Xamarin HttpClient.GetStringAsync在Xamarin.Droid上不起作用 [英] Xamarin HttpClient.GetStringAsync not working on Xamarin.Droid

问题描述

我真的是Xamarin开发的新手，我刚尝试使用Xamarin.Forms开发Android&具有共享代码的iOS App，我在这里要做的是使用Plugin.RestClient NuGet包从API获取数据.

I'm really new in Xamarin development, and I just tried Xamarin.Forms to Develop Android & iOS App with shared Code, and what I'm trying to do here is to get data from API with Plugin.RestClient NuGet package.

这是我的MainViewModel.

Here's my MainViewModel.

public MainViewModel(){
    InitializeDataAsync();
}

public async Task InitializeDataAsync(){
    var employeeServices = new EmployeeServices();
    EmployeesList = await employeeServices.getEmployeesAsync();
}

这是我的服务

public async Task<List<Employee>> getEmployeesAsync(){
    RestClient<Employee> restClient = new RestClient<Employee>();
    var employeeList = await restClient.GetAsync("http://localhost:3000/employee");
    return employeeList;
}

这是我的RestClient

And this is my RestClient

public async Task<List<T>> GetAsync(string WebServiceUrl){
    var httpClient = new HttpClient();
    var json = await httpClient.GetStringAsync(WebServiceUrl);

    Debug.WriteLine(WebServiceUrl);
    Debug.WriteLine(json);

    var taskModels = JsonConvert.DeserializeObject<List<T>>(json);
    return taskModels;
}

该代码在我的iPhone模拟器上正常工作.我可以在Debug中看到url和json响应.但是，在我的Android模拟器上，列表上没有任何内容.我什至找不到针对url和json响应的调试程序，我已经检查了我的应用程序输出和设备日志(我使用Xamarin Studio for Mac顺便说一句).

The code works fine on my iPhone Emulator. I can see my Debug for the url and json response. But on my Android Emulator there's nothing on the list. I can't even find my Debug for url and json response, I already checked my Application Output and my Device Log (I used Xamarin Studio for Mac btw).

我还已经在我的Android清单上添加了互联网许可. 我该怎么办?

I also already add internet permission on my Android Manifest. What should I do?

推荐答案

您只能在本地计算机上访问localhost.您需要将localhost更改为托管api的计算机的IP地址.

You can only access localhost on your local machine. You need to change localhost to the IP address of the machine on which your api is hosted.

因此

http://localhost:3000/employee

应该类似于

http://192.168.0.5:3000/employee

这篇关于Xamarin HttpClient.GetStringAsync在Xamarin.Droid上不起作用的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！