将生成的二维码转换成PDF文件并保存到Android Studio设备中,可以通过以下步骤实现:
import com.google.zxing.BarcodeFormat;
import com.google.zxing.WriterException;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.qrcode.QRCodeWriter;
...
// 生成二维码并设置给ImageView
private void generateQRCode(String content) {
QRCodeWriter qrCodeWriter = new QRCodeWriter();
try {
BitMatrix bitMatrix = qrCodeWriter.encode(content, BarcodeFormat.QR_CODE, 512, 512);
int width = bitMatrix.getWidth();
int height = bitMatrix.getHeight();
Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.RGB_565);
for (int x = 0; x < width; x++) {
for (int y = 0; y < height; y++) {
bitmap.setPixel(x, y, bitMatrix.get(x, y) ? Color.BLACK : Color.WHITE);
}
}
imageView.setImageBitmap(bitmap);
} catch (WriterException e) {
e.printStackTrace();
}
}
import com.itextpdf.text.Document;
import com.itextpdf.text.DocumentException;
import com.itextpdf.text.Image;
import com.itextpdf.text.pdf.PdfWriter;
...
// 将生成的二维码保存为PDF文件
private void saveQRCodeAsPDF(Bitmap bitmap, String filePath) {
Document document = new Document();
try {
PdfWriter.getInstance(document, new FileOutputStream(filePath));
document.open();
Image image = Image.getInstance(bitmapToByteArray(bitmap));
document.add(image);
document.close();
} catch (DocumentException | IOException e) {
e.printStackTrace();
}
}
// 将Bitmap转换为字节数组
private byte[] bitmapToByteArray(Bitmap bitmap) {
ByteArrayOutputStream stream = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.PNG, 100, stream);
return stream.toByteArray();
}
// 将PDF文件保存到设备中
private void savePDFFileToDevice(String filePath) {
File file = new File(filePath);
try {
InputStream inputStream = new FileInputStream(file);
OutputStream outputStream = new FileOutputStream(Environment.getExternalStorageDirectory() + "/Documents/qr_code.pdf");
byte[] buffer = new byte[1024];
int length;
while ((length = inputStream.read(buffer)) > 0) {
outputStream.write(buffer, 0, length);
}
outputStream.flush();
outputStream.close();
inputStream.close();
} catch (IOException e) {
e.printStackTrace();
}
}
以上是将生成的二维码转换成PDF文件并保存到Android Studio设备中的完整步骤和代码示例。请注意,这里没有提及任何特定的云计算品牌商,你可以根据自己的需求选择适合的云计算服务提供商。
没有搜到相关的文章
领取专属 10元无门槛券
手把手带您无忧上云