java.lang.NumberFormatException: For input string: ""
	at java.lang.Integer.parseInt(Integer.java:620)
	at java.lang.Integer.parseInt(Integer.java:643)
	at com.entitcs.office_attendance.activities.ShowSubscriptionPage$k.onClick(Unknown Source:174)
	at android.view.View.performClick(View.java:6412)
	at android.view.View$PerformClick.run(View.java:25341)
	at android.os.Handler.handleCallback(Handler.java:790)
	at android.os.Handler.dispatchMessage(Handler.java:99)
	at android.os.Looper.loop(Looper.java:214)
	at android.app.ActivityThread.main(ActivityThread.java:6977)
	at java.lang.reflect.Method.invoke(Native Method)
	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:528)
	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:910)