/// <summary>
/// Create Notification Channel when API >= 26.
/// </summary>
/// <param name="request"></param>
public static bool CreateNotificationChannel(NotificationChannelRequest request = null)
{
if (Build.VERSION.SdkInt < BuildVersionCodes.O)
{
return(false);
}
if (Application.Context.GetSystemService(Context.NotificationService) is not NotificationManager
notificationManager)
{
return(false);
}
request ??= new NotificationChannelRequest();
if (string.IsNullOrWhiteSpace(request.Name))
{
request.Name = "General";
}
if (string.IsNullOrWhiteSpace(request.Id))
{
request.Id = DefaultChannelId;
}
// you can't change the importance or other notification behaviors after this.
// once you create the channel, you cannot change these settings and
// the user has final control of whether these behaviors are active.
using var channel = new NotificationChannel(request.Id, request.Name, request.Importance)
{
Description = request.Description,
Group = request.Group,
LightColor = request.LightColor,
LockscreenVisibility = request.LockScreenVisibility,
};
var soundUri = GetSoundUri(request.Sound);
if (soundUri != null)
{
using var audioAttributesBuilder = new AudioAttributes.Builder();
var audioAttributes = audioAttributesBuilder.SetUsage(AudioUsageKind.Notification)
?.SetContentType(AudioContentType.Music)
?.Build();
channel.SetSound(soundUri, audioAttributes);
}
if (request.VibrationPattern != null)
{
channel.SetVibrationPattern(request.VibrationPattern);
}
channel.SetShowBadge(request.ShowBadge);
channel.EnableLights(request.EnableLights);
channel.EnableVibration(request.EnableVibration);
channel.SetBypassDnd(request.CanBypassDnd);
notificationManager.CreateNotificationChannel(channel);
return(true);
}
protected override void OnCreate(Bundle savedInstanceState)
{
TabLayoutResource = Resource.Layout.Tabbar;
ToolbarResource = Resource.Layout.Toolbar;
//Forms.SetFlags(new[]
//{
// "CarouselView_Experimental",
// "IndicatorView_Experimental",
// "SwipeView_Experimental",
// "CollectionView_Experimental"
//});
base.OnCreate(savedInstanceState);
Xamarin.Essentials.Platform.Init(this, savedInstanceState);
global::Xamarin.Forms.Forms.Init(this, savedInstanceState);
FFImageLoading.Forms.Platform.CachedImageRenderer.Init(true);
var channel = new NotificationChannelRequest();
channel.LightColor = Android.Graphics.Color.Green;
long[] vibrationPattern = { 100, 200, 300, 400, 500, 400, 300, 200, 400 };
channel.VibrationPattern = vibrationPattern;
channel.LockscreenVisibility = NotificationVisibility.Public;
// Must create a Notification Channel when API >= 26
NotificationCenter.CreateNotificationChannel(channel);
// you can created multiple Notification Channels with different names.
NotificationCenter.CreateNotificationChannel();
//For apps that target Android 5.1(API level 22) or lower, there is nothing more that needs to be done.
//Apps that will run on Android 6.0(API 23 level 23) or higher should ask Run time permission checks.
//Handles this Exception: Xamarin: Android: System.UnauthorizedAccessException: Access to the path is denied
if (Build.VERSION.SdkInt >= BuildVersionCodes.M)
{
if (!(CheckPermissionGranted(Manifest.Permission.ReadExternalStorage) && !CheckPermissionGranted(Manifest.Permission.WriteExternalStorage)))
{
RequestPermission();
}
}
LoadApplication(new App());
NotificationCenter.NotifyNotificationTapped(base.Intent);
}
