java.lang.NullPointerException

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  • Android app crashing in GridLayout
    via Stack Overflow by The Thom
    ,
    • java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.Object android.widget.GridLayout$PackedMap.getValue(int)' on a null object reference at android.widget.GridLayout$Axis.computeGroupBounds(GridLayout.java:1304) at android.widget.GridLayout$Axis.getGroupBounds(GridLayout.java:1313) at android.widget.GridLayout$Axis.createLinks(GridLayout.java:1322) at android.widget.GridLayout$Axis.getForwardLinks(GridLayout.java:1348) at android.widget.GridLayout$Axis.createArcs(GridLayout.java:1473) at android.widget.GridLayout$Axis.getArcs(GridLayout.java:1506) at android.widget.GridLayout$Axis.solve(GridLayout.java:1686) at android.widget.GridLayout$Axis.computeLocations(GridLayout.java:1790) at android.widget.GridLayout$Axis.getLocations(GridLayout.java:1814) at android.widget.GridLayout$Axis.layout(GridLayout.java:1860) at android.widget.GridLayout.onLayout(GridLayout.java:1113) at android.view.View.layout(View.java:17993) at android.view.ViewGroup.layout(ViewGroup.java:5817) at android.support.design.widget.HeaderScrollingViewBehavior.layoutChild(HeaderScrollingViewBehavior.java:131) at android.support.design.widget.ViewOffsetBehavior.onLayoutChild(ViewOffsetBehavior.java:42) at android.support.design.widget.AppBarLayout$ScrollingViewBehavior.onLayoutChild(AppBarLayout.java:1319) at android.support.design.widget.CoordinatorLayout.onLayout(CoordinatorLayout.java:817) at android.view.View.layout(View.java:17993) at android.view.ViewGroup.layout(ViewGroup.java:5817) at android.widget.FrameLayout.layoutChildren(FrameLayout.java:344) at android.widget.FrameLayout.onLayout(FrameLayout.java:281) at android.view.View.layout(View.java:17993) at android.view.ViewGroup.layout(ViewGroup.java:5817) at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1742) at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1585) at android.widget.LinearLayout.onLayout(LinearLayout.java:1494) at android.view.View.layout(View.java:17993) at android.view.ViewGroup.layout(ViewGroup.java:5817) at android.widget.FrameLayout.layoutChildren(FrameLayout.java:344) at android.widget.FrameLayout.onLayout(FrameLayout.java:281) at android.view.View.layout(View.java:17993) at android.view.ViewGroup.layout(ViewGroup.java:5817) at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1742) at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1585) at android.widget.LinearLayout.onLayout(LinearLayout.java:1494) at android.view.View.layout(View.java:17993) at android.view.ViewGroup.layout(ViewGroup.java:5817) at android.widget.FrameLayout.layoutChildren(FrameLayout.java:344) at android.widget.FrameLayout.onLayout(FrameLayout.java:281) at com.android.internal.policy.PhoneWindow$DecorView.onLayout(PhoneWindow.java:3143) at android.view.View.layout(View.java:17993) at android.view.ViewGroup.layout(ViewGroup.java:5817) at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:2759) at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2460) at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1528) at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:7530) at android.view.Choreographer$CallbackRecord.run(Choreographer.java:911) at android.view.Choreographer.doCallbacks(Choreographer.java:686) at android.view.Choreographer.doFrame(Choreographer.java:622) at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:897) 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:7325) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)

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