s the user an option to quit the app. It's critical
to design responsiveness into your application so the system never displays
an ANR dialog to the user. </p>

<p>This document describes how the Android system determines whether an
application is not responding and provides guidelines for ensuring that your
application stays responsive. </p>


<h2 id="anr">What Triggers ANR?</h2>

<p>Generally, the system displays an ANR if an application cannot respond to
user input. For example, if an  application blocks