Annotation Events and Notifications

override fun onCreate(savedInstanceState : Bundle?) {
    super.onCreate(savedInstanceState)

    pdfFragment.addOnAnnotationSelectedListener(object :AnnotationManager.OnAnnotationSelectedListener {
        override fun onPrepareAnnotationSelection(controller: AnnotationSelectionController, annotation: Annotation, annotationCreated: Boolean): Boolean {
            // Returning `false` here would prevent the annotation from being selected.
            return true
        }

        override fun onAnnotationSelected(annotation: Annotation, annotationCreated: Boolean) {
            Log.i(TAG, "The annotation was selected.")
        }
    })

    pdfFragment.addOnAnnotationDeselectedListener { annotation, reselected ->
        Log.i(TAG, "The annotation was deselected.")
    }

    pdfFragment.addOnAnnotationUpdatedListener(object: OnAnnotationUpdatedListener {
        override fun onAnnotationCreated(annotation: Annotation) {
            Log.i(TAG, "The annotation was created.")
        }

        override fun onAnnotationUpdated(annotation: Annotation) {
            Log.i(TAG, "The annotation was updated.")
        }

        override fun onAnnotationRemoved(annotation: Annotation) {
            Log.i(TAG, "The annotation was removed.")
        }
    })

    // This will remove all previously registered listeners. Instead, you could unregister them selectively.
    pdfFragment.clearAnnotationListeners()
}

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    getPdfFragment().addOnAnnotationSelectedListener(new AnnotationManager.OnAnnotationSelectedListener() {
        @Override
        public boolean onPrepareAnnotationSelection(@NonNull AnnotationSelectionController controller, @NonNull Annotation annotation, boolean annotationCreated) {
            // Returning `false` here would prevent the annotation from being selected.
            return true;
        }

        @Override public void onAnnotationSelected(@NonNull Annotation annotation, boolean annotationCreated) {
            Log.i(TAG, "The annotation was selected");
        }
    });

    getPdfFragment().addOnAnnotationDeselectedListener(new AnnotationManager.OnAnnotationDeselectedListener() {
        @Override public void onAnnotationDeselected(@NonNull Annotation annotation, boolean reselected) {
            Log.i(TAG, "The annotation was deselected");
        }
    });

    getPdfFragment().addOnAnnotationUpdatedListener(new AnnotationProvider.OnAnnotationUpdatedListener() {
        @Override
        public void onAnnotationCreated(@NonNull Annotation annotation) {
            Log.i(TAG, "The annotation was created.");
        }

        @Override
        public void onAnnotationUpdated(@NonNull Annotation annotation) {
            Log.i(TAG, "The annotation was updated.");
        }

        @Override
        public void onAnnotationRemoved(@NonNull Annotation annotation) {
            Log.i(TAG, "The annotation was removed.");
        }
    });

    // This will remove all previously registered listeners. Instead, you could unregister them selectively.
    getPdfFragment().clearAnnotationListeners();
}