java.lang.NullPointerException: Attempt to invoke interface method 'java.lang.Object[] java.util.Collection.toArray()' on a null object reference
	at java.util.ArrayList.addAll(ArrayList.java:188)
	at com.entitcs.office_attendance.activities.LeaveManagement$h.onPostExecute(SourceFile)
	at android.os.AsyncTask.finish(AsyncTask.java:636)
	at android.os.AsyncTask.access$500(AsyncTask.java:177)
	at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:653)
	at android.os.Handler.dispatchMessage(Handler.java:102)
	at android.os.Looper.loop(Looper.java:135)
	at android.app.ActivityThread.main(ActivityThread.java:5669)
	at java.lang.reflect.Method.invoke(Native Method)
	at java.lang.reflect.Method.invoke(Method.java:372)
	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:960)
	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755)