simplest_power_utilities 0.0.1

simplest_power_utilities: ^0.0.1 copied to clipboard

example/lib/main.dart

import 'dart:async';

import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:simplest_power_utilities/simplest_power_utilities.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Low Power Mode Demo',
      theme: ThemeData(
        colorScheme: ColorScheme.fromSeed(seedColor: Colors.blue),
        useMaterial3: true,
      ),
      home: const LowPowerModePage(),
    );
  }
}

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

  @override
  State<LowPowerModePage> createState() => _LowPowerModePageState();
}

class _LowPowerModePageState extends State<LowPowerModePage> {
  final _plugin = SimplestPowerUtilities();
  bool? _isLowPowerModeEnabled;
  String? _errorMessage;
  StreamSubscription<bool>? _subscription;
  int _updateCount = 0;

  @override
  void initState() {
    super.initState();
    _initializeState();
    _subscribeToChanges();
  }

  @override
  void dispose() {
    _subscription?.cancel();
    super.dispose();
  }

  Future<void> _initializeState() async {
    try {
      final isEnabled = await _plugin.isLowPowerModeEnabled();
      if (mounted) {
        setState(() {
          _isLowPowerModeEnabled = isEnabled;
          _errorMessage = null;
        });
      }
    } on PlatformException catch (e) {
      if (mounted) {
        setState(() {
          _errorMessage = 'Error: ${e.message}';
          _isLowPowerModeEnabled = null;
        });
      }
    } catch (e) {
      if (mounted) {
        setState(() {
          _errorMessage = 'Unexpected error: $e';
          _isLowPowerModeEnabled = null;
        });
      }
    }
  }

  void _subscribeToChanges() {
    _subscription = _plugin.onLowPowerModeChanged.listen(
      (isEnabled) {
        if (mounted) {
          setState(() {
            _isLowPowerModeEnabled = isEnabled;
            _updateCount++;
            _errorMessage = null;
          });
        }
      },
      onError: (error) {
        if (mounted) {
          setState(() {
            _errorMessage = 'Stream error: $error';
          });
        }
      },
    );
  }

  Future<void> _refreshStatus() async {
    await _initializeState();
  }

  Future<void> _launchBatterySettings() async {
    try {
      final success = await _plugin.launchBatterySettings();
      if (mounted) {
        ScaffoldMessenger.of(context).showSnackBar(
          SnackBar(
            content: Text(
              success
                  ? 'Battery settings opened successfully'
                  : 'Failed to open battery settings',
            ),
            backgroundColor: success
                ? Theme.of(context).colorScheme.primaryContainer
                : Theme.of(context).colorScheme.errorContainer,
            duration: const Duration(seconds: 2),
          ),
        );
      }
    } catch (e) {
      if (mounted) {
        ScaffoldMessenger.of(context).showSnackBar(
          SnackBar(
            content: Text('Error launching battery settings: $e'),
            backgroundColor: Theme.of(context).colorScheme.errorContainer,
            duration: const Duration(seconds: 3),
          ),
        );
      }
    }
  }

  @override
  Widget build(BuildContext context) {
    final theme = Theme.of(context);
    final colorScheme = theme.colorScheme;

