TOPIC:

public void graphicannotation(Bitmap bitmap)
{
Bitmap bitmap = BitmapFactory.decodeResource(this.getResources(), R.drawable.pdf_icon);
m_doc.SetCache(Global.tmp_path + "/temp.dat");
int c_page = Constant.currentpage;
pa = m_doc.GetPage(c_page);
pa.ObjsStart();
PDFVPage vpage = m_rPDF.m_view.vGetPage(c_page);
float[] rect = { 200, 200, (200 + bitmap.getWidth()),
(200 + bitmap.getHeight()) };
pa.AddAnnotBitmap(bitmap, true, rect);
m_rPDF.m_view.vRenderSync(vpage);

bitmap.recycle();

pa.Close();
m_rPDF.PDFSave(); //after save you should reopen the document, reget the page
}