PdfRenderer.kt

    PdfRenderer(fd).use {renderer ->
        val count = renderer.pageCount
        val views = getPageViews(count)
        views.forEachIndexed {i, view ->
            renderer.openPage(i).use {page ->
                val bitmap = Bitmap.createBitmap(
                    view.width,
                    view.height,
                    Bitmap.Config.ARGB_8888)
                page.render(
                    bitmap,
                    null,
                    null,
                    PdfRenderer.Page.RENDER_MODE_FOR_DISPLAY)
                val drawable = BitmapDrawable(context.resources, bitmap)
                view.setImageDrawable(drawable)
            }
        }
    }