Flutter电池状态显示插件battery_indicator的使用
Flutter电池状态显示插件battery_indicator的使用
介绍
flutter_battery_indicator
是一个用于显示电池状态的Flutter插件。你可以使用手机的电池值来显示,也可以提供自己的电池级别值。该插件支持多种样式和自定义选项,如颜色、大小、比例等。
示例截图
以下是使用该插件的示例截图:
-
原生Flutter示例
-
使用GetX的示例
使用方法
1. 添加依赖
在 pubspec.yaml
文件中添加 battery_indicator
依赖:
dependencies:
battery_indicator: ^0.1.0
2. 使用手机电池值显示
你可以在布局中直接使用 BatteryIndicator
小部件来显示手机的电池状态。以下是一个完整的示例代码:
import 'package:flutter/material.dart';
import 'package:battery_indicator/battery_indicator.dart';
void main() => runApp(const MyApp());
class MyApp extends StatelessWidget {
const MyApp({super.key});
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: const MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatefulWidget {
const MyHomePage({Key? key, required this.title}) : super(key: key);
final String title;
@override
State<MyHomePage> createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
var _styleIndex = 0;
var _colorful = true;
var _showPercentSlide = true;
var _showPercentNum = false;
var _size = 18.0;
var _ratio = 3.0;
Color _color = Colors.blue;
// 颜色选择器
Widget getColorSelector(Color color) {
return GestureDetector(
onTap: () {
setState(() {
_color = color;
});
},
child: CircleAvatar(
backgroundColor: color,
),
);
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
SizedBox(
width: 200.0,
height: 100.0,
child: Center(
child: BatteryIndicator(
style: BatteryIndicatorStyle.values[_styleIndex], // 电池样式
colorful: _colorful, // 是否多彩
showPercentNum: _showPercentNum, // 是否显示百分比数字
mainColor: _color, // 主颜色
size: _size, // 大小
ratio: _ratio, // 比例
showPercentSlide: _showPercentSlide, // 是否显示百分比滑块
),
),
),
Padding(
padding: const EdgeInsets.all(8.0),
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: <Widget>[
const Text('颜色:'),
getColorSelector(Colors.blue),
getColorSelector(Colors.red),
getColorSelector(Colors.black),
getColorSelector(Colors.grey),
getColorSelector(Colors.yellow),
getColorSelector(Colors.green),
],
),
),
Padding(
padding: const EdgeInsets.all(8.0),
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: <Widget>[
const Text('大小:'),
Expanded(
child: Slider(
min: 8.0,
max: 48.0,
divisions: 300,
label: _size.toStringAsFixed(1),
value: _size,
onChanged: (val) {
setState(() {
_size = val;
});
},
),
),
const Text('比例:'),
Expanded(
child: Slider(
min: 1.0,
max: 4.0,
divisions: 30,
label: _ratio.toStringAsFixed(1),
value: _ratio,
onChanged: (val) {
setState(() {
_ratio = val;
});
},
),
),
],
),
),
Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: <Widget>[
const Text('多彩:'),
Checkbox(
value: _colorful,
onChanged: (val) {
setState(() {
_colorful = val ?? _colorful;
});
},
),
const Text('显示百分比数字:'),
Checkbox(
value: _showPercentNum,
onChanged: (val) {
setState(() {
_showPercentNum = val ?? _showPercentNum;
});
},
),
const Text('显示百分比滑块:'),
Checkbox(
value: _showPercentSlide,
onChanged: (val) {
setState(() {
_showPercentSlide = val ?? _showPercentSlide;
});
},
),
],
),
Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: <Widget>[
const Text('样式:'),
DropdownButton(
value: _styleIndex,
items: [
const DropdownMenuItem(
value: 0,
child: Text('扁平化'),
),
const DropdownMenuItem(
value: 1,
child: Text('拟物化'),
),
],
onChanged: (val) {
setState(() {
_styleIndex = val as int;
});
},
),
],
),
],
),
),
);
}
}
3. 提供自定义电池值
你还可以通过 batteryFromPhone
和 batteryLevel
参数来提供自定义的电池值。以下是一个示例代码:
import 'package:flutter/material.dart';
import 'package:battery_indicator/battery_indicator.dart';
void main() => runApp(const MyApp());
class MyApp extends StatelessWidget {
const MyApp({super.key});
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: const MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatefulWidget {
const MyHomePage({Key? key, required this.title}) : super(key: key);
final String title;
@override
State<MyHomePage> createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
int bat = 34; // 自定义电池值
void increment() {
setState(() {
if (bat < 100) {
bat++;
}
});
}
void decrement() {
setState(() {
if (bat > 0) {
bat--;
}
});
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
BatteryIndicator(
batteryFromPhone: false, // 不使用手机电池值
batteryLevel: bat, // 自定义电池值
style: BatteryIndicatorStyle.values[0], // 电池样式
colorful: true, // 是否多彩
