The Next Generation Task Scheduler for Flutter.

OrbitTask is engineered to seamlessly orchestrate background execution across the entire platform ecosystem. Beyond simple job scheduling, OrbitTask provides a unified, asteroid-proof API that abstracts away the complexities of native background processing.

• Unified API: Write your task logic once, run it anywhere (Android, iOS, Web).
• Persistent Execution: Uses native background APIs (WorkManager on Android, BGTaskScheduler on iOS) to ensure jobs run even when the app is terminated.
• Web Support: Seamlessly falls back to Timer-based scheduling on Web (WASM compatible).
• Isolate Powered: Offloads heavy lifting to background isolates to keep your UI frame-perfect.
• Constraint-Based: Schedule tasks that only run when conditions are met (e.g., Device Charging, Network Connected).
• Zero External Dependencies: Built from the ground up for maximum control and performance.

OrbitTask uses a federated plugin architecture:

• Core: OrbitTask facade for easy API usage.
• Platform Interface: OrbitTaskPlatform for establishing contracts.
• Android: Custom orbit_task_android package wrapping WorkManager.
• iOS: Custom orbit_task_ios package wrapping BGTaskScheduler.
• Web: Lightweight orbit_task_web package using native Dart Timers.

// 1. Define a top-level dispatcher
@pragma('vm:entry-point')
void callbackDispatcher() {
  // Initialize and handle background events
}

// 2. Or use the new Annotation API (Coming Soon)
@orbitTask
Future<void> myBackgroundTask(Map<String, dynamic> args) async {
  print("Running background task!");
}

void main() async {
  // 3. Initialize OrbitTask
  await OrbitTask.instance.initialize(
    dispatcher: callbackDispatcher
  );

  // 4. Schedule via Facade
  await OrbitTask.instance.scheduleOneTime(
    taskName: "sync_heavy_data",
    constraints: TaskConstraints(requiresNetwork: true),
  );
}

OrbitTask now supports code generation to simplify task registration!

1. Add orbit_task_annotations and orbit_task_generator.
2. Annotate your top-level functions with @orbitTask.
3. Run dart run build_runner build. This mechanism will eventually automate the boilerplate of callbackDispatcher.

Existing solutions often force you to choose between robust native persistence and cross-platform flexibility. OrbitTask gives you both. It is designed from the ground up to be the default choice for modern Flutter applications that demand reliability without the boilerplate.