Building the Fabric SDKs - #MBLTDev (30 min)

Transcript

1. dev.twitter.com @tsmith Building the Fabric SDKs Ty Smith Sr. Android Engineer
6. Fabric Sample App Cannonball Open source for iOS & Android: github.com/twitterdev
7. Powerful Lightweight
8. Powerful
9. Ease of Integration
10. Ease of Integration Fabric.with(this, new Crashlytics());
11. Extensible
12. Extensible Crashlytics.start(this);
13. Extensible Crashlytics.start(this, 5); Crashlytics.setListener(createCrashlyticsListener()); Crashlytics.setPinningInfo(createPinningInfoProvider()) Crashlytics.getInstance().setDebugMode(true);
14. Extensible Crashlytics.setListener(createCrashlyticsListener()); Crashlytics.setPinningInfo(createPinningInfoProvider()); Crashlytics.getInstance().setDebugMode(true); Crashlytics.start(this, 5);
15. Extensible Crashlytics.start(this, delay, listener, pinningInfo, debugMode);
16. Extensible Crashlytics.start(this, 0, null, null, null, true);
17. Fluent Pattern Crashlytics crashlytics = new Crashlytics.Builder() .delay(1) .listener(createCrashlyticsListener()) .pinningInfo(createPinningInfoProvider()) .build(); Fabric.with(this, crashlytics);
18. Fluent Pattern Fabric.with(new Fabric.Builder(this) .kits(new Crashlytics()) .debuggable(true) .logger(new DefaultLogger(Log.VERBOSE)) .looper(getCustomLooper()) .executor(getCustomExecutorService()) .build());
19. Extensible Classes class MyApiClient extends TwitterApiClient { interface MyService { @GET(“/1.1/statuses/show.json”) Tweet getTweet(@Query(“id”) int id); } MyService getMyService() { return getService(MyService.class); } }
20. Gracefully Degrade
21. Gracefully Degrade if (TextUtils.isEmpty(apiKey) if (debuggable){ throw new IllegalArgumentException( “apiKey is null!"); } else { return null; } }
22. Minimizing Permissions
23. Minimizing Permissions <uses-permission android:name="android.permission.INTERNET"/>
24. Minimizing Permissions Crashlytics.setUserEmail(“appuser@domain.com”);
25. Permissions: Runtime Detection protected boolean canCheckNetworkState() { String permission = Manifest.permission.ACCESS_NETWORK_STATE; int result = context.checkCallingOrSelfPermission(permission); return (result == PackageManager.PERMISSION_GRANTED); }
26. Multiple Application Types
27. Multiple Application Types package com.example; import android.app.Service; public class MyService extends Service { }
28. UI from Application Context WeakReference<Activity> currentActivity = new WeakReference<Activity>(); @TargetApi(Build.VERSION_CODES.ICE_CREAM_SANDWICH) void registerLifecycleCallbacks() { if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.FROYO) { final Application app = ((Application)context); app.registerActivityLifecycleCallbacks( new ActivityLifecycleCallbacks() { @Override public void onActivityResumed(Activity activity) { currentActivity.set(activity); } }); } }
29. Powerful SDKs Ease of Integration Extensibility Support all app types Permission detection
30. Lightweight
31. Binary Size
32. Binary Size
33. 3rd Party Library Mindfulness
34. 3rd Party Library Mindfulness
35. How big are Fabric AARs? Fabric: 190kb Crashlytics: 90kb Beta: 13kb Answers: 20kb Twitter API & SSO: 296kb Tweet UI: 120kb Tweet Composer: 5kb Digits: 236kb
36. 3rd Party Library Mindfulness PROTOBUF KB OURS KB
37. Dalvik Method Count
38. Dalvik Method Count >./gradlew assemble … Unable to execute dex: method ID not in [0, 0xffff]: 65536 Conversion to Dalvik format failed: Unable to execute dex: method ID not in [0, 0xffff]: 65536
39. Dalvik Method Count > git clone git@github.com:mihaip/dex-method-counts.git > cd dex-method-counts > ant jar > ./dex-method-counts path/to/App.apk Read in 65490 method IDs. <root>: 65490 : 3 accessibilityservice: 6 bluetooth: 2 content: 248 pm: 22 res: 45 ... com: 53881 adjust: 283 sdk: 283
40. Minimize Network Usage
41. Network Usage 10X SMALLER 100X FASTER XML PROTOBUF
42. Reduce Startup Time
43. Startup Time Thread.start(); Executors.newSingleThreadExecutor();
44. Startup Time class MyThreadFactory implements ThreadFactory { @Override public Thread newThread(Runnable runnable) { final Thread thread = new Thread(runnable); thread.setPriority(Process.THREAD_PRIORITY_BACKGROUND); return thread; } }
45. Lightweight SDKs Binary size 3rd party library mindfulness Dalvik Method Count Network usage Startup time
46. Lightweight Powerful
47. Questions? dev.twitter.com @tsmith