117 lines
3.1 KiB
Dart
117 lines
3.1 KiB
Dart
import 'dart:async';
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import 'package:flutter_reactive_ble/flutter_reactive_ble.dart';
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import 'package:get/get.dart';
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import 'package:meta/meta.dart';
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/// 这个类负责开启和关闭蓝牙扫描器并输出扫描结果
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class BleScanner extends GetxController {
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BleScanner({
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required FlutterReactiveBle ble,
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required void Function(String message) logMessage,
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}) : _ble = ble,
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_logMessage = logMessage {
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rxBleScannerState.bindStream(_stateStreamController.stream);
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}
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// static BleScanner get to => Get.find<BleScanner>();
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final FlutterReactiveBle _ble;
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/// 输入 FlutterReactiveBle 来获取结果及功能
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final void Function(String message) _logMessage;
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/// 输入日志函数来输出日志
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final StreamController<BleScannerState> _stateStreamController =
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StreamController();
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StreamSubscription? _subscription;
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/// 使用 Getx 的 Rx 来监听扫描结果
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final rxBleScannerState = Rx<BleScannerState>(
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const BleScannerState(discoveredDevices: [], scanIsInProgress: false));
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final _devices = <DiscoveredDevice>[];
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/// 开始扫描蓝牙设备
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void startScan(List<Uuid> serviceIds) {
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_logMessage('Start ble discovery');
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_devices.clear();
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_subscription?.cancel();
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_subscription = _ble.scanForDevices(withServices: serviceIds).listen((device) {
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print("11111111111111111:${device}");
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final knownDeviceIndex = _devices.indexWhere((d) => d.id == device.id);
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if (knownDeviceIndex >= 0) {
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_devices[knownDeviceIndex] = device;
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} else {
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// if (device.name.toLowerCase().contains((filter.name ?? "".toLowerCase()))) {
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// if (device.id.contains((filter.mac ?? ""))) {
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// if (device.rssi >= (filter.rssi ?? -100)) {
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_devices.add(device);
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// }
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// }
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// }
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}
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_pushState();
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}, onError: (Object e) => _logMessage('Device scan fails with error: $e'));
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_pushState();
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}
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/// 更新扫描结果
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void _pushState() {
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_stateStreamController.add(
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BleScannerState(
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discoveredDevices: _devices,
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scanIsInProgress: _subscription != null,
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),
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);
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}
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/// 停止扫描蓝牙设备
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Future<void> stopScan() async {
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_logMessage('Stop ble discovery');
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await _subscription?.cancel();
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_subscription = null;
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_pushState();
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}
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/// GetxController 的生命周期函数，当页面关闭时，关闭扫描器
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@override
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Future<void> onClose() async {
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rxBleScannerState.close();
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await _stateStreamController.close();
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super.onClose();
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}
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}
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/// 这个类用来存储扫描到的蓝牙设备以及扫描器状态
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@immutable
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class BleScannerState {
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const BleScannerState({
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required this.discoveredDevices,
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required this.scanIsInProgress,
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});
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final List<DiscoveredDevice> discoveredDevices;
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final bool scanIsInProgress;
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}
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/// 这个类用来存储扫描器的过滤器
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class BleScannerFilter {
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String? name;
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String? mac;
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List<Uuid>? serviceId;
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int? rssi;
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BleScannerFilter({
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this.name,
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this.mac,
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this.serviceId,
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this.rssi,
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});
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}
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