Knowledge Base and examples

Knowledge Base - How to add an Ink signature to a pdf.

This article shows how to add an Ink signature over a signature annot.

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First of all you have to check the annot type and then launch your activity/view that handles signature capture using Ink features:

if(m_annot != null && m_annot.GetFieldType() == 4){
//save annot position, here will be placed the annot with the sign
yourPosition = m_annot.GetRect();
//handle annot
startActivityForResult(new Intent(PDFReaderAct.this, CaptureSignatureActivity.class), SIGNATURE_ACTIVITY);

You have to save the signature into a Bitmap (yourSignatureBitmap)

Then, when you have captured and saved the signature, add it to the pdf : 

protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == SIGNATURE_ACTIVITY) {
if (resultCode == RESULT_OK) {
if (data.getStringExtra("status").equalsIgnoreCase("done")) {
Page currentPage = m_doc.GetPage(yourSignPage);

String file_cache = Global.tmp_path + "/temp.dat";
m_doc.SetCache(file_cache); //set temporary cache for editing.

//add annot
if (currentPage.AddAnnotBitmap(yourSignatureBitmap, true, yourPosition))
//lock the annot (if necessary)
currentPage.GetAnnot(currentPage.GetAnnotCount() - 1).SetLocked(true);

// scale + refresh pagina
Applies To

RadaeePDF SDK for Android


Created : 2016-04-13 17:32:38, Last Modified : 2016-04-14 10:36:14