Utilidad para usar TextWatcher como lambda en TextView::addTextChangedListener

anonymous-class.java

TextView textView = new TextView(this);
textView.addTextChangedListener(new TextWatcherAdapter() {
	@Override
	public void action(Action action, CharSequence charOrEditable, int start, int count, int afterOrBefore) {
		if (action == Action.afterTextChanged) {
			// magia verde
		}
	}
});

lambda.java

TextView textView = new TextView(this);
textView.addTextChangedListener((TextWatcherAdapter) (action, charOrEditable, start, count, afterOrBefore) -> {
	if (action == TextWatcherAdapter.Action.afterTextChanged) {
		// magia verde
	}
});

TextWatcherAdapter.java

public interface TextWatcherAdapter extends TextWatcher {
	enum Action {
		beforeTextChanged,
		onTextChanged,
		afterTextChanged
	}

	default void beforeTextChanged(CharSequence s, int start, int count, int after) {
		this.action(Action.beforeTextChanged, s, start, count, after);
	}

	default void onTextChanged(CharSequence s, int start, int before, int count) {
		this.action(Action.onTextChanged, s, start, count, before);
	}

	default void afterTextChanged(Editable editable) {
		this.action(Action.afterTextChanged, editable, 0, 0, 0);
	}

	void action(Action action, CharSequence charOrEditable, int start, int count, int afterOrBefore);
}