Add watermarks to PDF in Android

The WatermarkDialog allows you to stamp a PDF document with text that overlays each page of the document.

The watermark editor can be shown from an activity by calling the following method:

public void showWatermarkDialog(PDFViewCtrl pdfViewCtrl, FragmentManager fragmentManager) {
    WatermarkDialog fragment = WatermarkDialog.newInstance(pdfViewCtrl);
    fragment.show(fragmentManager);
}