time_listener

A Flutter plugin for listening to time changes via a stream. The time-checking loop runs in an isolate, keeping the UI thread free.

Features

• Stream-based API — subscribe with any stream listener or StreamBuilder
• Isolate-backed — no impact on UI performance
• Two intervals: per-minute (default) or per-second

Usage

Create a TimeListener with the async factory, then subscribe to .stream:

final listener = await TimeListener.create();

final subscription = listener.stream.listen((DateTime dt) {
  print('${dt.hour}:${dt.minute}');
});

// When no longer needed:
subscription.cancel();
listener.dispose();

Use CheckInterval.seconds for per-second updates:

final listener = await TimeListener.create(interval: CheckInterval.seconds);

listener.stream.listen((DateTime dt) {
  print('${dt.hour}:${dt.minute}:${dt.second}');
});

In a Flutter widget, use StreamBuilder:

FutureBuilder<TimeListener>(
  future: TimeListener.create(),
  builder: (context, snapshot) {
    if (!snapshot.hasData) return const SizedBox();
    return StreamBuilder<DateTime>(
      stream: snapshot.data!.stream,
      builder: (context, snap) {
        final dt = snap.data ?? DateTime.now();
        return Text('${dt.hour}:${dt.minute.toString().padLeft(2, '0')}');
      },
    );
  },
)

API

CheckInterval values: minutes, seconds.