Introduction to Nearby

Introduction, examples and code about the new Nearby Messages API from Google.

Presented at Android Talks #1, Coimbra, Portugal.

Transcript

1. Introduction to Nearby The new Nearby Messages API from Google By Sérgio and Bruno from Bloco
2. Overview • What? • How? • Examples • Show me the code!
3. What is Nearby Messages?
7. Main features • Works on Android, iOS and beacons • Apps can publish/subscribe to messages • Up until 100 meters range, or just earshot
8. Limitations • Needs Internet! • Small messages (recommended 3KB or less) • Not for sensitive data • Only between the same apps • Not on the background (consumes a lot of battery)
9. How does it work?
11. Technologies • Bluetooth & BLE • Wi-Fi • Sound (Inaudible) These may change in the future...
12. Internal flow 1. Publisher sends a Message to Google and gets a token 2. Subscriber just asks Google for a token 3. Publisher & Subscriber broadcast tokens (using techs) 4. When they “hear” other tokens, they let Google know 5. Google delivers the message to the Subscriber
13. Examples
14. Real applications
15. By Google: Chromecast guest mode
16. By Google: Nearby Players
17. By Google: Tone
18. Edging Pro - share playlists
19. PocketCasts - Sharing podcasts
20. Trulia - sharing house-hunting boards
21. What else can we do it with?
22. Let your imagination fly - Social
23. Let your imagination fly - Business
24. Let your imagination fly - Gaming
25. Let your imagination fly - Streetpass Over 50 games • Sharing scores • Unlocking content • Exchange items • ...
26. Code
27. Project Configuration apply plugin: 'android' ... dependencies { compile 'com.google.android.gms:play-services:8.1.0' }
28. Project Configuration <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.nearby"> <application ... > <meta-data android:name="com.google.android.nearby.messages.API_KEY" android:value="API_KEY"/> <activity … > </activity> </application> </manifest>
29. Client mGoogleApiClient = new GoogleApiClient.Builder(this) .addApi(Nearby.MESSAGES_API) .addConnectionCallbacks(this) .addOnConnectionFailedListener(this) .build();
30. Publish // Publish bytes to send String helloWorld = "Hello World!"; mMessage = new Message(helloWorld.getBytes()); Nearby.Messages.publish(mGoogleApiClient, mMessage);
31. Subscribe mMessageListener = new MessageListener() { @Override public void onFound(Message message) { Log.i(TAG, "Found message: " + message); } @Override public void onLost(Message message) { super.onLost(message); Log.i(TAG, "Lost message: " + message); } };
32. Subscribe Nearby.Messages.subscribe(mGoogleApiClient, mMessageListener);
33. Strategy strategy = new Strategy.Builder() .setDiscoveryMode(Strategy.DISCOVERY_MODE_SCAN) .setDistanceType(Strategy.DISTANCE_TYPE_EARSHOT ) .build();
34. Best Practices • Battery! • Wait for user actions • Show users what is going on • Well defined stop
35. Resources • Google Developers • https://developers.google.com/nearby/ • Nearby Messages (100 days of Google Dev) • https://www.youtube.com/watch?v=hultDpBS22s • Getting Close With Android Nearby • http://fragmentedpodcast.com/episodes/17/
36. Let’s try it!
37. Start your Trello apps • On our side
38. Introduction to Nearby @sdsantos @bffcorreia www.bloco.io hello@bloco.io