java.lang.RuntimeException: Unable to start activity ComponentInfo{com.entitcs.office_attendance/com.entitcs.office_attendance.camera.FaceTrackerActivity}: android.util.AndroidRuntimeException: requestFeature() must be called before adding content
	at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2517)
	at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2577)
	at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:4202)
	at android.app.ActivityThread.access$1100(ActivityThread.java:166)
	at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1420)
	at android.os.Handler.dispatchMessage(Handler.java:102)
	at android.os.Looper.loop(Looper.java:148)
	at android.app.ActivityThread.main(ActivityThread.java:5628)
	at java.lang.reflect.Method.invoke(Native Method)
	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:853)
	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:737)
Caused by: android.util.AndroidRuntimeException: requestFeature() must be called before adding content
	at com.android.internal.policy.PhoneWindow.requestFeature(PhoneWindow.java:352)
	at android.app.Activity.requestWindowFeature(Activity.java:3755)
	at com.entitcs.office_attendance.camera.FaceTrackerActivity.onCreate(SourceFile)
	at android.app.Activity.performCreate(Activity.java:6351)
	at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1114)
	at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2470)
	... 10 more