Question

在Android中创建PDF，但只创建一个页面而我的其他数据都看不到。如何在android.any的想法或建议中自动增加PDF页面运行时。我的问题是如何从该Graphics对象创建具有多个页面的PDF

Answer 1

在android中创建PDF，多页使用此库

将此gradle文件放入应用build.gradle文件中 - compile＆＃39; com.itextpdf：itext-pdfa：5.5.8＆＃39;

使用此代码生成包含多个页面的pdf

tempArrayList - 文件路径数组。

pdfName - pdf名称，如您所愿。

generatePDF(String pdf_name) {

  String pdfName= null;
  Dialog  dialog = new MaterialDialog.Builder(activity)
        .backgroundColor(Color.WHITE).contentColor(Color.BLACK).title(getString(R.string.app_name)).titleColor(Color.BLACK)
        .content("Generating pdf...").progress(true, 0)
        .show();

 dialog.setCancelable(false);

  pdfName = new SimpleDateFormat("yyyyMMdd_HHmmss").format(System.currentTimeMillis()) + ".pdf";

File myPath = new File(AppConstant.Pdf_Directory, pdfName);
if (myPath.exists()) {
    myPath.delete();
}

Document document = new Document(PageSize.A4); // create the document

try {
    PdfWriter.getInstance(document, new FileOutputStream(myPath));
} catch (Exception e) {
}

// open document
document.open();

for (int i = 0; i < tempArrayList.size(); i++) {

    Bitmap bmp = null;
    try {
        bmp = BitmapFactory.decodeFile(tempArrayList.get(i));
        ByteArrayOutputStream stream = new ByteArrayOutputStream();
        bmp.compress(Bitmap.CompressFormat.PNG, 90, stream);
        Image image = Image.getInstance(stream.toByteArray());

        if (image.getWidth() >= document.getPageSize().getWidth() || image.getHeight() >= document.getPageSize().getHeight()) {
            image.scaleToFit(document.getPageSize());
        }

        image.setAbsolutePosition((document.getPageSize().getWidth() - image.getScaledWidth()) / BaseField.BORDER_WIDTH_MEDIUM, (document.getPageSize().getHeight() - image.getScaledHeight()) / BaseField.BORDER_WIDTH_MEDIUM);
        document.add(image);
        document.newPage();

    } catch (Exception ex) {
        ex.printStackTrace();
        Toast.makeText(activity, "Fail to generate pdf.", Toast.LENGTH_SHORT).show();
    }
    if (bmp != null) {
        bmp.recycle();
    }
}
// close the document
document.close();

Toast.makeText(activity, "Pdf generate successfully.", Toast.LENGTH_SHORT).show();
System.out.println(" pdf generate ");

dialog.dismiss();

}

PDF多页面不能在android中创建

1 个答案: