how to refresh pdf page after add text

Hi Redaeepdf team,

I am trying to add text in pdf but I can't see the text at the same time. Until not scroll so how can I view the text while i add text.

Thanks,

Hi,
I suggest you to use : or

For more info check this:

thanks davide for your reply i tried above method but its not working the changes are not reflecting at screen

please view my source code and let me know what should i do?

PageContent content = new PageContent();
content.Create();//create content, do not forget.
content.GSSave();
Matrix mat = new Matrix( 1, 1, 100, 500 );
content.GSSetMatrix(mat);
mat.Destroy();

Page page = doc.GetPage(currentpage_num);


Document.DocFont dfont = doc.NewFontCID("DroidSansFallback", 1 | ;//bold and embed in horizontal writing
ResFont rfont = page.AddResFont(dfont);

content.TextBegin();
content.TextSetFont(rfont, 20);//set font and size
content.SetFillColor(0xff9801);
content.SetStrokeColor(0x10);
content.TextSetCharSpace(0);
content.TextSetWordSpace(0.3f);
content.TextSetLeading(20);
content.TextSetRenderMode(2);//fill and stroke
content.TextSetHScale(120);//set horizontal scale
content.DrawText(getDate());
content.TextEnd();
content.GSRestore();

//add content to page
page.AddContent(content, true);
content.Destroy();
PDFView pdf= new PDFView(getApplicationContext());


PDFVPage pdfd= new PDFVPage(doc,currentpage_num);
pdf.vRenderAsync(pdfd);

u shall do like:

Hi radaee, i tried your suggested code but i could nod find any open method in PDFView class. pdf.open(doc,...) does not works . however its content public void vOpen(Document doc, int page_gap, int back_color, PDFViewListener listener) i tried with this method too but no luck

one more thing invalidate() method is undefined in activity .please suggest any working code thanks

sorry, may some misunderstood.
PDFView is not View class, but PDFReader extends from android.View.
ot better explan this, show sample codes in PDFReader class: