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java.lang.NullPointerException: Attempt to invoke virtual method 'android.view.View android.view.View.findViewById(int)' on a null object reference	at com.appeaser.sublimepickerlibrary.datepicker.DayPickerView.onLayout(DayPickerView.java:280)	at android.view.View.layout(View.java:16646)	at android.view.ViewGroup.layout(ViewGroup.java:5440)	at android.widget.FrameLayout.layoutChildren(FrameLayout.java:336)	at android.widget.FrameLayout.onLayout(FrameLayout.java:273)	at android.view.View.layout(View.java:16646)	at android.view.ViewGroup.layout(ViewGroup.java:5440)	at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1743)	at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1586)	at android.widget.LinearLayout.onLayout(LinearLayout.java:1495)	at android.view.View.layout(View.java:16646)	at android.view.ViewGroup.layout(ViewGroup.java:5440)	at android.widget.FrameLayout.layoutChildren(FrameLayout.java:336)	at android.widget.FrameLayout.onLayout(FrameLayout.java:273)	at android.view.View.layout(View.java:16646)	at android.view.ViewGroup.layout(ViewGroup.java:5440)	at android.widget.RelativeLayout.onLayout(RelativeLayout.java:1079)	at android.view.View.layout(View.java:16646)	at android.view.ViewGroup.layout(ViewGroup.java:5440)	at android.support.design.widget.HeaderScrollingViewBehavior.layoutChild(HeaderScrollingViewBehavior.java:122)	at android.support.design.widget.ViewOffsetBehavior.onLayoutChild(ViewOffsetBehavior.java:42)	at android.support.design.widget.AppBarLayout$ScrollingViewBehavior.onLayoutChild(AppBarLayout.java:1192)	at android.support.design.widget.CoordinatorLayout.onLayout(CoordinatorLayout.java:814)	at android.view.View.layout(View.java:16646)	at android.view.ViewGroup.layout(ViewGroup.java:5440)	at android.widget.FrameLayout.layoutChildren(FrameLayout.java:336)	at android.widget.FrameLayout.onLayout(FrameLayout.java:273)	at android.view.View.layout(View.java:16646)	at android.view.ViewGroup.layout(ViewGroup.java:5440)	at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1743)	at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1586)	at android.widget.LinearLayout.onLayout(LinearLayout.java:1495)	at android.view.View.layout(View.java:16646)	at android.view.ViewGroup.layout(ViewGroup.java:5440)	at android.widget.FrameLayout.layoutChildren(FrameLayout.java:336)	at android.widget.FrameLayout.onLayout(FrameLayout.java:273)	at android.view.View.layout(View.java:16646)	at android.view.ViewGroup.layout(ViewGroup.java:5440)	at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1743)	at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1586)	at android.widget.LinearLayout.onLayout(LinearLayout.java:1495)	at android.view.View.layout(View.java:16646)	at android.view.ViewGroup.layout(ViewGroup.java:5440)	at android.widget.FrameLayout.layoutChildren(FrameLayout.java:336)	at android.widget.FrameLayout.onLayout(FrameLayout.java:273)	at com.android.internal.policy.PhoneWindow$DecorView.onLayout(PhoneWindow.java:2678)	at android.view.View.layout(View.java:16646)	at android.view.ViewGroup.layout(ViewGroup.java:5440)	at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:2183)	at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1943)	at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1119)	at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6060)	at android.view.Choreographer$CallbackRecord.run(Choreographer.java:858)	at android.view.Choreographer.doCallbacks(Choreographer.java:670)	at android.view.Choreographer.doFrame(Choreographer.java:606)	at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:844)	at android.os.Handler.handleCallback(Handler.java:746)	at android.os.Handler.dispatchMessage(Handler.java:95)	at android.os.Looper.loop(Looper.java:148)	at android.app.ActivityThread.main(ActivityThread.java:5443)