Android 去掉自定义dialog的白色边框的简单方法

<?xml version="1.0" encoding="utf-8"?>
<resources xmlns:android="http://schemas.android.com/apk/res/android">

    <style
        name="dialog"
        parent="@android:style/theme.dialog">
        <item name="android:windowframe">@null</item>
        <item name="android:windowisfloating">true</item>
        <item name="android:windowistranslucent">false</item>
        <item name="android:windownotitle">true</item>
        <item name="android:background">@android:color/black</item>
        <item name="android:windowbackground">@null</item>
        <item name="android:backgrounddimenabled">false</item>
    </style>
</resources>

progressdialog dialog = new progressdialog(progressbaractivity.this, r.style.dialog);