android - AppCompatActivity as a dialog without title -

i have activity inherited appcompactactivity. in manifest activity set theme:

<style name="theme.custom" parent="theme.appcompat.light.dialog">     <item name="android:windownotitle">true</item>     <item name="colorprimary">@color/primary</item>     <item name="colorprimarydark">@color/primary_dark</item>     <item name="coloraccent">@color/accent</item>     <item name="colorbuttonnormal">@color/accent</item>     <item name="android:buttonstyle">@style/buttonstyle</item> </style> 

when run activity, shows dialog, title shown! try supportrequestwindowfeature(window.feature_no_title) , requestwindowfeature(window.feature_no_title) title still displayed. please let me know, wrong?

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edit

i solve it, change android:windownotitle windownotitle! because use appcompactactvity!

if having appcompatactivity following won't work

requestwindowfeature(window.feature_no_title);

the simple way set in style.xml file.

<style name="mytheme" parent="theme.appcompat.light.dialog">     <item name="windownotitle">true</item> </style> 

it name="windownotitle", not name="android:windownotitle"

if want remove programmatically add following in oncreate()

getsupportactionbar().hide();