android - 统一 + 安卓 : How to ask for multiple permissions?

Question

我正在使用目标平台 Android 开发一个 Unity(版本 2019.1.11)项目，我需要拥有以下权限才能使我的应用运行:

android.permission.CAMERA
android.permission.RECORD_AUDIO
android.permission.WRITE_EXTERNAL_STORAGE
android.permission.READ_PHONE_STATE

Unity 文档指定 this请求Android权限的方式。我的目标是在应用程序启动期间对所有必需的权限进行初步检查，如下所示:

private void AskPermissions()
{
#if UNITY_ANDROID
    if (!Permission.HasUserAuthorizedPermission(Permission.Microphone))
    {
        Permission.RequestUserPermission(Permission.Microphone);
    }
    if (!Permission.HasUserAuthorizedPermission(Permission.Camera))
    {
        Permission.RequestUserPermission(Permission.Camera);
    }
    if (!Permission.HasUserAuthorizedPermission(Permission.ExternalStorageWrite))
    {
        Permission.RequestUserPermission(Permission.ExternalStorageWrite);
    }
    if (!Permission.HasUserAuthorizedPermission("android.permission.READ_PHONE_STATE"))
    {
        Permission.RequestUserPermission("android.permission.READ_PHONE_STATE");
    }
#endif
}

但是，这不起作用:该应用程序仅显示第一个未授权权限的对话框，而不显示之后正在检查的未授权权限的对话框。

如何确保始终检查所有权限？

Answer 1

似乎 Permission.RequestUserPermission 以某种方式异步工作，并且在已经显示对话框时不会显示对话框 - 因此在找到第一个未授权权限后简单地跳过所有其他权限。
我可以绕过这样的问题:

private IEnumerator AskForPermissions()
{
#if UNITY_ANDROID
    List<bool> permissions = new List<bool>() { false, false, false, false };
    List<bool> permissionsAsked = new List<bool>() { false, false, false, false };
    List<Action> actions = new List<Action>()
    {
        new Action(() => {
            permissions[0] = Permission.HasUserAuthorizedPermission(Permission.Microphone);
            if (!permissions[0] && !permissionsAsked[0])
            {
                Permission.RequestUserPermission(Permission.Microphone);
                permissionsAsked[0] = true;
                return;
            }
        }),
        new Action(() => {
            permissions[1] = Permission.HasUserAuthorizedPermission(Permission.Camera);
            if (!permissions[1] && !permissionsAsked[1])
            {
                Permission.RequestUserPermission(Permission.Camera);
                permissionsAsked[1] = true;
                return;
            }
        }),
        new Action(() => {
            permissions[2] = Permission.HasUserAuthorizedPermission(Permission.ExternalStorageWrite);
            if (!permissions[2] && !permissionsAsked[2])
            {
                Permission.RequestUserPermission(Permission.ExternalStorageWrite);
                permissionsAsked[2] = true;
                return;
            }
        }),
        new Action(() => {
            permissions[3] = ermission.HasUserAuthorizedPermission("android.permission.READ_PHONE_STATE");
            if (!permissions[3] && !permissionsAsked[3])
            {
                Permission.RequestUserPermission("android.permission.READ_PHONE_STATE");
                permissionsAsked[3] = true;
                return;
            }
        })
    };
    for(int i = 0; i < permissionsAsked.Count; )
    {
        actions[i].Invoke();
        if(permissions[i])
        {
            ++i;
        }
        yield return new WaitForEndOfFrame();
    }
#endif
}