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Attempt to invoke virtual method 'android.view.View android.view.View.findViewById(int)' on a null object reference
java.lang.NullPointerException: Attempt to invoke virtual method 'android.view.View android.view.View.findViewById(int)' on a null object reference	at org.osmdroid.views.overlay.infowindow.MarkerInfoWindow.onOpen(MarkerInfoWindow.java:58)	at org.osmdroid.views.overlay.infowindow.InfoWindow.open(InfoWindow.java:79)	at org.osmdroid.views.overlay.Marker.showInfoWindow(Marker.java:264)	at org.osmdroid.views.overlay.Marker.onMarkerClickDefault(Marker.java:414)	at org.osmdroid.views.overlay.Marker.onSingleTapConfirmed(Marker.java:353)	at org.osmdroid.views.overlay.DefaultOverlayManager.onSingleTapConfirmed(DefaultOverlayManager.java:237)	at org.osmdroid.views.MapView$MapViewDoubleClickListener.onSingleTapConfirmed(MapView.java:1381)	at android.view.GestureDetector$GestureHandler.handleMessage(GestureDetector.java:300)	at android.os.Handler.dispatchMessage(Handler.java:102)	at android.os.Looper.loop(Looper.java:148)	at android.app.ActivityThread.main(ActivityThread.java:5417)	at java.lang.reflect.Method.invoke(Native Method)	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)