“意图”不包含“ FLAG_ACTIVITY_NEW_TASK”的定义

Question

I have started programming an Xamarin Android App that changes the activity when the alarm goes off. Everywhere online everyone says to use FLAG_ACTIVITY_NEW_TASK or similar flags to call a new activity. For some reason, my Intent does not have any of those flags defined.

[BroadcastReceiver(Enabled = true)]
public class AlarmReceiver : BroadcastReceiver
{
    public override void OnReceive(Context context, Intent intent)
    {
        Toast.MakeText(context, "THIS IS MY ALARM", ToastLength.Long).Show();

        Intent i = new Intent();
        i.SetClassName("AlarmReceiver", "AlarmActivated");
        i.SetFlags(Intent.FLAG_ACTIVITY_NEW_TASK); //error
        context.StartActivity(i);
    }
}

Is there a reason why this flag, or other similar flags are not defined? Thanks.

Answer 1

Xamarin "C# normalizes" the Android/Java methods/properties and at times moves enums/flags into their own "sub" enums, FLAG_ACTIVITY{_XXX} becomes an ActivityFlags enum.

So Intent.FLAG_ACTIVITY_NEW_TASK becomes ActivityFlags.NewTask

Answer 2

i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(i);

In my case addFlags was helped instead of setFlags