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:3780)
	at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3947)
	at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:106)
	at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
	at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
	at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2325)
	at android.os.Handler.dispatchMessage(Handler.java:106)
	at android.os.Looper.loopOnce(Looper.java:210)
	at android.os.Looper.loop(Looper.java:299)
	at android.app.ActivityThread.main(ActivityThread.java:8280)
	at java.lang.reflect.Method.invoke(Native Method)
	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:576)
	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1073)
Caused by: java.lang.NumberFormatException: s == null
	at java.lang.Integer.parseInt(Integer.java:709)
	at java.lang.Integer.parseInt(Integer.java:865)
	at com.entitcs.office_attendance.activities.Drawer_Activity.onCreate(Unknown Source:512)
	at android.app.Activity.performCreate(Activity.java:8163)
	at android.app.Activity.performCreate(Activity.java:8130)
	at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1329)
	at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3753)
	... 12 more