activity主题

<style name="Theme.Gallery" parent="android:Theme.Light.NoTitleBar.Fullscreen">
        <item name="android:windowBackground">@color/black</item>
        <item name="android:windowIsTranslucent">true</item>
 </style>

<style name="KeepInfoActivityStyle" parent="Theme.AppCompat.NoActionBar">
        <item name="android:windowBackground">@color/transparent</item>
        <item name="android:windowIsTranslucent">true</item>
</style>