Les AsyncTasks

Transcript

1. Les AsyncTasks
2. Plan L’AsyncTask Les limites Android c’est du java non? La solution magique Bonus
3. Un passionné d’android #nexus #startup #ios #java #play! #scala #ps3 #pes #techno #android #devops #BARCA #photos #google #api twitter: @soulesidibe gplus: plus.google.com/+souleymanesidibe
4. L’AsyncTask
5. • Traitement en background et mise a jour du UI • Pas besoin de toucher aux Threads! AsyncTask.java
6. Pourquoi? AsyncTask.java
7. Pourquoi? • Ne pas bloquer le UI Thread! AsyncTask.java
8. Demo
9. Les limites
10. mAsync.cancel(true);
12. YourAsyncTask1 task1 = new YourAsyncTask1(); task1.execute(params); YourAsyncTask2 task2 = new YourAsyncTask2(); task2.execute(params); Question: Serial or parallel?
13. Android c’est du java non?
14. Le framework Executor Executor executor = Executors.newSingleThreadExecutor(); executor.execute(new MyRunnable());
15. Le framework Executor Executor executor = Executors.newSingleThreadExecutor(); executor.execute(new MyRunnable()); ExecutorService execute = Executors.newSingleThreadExecutor(); Future<Integer> future = execute.submit(new MonCallable());
16. Le framework Executor Executor executor = Executors.newSingleThreadExecutor(); executor.execute(new MyRunnable()); ExecutorService execute = Executors.newSingleThreadExecutor(); Future<Integer> future = execute.submit(new MonCallable()); ScheduledExecutorService execute = Executors. newSingleThreadScheduledExecutor(); execute.scheduleAtFixedRate(new MonRunnable(), 0, 1, TimeUnit.SECONDS);
17. La solution magique
18. Fragment Activity
19. Fragment Activity Thread in progress
20. Fragment Activity Thread Done
21. Fragment Activity Thread Done BUS POST MyEvent
22. EventB MyEvent Thread Done BUS POST MyEvent MyEvent EventA EventB EventA Subscribe Subscribe Subscribe
23. Event Bus Otto (goo.gl/sWxXY) EventBus (goo.gl/nAEW6) rxJava (goo.gl/TeWxWr)
24. Otto • Square (goo.gl/VlqRcA) • guava-based event bus • Open Source • easy to use
25. Otto
26. Demo
27. Bonus
28. YourAsyncTask1 task1 = new YourAsyncTask1(); task1.executeOnExecutor(executor, params); YourAsyncTask2 task2 = new YourAsyncTask2(); task2.executeOnExecutor(executor, params); Astuce
29. Communication entre Composants • Activity - Fragment • Fragment - Fragment Otto, c’est doux!
30. Communication entre Composants Activity Fragment A Fragment B BUS
31. Links • #doc AsyncTask (goo.gl/MRbjQD) • #post The dark side of AsyncTask (goo. gl/mm8IVR) • #tuto Le Framework Executor(goo. gl/MCJLq4) • #talk Android Bad Practices : comment foirer son app(goo.gl/Ix8Jsn)
32. MERCI!