Show and hide existing annotations in Android

By default, PDFViewCtrl shows all annotations on PDF document. If you want to hide a particular annotation on PDFViewCtrl, or hide all annotations on PDFViewCtrl, you can hide annotations as follows:

To show a hidden annotation in PDFViewCtrl, call showAnnotation(Annot):

public static void showAnnotation(PDFViewCtrl pdfViewCtrl, Annot annot, int annotPageNum) {
  pdfViewCtrl.showAnnotation(annot);
  pdfViewCtrl.update(annot, annotPageNum);
}

To hide an annotation in PDFViewCtrl, call hideAnnotation(Annot).

public static void hideAnnotation(PDFViewCtrl pdfViewCtrl, Annot annot, int annotPageNum) {
  pdfViewCtrl.hideAnnotation(annot);
  pdfViewCtrl.update(annot, annotPageNum);
}

Alternatively, you can show/hide all annotations in PDFViewCtrl by calling setDrawAnnotations(boolean). This method toggles the visibility of annotations and form fields.

For example, disabling all annotations and form fields from rendering:

try {
    pdfViewCtrl.setDrawAnnotations(false);
    pdfViewCtrl.update(true);
} catch (PDFNetException e) {
    e.printStackTrace();
}