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Attempt to invoke virtual method 'void com.example.niloofar.showroom.BeaconsFragment.onScannerClosed()' on a null object reference
java.lang.NullPointerException: Attempt to invoke virtual method 'void com.example.niloofar.showroom.BeaconsFragment.onScannerClosed()' on a null object reference at com.example.niloofar.showroom.BeaconScannerFragment.onCancel(BeaconScannerFragment.java:56) at android.app.Dialog$ListenersHandler.handleMessage(Dialog.java:1260) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:135) at android.app.ActivityThread.main(ActivityThread.java:5257) at java.lang.reflect.Method.invoke(Native Method) at java.lang.reflect.Method.invoke(Method.java:372) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:921) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:716)