Android : set bitmap in new pdf -

i want add few bitmaps in new pdf.

i tried :

    document doc = new document();     page page = doc.getpages().add();     page.getparagraphs().add(img);     doc.save(environment.getexternalstoragedirectory().getabsolutepath()+"/doc.pdf"); 

but i've few error, document isn't found, tried import android proposed me, nothings work. how work ? how can add few bitmap in pdf ?

thx,