DialogFragment全透明设置

override fun initView() {
        val attributes = dialog?.window?.attributes
        attributes?.apply {
            width = ViewGroup.LayoutParams.MATCH_PARENT
            height = ViewGroup.LayoutParams.MATCH_PARENT
            gravity = Gravity.TOP
            dimAmount = 0f // 去除半透明遮罩
            flags = flags or WindowManager.LayoutParams.FLAG_DIM_BEHIND // 去除半透明遮罩
        }