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Attempt to invoke virtual method 'boolean android.view.Display.isValid()' on a null object reference
java.lang.NullPointerException: Attempt to invoke virtual method 'boolean android.view.Display.isValid()' on a null object reference at com.google.vr.ndk.base.GvrLayout$PresentationHelper.isValidExternalDisplay(SourceFile:1230) at com.google.vr.ndk.base.GvrLayout$PresentationHelper.onDisplayAdded(SourceFile:1132) at android.hardware.display.DisplayManagerGlobal$DisplayListenerDelegate.handleMessage(DisplayManagerGlobal.java:464) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:148) at android.app.ActivityThread.main(ActivityThread.java:5442) at java.lang.reflect.Method.invoke(Method.java) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:738) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:628)