showPercentNum: true, // 是否显示百分比数字
mainColor: Colors.blue, // 主颜色
size: 35.0, // 大小
ratio: 6.0, // 比例
showPercentSlide: true, // 是否显示百分比滑块
),
SizedBox(height: 20),
ElevatedButton(
onPressed: increment,
child: const Text('增加电池值'),
),
ElevatedButton(
onPressed: decrement,
child: const Text('减少电池值'),
),
],
),
),
);
}
}
4. 使用GetX管理电池值
如果你使用 GetX
状态管理库,可以通过 Obx
和 RxInt
来管理电池值。以下是一个示例代码:
home_view.dart
import 'package:flutter/material.dart';
import 'package:battery_indicator/battery_indicator.dart';
import 'package:get/get.dart';
class HomeView extends StatelessWidget {
final HomeController controller = Get.put(HomeController());
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text("Battery Indicator with GetX"),
),
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
Obx(() => BatteryIndicator(
batteryFromPhone: false,
batteryLevel: controller.bat.value,
style: controller.myStyle,
colorful: controller.colorful,
showPercentNum: controller.showPercentNum,
mainColor: controller.color,
size: controller.size,
ratio: controller.ratio,
showPercentSlide: controller.showPercentSlide,
)),
SizedBox(height: 20),
ElevatedButton(
onPressed: controller.increment,
child: Text('增加电池值'),
),
ElevatedButton(
onPressed: controller.decrement,
child: Text('减少电池值'),
),
],
),
),
);
}
}
home_controller.dart
import 'package:get/get.dart';
class HomeController extends GetxController {
// 0: 扁平化, 1: 拟物化
BatteryIndicatorStyle myStyle = BatteryIndicatorStyle.values[0];
var colorful = true.obs;
var showPercentSlide = true.obs;
var showPercentNum = true.obs;
var size = 35.0.obs;
var ratio = 6.0.obs;
Color color = Colors.blue;
RxInt bat = 35.obs;
void increment() {
if (bat.value < 100) {
bat.value++;
}
}
void decrement() {
if (bat.value > 0) {
bat.value--;
}
}
}
更多关于Flutter电池状态显示插件battery_indicator的使用的实战系列教程也可以访问 https://www.itying.com/category-92-b0.html
更多关于Flutter电池状态显示插件battery_indicator的使用的实战系列教程也可以访问 https://www.itying.com/category-92-b0.html
当然,以下是如何在Flutter项目中使用battery_indicator
插件来显示电池状态的代码示例。这个插件可以帮助你获取设备的电池状态信息,并在UI中展示。
1. 添加依赖
首先,在你的pubspec.yaml
文件中添加battery_indicator
依赖:
dependencies:
flutter:
sdk: flutter
battery_indicator: ^latest_version # 请替换为最新版本号
然后运行flutter pub get
来安装依赖。
2. 导入插件
在你的Dart文件中导入battery_indicator
插件:
import 'package:flutter/material.dart';
import 'package:battery_indicator/battery_indicator.dart';
3. 使用插件获取电池状态并显示
下面是一个完整的示例,展示了如何使用battery_indicator
插件获取电池状态并在UI中显示:
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Battery Indicator Example',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: BatteryStatusScreen(),
);
}
}
class BatteryStatusScreen extends StatefulWidget {
@override
_BatteryStatusScreenState createState() => _BatteryStatusScreenState();
}
class _BatteryStatusScreenState extends State<BatteryStatusScreen> {
BatteryState? _batteryState;
@override
void initState() {
super.initState();
_getBatteryState();
}
Future<void> _getBatteryState() async {
BatteryState batteryState = await BatteryIndicator.batteryState;
setState(() {
_batteryState = batteryState;
});
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('Battery Status'),
),
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
if (_batteryState != null)
Text(
'Battery Level: ${_batteryState!.level.toStringAsFixed(1)}%',
style: TextStyle(fontSize: 24),
),
SizedBox(height: 20),
if (_batteryState != null)
BatteryIndicator(
batteryState: _batteryState!,
builder: (context, level, isCharging) {
return Container(
decoration: BoxDecoration(
border: Border.all(color: Colors.black),
shape: BoxShape.circle,
),
child: Padding(
padding: const EdgeInsets.all(8.0),
child: isCharging
? Icon(
Icons.battery_charging_full,
color: Colors.green,
)
: Icon(
Icons.battery_full,
color: _getBatteryColor(level),
),
),
);
},
),
],
),
),
);
}
Color _getBatteryColor(double level) {
if (level >= 0.75) {
return Colors.green;
} else if (level >= 0.25) {
return Colors.orange;
} else {
return Colors.red;
}
}
}
解释
- 依赖添加:在
pubspec.yaml
中添加battery_indicator
依赖。 - 导入插件:在Dart文件中导入
battery_indicator
。 - 获取电池状态:在
initState
方法中调用BatteryIndicator.batteryState
来获取电池状态,并使用setState
更新状态。 - 显示电池状态:使用
Text
组件显示电池电量百分比,并使用BatteryIndicator
组件自定义电池图标显示。_getBatteryColor
方法根据电量百分比返回不同的颜色。
这样,你就可以在Flutter应用中显示电池状态了。希望这个示例对你有帮助!