Android - Drawing to a PDF canvas from WebView

Question

I\'ve been having troubles getting PDF printing work on Android. What I\'m trying to do is render some HTML in WebView, then draw the WebView contents on a PDF canvas and fi

Answer 1

I had the same problem.

I solved it using very simple trick.

Just set MediaSize to PrintAttributes.MediaSize.ISO_A1.

The downside of this solution is the pdf size: even one-page-pdf with simple text has roughly 5MB.

Working snippet of code (generates a pdf from a view and export it to a file):

@TargetApi(19)
private void generatePdf() {
    PrintAttributes.Builder builder = new PrintAttributes.Builder();
    builder.setColorMode(PrintAttributes.COLOR_MODE_COLOR);
    builder.setMediaSize(PrintAttributes.MediaSize.ISO_A1); // or ISO_A0
    builder.setMinMargins(PrintAttributes.Margins.NO_MARGINS);
    builder.setResolution(new PrintAttributes.Resolution("1", "label", 300, 300));
    PrintedPdfDocument document = new PrintedPdfDocument(this, builder.build());
    PdfDocument.Page page = document.startPage(1);
    View content = yourView;
    content.draw(page.getCanvas());
    document.finishPage(page);
    try {
        File file = new File(getExternalFilesDir(null).getAbsolutePath(), "document.pdf");
        document.writeTo(new FileOutputStream(file));
    } catch (IOException e) {
        Log.e("cannot generate pdf", e);
    }
    document.close();
}