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Learn Dart: The First Step to Flutter

Solution: Smart Home Ecosystem

Explore how to build a smart home ecosystem by applying Dart's object-oriented programming concepts. Understand abstract classes, mixins for reusable logic, subclassing with constructors, and method overriding. This lesson helps you design scalable device models for real-world application development.

We'll cover the following...
Dart
abstract class SmartDevice {
  String deviceName;
  bool isOn = false;
  SmartDevice(this.deviceName);
  void togglePower() {
    isOn = !isOn;
  }
}
mixin Networkable {
  void connectToNetwork() {
    print('Connected to the home network.');
  }
}
class SmartLight extends SmartDevice with Networkable {
  int brightness;
  SmartLight(String deviceName, this.brightness) : super(deviceName);
  @override
  void togglePower() {
    super.togglePower();
    print('$deviceName is now ${isOn ? 'ON' : 'OFF'} at $brightness% brightness.');
  }
}
void main() {
  final light = SmartLight('Living Room Lamp', 75);
  light.connectToNetwork();
  light.togglePower();
}

Solution explanation

In the main.dart file:

  • Line 1: We declare SmartDevice as an abstract class, meaning it serves only as a blueprint and cannot be instantiated ...