Here are the answers to some common questions about using voice actions.
Do actions work from browsers like Chrome?
Actions currently work from the Google app on Android.
What kinds of user input do actions support?
Actions work with both typed and voice input.
Do actions work on any device?
If your app defines the corresponding intent filter for an action, the action should work on various devices like phones, tablets, and watches.
How do I use voice on Android?
Refer to Use your voice on Android and Search Tips and Tricks.
Which locales support system actions? Can I have my app listen to a subset of locales?
System actions are supported in English, French, Italian, German, Spanish, Japanese, Korean, Portuguese, and Russian, independent of the country. You have to listen to the intent for all locales.
Will the intent sent to my app change over time? If so, how will I be notified?
Intents may gain more extras over time. You should periodically check the System Actions page and the Common Intents page.