java.lang.NullPointerException: Attempt to invoke virtual method 'void pts3.botanicagofinal.BackgroundMusic.stop()' on a null object reference

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    Root Cause Analysis

    1. java.lang.NullPointerException

      Attempt to invoke virtual method 'void pts3.botanicagofinal.BackgroundMusic.stop()' on a null object reference

      at pts3.botanicagofinal.Parametres$3.onCheckedChanged()
    2. pts3.botanicagofinal
      Parametres$3.onCheckedChanged
      1. pts3.botanicagofinal.Parametres$3.onCheckedChanged(Parametres.java:61)
      1 frame
    3. Android Platform
      ActivityThread.main
      1. android.widget.CompoundButton.setChecked(CompoundButton.java:156)
      2. android.widget.Switch.setChecked(Switch.java:1071)
      3. android.widget.Switch.toggle(Switch.java:1066)
      4. android.widget.CompoundButton.performClick(CompoundButton.java:120)
      5. android.view.View$PerformClick.run(View.java:22314)
      6. android.os.Handler.handleCallback(Handler.java:751)
      7. android.os.Handler.dispatchMessage(Handler.java:95)
      8. android.os.Looper.loop(Looper.java:241)
      9. android.app.ActivityThread.main(ActivityThread.java:6223)
      9 frames
    4. Java RT
      Method.invoke
      1. java.lang.reflect.Method.invoke(Native Method)
      1 frame
    5. Android
      ZygoteInit.main
      1. com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:865)
      2. com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755)
      2 frames