我目前有此函数返回一个Uint8List。我想在我的android应用中将其渲染为pdf,以便可以看到它。不确定如何执行此操作,感谢您的帮助!如果这也有帮助的话,这就是源代码。谢谢https://github.com/DavBfr/dart_pdf/blob/master/demo/lib/invoice.dart
Future<Uint8List> generateInvoice(PdfPageFormat pageFormat) async {
final lorem = pw.LoremText();
final products = <Product>[
Product('19874', lorem.sentence(4), 3.99, 2),
Product('98452', lorem.sentence(6), 15, 2),
Product('28375', lorem.sentence(4), 6.95, 3),
Product('95673', lorem.sentence(3), 49.99, 4),
Product('23763', lorem.sentence(2), 560.03, 1),
Product('55209', lorem.sentence(5), 26, 1),
Product('09853', lorem.sentence(5), 26, 1),
];
final invoice = Invoice(
invoiceNumber: '982347',
products: products,
customerName: 'Abraham Swearegin',
customerAddress: '54 rue de Rivoli\n75001 Paris, France',
paymentInfo:
'4509 Wiseman Street\nKnoxville, Tennessee(TN), 37929\n865-372-0425',
tax: .15,
baseColor: PdfColors.teal,
accentColor: PdfColors.blueGrey900,
);
return await invoice.buildPdf(pageFormat);
}
class Invoice {
Invoice({
this.products,
this.customerName,
this.customerAddress,
this.invoiceNumber,
this.tax,
this.paymentInfo,
this.baseColor,
this.accentColor,
});
final List<Product> products;
final String customerName;
final String customerAddress;
final String invoiceNumber;
static const _darkColor = PdfColors.blueGrey800;
static const _lightColor = PdfColors.white;
PdfColor get _baseTextColor =>
baseColor.luminance < 0.5 ? _lightColor : _darkColor;
PdfColor get _accentTextColor =>
baseColor.luminance < 0.5 ? _lightColor : _darkColor;
double get _total =>
products.map<double>((p) => p.total).reduce((a, b) => a + b);
double get _grandTotal => _total * (1 + tax);
PdfImage _logo;
Future<Uint8List> buildPdf(PdfPageFormat pageFormat) async {
// Create a PDF document.
final doc = pw.Document();
final font1 = await rootBundle.load('assets/roboto1.ttf');
final font2 = await rootBundle.load('assets/roboto2.ttf');
final font3 = await rootBundle.load('assets/roboto3.ttf');
_logo = PdfImage.file(
doc.document,
bytes: (await rootBundle.load('assets/logo.png')).buffer.asUint8List(),
);
// Add page to the PDF
doc.addPage(
pw.MultiPage(
pageTheme: _buildTheme(
pageFormat,
font1 != null ? pw.Font.ttf(font1) : null,
font2 != null ? pw.Font.ttf(font2) : null,
font3 != null ? pw.Font.ttf(font3) : null,
),
header: _buildHeader,
footer: _buildFooter,
build: (context) => [
_contentHeader(context),
_contentTable(context),
pw.SizedBox(height: 20),
_contentFooter(context),
pw.SizedBox(height: 20),
_termsAndConditions(context),
],
),
);
// Return the PDF file content
return doc.save();
}
您可以将文件保存在本地并使用某些pdf查看器进行渲染
final String dir = (await getApplicationDocumentsDirectory()).path;
final String path = '$dir/example.pdf';
final File file = File(path);
await file.writeAsBytes(doc.save());
现在,您可以使用此路径通过pdf查看器查看pdf。
您可以查看此中等职位以供参考。
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我来说两句