This is implemented by the Locale Google Voice Plug-in, available on the Android Market.

This is supported in Locale 1.0.5.

Good news!

Android 4.0 finally grants apps official access the built-in calendar, so we’re planning to support this with a new Calendar condition. This new Calendar condition will be Android 4.0+ only.

As a general design principle, Locale only has features that Android officially supports (for the developers out there, we only use public APIs). This ensures that Locale works reliably across different versions of Android and different Android devices. For those without Android 4.0 (or those looking to live on the edge), there are some third-party plug-ins that implement Calendar condition functionality. These plug-ins are using undocumented Android APIs, and may therefore not work on all devices or may break when new versions of Android are released. Anyway, here are links to these plug-ins on the Android Market:

https://market.android.com/details?id=org.acm.steidinger.calendar.localePlugin

https://market.android.com/details?id=com.DroidMunkey.LocaleCalendarConditions

The Locale Media Volume Plug-in is available for free on the Android Market here https://market.android.com/details?id=com.twofortyfouram.locale.setting.media_volume

For those who are looking for Voice or Alarm volume settings, I’ve created two new requests. Please cast your votes there.

Voice Volume Setting http://locale.uservoice.com/forums/5655-locale-feedback/suggestions/450512-voice-volume-setting

Alarm Volume Setting http://locale.uservoice.com/forums/5655-locale-feedback/suggestions/450514-alarm-volume-setting

This is now supported in Locale 1.0. The Brightness setting now has an option to choose manual or auto brightness. If manual brightness is selected, then Locale will disable auto brightness so that the brightness can be adjusted.

Locale 1.0 is available on the Android Market today in countries that support paid apps. Full release notes are here: http://www.twofortyfouram.com/notes.html

This is now supported with the combination of Locale 1.0 and the “Locale Dock Plug-in”, both of which are available on the Android Market in countries that support paid apps.

Locale 1.0 supports plug-in conditions, so many more exciting features are coming soon :)

Actually, I think there’s a better way to organize this:

I’m marking this feature request as complete, as there are two ways currently to detect when the phone is in a car: a car dock condition or a Bluetooth condition, both of which are available now as plug-ins on the Android Market.

In order to have the votes correctly tallied, created a new request for a speed condition. If you want a speed condition, vote here:

http://feedback.twofortyfouram.com/forums/5655-locale-feedback/suggestions/884809-speed-condition

Android 2.0 finally adds APIs that would allow apps like Locale to implement a “Bluetooth Condition.” If this were implemented, it would only be available on Android 2.0 phones.

Update: There are some Android bugs that will prevent this from being implemented for the time being. Specifically, we’ve found that Bluetooth will periodically crap out until the phone is rebooted.