titlebar - Unwanted Title bar android -


i want remove unwanted title bar

enter image description here

i cant remove

i have tried 

 this.requestwindowfeature(window.feature_no_title);         this.getwindow().setflags(                 windowmanager.layoutparams.flag_fullscreen,                 windowmanager.layoutparams.flag_fullscreen);

this not title bar. actionbar or toolbar. should extend application theme theme.appcompat.noactionbar. or add android:theme="@style/theme.appcompat.noactionbar" <application/> tag in androidmanifest.xml


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