android - 从android的存储中获取位图时图像质量丢失

Question

从内部存储中获取图像文件并在 imageView 上显示时，我遇到了位图图像质量问题。如何使用位图显示具有原始质量的图像文件。

这是我的代码

 fun renderPdf(renderer: PdfRenderer, pagesBitmap: MutableList<Bitmap>, dir: File) {
    try {
        for (i in 0 until PAGE_COUNT) {
            val document: PDDocument = PDDocument.load(dir)
            val pdfRenderer = PDFRenderer(document)
            val bim = pdfRenderer.renderImage(i, 3.5f, Bitmap.Config.ARGB_8888!!)
            pagesBitmap.add(bim!!)
            document.close()
            // Save the render result to an image
            val path: String =
                Environment.getExternalStorageDirectory().toString() + "/.AOF/aof_$i.jpg"
            val renderFile = File(path)
            val fileOut = FileOutputStream(renderFile)
            pagesBitmap[i].compress(Bitmap.CompressFormat.JPEG, 100, fileOut)
            fileOut.close()
        }

        ivForm.pagesBitmap = pagesBitmapFiles
        ivForm.displayPDFDocument()
        renderer.close()
    } catch (e: IOException) {
        Log.e("PdfBox-Android-Sample", "Exception thrown while rendering file", e)
    } finally {
        callDocumentType()
    }
}

标签： androidandroid-bitmapimage-quality