Custom listener toujours null

Bonjour à tous !

J'ai créé à ma sauce le bouton switch suivant :

Code:

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public class MySwitch extends RelativeLayout 
{
 
	public interface OnCheckListener
	{
		void onCheckedEvent(View event);
	}
 
	private OnCheckListener onCheckListener = null;
 
	public void setOnCheckListener(OnCheckListener onCheckListener) {
		this.onCheckListener = onCheckListener;
	}
 
	public void setChecked(boolean checked) {
		this.checked = checked;
		Log.e("[TRACE]", "this.onCheckListener : " + this.onCheckListener);
		if(onCheckListener != null)
		{
			onCheckListener.onCheckedEvent(this);
		}
	}
 
}

Code:

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public class parameter_fragment extends Fragment
{
	private Context context = null;
	private MySwitch service = null;
 
	@Override
	public View onCreateView(LayoutInflater inflater, ViewGroup container,
			Bundle savedInstanceState) {
		// TODO Auto-generated method stub
		View view = inflater.inflate(R.layout.parameters_fragment,container,false);
 
		context = getActivity().getBaseContext();
 
		Log.e("[TRACE]", "**onCreateView**");
 
		return view;
	}
 
	@Override
	public void onAttach(Activity activity) {
		// TODO Auto-generated method stub
		super.onAttach(activity);
		Log.e("[TRACE]", "**onAttach**");
	}
 
	@Override
	public void onDetach() {
		// TODO Auto-generated method stub
		super.onDetach();
	}
 
	@Override
	public void onStart() {
		// TODO Auto-generated method stub
		super.onStart();
		Log.e("[TRACE]", "**onStart**");
		parametersList();
	}
 
	private void parametersList() {
		// TODO Auto-generated method stub
		service = new MySwitch(context);
		service.setOnCheckListener(new MySwitch.OnCheckListener() {
			@Override
			public void onCheckedEvent(View event) {
				// TODO Auto-generated method stub
				Log.e("[TRACE]", "service");
				if(service.isChecked())
				{
					Intent intent = new Intent(context, iLogService.class);
					context.startService(intent);
				}
				else
				{
					Intent intent = new Intent(context, iLogService.class);
					context.stopService(intent);
				}
			}
		});
	}
}

Dès que mon switch fait appel à la méthode

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public void setChecked(boolean checked) {
		this.checked = checked;
		Log.e("[TRACE]", "this.onCheckListener : " + this.onCheckListener);
		if(onCheckListener != null)
		{
			onCheckListener.onCheckedEvent(this);
		}
	}

la console m'affiche : this.onCheckListener : this.onCheckListener = null :(

Une idée ? Merci d'avance :)