在BindingAdapter中使用@BindingConversion注解，将drawable类型参数转换为int类型参数。例如：

@BindingAdapter("app:image")
fun setImage(view: ImageView, drawable: Drawable?) {
    drawable?.let {
        val resourceId = getResourceId(it)
        if (resourceId != 0) {
            view.setImageResource(resourceId)
        }
    }
}

@BindingConversion
fun fromDrawable(drawable: Drawable): Int {
    return getResourceId(drawable)
}

private fun getResourceId(drawable: Drawable): Int {
    when (drawable) {
        is BitmapDrawable -> {
            val bitmap = drawable.bitmap
            val stream = ByteArrayOutputStream()
            bitmap.compress(Bitmap.CompressFormat.PNG, 100, stream)
            val byteArray = stream.toByteArray()
            return view.context.resources.getIdentifier(
                byteArray.toString(Charsets.UTF_8),
                "drawable",
                view.context.packageName
            )
        }
        is VectorDrawable -> {
            return view.context.resources.getIdentifier(
                drawable.name,
                "drawable",
                view.context.packageName
            )
        }
        else -> {
            // Other types of drawables
            return 0
        }
    }
}

其中，fromDrawable()函数将drawable类型参数转换为int类型参数，getResourceId()函数获取资源id。在BindingAdapter中，通过getResourceId()函数获取资源id，然后设置给ImageView。