Introducing the Awareness API, an easy way to make your apps context aware - Google I/O 2016

いままで

Where you are

• Fused Location
• Places API
• Geofencing

What you're doing

• Activity Recognition
• Google Fit Platform
• Sensors Platform

What's around you

• Nearby Messages
• Nearby Connections
• Nearby Notifications

それぞれの API を組み合わせて使うのが大変だった。 例えば、複数の条件（Geofencingの中にいて、かつ車に乗っているなど）の組み合わせで処理のトリガーとするのが大変だった。電池への影響も考えないといけない。 そこで、組み合わせて使うのが簡単になる Awareness API をリリースした。

Awareness API

unified sensing platform

7 context types natively supported

• Location (Latitude and longitude)
• Places ("Starbucks", Coffee shop)
• Beacons (What beacons or devices are nearby?)
• Time (Local time)
• Activity (Walking, running, biking, or driving)
• Headphones (Headphones plugged or not?)
• Weather (Current temperature and conditions)

Fance API

Callback style

view plainprint?

1. AreanessFence startDriving = DetectedActivityFence.staring(  
2.  DetectedActivityFence.IN_VEHICLE);  
3.   
4. AwarenessFence areaAroundStore = LocationFence.in(  
5.  STORE_LATITUDE, STORE_LONGITUDE,  
6.  1000 /* radius in meters */, 0L /* dwell time */);  
7.   
8. AwarenessFence duringDriving = DetectedActivityFence.during(  
9.  DetectedActivityFence.IN_VEHICLE);  
10.   
11. AwarenessFence openHours = TimeFence.inDailyInterval(  
12.  TimeZone.getDefault(),  
13.  10 * HOURS_IN_MILLIS,  
14.  18 * HOURS_IN_MILLIS);  
15.   
16. AwarenessFence drivingNearStore = AwarenessFence.and(  
17.     areaAroundStore,  
18.     duringDriving,  
19.     openHours);  
20.   
21. // Create FenceUpdateRequest and register.  
22. FenceUdateRequest fenceUpdateRequest = new FenceUpdateRequest.Builder()  
23.  .addFence("startDriving", startDriving, pendingIntent)  
24.  .addFence("drivingNearStore", drivingNearStore, pendingIntent)  
25.  .build();  
26.   
27. Awareness.FenceApi.updateFences(googleApiClient, fenceUpdateRequest);  

AreanessFence startDriving = DetectedActivityFence.staring( DetectedActivityFence.IN_VEHICLE); AwarenessFence areaAroundStore = LocationFence.in( STORE_LATITUDE, STORE_LONGITUDE, 1000 /* radius in meters */, 0L /* dwell time */); AwarenessFence duringDriving = DetectedActivityFence.during( DetectedActivityFence.IN_VEHICLE); AwarenessFence openHours = TimeFence.inDailyInterval( TimeZone.getDefault(), 10 * HOURS_IN_MILLIS, 18 * HOURS_IN_MILLIS); AwarenessFence drivingNearStore = AwarenessFence.and( areaAroundStore, duringDriving, openHours); // Create FenceUpdateRequest and register. FenceUdateRequest fenceUpdateRequest = new FenceUpdateRequest.Builder() .addFence("startDriving", startDriving, pendingIntent) .addFence("drivingNearStore", drivingNearStore, pendingIntent) .build(); Awareness.FenceApi.updateFences(googleApiClient, fenceUpdateRequest);

view plainprint?

1. void onReceive(Context context, Intent intent) {  
2.  FenceState fenceState = FenceState.extract(intent);  
3.  if (fenceState.getFenceKey().equals("startDriving")) {  
4.    if (fenceSate.getCurrentState() == FenceState.TRUE) {  
5.        // show map apps  
6.    }  
7.  } else if (fenceState.getFenceKey().equals("drivingNearStore")) {  
8.    if (fenceSate.getCurrentState() == FenceState.TRUE) {  
9.        // show reminder  
10.    }  
11.  }  
12. }  

void onReceive(Context context, Intent intent) { FenceState fenceState = FenceState.extract(intent); if (fenceState.getFenceKey().equals("startDriving")) { if (fenceSate.getCurrentState() == FenceState.TRUE) { // show map apps } } else if (fenceState.getFenceKey().equals("drivingNearStore")) { if (fenceSate.getCurrentState() == FenceState.TRUE) { // show reminder } } }

Snapshot API

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1. PlacesResult placesResult = Awareness.SnapshotApi.getPlaces(googleApiClient).await();  
2.   
3. WeatherResult weatherResult = Awareness.SnapshotApi.getWeather(googleApiClient).await();  

PlacesResult placesResult = Awareness.SnapshotApi.getPlaces(googleApiClient).await(); WeatherResult weatherResult = Awareness.SnapshotApi.getWeather(googleApiClient).await();

Permission

• Location, Place, Beacon, Weather -> ACCESS_FINE_LOCATION
• Activity -> ACTIVITY_RECOGNITION
• Headphones -> no permission