android dialog set full screen translucent background color

The style code is as follows:

<style name= "Theme_dialog" parent= "@android: Style/theme.dialog" >
    <item name= "Android:windowfullscreen" >true</item>
    <item name= "Android:windownotitle" >true</item>
    <item name= "Android:windowisfloating" >true</item>
    <item name= "android:backgrounddimenabled" >true</item>   makes the dialog box background color Black
    <item name= "Android:background" > @android:color/transparent</item>
    <item name= "Android:windowbackground" > @android:color/transparent</item>
    <item name= "Android:backgrounddimamount" >0.8</item>   background color adjustment, 1 full black, system default 0.5
</style>

Java references:

Dialig Dialog = New Dialog (context, R.style.theme_dialog);
View view = view.inflate (context, r.layout.test_layout, null);
Dialog.setcontentview (view);

android dialog set full screen translucent background color