| DocumentListener | Listeners for document events on the the PdfFragment. |
| DocumentSigningListener | Listener for digital signing events when using the SignatureSignerDialog. |
| LocalizationListener | Listener that allows SDK UI strings to be localized programmatically. |
| OnDocumentLongPressListener | Listener for document long press events on the the PdfFragment. |
| OnPreparePopupToolbarListener | Listener for getting notified of when the popup toolbar is being prepared to be displayed. |
| OnVisibilityChangedListener | Listener for receiving visibility changes of PSPDFKit views. |
| PdfActivityListener | This listener allows PdfActivity to receive document events. |
| DefaultLocalizationListener | Default implementation of a LocalizationListener which just calls through to default Android
localization methods in android.content.res.Resources class and picks up strings from XML files. |
| OnVisibilityChangedListenerManager | Collection of multiple OnVisibilityChangedListener objects. |
| SimpleDocumentListener | Empty implementation of the DocumentListener interface. |