Unable to obtain Bluetooth devices connected to the system

[xcjpdx]

Requirements

• I've looked at the README 'Common Problems' section

Have you checked this problem on the example app?

Yes

FlutterBluePlus Version

1.32.7

Flutter Version

3.22.3

What OS?

Android

OS Version

Android 13

Bluetooth Module

systemDevices

What is your problem?

The following image is my permission list

The following is a code snippet of mine. What I want to implement is to obtain the required permissions and access the Bluetooth devices connected to the system：
import 'dart:convert';
import 'dart:async';
import 'package:flutter_blue_plus/flutter_blue_plus.dart' as flutter_blue;
import 'package:permission_handler/permission_handler.dart';
import './globals.dart';
import '../apis/app.dart';
import 'package:flutter/services.dart';
import 'dart:io';
import 'package:flutter_easyloading/flutter_easyloading.dart';
import 'dart:ui';

class BluetoothService {
flutter_blue.BluetoothCharacteristic? targetCharacteristic;

List<flutter_blue.BluetoothDevice> _systemDevices = [];
flutter_blue.BluetoothDevice? targetDevice;
StreamSubscription<List>? _characteristicSubscription;

bool isCheck = false; // 是否正在检查蓝牙权限
bool isConnect = false; // 是否可以连接
bool isLoad = false; // 是否正在加载

String remoteId = ''; // 已连接蓝牙的唯一标识

String systemLanguage = window.locale.languageCode; // 获取系统语言

void init() async {
Timer.periodic(Duration(milliseconds: 500), (timer) async {
if (isConnect == false) {
await _checkPermissions();
}
connectAndGetMacInfo();
});
}

_checkPermissions() async {
if (isCheck) {
return;
}
isCheck = true;
if (Platform.isAndroid) {
Map<Permission, PermissionStatus> statuses = await [
Permission.bluetoothConnect,
Permission.bluetoothScan,
Permission.locationWhenInUse,
].request();
if (statuses.isEmpty ||
statuses.values.any((status) => status.isDenied)) {
// print('安卓蓝牙权限未打开');
isConnect = false;
} else {
// print('安卓蓝牙权限已打开');
isConnect = true;
}
} else {
Map<Permission, PermissionStatus> statuses = await [
Permission.bluetooth,
Permission.bluetoothConnect,
Permission.bluetoothScan,
Permission.locationWhenInUse,
].request();
if (statuses.values.any((status) => status.isDenied)) {
// print('iOS蓝牙权限未打开');
isConnect = false;
} else {
// print('iOS蓝牙权限已打开');
isConnect = true;
}
}
isCheck = false;
}

connectAndGetMacInfo() async {
if (isConnect == false) return;
if (isLoad) return;
isLoad = true;
try {
_systemDevices = await flutter_blue.FlutterBluePlus.systemDevices;
// print('蓝牙服务 搜索到的系统蓝牙设备: ${_systemDevices.length}个 $_systemDevices');

Problem description: I can obtain system connected Bluetooth devices normally on the Chinese version of Samsung phones or other brands (such as Xiaomi, Vivo, Huawei) of Android phones, but I have been unable to obtain connected Bluetooth devices on the American version of Samsung S20

Logs

null

[chipweinberger]

I dont know the reason.

If you fix it, please tell me.

[chipweinberger]

i think this is a OS or permissions issue