Start an Android activity in Xamarin Forms?

user_5920187 0
Viewed 12011

I am trying to view a hosted PDF file with the default Android pdf viewer in my App with the following code

            var intent = new Intent(Intent.ActionView);

            intent.SetDataAndType(Uri.Parse("http://sample/url.pdf"), "application/pdf");
            intent.SetFlags(ActivityFlags.ClearTop);
            Android.Content.Context.StartActivity(intent);

I have used this code in a Native project, so I know that it works within an Android activity. For Xamarin Forms, is there a way for me to start an Android activity from a content page, and vice versa?

xamarin.forms xamarin.android
3 Answers

Forms.Context is obsolete now. The workaround is to instantiate the current context in Main activity class of Android project as under: 

public class MainActivity : global::Xamarin.Forms.Platform.Android.FormsAppCompatActivity 
{
  public static Xamarin.Forms.Platform.Android.FormsAppCompatActivity Instance { get; private set; }

  protected override void OnCreate(Bundle bundle)
  {
        base.OnCreate(savedInstanceState);

        Xamarin.Essentials.Platform.Init(this, savedInstanceState);
        global::Xamarin.Forms.Forms.Init(this, savedInstanceState);

        LoadApplication(new App());
        Instance = this;
  }

And retrieve the local context in your NativePages StartAc() method as under:

public void StartAc()
    {
      var intent = new Intent(MainActivity.Instance, typeof(YourActivity));
      MainActivity.Instance.StartActivity(intent);
    }
user_123792800
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