java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.ImageView.setLayoutParams(android.view.ViewGroup$LayoutParams)' on a null object reference

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Attempt to invoke virtual method 'void android.widget.ImageView.setLayoutParams(android.view.ViewGroup$LayoutParams)' on a null object reference
java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.ImageView.setLayoutParams(android.view.ViewGroup$LayoutParams)' on a null object reference
at com.leoybkim.watexam.ScheduleActivity.onCreateOptionsMenu(ScheduleActivity.java:91)

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