.NET Maui多权限（含蓝牙）便捷检查与请求方案求助

一、封装通用权限处理工具类（解决代码冗余问题） #

把重复的权限检查+请求逻辑封装成通用方法，不管是Maui内置权限还是自定义权限都能复用：

public static class PermissionHelper
{
    // 单个权限的检查与请求
    public static async Task<PermissionStatus> CheckAndRequestPermissionAsync<T>() 
        where T : Permissions.BasePermission, new()
    {
        var status = await Permissions.CheckStatusAsync<T>();
        if (status != PermissionStatus.Granted)
        {
            status = await Permissions.RequestAsync<T>();
        }
        return status;
    }

    // 批量处理多个权限
    public static async Task<Dictionary<Type, PermissionStatus>> CheckAndRequestMultiplePermissionsAsync(params Type[] permissionTypes)
    {
        var results = new Dictionary<Type, PermissionStatus>();
        foreach (var type in permissionTypes)
        {
            if (typeof(Permissions.BasePermission).IsAssignableFrom(type))
            {
                var permission = (Permissions.BasePermission)Activator.CreateInstance(type);
                var status = await Permissions.CheckStatusAsync(permission);
                if (status != PermissionStatus.Granted)
                {
                    status = await Permissions.RequestAsync(permission);
                }
                results.Add(type, status);
            }
        }
        return results;
    }
}

二、自定义Android 13蓝牙权限类（解决Maui无内置支持问题） #

Android 13的蓝牙权限分为BLUETOOTH_SCAN、BLUETOOTH_CONNECT、BLUETOOTH_ADVERTISE三类，需要自定义权限类对接平台权限：

// 蓝牙扫描权限
public class BluetoothScanPermission : Permissions.BasePlatformPermission
{
    public override (string androidPermission, bool isRuntime)[] RequiredPermissions =>
        new[] { (Android.Manifest.Permission.BluetoothScan, true) };
}

// 蓝牙连接权限
public class BluetoothConnectPermission : Permissions.BasePlatformPermission
{
    public override (string androidPermission, bool isRuntime)[] RequiredPermissions =>
        new[] { (Android.Manifest.Permission.BluetoothConnect, true) };
}

// 蓝牙广播权限（按需添加）
public class BluetoothAdvertisePermission : Permissions.BasePlatformPermission
{
    public override (string androidPermission, bool isRuntime)[] RequiredPermissions =>
        new[] { (Android.Manifest.Permission.BluetoothAdvertise, true) };
}

同时在Android项目的AndroidManifest.xml中添加权限声明：

<uses-permission android:name="android.permission.BLUETOOTH_SCAN" />
<uses-permission android:name="android.permission.BLUETOOTH_CONNECT" />
<!-- 如需广播蓝牙信号，添加以下权限 -->
<uses-permission android:name="android.permission.BLUETOOTH_ADVERTISE" />

三、使用示例 #

单个蓝牙权限处理 #

var scanStatus = await PermissionHelper.CheckAndRequestPermissionAsync<BluetoothScanPermission>();
if (scanStatus == PermissionStatus.Granted)
{
    // 执行蓝牙扫描操作
}

批量处理多权限（含蓝牙+内置权限） #

var permissionResults = await PermissionHelper.CheckAndRequestMultiplePermissionsAsync(
    typeof(BluetoothScanPermission),
    typeof(BluetoothConnectPermission),
    typeof(Permissions.LocationWhenInUse)
);

// 验证蓝牙权限状态
if (permissionResults[typeof(BluetoothScanPermission)] == PermissionStatus.Granted &&
    permissionResults[typeof(BluetoothConnectPermission)] == PermissionStatus.Granted)
{
    // 蓝牙权限已授权，执行相关操作
}

// 验证位置权限状态
if (permissionResults[typeof(Permissions.LocationWhenInUse)] == PermissionStatus.Granted)
{
    // 位置权限已授权
}

注意事项 #

• Android 13中蓝牙权限属于运行时权限，必须动态申请，仅靠Manifest声明无效。
• 若需扫描蓝牙设备并获取设备名称，除BLUETOOTH_SCAN外，可能还需ACCESS_FINE_LOCATION权限，可直接使用Maui内置的Permissions.LocationWhenInUse。
• 建议按功能分组申请权限，避免一次性弹出过多授权请求，提升用户体验。

内容的提问来源于stack exchange，提问作者computercarguy