Itext 5.5 从外部驱动器添加图像到PDF中

Question

我正在使用这种方法来添加图像到我的PDF。

@Throws(DocumentException::class)
    private fun addImage(document: Document)
    {
        try {
            val rectDoc = document.pageSize
            val width = rectDoc.width
            val height = rectDoc.height
            val imageStartX = width - document.rightMargin() - 300f//Absolute Position X
            val imageStartY = height - document.topMargin() - 500f//Absolute Position Y
            System.gc()

            val ims: InputStream? = activity?.assets?.open("test.jpg")//File Location
            val bmp = BitmapFactory.decodeStream(ims)
            val stream = ByteArrayOutputStream()
            bmp.compress(Bitmap.CompressFormat.JPEG, 100, stream)
            val byteArray: ByteArray = stream.toByteArray()

            val img = Image.getInstance(byteArray) // img.scalePercent(50);
            img.alignment = Image.TEXTWRAP
            img.scaleAbsolute(200f, 200f) // ReAdjusting the JPG
            img.setAbsolutePosition(imageStartX, imageStartY) // Adding Image
            document.add(img)
        } catch (e: Exception)
        {
            e.printStackTrace()
            Log.e("JPG ERROR", e.message)
        }
    }

这个代码块可以帮助我从assets文件夹中添加图片，我需要的是我需要从外部驱动器中添加一个特定的图像。我正在用同一个应用程序生成JPG文件，保存JPG文件。

我找到了这个代码块来获取我的文件。

val absoluteFile = "UserSignature/Signature.jpg"

            val photoUri: Uri = Uri.withAppendedPath(
                MediaStore.Images.Media.getContentUri(MediaStore.VOLUME_EXTERNAL), absoluteFile)

下面是这个的输出。 content:/mediaexternalimagesmediaUserSignatureSignature.jpg。

我可以用同样的功能吗？如果不能，我怎么能呢，谢谢。

EDIT: 这里是解决方案

@Throws(DocumentException::class , IOException::class)
private fun addImageFromGallery(document: Document)
{
    try {
        val rectDoc = document.pageSize
        val width = rectDoc.width
        val height = rectDoc.height
        val imageStartX = width - document.rightMargin() - 300f//Absolute Position X
        val imageStartY = height - document.topMargin() - 500f//Absolute Position Y
        System.gc()

        val fileLocation = "/storage/emulated/0/Pictures/UserSignature/Signature.jpg"//Example Location - Gallery/UserSignature/Signature.JPG file
        val ims = FileInputStream(fileLocation)
        Log.d("FileInputStreamDebugTag", "Value: $ims")

        val bmp = BitmapFactory.decodeStream(ims)
        val stream = ByteArrayOutputStream()
        bmp.compress(Bitmap.CompressFormat.JPEG, 100, stream)
        val byteArray: ByteArray = stream.toByteArray()

        val img = Image.getInstance(byteArray) // img.scalePercent(50);
        img.alignment = Image.TEXTWRAP
        img.scaleAbsolute(200f, 200f) // ReAdjusting the JPG
        img.setAbsolutePosition(imageStartX, imageStartY) // Adding Image
        document.add(img)
    } catch (e: Exception)
    {
        e.printStackTrace()
        Log.e("JPG ERROR", e.message)
    }
}