java.lang.NumberFormatException: For input string: ""
	at java.lang.Integer.parseInt(Integer.java:800)
	at java.lang.Integer.parseInt(Integer.java:908)
	at com.entitcs.office_attendance.activities.ShowSubscriptionPage$n.onClick(Unknown Source:168)
	at android.view.View.performClick(View.java:7798)
	at android.view.View.performClickInternal(View.java:7771)
	at android.view.View.-$$Nest$mperformClickInternal(Unknown Source:0)
	at android.view.View$PerformClick.run(View.java:31294)
	at android.os.Handler.handleCallback(Handler.java:958)
	at android.os.Handler.dispatchMessage(Handler.java:99)
	at android.os.Looper.loopOnce(Looper.java:222)
	at android.os.Looper.loop(Looper.java:314)
	at android.app.ActivityThread.main(ActivityThread.java:8716)
	at java.lang.reflect.Method.invoke(Native Method)
	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:565)
	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1081)