如何在PDFBox Android中添加图像作为页面

Question

我在我的安卓项目中添加了PdfBox安卓端口。

我写了以下代码

try
{
    PDDocument document = new PDDocument();
    PDPage page = new PDPage();
    // page.set
    document.addPage(page);

    // Create a new font object selecting one of the PDF base fonts
    PDFont font = PDType1Font.HELVETICA_BOLD;
    File mediaStorageDir = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES), "myapp");
    File phone = new File(mediaStorageDir.getPath() + File.separator + "image.jpg");
    FileInputStream mInput = new FileInputStream(phone);   
             PDStream steam1 = new PDStream(document, mInput);
    PDResources resource1 = new PDResources();
    PDImageXObject img = new PDImageXObject(steam1, resource1);
    PDPageContentStream contentStream = new PDPageContentStream(
    document, page);
    contentStream.drawImage(img, 100, 100);
    contentStream.close();
    document.save("Hello World.pdf");
    document.close();
}
catch(Exception e)
{
}

当我执行时，它执行得很好，直到下面一行

PDImageXObject img = new PDImageXObject(steam1, resource1);

我得到跟随错误

java.io.IOException:空流未被读取

如何解决这个问题？我想我漏掉了什么。请帮帮我!

Answer 1

使用JPEGFactory，而不是PDImageXObject：

PDImageXObject img = JPEGFactory.createFromStream(document, mInput);

用PDResources和PDStream删除行。因此，您的代码将如下所示：

try
{
    PDDocument document = new PDDocument();
    PDPage page = new PDPage();
    // page.set
    document.addPage(page);

    // Create a new font object selecting one of the PDF base fonts
    PDFont font = PDType1Font.HELVETICA_BOLD;
    File mediaStorageDir = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES), "myapp");
    File phone = new File(mediaStorageDir.getPath() + File.separator + "image.jpg");
    FileInputStream mInput = new FileInputStream(phone);   
    PDImageXObject img = JPEGFactory.createFromStream(document, mInput);
    PDPageContentStream contentStream = new PDPageContentStream(document, page);
    contentStream.drawImage(img, 100, 100);
    contentStream.close();
    document.save(mediaStorageDir.getPath() + File.separator + "Hello World.pdf");
    document.close();
}
catch(Exception e)
{
}

(这个答案只适用于Android版本)