Flutter电池信息获取插件battery_plus的使用

battery_plus简介

battery_plus 是一个Flutter插件，允许开发者访问应用程序运行设备的电池信息。它支持多种平台，包括Android、iOS、MacOS、Web、Linux和Windows。

平台支持

Requirements

• Flutter >=3.22.0
• Dart >=3.4.0 <4.0.0
• iOS >=12.0
• MacOS >=10.14
• Android compileSDK 34
• Java 17
• Android Gradle Plugin >=8.3.0
• Gradle wrapper >=8.4

使用方法

添加依赖

在你的pubspec.yaml文件中添加battery_plus作为依赖：

dependencies:
  flutter:
    sdk: flutter
  battery_plus: ^latest_version

示例代码

以下是一个完整的示例demo，展示了如何使用battery_plus来获取电池信息：

// Copyright 2020 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
import 'dart:async';

import 'package:flutter/material.dart';
import 'package:battery_plus/battery_plus.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(
        useMaterial3: true,
        colorSchemeSeed: const Color(0x9f4376f8),
      ),
      home: const MyHomePage(),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({super.key});

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  final Battery _battery = Battery();

  BatteryState? _batteryState;
  StreamSubscription<BatteryState>? _batteryStateSubscription;

  @override
  void initState() {
    super.initState();
    // 获取初始电池状态
    _battery.batteryState.then(_updateBatteryState);
    // 监听电池状态变化
    _batteryStateSubscription =
        _battery.onBatteryStateChanged.listen(_updateBatteryState);
  }

  void _updateBatteryState(BatteryState state) {
    if (_batteryState == state) return;
    setState(() {
      _batteryState = state;
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('Battery plus example app'),
        elevation: 4,
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            const Text(
              'Current battery state:',
              style: TextStyle(fontSize: 24),
            ),
            const SizedBox(height: 8),
            Text(
              '${_batteryState?.name}',
              style: const TextStyle(fontSize: 24),
            ),
            const SizedBox(height: 24),
            ElevatedButton(
              onPressed: () async {
                // 获取电池电量
                int batteryLevel = await _battery.batteryLevel;
                showDialog<void>(
                  context: context,
                  builder: (_) => AlertDialog(
                    content: Text('Battery: $batteryLevel%'),
                    actions: <Widget>[
                      TextButton(
                        onPressed: () {
                          Navigator.pop(context);
                        },
                        child: const Text('OK'),
                      )
                    ],
                  ),
                );
              },
              child: const Text('Get battery level'),
            ),
            const SizedBox(height: 24),
            ElevatedButton(
              onPressed: () async {
                // 检查是否处于省电模式
                bool isInPowerSaveMode = await _battery.isInBatterySaveMode;
                showDialog<void>(
                  context: context,
                  builder: (_) => AlertDialog(
                    title: const Text(
                      'Is in Battery Save mode?',
                      style: TextStyle(fontSize: 20),
                    ),
                    content: Text(
                      "$isInPowerSaveMode",
                      style: const TextStyle(fontSize: 18),
                    ),
                    actions: <Widget>[
                      TextButton(
                        onPressed: () {
                          Navigator.pop(context);
                        },
                        child: const Text('Close'),
                      )
                    ],
                  ),
                );
              },
              child: const Text('Is in Battery Save mode?'),
            )
          ],
        ),
      ),
    );
  }

  @override
  void dispose() {
    super.dispose();
    // 取消订阅
    if (_batteryStateSubscription != null) {
      _batteryStateSubscription!.cancel();
    }
  }
}

功能说明

• 获取当前电池电量：通过_battery.batteryLevel可以获取当前电池的电量百分比。
• 监听电池状态变化：通过_battery.onBatteryStateChanged.listen可以监听电池状态（如充电、放电等）的变化。
• 检查是否处于省电模式：通过_battery.isInBatterySaveMode可以检查设备是否处于省电模式。

学习更多

• API Documentation

以上就是battery_plus插件的详细使用方法及示例代码，希望对您有所帮助！