    return Scaffold(
      appBar: AppBar(
        title: const Text('Low Power Mode Detection'),
        actions: [
          IconButton(
            icon: const Icon(Icons.refresh),
            onPressed: _refreshStatus,
            tooltip: 'Refresh status',
          ),
        ],
      ),
      body: SafeArea(
        child: SingleChildScrollView(
          padding: const EdgeInsets.all(16.0),
          child: Column(
            crossAxisAlignment: CrossAxisAlignment.stretch,
            children: [
              // Status Card
              Card(
                elevation: 2,
                child: Padding(
                  padding: const EdgeInsets.all(24.0),
                  child: Column(
                    children: [
                      Icon(
                        _isLowPowerModeEnabled == true
                            ? Icons.battery_saver
                            : _isLowPowerModeEnabled == false
                            ? Icons.battery_std
                            : Icons.battery_unknown,
                        size: 64,
                        color: _isLowPowerModeEnabled == true
                            ? colorScheme.error
                            : _isLowPowerModeEnabled == false
                            ? colorScheme.primary
                            : colorScheme.onSurfaceVariant,
                      ),
                      const SizedBox(height: 16),
                      Text(
                        _isLowPowerModeEnabled == true
                            ? 'Low Power Mode Enabled'
                            : _isLowPowerModeEnabled == false
                            ? 'Low Power Mode Disabled'
                            : 'Status Unknown',
                        style: theme.textTheme.headlineSmall?.copyWith(
                          fontWeight: FontWeight.bold,
                        ),
                      ),
                      const SizedBox(height: 8),
                      if (_errorMessage != null)
                        Padding(
                          padding: const EdgeInsets.only(top: 8.0),
                          child: Text(
                            _errorMessage!,
                            style: theme.textTheme.bodyMedium?.copyWith(
                              color: colorScheme.error,
                            ),
                            textAlign: TextAlign.center,
                          ),
                        ),
                    ],
                  ),
                ),
              ),
              const SizedBox(height: 24),
              // Details Card
              Card(
                elevation: 1,
                child: Padding(
                  padding: const EdgeInsets.all(16.0),
                  child: Column(
                    crossAxisAlignment: CrossAxisAlignment.start,
                    children: [
                      Text(
                        'Details',
                        style: theme.textTheme.titleMedium?.copyWith(
                          fontWeight: FontWeight.bold,
                        ),
                      ),
                      const SizedBox(height: 12),
                      _buildDetailRow(
                        context,
                        'Current Status',
                        _isLowPowerModeEnabled == null
                            ? 'Unknown'
                            : (_isLowPowerModeEnabled!
                                  ? 'Enabled'
                                  : 'Disabled'),
                      ),
                      const Divider(),
                      _buildDetailRow(
                        context,
                        'Updates Received',
                        '$_updateCount',
                      ),
                      const Divider(),
                      _buildDetailRow(
                        context,
                        'Stream Active',
                        _subscription != null ? 'Yes' : 'No',
                      ),
                    ],
                  ),
                ),
              ),
              const SizedBox(height: 24),
              // Launch Battery Settings Button
              Card(
                elevation: 1,
                child: Padding(
                  padding: const EdgeInsets.all(16.0),
                  child: Column(
                    crossAxisAlignment: CrossAxisAlignment.stretch,
                    children: [
                      Text(
                        'Battery Settings',
                        style: theme.textTheme.titleMedium?.copyWith(
                          fontWeight: FontWeight.bold,
                        ),
                      ),
                      const SizedBox(height: 12),
                      ElevatedButton.icon(
                        onPressed: _launchBatterySettings,
                        icon: const Icon(Icons.settings),
                        label: const Text('Open Battery Settings'),
                        style: ElevatedButton.styleFrom(
                          padding: const EdgeInsets.symmetric(
                            horizontal: 24.0,
                            vertical: 16.0,
                          ),
                        ),
                      ),
                      const SizedBox(height: 8),
                      Text(
                        'Tap to open your device\'s battery settings screen',
                        style: theme.textTheme.bodySmall?.copyWith(
                          color: colorScheme.onSurfaceVariant,
                        ),
                        textAlign: TextAlign.center,
                      ),
                    ],
                  ),
                ),
              ),
              const SizedBox(height: 24),
              // Information Card
              Card(
                elevation: 1,
                color: colorScheme.surfaceContainerHighest,
                child: Padding(
                  padding: const EdgeInsets.all(16.0),
                  child: Column(
                    crossAxisAlignment: CrossAxisAlignment.start,
                    children: [
                      Row(
                        children: [
                          Icon(
                            Icons.info_outline,
                            size: 20,
                            color: colorScheme.primary,
                          ),
                          const SizedBox(width: 8),
                          Text(
                            'Information',
                            style: theme.textTheme.titleMedium?.copyWith(
                              fontWeight: FontWeight.bold,
                            ),
                          ),
                        ],
                      ),
                      const SizedBox(height: 12),
                      Text(
                        'This app demonstrates real-time low power mode detection. '
                        'The status updates automatically when low power mode is enabled or disabled on your device.',
                        style: theme.textTheme.bodyMedium,
                      ),
                      const SizedBox(height: 8),
                      Text(
                        'To test: Enable or disable low power mode in your device settings and watch the status update in real-time.',
                        style: theme.textTheme.bodySmall?.copyWith(
                          color: colorScheme.onSurfaceVariant,
                        ),
                      ),
                    ],
                  ),
                ),
              ),
            ],
          ),
        ),
      ),
    );
  }

  Widget _buildDetailRow(BuildContext context, String label, String value) {
    final theme = Theme.of(context);
    return Row(
      mainAxisAlignment: MainAxisAlignment.spaceBetween,
      children: [
        Text(
          label,
          style: theme.textTheme.bodyMedium?.copyWith(
            color: theme.colorScheme.onSurfaceVariant,
          ),
        ),
        Text(
          value,
          style: theme.textTheme.bodyMedium?.copyWith(
            fontWeight: FontWeight.w500,
          ),
        ),
      ],
    );
  }
}