我想创建附加文件的第一页缩略图。文件可以是pdf word、excel。。。
比如whatsapp
https://i.stack.imgur.com/f6rcy.jpg
mycode是：

private fun selectDocument() {
        val intent = Intent(Intent.ACTION_GET_CONTENT).apply {
        type = "*/*"
        addCategory(Intent.CATEGORY_OPENABLE)
    }
    activity?.startActivityForResult(Intent.createChooser(intent, "Select a File to Upload"), REQUEST_DOCUMENT_GET)
}

        override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
    cameraHelper?.onActivityResultNoCrop(requestCode, resultCode, data)
    if (requestCode == REQUEST_DOCUMENT_GET && resultCode == Activity.RESULT_OK) {
        val path = data?.data?.path

    }
}