java.lang.RuntimeException: Unable to start activity ComponentInfo{com.entitcs.office_attendance/com.entitcs.office_attendance.activities.Drawer_Activity}: java.lang.NumberFormatException: s == null
	at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3114)
	at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3257)
	at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78)
	at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108)
	at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68)
	at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1948)
	at android.os.Handler.dispatchMessage(Handler.java:106)
	at android.os.Looper.loop(Looper.java:214)
	at android.app.ActivityThread.main(ActivityThread.java:7050)
	at java.lang.reflect.Method.invoke(Native Method)
	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:494)
	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:965)
Caused by: java.lang.NumberFormatException: s == null
	at java.lang.Integer.parseInt(Integer.java:577)
	at java.lang.Integer.parseInt(Integer.java:650)
	at com.entitcs.office_attendance.activities.Drawer_Activity.onCreate(Drawer_Activity.java:430)
	at android.app.Activity.performCreate(Activity.java:7327)
	at android.app.Activity.performCreate(Activity.java:7318)
	at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1271)
	at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3094)
	... 11 more