java.lang.NullPointerException: Attempt to invoke virtual method 'boolean java.lang.String.equals(java.lang.Object)' on a null object reference
	at com.entitcs.office_attendance.background_works.d.b(Unknown Source:31)
	at com.entitcs.office_attendance.background_works.d.onPostExecute(Unknown Source:2)
	at android.os.AsyncTask.finish(AsyncTask.java:755)
	at android.os.AsyncTask.access$900(AsyncTask.java:192)
	at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:772)
	at android.os.Handler.dispatchMessage(Handler.java:107)
	at android.os.Looper.loop(Looper.java:223)
	at android.app.ActivityThread.main(ActivityThread.java:7562)
	at java.lang.reflect.Method.invoke(Native Method)
	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:539)
	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:950)