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$Theme android.content.Context.getTheme()' on a null object reference
	at android.app.ActivityThread.performResumeActivity(ActivityThread.java:3865)
	at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:3916)
	at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3090)
	at android.app.ActivityThread.-wrap11(Unknown Source:0)
	at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1781)
	at android.os.Handler.dispatchMessage(Handler.java:106)
	at android.os.Looper.loop(Looper.java:210)
	at android.app.ActivityThread.main(ActivityThread.java:7080)
	at java.lang.reflect.Method.invoke(Native Method)
	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:523)
	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:863)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.res.Resources$Theme android.content.Context.getTheme()' on a null object reference
	at android.app.AlertDialog.resolveDialogTheme(AlertDialog.java:247)
	at android.app.AlertDialog$Builder.<init>(AlertDialog.java:477)
	at com.entitcs.office_attendance.model_classes.GPSTrackerJustForLatLong.f(Unknown Source:7)
	at com.entitcs.office_attendance.camera.FaceTrackerActivity.onResume(Unknown Source:19)
	at android.app.Instrumentation.callActivityOnResume(Instrumentation.java:1356)
	at android.app.Activity.performResume(Activity.java:7438)
	at android.app.ActivityThread.performResumeActivity(ActivityThread.java:3840)
	... 10 more