How to initialse this code ? need help

how to initialse onConfigurationChanged code in main method contructor i wnt to initialse this code here …

public CustomExtension(ComponentContainer componentContainer)
{
super(componentContainer.$form());
this.container = componentContainer;

}

@Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);

if(newConfig.orientation==Configuration.ORIENTATION_LANDSCAPE){
 Log.e("On Config Change","LANDSCAPE");
}
else{
 Log.e("On Config Change","PORTRAIT");
}

}