I need to convert the iTextPDF image instance to bitmap in order to set that bitmap to imageView in android.(Not android Image instance to bitmap.) Please checkout the question twice.
    Image instance = Image.getInstance(page);
    // Here i need to convert image instance to bitmap object inorder to set it to imageView
    imageView.setImageBitmap(??);
Convert PDF to image using iTextPDF: and set that image to imageView
public void readAndViewPDF(String fileUri) {
    String INPUTFILE = "c:/temp/FirstPdf.pdf";
    String OUTPUTFILE = "c:/temp/ReadPdf.pdf";
    Document document = new Document();
    PdfWriter writer = null;
    try {
        writer = PdfWriter.getInstance(document,
                new FileOutputStream(OUTPUTFILE));
        document.open();
        PdfReader reader = new PdfReader(fileUri);
        int n = reader.getNumberOfPages();
        PdfImportedPage page;
        // Go through all pages
        for (int i = 1; i <= n; i++) {
            // Only page number 2 will be included
            if (i == 2) {
                page = writer.getImportedPage(reader, i);
                Image instance = Image.getInstance(page);
                imageView.setImageBitmap(instance);
                // Here i need to convert image instance to bitmap object inorder to set it to imageView. here you can show image on your phone
                imageView.setImageBitmap(??);
            }
        }
    } catch (DocumentException e) {
        e.printStackTrace();
    } catch (FileNotFoundException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    } finally {
        document.close();
    }
}