如何使用Android原生PdfDocument API创建景观PDF？

Question

I am using PdfDocument API to write a PDF from View using Android

Problem

If am writing PDF of A4 size. How can i make in landscape mode?

Thanks in Advance.

Answer 1

A typical use of the Android PDF APIs looks like this:

// create a new document
PdfDocument document = new PdfDocument();

// crate a page description
PageInfo pageInfo = new PageInfo.Builder(300, 300, 1).create();

// start a page
Page page = document.startPage(pageInfo);

// draw something on the page
View content = getContentView();
content.draw(page.getCanvas());

// finish the page
document.finishPage(page);
. . .
// add more pages
. . .
// write the document content
document.writeTo(getOutputStream());

// close the document
document.close();

According to the developer.android.com reference :

 public PdfDocument.PageInfo.Builder (int pageWidth, int pageHeight, int pageNumber) 

_{Added in API level 19}

Creates a new builder with the mandatory page info attributes.

Parameters

pageWidth The page width in PostScript (1/72th of an inch).

pageHeight The page height in PostScript (1/72th of an inch).

pageNumber The page number.

To create a PDF with portrait A4 pages, therefore, you can define the page descriptions like this:

PageInfo pageInfo = new PageInfo.Builder(595, 842, 1).create();

and for a PDF with landscape A4 pages, you can define them like this:

PageInfo pageInfo = new PageInfo.Builder(842, 595, 1).create();