Section:

Generate a PDF page thumbnail

You can generate images of pages in documents.

Generate PDF page thumbnails in Xamarin.Android

This tutorial only applies to Xamarin.Android.

Apryse's library provides a page thumbnail dialog which shows thumbnails of all PDF document pages. Fore more information, see thumbnail browser .

With PDFViewCtrl, you can get a thumbnail Bitmap image for each page in a PDF document.

The following example request thumbnail for page 3:

C#

1pdfViewCtrl.ThumbAsync += (sender, e) =>
2{
3    var bitmap = Bitmap.CreateBitmap(e.Width, e.Height, Bitmap.Config.Argb8888);
4    bitmap.SetPixels(e.Buf, 0, e.Width, 0, 0, e.Width, e.Height);
5    // use the bitmap
6};
7
8// request thumbnail for page 3
9pdfViewCtrl.GetThumbAsync(3);

where pdfViewCtrl is an instance of PDFViewCtrl.

It is recommended you cancel all thumbnail requests once they are no longer needed. To cancel all thumbnail request, use PDFViewCtrl.cancelAllThumbRequests().

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