java.lang.NumberFormatException: For input string: "null"
	at java.lang.Integer.parseInt(Integer.java:615)
	at java.lang.Integer.valueOf(Integer.java:801)
	at com.entitcs.office_attendance.activities.LeaveRequest.showAlertDialog(LeaveRequest.java:1047)
	at com.entitcs.office_attendance.activities.LeaveRequest.access$300(LeaveRequest.java:74)
	at com.entitcs.office_attendance.activities.LeaveRequest$1.onItemSelected(LeaveRequest.java:229)
	at android.widget.AdapterView.fireOnSelected(AdapterView.java:1397)
	at android.widget.AdapterView.dispatchOnItemSelected(AdapterView.java:1386)
	at android.widget.AdapterView.access$300(AdapterView.java:61)
	at android.widget.AdapterView$SelectionNotifier.run(AdapterView.java:1344)
	at android.os.Handler.handleCallback(Handler.java:938)
	at android.os.Handler.dispatchMessage(Handler.java:99)
	at android.os.Looper.loop(Looper.java:246)
	at android.app.ActivityThread.main(ActivityThread.java:8653)
	at java.lang.reflect.Method.invoke(Native Method)
	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:602)
	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1130)