import com.itextpdf.text.Document;
import com.itextpdf.text.DocumentException;
import com.itextpdf.text.PageSize;
import com.itextpdf.text.Paragraph;
import com.itextpdf.text.pdf.PdfWriter;

private void criandoPdf() {

    try {

         String filename = "teste.pdf";

        document = new Document(PageSize.A4);

        String path = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOCUMENTS) + "/MeuPdf";

        File dir = new File(path, filename);
        if (!dir.exists()) {
            dir.getParentFile().mkdirs();
        }

        FileOutputStream fOut = new FileOutputStream(dir);
        fOut.flush();

        PdfWriter.getInstance(document, fOut);
        document.open();
        document.add(new Paragraph("Aqui esta meu pdf"));


    } catch (DocumentException e) {
        e.printStackTrace();
    } catch (FileNotFoundException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    } finally {
        document.close();
    }

}