여러 장의 jpg를 PDF로 만들기

여러장의 이미지를 가지고 PDF를 만듬

1. itextpdf 라이브러리 추가

implementation 'com.itextpdf:itextg:5.5.9'                                                    //Bitmap to PDF

2.해당 파일들 리스트

//PDF만들기 테스트
private void goCreatePDF(){
    GomsLog.d(TAG,"goCreatePDF()");
    List<String> list = new ArrayList<String>();
    list.add("cardmaker_1523253267458.jpg");
    list.add("cardmaker_1523007611218.jpg");
    list.add("cardmaker_1522906251381.jpg");
    list.add("cardmaker_1521363256449.jpg");
    list.add("cardmaker_1522118677235.jpg");
    list.add("cardmaker_1521361016214.jpg");
    list.add("cardmaker_1521190298381.jpg");

    new CreatePdfTask(mMainActivity, list).execute();
}

3.itextpdf 라이브러리를 활용한 pdf 만들기

String fullFolder = Environment.getExternalStorageDirectory().getAbsolutePath() + mFolder;
mPath = fullFolder + "/" + mFilename + ".pdf";
Document document = new Document(PageSize.A4, 38, 38, 50, 38);
Rectangle documentRect = document.getPageSize();
try {
    PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream(mPath));
    document.open();
    for (int i = 0; i < mImagesUri.size(); i++) {

        Bitmap bmp = BitmapFactory.decodeFile(fullFolder + "/" + mImagesUri.get(i));
        ByteArrayOutputStream stream = new ByteArrayOutputStream();
        bmp.compress(Bitmap.CompressFormat.PNG, 100, stream);

        image = Image.getInstance(fullFolder + "/" + mImagesUri.get(i));

        if (bmp.getWidth() > documentRect.getWidth() || bmp.getHeight() > documentRect.getHeight()) {
            //bitmap is larger than page,so set bitmap's size similar to the whole page
            image.scaleAbsolute(documentRect.getWidth(), documentRect.getHeight());
        } else {
            //bitmap is smaller than page, so add bitmap simply.
            //[note: if you want to fill page by stretching image,
            // you may set size similar to page as above]
            image.scaleAbsolute(bmp.getWidth(), bmp.getHeight());
        }


        image.setAbsolutePosition(
                (documentRect.getWidth() - image.getScaledWidth()) / 2,
                (documentRect.getHeight() - image.getScaledHeight()) / 2);

        image.setBorder(Image.BOX);

        image.setBorderWidth(15);

        document.add(image);

        document.newPage();
    }

    document.close();
} catch (Exception e) {
    e.printStackTrace();
}

document.close();

오늘도 즐거운 코딩되세요