java.lang.RuntimeException: Unable to start activity ComponentInfo{com.entitcs.office_attendance/com.entitcs.office_attendance.activities.Drawer_Activity}: java.lang.NumberFormatException: null
	at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2951)
	at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3016)
	at android.app.ActivityThread.-wrap12(ActivityThread.java)
	at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1716)
	at android.os.Handler.dispatchMessage(Handler.java:110)
	at android.os.Looper.loop(Looper.java:232)
	at android.app.ActivityThread.main(ActivityThread.java:6806)
	at java.lang.reflect.Method.invoke(Native Method)
	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1103)
	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:964)
Caused by: java.lang.NumberFormatException: null
	at java.lang.Integer.parseInt(Integer.java:483)
	at java.lang.Integer.parseInt(Integer.java:556)
	at com.entitcs.office_attendance.activities.Drawer_Activity.onCreate(SourceFile)
	at android.app.Activity.performCreate(Activity.java:6974)
	at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1118)
	at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2904)
	... 9 more