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Attempt to invoke virtual method 'boolean android.support.v7.widget.RecyclerView$LayoutManager.canScrollVertically()' on a null object reference
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Attempt to invoke virtual method 'boolean android.support.v7.widget.RecyclerView$LayoutManager.canScrollVertically()' on a null object reference
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Attempt to invoke virtual method 'boolean android.support.v7.widget.RecyclerView$LayoutManager.canScrollVertically()' on a null object reference
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Attempt to invoke virtual method 'boolean android.support.v7.widget.RecyclerView$LayoutManager.canScrollVertically()' on a null object reference
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Attempt to invoke virtual method 'boolean android.support.v7.widget.RecyclerView$LayoutManager.canScrollVertically()' on a null object reference
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Attempt to invoke virtual method 'boolean android.support.v7.widget.RecyclerView$LayoutManager.canScrollVertically()' on a null object reference
java.lang.NullPointerException: Attempt to invoke virtual method 'boolean android.support.v7.widget.RecyclerView$LayoutManager.canScrollVertically()' on a null object reference	at android.support.v7.widget.RecyclerView.computeVerticalScrollRange(RecyclerView.java:1581)	at android.view.View.onDrawScrollBars(View.java:13941)	at android.view.View.onDrawForeground(View.java:17680)	at android.view.View.draw(View.java:16212)	at android.support.v7.widget.RecyclerView.draw(RecyclerView.java:3171)	at android.view.View.updateDisplayListIfDirty(View.java:15198)	at android.view.View.draw(View.java:15971)	at android.view.ViewGroup.drawChild(ViewGroup.java:3610)	at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3400)	at android.view.View.draw(View.java:16204)	at android.view.View.updateDisplayListIfDirty(View.java:15198)	at android.view.View.draw(View.java:15971)	at android.view.ViewGroup.drawChild(ViewGroup.java:3610)	at android.support.design.widget.CoordinatorLayout.drawChild(CoordinatorLayout.java:1074)	at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3400)	at android.view.View.updateDisplayListIfDirty(View.java:15193)	at android.view.View.draw(View.java:15971)	at android.view.ViewGroup.drawChild(ViewGroup.java:3610)	at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3400)	at android.view.View.updateDisplayListIfDirty(View.java:15193)	at android.view.View.draw(View.java:15971)	at android.view.ViewGroup.drawChild(ViewGroup.java:3610)	at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3400)	at android.view.View.updateDisplayListIfDirty(View.java:15193)	at android.view.View.draw(View.java:15971)	at android.view.ViewGroup.drawChild(ViewGroup.java:3610)	at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3400)	at android.view.View.updateDisplayListIfDirty(View.java:15193)	at android.view.View.draw(View.java:15971)	at android.view.ViewGroup.drawChild(ViewGroup.java:3610)	at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3400)	at android.view.View.draw(View.java:16204)	at com.android.internal.policy.PhoneWindow$DecorView.draw(PhoneWindow.java:2690)	at android.view.View.updateDisplayListIfDirty(View.java:15198)	at android.view.ThreadedRenderer.updateViewTreeDisplayList(ThreadedRenderer.java:282)	at android.view.ThreadedRenderer.updateRootDisplayList(ThreadedRenderer.java:288)	at android.view.ThreadedRenderer.draw(ThreadedRenderer.java:323)	at android.view.ViewRootImpl.draw(ViewRootImpl.java:2635)	at android.view.ViewRootImpl.performDraw(ViewRootImpl.java:2454)	at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2087)	at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1127)	at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6038)	at android.view.Choreographer$CallbackRecord.run(Choreographer.java:860)	at android.view.Choreographer.doCallbacks(Choreographer.java:672)	at android.view.Choreographer.doFrame(Choreographer.java:608)	at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:846)	at android.os.Handler.handleCallback(Handler.java:739)	at android.os.Handler.dispatchMessage(Handler.java:95)	at android.os.Looper.loop(Looper.java:148)	at android.app.ActivityThread.main(ActivityThread.java:5438)	at java.lang.reflect.Method.invoke(Native Method)	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:739)	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:629)