java.lang.NullPointerException

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    • java.lang.NullPointerException: Attempt to invoke virtual method 'void pts3.botanicagofinal.BackgroundMusic.stop()' on a null object reference at pts3.botanicagofinal.Parametres$3.onCheckedChanged(Parametres.java:61) at android.widget.CompoundButton.setChecked(CompoundButton.java:156) at android.widget.Switch.setChecked(Switch.java:1071) at android.widget.Switch.toggle(Switch.java:1066) at android.widget.CompoundButton.performClick(CompoundButton.java:120) at android.view.View$PerformClick.run(View.java:22314) at android.os.Handler.handleCallback(Handler.java:751) at android.os.Handler.dispatchMessage(Handler.java:95) at android.os.Looper.loop(Looper.java:241) at android.app.ActivityThread.main(ActivityThread.java:6223) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:865) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755)
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