如何使用 Xamarin 窗体中的按钮打开手机上安装的 Slack 应用程序



我需要通过Xamarin Forms中创建的按钮打开安装在手机上的Slack应用程序。我拥有的是在共享项目中创建的界面和"主页"中按钮的单击事件。后来我在project.android中创建了一个类,该类进行依赖注入以创建一个实现,以通过"意图"打开特定应用程序

/////Interface
namespace PracticaXamarin
{
   public interface IOpenAppService
   {
     Task<bool> Launch(string stringUri);
   }
}

/////Event click of the button on MainPage
namespace PracticaXamarin
{
   public partial class MainPage : ContentPage
   {
       void Handle_Clicked(object sender, System.EventArgs e)
       {
           DependencyService.Get<IOpenAppService>().Launch("slack");
           //DependencyService.Get<IOpenAppService> ().Launch("com.whatsapp");
       }
       public MainPage()
       {
           InitializeComponent();
       }
   }
}
/////The class created in the project.android
[assembly: Xamarin.Forms.Dependency(typeof(OpenAppService))]
namespace PracticaXamarin.Droid
{
   public class OpenAppService : Activity, IOpenAppService
   {
       public Task<bool> Launch(string stringUri)
       {
           try
           { 
               Intent intent = Android.App.Application.Context.PackageManager.GetLaunchIntentForPackage(stringUri);

               if (intent != null)
               {
                   intent.AddFlags(ActivityFlags.NewTask);
                   Forms.Context.StartActivity(intent);
               }
               else
               {
                   intent = new Intent(Intent.ActionView);
                   intent.AddFlags(ActivityFlags.NewTask);
intent.SetData(Android.Net.Uri.Parse("market://details?id=" + stringUri)); // This launches the PlayStore and search for the app if it's not installed on your device
                   Forms.Context.StartActivity(intent);
               }
               return Task.FromResult(true);
           }
           catch{
               return Task.FromResult(false);
           }
       }
   }
}

我能做的是传递一些应用程序的"意图",例如WhatSapp的"意图",如注释行所示,这将打开WhatSapp应用程序

//DependencyService.Get<IOpenAppService>().Launch("com.whatsapp");

但是我找不到打开Slack应用程序的方法。Slack 是否有任何我"意图"?

可以通过 Xamarin.Essentials NuGet 包使用 Slack "深层链接",并跳过依赖项服务:

await Xamarin.Essentials.Launcher.OpenAsync("slack://open");

用法示例:

if (await Xamarin.Essentials.Launcher.CanOpenAsync("slack://"))
{
    await Xamarin.Essentials.Launcher.OpenAsync("slack://open");
}
else
{
    // Load the Store page for the Stack App... or you could just open the device's browser to https://slack.com....
    if (Xamarin.Essentials.DeviceInfo.Platform == Xamarin.Essentials.DevicePlatform.iOS)
        await Xamarin.Essentials.Browser.OpenAsync("https://itunes.apple.com/app/slack-app/id618783545?ls=1&mt=8");
    else if (Xamarin.Essentials.DeviceInfo.Platform == Xamarin.Essentials.DevicePlatform.Android)
        await Xamarin.Essentials.Browser.OpenAsync("https://play.google.com/store/apps/details?id=com.Slack&hl=en_US");
    else
        Console.WriteLine("Something else..? Launch the device browser? ....");
}

回复:https://api.slack.com/docs/deep-linking(向下跳至"深度链接 slack://"部分(

使用 Slack 的自定义 uri 方案

Device.OpenUri(new Uri("slack://open"));

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