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Android / Guides / Create a thumbnail


PDFTron is now Apryse, learn more here.

Generate PDF page thumbnails in 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:

pdfViewCtrl.addThumbAsyncListener(new PDFViewCtrl.ThumbAsyncListener() {
    public void onThumbReceived(int page, int[] buf, int width, int height) {
        try {
            Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
            bitmap.setPixels(buf, 0, width, 0, 0, width, height);
            // use the bitmap 
        } catch (OutOfMemoryError oom) {
            // error

// request thumbnail for page 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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