Associer le gadget à une activité

Bonjour
Pour associer le gadget à une activité sous Android voici un exemple démonstratif:

public class WidgetConfigActivity
extends PreferenceActivity
implements OnPreferenceChangeListener{
int mAppWidgetId;

@Override
protected void onCreate(BundlesavedInstanceState{
super.onCreate(savedInstanceState);

addPreferencesFromResource(R.xml.preferences); findPreference("text").setOnPreferenceChangeListener(this);

mAppWidgetId = getIntent().getIntExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, AppWidgetManager.INVALID_APPWIDGET_ID);

if(mAppWidgetId == AppWidgetManager.INVALID_APPWIDGET_ID){
setResult(Activity.RESULT_CANCELED);
finish();
}else{

Intent resultValue= new Intent();
resultValue.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, mAppWidgetId);
setResult(RESULT_OK, resultValue);
}
}
@Override
public boolean onPreferenceChange(Preference preference,Object newValue){

Intent intent =newIntent(AppWidgetManager.ACTION_APPWIDGET_UPDATE);intent.putExtra
(AppWidgetManager.EXTRA_APPWIDGET_IDS,new int[]{mAppWidgetId});

sendBroadcast(intent);
return true;
}
}