A simple way to add a predraw listener to a view

PreDrawer.java

public abstract class PreDrawer<T extends View> {

    // Private constructor prevent instantiation by the caller. Use addPredrawer() method instead.
    private PreDrawer(final T view) {
        
        // Adds the observer to the given view, then calls notifyPredraw() when clean up has been done ready
        final ViewTreeObserver viewTreeObserver = view.getViewTreeObserver();
        viewTreeObserver.addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() {
            @Override
            public boolean onPreDraw() {
                if (viewTreeObserver.isAlive()) {
                    viewTreeObserver.removeOnPreDrawListener(this);
                } else {
                    view.getViewTreeObserver().removeOnPreDrawListener(this);
                }

                notifyPreDraw(view);
                return true;
            }
        });
    }

    // abstract final void method to force implementation
    public abstract void notifyPreDraw(final T view);

    // Takes a given view, adds a predraw listener to it, then calls the listener when ready
    public static <T extends View> void addPreDrawer(T view, final OnPreDrawListener<T> listener) {
        new PreDrawer<T>(view) {
            @Override
            public void notifyPreDraw(final T view) {
                listener.onPreDraw(view);
            }
        };
    }

    // Interface to simplify callback. Essentially copied View.OnClickListener() code
    public interface OnPreDrawListener<T> {

        void onPreDraw(final T view);
    }
}