How to draw text in multiple line in multiple pages using static layout for PDF Creation

Question

I am using below code to draw text and write in PDF, but it is not able to draw in multiple pages? What would be the best approach for this problem.

 PdfDocument document = new PdfDocument();
        PdfDocument.PageInfo pageInfo = new
                PdfDocument.PageInfo.Builder(pageWidth, pageheight, 3).create();
        PdfDocument.Page page = document.startPage(pageInfo);
        Canvas canvas = page.getCanvas();


            TextPaint paint=new TextPaint(Paint.ANTI_ALIAS_FLAG);
            paint.setColor(Color.rgb(0, 0, 0));
            paint.setTextSize((int) (7 * 2));
            paint.setShadowLayer(1f, 0f, 1f, Color.WHITE);

            int textWidth = canvas.getWidth() - (int) (16 * 2);

            StaticLayout textLayout = new StaticLayout(
                    edittextContent.getText().toString(), paint, pageWidth-50, Layout.Alignment.ALIGN_NORMAL, 1.0f, 0.0f, false);

            int textHeight = textLayout.getHeight();

            float x = ((pageWidth-15) - textWidth)/2;
            float y = ((pageheight-15) - textHeight)/2;

            // draw text to the Canvas center
            canvas.save();
            canvas.translate(15, 10);
            textLayout.draw(canvas);
            canvas.restore();

        document.finishPage(page);
        document.writeTo(fOut);
        document.close();

Answer 1

I assume you are using native android android.graphics.pdf.PdfDocument. It really looks like it only provides the low-level functionality of placing the text lines at specific coordinates on a specific page. If you want to stick to this API, you would probably need to call startPage() and finishPage() for every page that you want to create in your document and prepare split content for every page. Something like this:

// start 1st page
PdfDocument.Page page = document.startPage(pageInfo);
// draw something on the page
// finish 1st page
document.finishPage(page);

// start 2nd page
PdfDocument.Page page = document.startPage(pageInfo);
// draw something on the page
// finish 2nd page
document.finishPage(page);

...

If you want more high-level functionality which would span multiple pages if content doesn't fit, you would need to use some other tools.

E.g. you can try iText7 library:

PdfDocument pdf = new PdfDocument(new PdfWriter(dest));
Document document = new Document(pdf, new PageSize(pageWidth, pageheight));
// set here any amount of text, it will span across multiple pages if needed
String text = ...;
document.add(new Paragraph(line));
document.close();

See https://kb.itextpdf.com/home/it7kb/ebooks/itext-7-building-blocks/chapter-2-adding-content-to-a-canvas-or-a-document for more examples.