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Attempt to invoke virtual method 'void com.facebook.ads.internal.DisplayAdController.c()' on a null object reference
java.lang.NullPointerException: Attempt to invoke virtual method 'void com.facebook.ads.internal.DisplayAdController.c()' on a null object reference at com.facebook.ads.InterstitialAd.show(Unknown Source) at com.appster.map.MapActivity$1.run(MapActivity.java:161) at android.os.Handler.handleCallback(Handler.java:739) at android.os.Handler.dispatchMessage(Handler.java:95) at android.os.Looper.loop(Looper.java:148) at android.app.ActivityThread.main(ActivityThread.java:5551) at java.lang.reflect.Method.invoke(Method.java) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:730) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:620)