52 lines
1.6 KiB
Dart
52 lines
1.6 KiB
Dart
import 'dart:async';
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import 'package:flutter_blue_plus/flutter_blue_plus.dart';
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class BluetoothHelper {
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static StreamSubscription<BluetoothAdapterState>? _subscription;
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/// 获取当前蓝牙是否开启（跨平台封装）
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// static Future<bool> isBluetoothOn({Duration timeout = const Duration(seconds: 2)}) async {
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// // 先尝试直接获取（Android 上几乎即时可用）
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// bool directCheck = await FlutterBluePlus.isOn;
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// if (directCheck) return true;
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// // iOS 上有初始化延迟，用 adapterState.first 再确认一次
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// try {
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// BluetoothAdapterState state = await FlutterBluePlus.adapterState
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// .firstWhere((s) => s != BluetoothAdapterState.unknown,
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// orElse: () => BluetoothAdapterState.unknown)
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// .timeout(timeout);
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// return state == BluetoothAdapterState.on;
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// } catch (_) {
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// return false;
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// }
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// }
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static Future<bool> isBluetoothOn(
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{Duration timeout = const Duration(seconds: 2)}) async {
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try {
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BluetoothAdapterState state = await FlutterBluePlus.adapterState
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.firstWhere((s) => s != BluetoothAdapterState.unknown)
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.timeout(timeout);
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return state == BluetoothAdapterState.on;
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} catch (_) {
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return false;
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}
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}
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/// 监听蓝牙状态变化
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static void listenBluetoothState(void Function(bool isOn) onChange) {
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_subscription?.cancel();
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_subscription = FlutterBluePlus.adapterState.listen((state) {
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onChange(state == BluetoothAdapterState.on);
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});
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}
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/// 停止监听
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static void cancelListener() {
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_subscription?.cancel();
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_subscription = null;
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}
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}
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