How to get listener of a view

Question

I write service that interacts with other apps. It registers listeners on views (buttons, textviews,...), that already have listeners. I need to replace them with my own lis

Answer 1

public abstract class ReflectionUtils {

    private static final String listenerInfoFieldName = "mListenerInfo";
    private static final String onCLickListenerFieldName = "mOnClickListener";

    public static OnClickListener getOnClickListener(View view){
        Object listenerInfo = ReflectionUtils.getValueFromObject(view, listenerInfoFieldName, Object.class);
        return ReflectionUtils.getValueFromObject(listenerInfo, onCLickListenerFieldName, View.OnClickListener.class);
    }

    public static  T getValueFromObject(Object object, String fieldName, Class returnClazz){
        return getValueFromObject(object, object.getClass(), fieldName, returnClazz);
    }

    private static  T getValueFromObject(Object object, Class declaredFieldClass, String fieldName, Class returnClazz){
        try {
            Field field = declaredFieldClass.getDeclaredField(fieldName);
            field.setAccessible(true);
            Object value = field.get(object);
            return returnClazz.cast(value);
        } catch (NoSuchFieldException e) {
            Class superClass = declaredFieldClass.getSuperclass();
            if(superClass != null){
                return getValueFromObject(object, superClass, fieldName, returnClazz);
            }
        } catch (IllegalAccessException e) {
        }
        return null;
    }

}

Calling OnClickListener onClickListener = ReflectionUtils.getOnClickListener(myView); on myView will give you the myView's listener that you are looking for.