67 lines
1.7 KiB
Plaintext
67 lines
1.7 KiB
Plaintext
page.title=Managing Device Awake State
|
|
page.tags=
|
|
|
|
trainingnavtop=true
|
|
startpage=true
|
|
|
|
|
|
@jd:body
|
|
<div id="tb-wrapper">
|
|
<div id="tb">
|
|
|
|
<!-- Required platform, tools, add-ons, devices, knowledge, etc. -->
|
|
<h2>Dependencies and prerequisites</h2>
|
|
|
|
<ul>
|
|
<li>Android 1.6 (API Level 4) or higher</li>
|
|
</ul>
|
|
|
|
<h2>Try it out</h2>
|
|
|
|
<div class="download-box">
|
|
<a href="{@docRoot}shareables/training/Scheduler.zip"
|
|
class="button">Download the sample</a>
|
|
<p class="filename">Scheduler.zip</p>
|
|
</div>
|
|
|
|
</div>
|
|
</div>
|
|
|
|
<p>
|
|
When an Android device is left idle, it will first dim, then turn off the screen, and
|
|
ultimately turn off the CPU. This prevents the device's battery from quickly getting
|
|
drained. Yet there are times when your application might require a different behavior:</p>
|
|
|
|
<ul>
|
|
|
|
<li>Apps such as games or movie apps may need to keep the screen turned on.</p>
|
|
|
|
<li>Other applications may not need the screen to remain on, but they may require the CPU
|
|
to keep running until a critical operation finishes.</p>
|
|
|
|
</ul>
|
|
|
|
<p>
|
|
This class describes how to keep a device awake when necessary without draining
|
|
its battery.
|
|
</p>
|
|
<h2>Lessons</h2>
|
|
|
|
<dl>
|
|
<dt>
|
|
<strong><a href="wakelock.html">Keeping the Device Awake</a></strong>
|
|
</dt>
|
|
<dd>
|
|
Learn how to keep the screen or CPU awake as needed, while minimizing the impact
|
|
on battery life.
|
|
</dd>
|
|
<dt>
|
|
<strong><a href="alarms.html">Scheduling Repeating Alarms</a></strong>
|
|
</dt>
|
|
<dd>
|
|
Learn how to use repeating alarms to schedule operations that take place outside
|
|
of the lifetime of the application, even if the application is not running and/or the
|
|
device is asleep.
|
|
</dd>
|
|
</dl>
|