // toast显示时间
+  static int _showTime = 10;
+  // 背景颜色
+  static Color? _bgColor;
+  // 文本颜色
+  static Color? _textColor;
+  // 文字大小
+  static double? _textSize;
+  // 显示位置
+  static ToastPostion? _toastPosition;
+  // 左右边距
+  static double? _pdHorizontal;
+  // 上下边距
+  static double? _pdVertical;
+  static void toast(
+    BuildContext context, {
+    //显示的文本
+    String? msg,
+    //显示的时间 单位毫秒
+    int showTime = 1000,
+    //显示的背景
+    Color bgColor = Colors.black,
+    //显示的文本颜色
+    Color textColor = Colors.white,
+    //显示的文字大小
+    double textSize = 14.0,
+    //显示的位置
+    ToastPostion position = ToastPostion.center,
+    //文字水平方向的内边距
+    double pdHorizontal = 20.0,
+    //文字垂直方向的内边距
+    double pdVertical = 10.0,
+  }) async {
+    assert(msg != null);
+    _msg = msg;
+    _startedTime = DateTime.now();
+    _showTime = showTime;
+    _bgColor = bgColor;
+    _textColor = textColor;
+    _textSize = textSize;
+    _toastPosition = position;
+    _pdHorizontal = pdHorizontal;
+    _pdVertical = pdVertical;
+    //获取OverlayState
+    OverlayState overlayState = Overlay.of(context)!;
+    _showing = true;
+    if (_overlayEntry == null) {
+      //OverlayEntry负责构建布局
+      //通过OverlayEntry将构建的布局插入到整个布局的最上层
+      _overlayEntry = OverlayEntry(
+          builder: (BuildContext context) => Positioned(
+                //top值，可以改变这个值来改变toast在屏幕中的位置
+                top: buildToastPosition(context),
+                child: Container(
+                    alignment: Alignment.center,
+                    width: MediaQuery.of(context).size.width,
+                    child: Padding(
+                      padding: EdgeInsets.symmetric(horizontal: 40.0),
+                      child: AnimatedOpacity(
+                        opacity: _showing ? 1.0 : 0.0, //目标透明度
+                        duration: _showing
+                            ? Duration(milliseconds: 100)
+                            : Duration(milliseconds: 400),
+                        child: _buildToastWidget(),
+                      ),
+                    )),
+              ));
+      //插入到整个布局的最上层
+      overlayState.insert(_overlayEntry!);
+    } else {
+      //重新绘制UI，类似setState
+      _overlayEntry!.markNeedsBuild();
+    }
+    // 等待时间
+    await Future.delayed(Duration(milliseconds: _showTime));
+    //2秒后 到底消失不消失
+    if (DateTime.now().difference(_startedTime!).inMilliseconds >= _showTime) {
+      _showing = false;
+      _overlayEntry!.markNeedsBuild();
+      await Future.delayed(Duration(milliseconds: 400));
+      _overlayEntry!.remove();
+      _overlayEntry = null;
+    }
+  }
+
+  //toast绘制
+  static _buildToastWidget() {
+    return Center(
+      child: Card(
+        color: _bgColor,
+        child: Padding(
+          padding: EdgeInsets.symmetric(
+              horizontal: _pdHorizontal!, vertical: _pdVertical!),
+          child: Text(
+            _msg!,
+            style: TextStyle(
+              fontSize: _textSize,
+              color: _textColor,
+            ),
+          ),
+        ),
+      ),
+    );
+  }
+
+//  设置toast位置
+  static buildToastPosition(context) {
+    var backResult;
+    if (_toastPosition == ToastPostion.top) {
+      backResult = MediaQuery.of(context).size.height * 1 / 4;
+    } else if (_toastPosition == ToastPostion.center) {
+      backResult = MediaQuery.of(context).size.height * 2 / 5;
+    } else {
+      backResult = MediaQuery.of(context).size.height * 3 / 4;
+    }
+    return backResult;
+  }
+}