You know that feeling when you just need a quick answer, a simple confirmation, or a little bit of interaction without diving deep into an app? For so many of those everyday moments, the best response is often the simplest. And that's precisely where Android widgets, when brought into the Google Assistant experience, truly shine.
Think of widgets as those handy little windows into your apps, the ones you might already have on your home screen or lock screen. Now, imagine them popping up right when you need them, thanks to Google Assistant. It's like having a helpful friend who knows just what you're looking for. This integration, powered by 'App Actions' and the 'Widgets Extension' library, is designed to make your apps more accessible and useful than ever before.
So, how does this magic happen? Well, there are a couple of ways you can summon these helpful widget previews. You can be direct, of course. Just say, "Hey Google, show me the [Your App Name] widget." Assistant will then display it, usually with a friendly little intro like, "[Your App Name] says, here's a widget." This works out of the box, which is pretty neat, but it does mean you need to know the widget's name beforehand.
But here's where it gets really clever: using 'intent execution.' This is where your widgets become proactive. Instead of just waiting to be asked, they can respond to your natural language queries. For instance, if you're using a fitness app and ask, "Ok Google, how many miles have I run this week?" – and if that app is set up to handle that specific query – your fitness app's widget could appear, showing you that exact information. It's a much smoother, more intuitive way to get what you need.
Beyond just making widgets easier to find, this integration offers some fantastic benefits. Your widget can actually receive specific pieces of information, called 'parameters,' that Google Assistant pulls from your voice command. This means the widget can present a response tailored precisely to your request. Plus, you can even customize the spoken confirmation Assistant gives before showing the widget, making the whole interaction feel more personal. And, a really neat feature: Assistant will offer a button to 'pin' that widget to your launcher, so you can keep that helpful view handy even after the Assistant session ends. This pinning capability is thanks to that handy Widgets Extension library.
Implementing this is more about connecting the dots than building something from scratch. You'll first need a standard Android widget. Then, in your app's shortcuts.xml file, you'll define a 'capability' for a specific 'intent' (like getting exercise data) and link it to your widget using an <app-widget> element. You'll also need to make sure your widget is updated to understand and display the parameters passed to it. The Widgets Extension library is key here, as it helps Assistant pass along the intent name and those crucial parameters to your widget.
Looking at the structure, within your shortcuts.xml, you'll find <capability> elements. Inside these, you can define <app-widget> as an 'action.' You'll specify an android:identifier (a unique ID for this action) and android:targetClass (the name of your widget's provider class). You can also map parameters from the user's query to your widget using <parameter> tags, and even declare custom text-to-speech (TTS) prompts with <extra> tags.
For example, if you're setting up a capability for actions.intent.GET_EXERCISE_OBSERVATION, you might have an <app-widget> pointing to com.exampleapp.providers.exampleAppWidgetProvider. You could map the exerciseObservation.aboutExercise.name parameter to a key like exercisename in your widget, and set hasTts to true to enable a custom spoken intro. You can even have multiple <app-widget> elements within a single capability, allowing Assistant to choose the best widget to display based on the user's specific request.
When it comes to actually getting those parameters within your widget code, it's quite straightforward. Your AppWidgetProvider class will receive options when the widget is updated. You can access a Bundle containing the BII name and any parameters passed by Assistant. The AppActionsWidgetExtension class provides constants like EXTRA_APP_ACTIONS_BII and EXTRA_APP_ACTIONS_PARAMS to help you retrieve this information. Once you have the parameters, like a dropoff location for a ride-sharing app, you can then build your widget's RemoteViews to display the relevant information. It’s about making your app’s data readily available, right when and where you need it, through the power of your voice and the convenience of Google Assistant.
