@BindingAdapter("android:prompt") @SuppressWarnings("unused")
	public static void setPrompt(final View view, final MaterialTapTargetPrompt.Builder prompt) {
		if (prompt == null) return;
		if (prompt == view.getTag(R.id.prompt)) return;		// Invocation de-dup
		view.setTag(R.id.prompt, prompt);

		prompt.setTarget(findProperTarget(view)).show();
	}
Helper for manipulate user guide menu

Created by Oasis on 2017/3/14.
mobile/src/main/java/com/oasisfeng/island/guide/UserGuide.java