c# - 从Core(Portable)调用放置在Droid项目中的方法

Question

我在一个解决方案中有两个项目。核心和机器人。在 Droid 项目中，我有一个方法需要在异步方法 IN CORE 完成其任务时调用。我在 Core 中的代码是:

        public async Task<bool> UsersAuthenTask(string email, string password, Action<Intent> startActivityDroid, Intent intent)
    {
        var httpClient = GetHttpClient(email, password);

        //var response = await httpClient.GetAsync(UsersAuth.ClientsApiBaseUri + email + "password="+password).ConfigureAwait(false);
        var response = await httpClient.GetAsync(UsersAuth.ClientsApiBaseUri).ConfigureAwait(false);

        if (response.IsSuccessStatusCode)
        {
            startActivityDroid(intent);
        }
        else
        {
            //I NEED TO START METHOD FROM DROID HERE
        }

        return false;
    }

我需要调用 Droid 中的方法“AuthorizationFailed”:

            login.Click += delegate 
        {
            activityIndicator.Visibility = Android.Views.ViewStates.Visible;
            new UsersAuthentication().UsersAuthenTask(email.Text,password.Text, StartActivity, new Intent(this, typeof(IndMassActivity)));
        };
    }

    public void AuthorizationFailed()
    {
        Toast.MakeText(this, "Authorization failed", ToastLength.Short).Show();
    }

Answer 1

由于您的身份验证任务是异步的，因此您需要做的就是等待结果，如果结果为假，则调用失败的消息。您需要修改 UsersAuthenTask 以针对每种情况适本地返回 true/false。

    login.Click += async delegate 
    {
        activityIndicator.Visibility = Android.Views.ViewStates.Visible;

        var auth = new UsersAuthentication();
        var result = await auth.UsersAuthenTask(email.Text,password.Text, StartActivity, new Intent(this, typeof(IndMassActivity)));

        if (!result) {
          AuthorizationFailed();
        }
    };