原由：部分機(jī)型辽俗，會有padding值晌柬，強(qiáng)制去除padding值即可：
override fun onActivityCreated(savedInstanceState: Bundle?) {
super.onActivityCreated(savedInstanceState)
dialog?.window?.decorView?.setPadding(0, 0, 0, 0) //消除邊距
dialog?.window?.setLayout(WindowManager.LayoutParams.MATCH_PARENT,WindowManager.LayoutParams.WRAP_CONTENT)
}
