java.lang.RuntimeException: Unable to resume activity {com.entitcs.office_attendance/com.entitcs.office_attendance.camera.FaceTrackerActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.res.Resources$Theme android.content.Context.getTheme()' on a null object reference
	at android.app.ActivityThread.performResumeActivity(ActivityThread.java:4221)
	at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:4323)
	at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3426)
	at android.app.ActivityThread.access$1100(ActivityThread.java:229)
	at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1821)
	at android.os.Handler.dispatchMessage(Handler.java:102)
	at android.os.Looper.loop(Looper.java:148)
	at android.app.ActivityThread.main(ActivityThread.java:7325)
	at java.lang.reflect.Method.invoke(Native Method)
	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230)
	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.res.Resources$Theme android.content.Context.getTheme()' on a null object reference
	at android.app.AlertDialog.resolveDialogTheme(AlertDialog.java:236)
	at android.app.AlertDialog$Builder.<init>(AlertDialog.java:466)
	at com.entitcs.office_attendance.model_classes.GPSTrackerJustForLatLong.f(SourceFile)
	at com.entitcs.office_attendance.camera.FaceTrackerActivity.onResume(SourceFile)
	at android.app.Instrumentation.callActivityOnResume(Instrumentation.java:1287)
	at android.app.Activity.performResume(Activity.java:7015)
	at android.app.ActivityThread.performResumeActivity(ActivityThread.java:4210)
	... 10 more