<p>reading android source code <a href="https://chromium.googlesource.com/aosp/platform/system/core/+/master/bootstat/bootstat.cpp#458" target="_blank" rel="nofollow noopener" translate="no"><span class="invisible">https://</span><span class="ellipsis">chromium.googlesource.com/aosp</span><span class="invisible">/platform/system/core/+/master/bootstat/bootstat.cpp#458</span></a></p>