styles.xml

<style name="FullScreenDialogStyle" parent="Theme.AppCompat.Dialog">
        <item name="android:windowNoTitle">true</item>
        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
        <item name="colorPrimary">@color/colorPrimary</item>
  
        <!-- Set this to true if you want Full Screen without status bar -->
        <item name="android:windowFullscreen">false</item>
        
        <item name="android:windowIsFloating">false</item>
  
        <!-- This is important! Don't forget to set window background -->
        <item name="android:windowBackground">@color/colorWhite</item>
  
        <!-- Additionally if you want animations when dialog opening -->
        <item name="android:windowEnterAnimation">@anim/slide_up</item>
        <item name="android:windowExitAnimation">@anim/slide_down</item>
</style>