قنوات المنصّة (Platform Channels)

import 'package:flutter/services.dart';

class BatteryService {
  static const platform = MethodChannel('com.thecodefix/battery');

  static Future<int> getBatteryLevel() async {
    try {
      final int result = await platform.invokeMethod('getBatteryLevel');
      return result;
    } on PlatformException catch (e) {
      throw Exception('فشل قراءة مستوى البطارية: ${e.message}');
    }
  }
}

class MainActivity: FlutterActivity() {
    private val CHANNEL = "com.thecodefix/battery"

    override fun configureFlutterEngine(flutterEngine: FlutterEngine) {
        super.configureFlutterEngine(flutterEngine)
        MethodChannel(flutterEngine.dartExecutor.binaryMessenger, CHANNEL)
            .setMethodCallHandler { call, result ->
                if (call.method == "getBatteryLevel") {
                    val level = getBatteryLevelNative()
                    result.success(level)
                } else {
                    result.notImplemented()
                }
            }
    }
}

class BatteryWidget extends StatefulWidget {
  @override
  State<BatteryWidget> createState() => _BatteryWidgetState();
}

class _BatteryWidgetState extends State<BatteryWidget> {
  String _batteryLevel = 'غير معروف';

  Future<void> _getBattery() async {
    try {
      final level = await BatteryService.getBatteryLevel();
      setState(() => _batteryLevel = '$level%');
    } catch (e) {
      setState(() => _batteryLevel = 'خطأ');
    }
  }

  @override
  Widget build(BuildContext context) {
    return Column(
      children: [
        Text('مستوى البطارية: $_batteryLevel'),
        ElevatedButton(onPressed: _getBattery, child: Text('تحديث')),
      ],
    );
  }
}