47 lines
950 B
Dart
47 lines
950 B
Dart
import 'dart:async';
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import 'package:flutter/material.dart';
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import 'sensor_data.dart';
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import 'sensor_service.dart';
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class SensorProvider with ChangeNotifier {
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final SensorService _service = SensorService();
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SensorData? _sensorData;
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Exception? _exception;
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SensorData? get sensorData => _sensorData;
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Exception? get exception => _exception;
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Timer? _timer;
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Future<void> fetchData() async {
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try {
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_sensorData = await _service.fetchSensorData();
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} on Exception catch (e) {
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_exception = e;
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_sensorData = null;
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}
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notifyListeners();
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}
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void startAutoFetch(Duration interval) {
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_timer = Timer.periodic(interval, (timer) async {
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await fetchData();
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});
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}
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// Stop auto-fetching
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void stopAutoFetch() {
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_timer?.cancel();
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_timer = null;
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}
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// Dispose the timer when the provider is disposed
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@override
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void dispose() {
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_timer?.cancel();
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super.dispose();
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}
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} |