java.lang.NullPointerException: Attempt to invoke interface method 'void com.example.charl.walkthisway.CreateNewGoal$CreateNewGoalDialogListener.updateList()' on a null object reference

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    Root Cause Analysis

    1. java.lang.NullPointerException

      Attempt to invoke interface method 'void com.example.charl.walkthisway.CreateNewGoal$CreateNewGoalDialogListener.updateList()' on a null object reference

      at com.example.charl.walkthisway.CreateNewGoal$2.onClick()
    2. com.example.charl
      CreateNewGoal$2.onClick
      1. com.example.charl.walkthisway.CreateNewGoal$2.onClick(CreateNewGoal.java:110)
      1 frame
    3. Android
      AlertController$ButtonHandler.handleMessage
      1. com.android.internal.app.AlertController$ButtonHandler.handleMessage(AlertController.java:163)
      1 frame
    4. Android Platform
      ActivityThread.main
      1. android.os.Handler.dispatchMessage(Handler.java:102)
      2. android.os.Looper.loop(Looper.java:148)
      3. android.app.ActivityThread.main(ActivityThread.java:5417)
      3 frames
    5. Java RT
      Method.invoke
      1. java.lang.reflect.Method.invoke(Native Method)
      1 frame
    6. Android
      ZygoteInit.main
      1. com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
      2. com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
      2 frames