protected override void OnElementChanged(ElementChangedEventArgs <Page> e)
{
base.OnElementChanged(e);
var page = Element as CropView;
if (page != null)
{
var cropImageView = new CropImageView(Context);
cropImageView.LayoutParameters = new LayoutParams(LayoutParams.MatchParent, LayoutParams.MatchParent);
BitmapFactory.Options options = new BitmapFactory.Options();
options.InSampleSize = 2;
Bitmap bitmp = BitmapFactory.DecodeByteArray(page.Image, 0, page.Image.Length, options);
cropImageView.SetImageBitmap(bitmp);
cropImageView.SetMaxCropResultSize(Convert.ToInt32(DeviceDisplay.MainDisplayInfo.Width), Convert.ToInt32(DeviceDisplay.MainDisplayInfo.Height));
cropImageView.SetMinCropResultSize(Convert.ToInt32(DeviceDisplay.MainDisplayInfo.Width) / 4, Convert.ToInt32(DeviceDisplay.MainDisplayInfo.Height) / 4);
cropImageView.SetMinimumHeight(Convert.ToInt32(DeviceDisplay.MainDisplayInfo.Height) / 2);
cropImageView.SetMinimumWidth(Convert.ToInt32(DeviceDisplay.MainDisplayInfo.Width) / 2);
var scrollView = new ScrollView {
Content = cropImageView.ToView()
};
var stackLayout = new StackLayout {
Children = { scrollView }
};
var rotateButton = new Button {
Text = "Rotate"
};
rotateButton.CornerRadius = 50;
rotateButton.Clicked += (sender, ex) =>
{
cropImageView.RotateImage(90);
};
stackLayout.Children.Add(rotateButton);
var finishButton = new Button {
Text = "Finished"
};
finishButton.CornerRadius = 50;
Bitmap decoded = null;
finishButton.Clicked += (sender, ex) =>
{
finishButton.IsEnabled = false;
rotateButton.IsVisible = false;
finishButton.Text = "Please Wait...";
Bitmap cropped = cropImageView.CroppedImage;
using (MemoryStream memory = new MemoryStream())
{
cropped.Compress(Bitmap.CompressFormat.Png, 100, memory);
memory.Position = 0;
decoded = BitmapFactory.DecodeStream(memory);
memory.Flush();
}
WallpaperSet wallpaperSet = new WallpaperSet();
bool val = wallpaperSet.GetWallpaperBysystem(decoded);
page.DidCrop = true;
page.Navigation.PopModalAsync();
};
stackLayout.Children.Add(finishButton);
page.Content = stackLayout;
}
}