android_multi_display

Overview

Android Flutter plugin for managing multiple external displays with independent UI rendering and real-time data communication between screens.

✨ Features

Support up to 3 ordered displays (primary + secondary + tertiary)
Render independent Flutter UI on each screen
Real-time bidirectional messaging (host ↔ panels)
Fine control over display ordering and attachment

📸 Preview

Demo

🧠 How it works

Main app = Host (primary display)
External screens = Panels (secondary / tertiary)
Communication:
- Host → Panels: broadcast
- Panels → Host: panelBridge

🔧 Basic Usage

final controller = PanelController();

await controller.bootstrap(
  secondaryEntrypoint: 'secondaryDisplayMain',
  tertiaryEntrypoint: 'tertiaryDisplayMain', //Optional
);

await controller.activatePanels();

🔄 Messaging

Host → Panels (send from main app)

await controller.broadcast(
  action: 'demo_message',
  payload: {'tick': DateTime.now().millisecondsSinceEpoch},
);

Receive on panel entrypoint (secondaryDisplayMain / tertiaryDisplayMain):

import 'package:android_multi_display/panel_bridge.dart';

void _incoming({required String action, dynamic payload}) {
  debugPrint('from host: $action $payload');
}

@override
void initState() {
  super.initState();
  panelBridge.addListener(_incoming);
}

@override
void dispose() {
  panelBridge.removeListener(_incoming);
  super.dispose();
}

Panels → Host (send from panel)

await panelBridge.publish(
  action: 'panel_ping',
  payload: {'label': 'Panel A'},
);

Receive on host:

void _listenHostPayload({required String action, dynamic payload}) {
  debugPrint('from panel: $action $payload');
}

@override
void initState() {
  super.initState();
  controller.watchMessages(_listenHostPayload);
}

🧩 Panel Plugins

If you need to use Flutter plugins inside panel screens (like path_provider), you must register them during bootstrap.

await controller.bootstrap(
  secondaryEntrypoint: 'secondaryDisplayMain',
  tertiaryEntrypoint: 'tertiaryDisplayMain',  //Optional
  panelPluginClassNames: const [
    'io.flutter.plugins.pathprovider.PathProviderPlugin',
  ],
);

🤝 Contributing

Contributions are welcome!

If you have ideas, improvements, or bug fixes, feel free to open an issue or pull request on GitHub.

This plugin was partly inspired by external_display but redesigned with a focus on multi-display orchestration and messaging.

☕ Support / Donate

If this plugin helped you, consider supporting development:

💳 Card Payment

https://yekpay.io/en/azemdev

🪙 Crypto

USDT (TRC20): TJnFcaM8v4s5RVfo9H3jc38tH1HwdA2PkV

📄 License

MIT License