Sure! Let's make that dialog 10 times bigger than normal and make sure the PDF preview is as large as possible for better readability.

First, you can set the width and height of the dialog to match the parent's size. Keep in mind that making the dialog too large might cause usability issues, but hey – if you want a dialog the size of the Shangri-La, who am I to judge?

Here's how you can modify your code to achieve this:

private fun showPdfPreviewDialog(pdfFile: File) {
    val dialogView = LayoutInflater.from(requireContext()).inflate(R.layout.dialog_pdf_preview, null)
    val ivPdfPreview = dialogView.findViewById<ImageView>(R.id.ivPdfPreview)
    val btnSavePdf = dialogView.findViewById<Button>(R.id.btnSavePdf)

    // Set ImageView to be as large as possible
    val layoutParams = ivPdfPreview.layoutParams
    layoutParams.width = ViewGroup.LayoutParams.MATCH_PARENT
    layoutParams.height = ViewGroup.LayoutParams.MATCH_PARENT
    ivPdfPreview.layoutParams = layoutParams

    renderPdfToImageView(pdfFile, ivPdfPreview)

    val dialog = AlertDialog.Builder(requireContext())
        .setTitle("PDF Preview")
        .setView(dialogView)
        .setNegativeButton("Cancel", null)
        .create()

    val window = dialog.window
    if (window != null) {
        // Make the dialog fill the screen
        val layoutParams = WindowManager.LayoutParams()
        layoutParams.copyFrom(window.attributes)
        layoutParams.width = WindowManager.LayoutParams.MATCH_PARENT
        layoutParams.height = WindowManager.LayoutParams.MATCH_PARENT
        window.attributes = layoutParams
    }

    btnSavePdf.setOnClickListener {
        savePdfFile(pdfFile)
        dialog.dismiss()
    }

    dialog.show()
}

In this update:

• The ivPdfPreview ImageView is set to match the parent's width and height.
• After creating the AlertDialog, I ensure that its width and height are set to match the parent's dimensions by manipulating the WindowManager.LayoutParams.

Now, when you show the dialog, it should cover the entire screen, making your PDF preview as big as possible. Your users might need sunglasses for that PDF flash, but at least they'll have no excuse for not seeing the contents!

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