java.lang.NullPointerException

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  • android listener interface variable null
    via Stack Overflow by kimms
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    • java.lang.NullPointerException: Attempt to invoke virtual method 'void hci.parrot_bebop.view.BebopVideoView.setOnVariableChanged(hci.parrot_bebop.view.BebopVideoView$VariableChanger)' on a null object reference at hci.parrot_bebop.activity.BebopActivity$1$1.run(BebopActivity.java:132) at java.util.Timer$TimerImpl.run(Timer.java:284)
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