SaveToGalery

SaveToGalery

.

SaveToGaleryDroid

public async Task<bool> SaveImageAsync(byte[] data, string filename, string folder = null)
{
	try
	{
		File picturesDirectory = Environment.GetExternalStoragePublicDirectory(Environment.DirectoryPictures);
		File folderDirectory;

		if (await Permissions.RequestAsync<Permissions.StorageWrite>() != PermissionStatus.Granted)
			return false;

		if (!string.IsNullOrEmpty(folder))
		{
			folderDirectory = new File(picturesDirectory, folder);
			folderDirectory.Mkdirs();
		}
		else
			folderDirectory = picturesDirectory;

		using (File bitmapFile = new File(folderDirectory, filename))
		{
			bitmapFile.CreateNewFile();

			using (FileOutputStream outputStream = new FileOutputStream(bitmapFile))
			await outputStream.WriteAsync(data);

			MediaScannerConnection.ScanFile(Platform.CurrentActivity,
				new string[] { bitmapFile.Path },
				new string[] { "image/png", "image/jpeg" }, null);
		}
	}
	catch
	{
		return false;
	}
	return true;
}

SaveToGaleryIOS

public Task<bool> SaveImageAsync(byte[] data, string filename, string folder = null)
{
  NSData nsData = NSData.FromArray(data);
  UIImage image = new UIImage(nsData);
  TaskCompletionSource<bool> taskCompletionSource = new TaskCompletionSource<bool>();
  image.SaveToPhotosAlbum((UIImage img, NSError error) => taskCompletionSource.SetResult(error == null));
  return taskCompletionSource.Task;
}