public static Spinner getInstance() {
        if (spinner == null) {
            spinner = new Spinner();
        }
        return spinner;
    }
<pre>
Spinner
</pre>

@author <a href="https://github.com/rememberber">RememBerBer</a>
@since 2019/7/19.
src/main/java/com/fangxuele/tool/push/ui/dialog/Spinner.java