Section:

Extract FDF data from a PDF in Android

To extract data from PDF to FDF, then export FDF as XFDF

1PDFDoc doc = new PDFDoc(filename);
2
3// Extract annotations to FDF.
4// Optionally use e_both to extract both forms and annotations
5FDFDoc doc_fields = doc.fdfExtract(PDFDoc.e_annots_only); //PDFDoc.e_forms_only
6
7// Export annotations from FDF to XFDF.
8doc_fields.saveAsXFDF(output_xfdf_filename);
9
10// Optionally write XFDF to a string
11String XFDF_string = doc_fields.saveAsXFDF();

Disable annotation auto-save

Annotation updates by default will automatically save to the PDF. Set PdfViewCtrlTabFragment2::setSavingEnabled to false to disable auto-save.

PDF Form Fill and Form Data Extraction
Full sample code which illustrates basic FDF merge/extract functionality and full support for FDF (Forms Data Format)

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