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docs: Documented how to handle alarms in AA media apps.

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Bug:27708785
Change-Id: Iee2a676fd8adbcba00301932d5e5637ee21df224
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sreevanis
2016-06-03 12:43:52 -07:00
parent 0b8eb8c1e8
commit c2f67456aa
1 changed files with 39 additions and 0 deletions
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39
docs/html/training/auto/audio/index.jd
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@@ -20,6 +20,7 @@ page.image=auto/images/assets/icons/media_app_playback.png
<li><a href="#overview">Provide Audio Services</a></li>
<li><a href="#config_manifest">Configure Your Manifest</a></li>
<li><a href="#isconnected">Determine if Your App is Connected</a></li>
<li><a href="#alarm">Handle Alarms</a></li>
<li><a href="#implement_browser">Build a Browser Service</a></li>
<li><a href="#implement_callback">Implement Play Controls</a></li>
<li><a href="#support_voice">Support Voice Actions</a></li>
@@ -239,6 +240,44 @@ BroadcastReceiver receiver = new BroadcastReceiver() {
registerReceiver(receiver, filter);
</pre>
<h2 id="alarm">Handle Alarms</h2>
<p>
To prevent user distraction, Android Auto media apps must not start playing audio
through the car speakers unless a user consciously starts playback (such as
when the user presses play in your app). Even a user-scheduled alarm from the
media app must not start playing music through the car speakers.
If your media app has an alarm feature, the app should determine if the phone
is in
<a href="{@docRoot}reference/android/content/res/Configuration.html#UI_MODE_TYPE_CAR">car mode</a>
before playing any audio. Your app can do this by calling
<a href="{@docRoot}reference/android/app/UiModeManager.html">UiModeManager.getCurrentModeType()</a>,
which checks whether the device is running in car mode.
</p>
<p>
If the device is in car mode, media apps that support alarms must do one of the
following things:
<ul>
<li>Disable the alarm.</li>
<li>Play the alarm over
<a href="{@docRoot}reference/android/media/AudioManager.html">STREAM_ALARM</a>,
and provide a UI on the phone screen to disable the alarm.</li>
</ul>
The following code snippet checks whether an app is running in car mode:
<pre>
public static boolean isCarUiMode(Context c) {
UiModeManager uiModeManager = (UiModeManager) c.getSystemService(Context.UI_MODE_SERVICE);
if (uiModeManager.getCurrentModeType() == Configuration.UI_MODE_TYPE_CAR) {
LogHelper.d(TAG, "Running in Car mode");
return true;
} else {
LogHelper.d(TAG, "Running on a non-Car mode");
return false;
}
}
</pre>
<h2 id="implement_browser">Build a Browser Service</h2>