How to Love Your Developers Like Your Customers?

In this talk I'll show how you can increase developer productivity of your Android Teams by adding simple debug features to your app, hacking Gradle and Android Studio to turn your Devs into Super Heroes who ship much better products faster than ever.

Everybody talks about Design, Architectures, Libraries, and whatnot, but, what we often forget is that most of the times quick wins for us as developers can be much more beneficial than tackling large refactors to use the latest technologies available so if we apply the 80-20 rule to our development workflow we can achieve so much more.
People with any level of android experience can see this talk.

Transcript

1. HOW TO LOVE YOUR DEVELOPERS LIKE YOUR CUSTOMERS? Ishan Khanna Android @ Booking #droidkaigi @droidchef
2. OUTLINE 1. INSPIRATION FOR THE TALK 2. DEBUG FEATURES 3. COMMON SCENARIOS 4. LEVERAGING THE POWER OF OPEN SOURCE 5. A COOL DEBUGGING TRICK #droidkaigi @droidchef
3. INSPIRATION FOR THE TALK #droidkaigi @droidchef
4. “DEBUG FEATURES” WHAT ARE THEY? #droidkaigi @droidchef
5. WHO ARE THEY FOR? DEVELOPERS QUALITY ASSURANCE TESTERS PRODUCT OWNERS DESIGNERS
6. SCENARIO 1 THE SERVER URLs #droidkaigi @droidchef
7. PROD DEV-1 DEV-2 DEV-3 DEV-4 ANDROID APP
8. Retrofit retrofit = new Retrofit.Builder() .baseUrl("https://dev-2.booking.com/") .build();
9. Retrofit retrofit = new Retrofit.Builder() .baseUrl("https://dev-2.booking.com/") .build();
10. PROD DEV-1 DEV-2 DEV-3 DEV-4 ANDROID APP
11. Retrofit retrofit = new Retrofit.Builder() .baseUrl("https://dev-3.booking.com/") .build();
13. SCENARIO 2 THE COPIES #droidkaigi @droidchef
14. SEARCH RESULTS IN ENGLISH
15. SEARCH RESULTS IN JAPANESE
16. SIDE BY SIDE COMPARISON
18. SCENARIO 3 NETWORK THROTTLING #droidkaigi @droidchef
19. public class NetworkThrottlingInterceptor implements Interceptor { private static final AtomicLong failRequestCount = new AtomicLong(Long.MAX_VALUE); private static boolean delayAllRequests = false; private static long minRequestDelay = 0; private static long maxRequestDelay = 0; private final Random random = new Random(4);
20. public Response intercept(Chain chain) throws IOException { long delay = minRequestDelay; if( minRequestDelay != maxRequestDelay ) { delay = (long) ((random.nextDouble() * (maxRequestDelay - minRequestDelay)) + minRequestDelay); } long end = System.currentTimeMillis() + delay; long now = System.currentTimeMillis(); while( now < end ) { try { Thread.sleep( end - now); } catch (InterruptedException e) { // Nothing to do here, timing controlled by outer loop. } now = System.currentTimeMillis(); } return chain.proceed(chain.request()); }
21. public static void delayAllRequests( long minRequestDelay, long maxRequestDelay ) { if( minRequestDelay == 0 && maxRequestDelay == 0 ) { delayAllRequests = false; } else { NetworkThrottlingInterceptor.minRequestDelay = minRequestDelay; NetworkThrottlingInterceptor.maxRequestDelay = maxRequestDelay; delayAllRequests = true; } }
22. public OkHttpClient configure(@NonNull OkHttpClient client) { client = super.configure(client); return client.newBuilder() .addNetworkInterceptor(new NetworkThrottlingInterceptor()) .addInterceptor(new SomeOtherInterceptor()) .build(); }
23. SCENARIO 4 UNAVAILABLE PLAY SERVICES #droidkaigi @droidchef
26. SCENARIO 5 DEBUG NOTIFICATIONS #droidkaigi @droidchef
27. APPLYING APP WIDE CHANGES • USE A LIBRARY CALLED PROCESS PHEONIX • WRITTEN BY JAKE WHARTON • https://github.com/JakeWharton/ProcessPhoenix #droidkaigi @droidchef
28. START THE DEFAULT ACTIVITY IN A NEW PROCESS ProcessPhoenix.triggerRebirth(context);
29. OR, IF YOU WANT TO LAUNCH WITH AN INTENT Intent nextIntent = //... ProcessPhoenix.triggerRebirth(context, nextIntent);
30. TO CHECK IF YOUR APP IS IN PHEONIX PROCESS, TO SKIP INITIALIZATION IN onCreate if (ProcessPhoenix.isPhoenixProcess(this)) { return; }
31. DON’T REINVENT THE WHEEL #droidkaigi @droidchef
32. LEVERAGE EXISTING OPEN SOURCE SOLUTIONS #droidkaigi @droidchef
33. SOME MUST HAVE OPEN SOURCE LIBRARIES IN YOUR PROJECT #droidkaigi @droidchef
34. STETHO • DEVELOPED BY FACEBOOK • https://facebook.github.io/stetho/
35. CHROME DEVTOOLS
36. NETWORK INSPECTION
37. DATABASE INSPECTION
38. VIEW HIERARCHY INSPECTION
39. JAVASCRIPT CONSOLE TO INTERACT WITH APP
40. INSTALLS IN ONE LINE OF CODE public class MyApplication extends Application { public void onCreate() { super.onCreate(); Stetho.initializeWithDefaults(this); } }
41. LEAK CANARY • DEVELOPED BY SQUARE • https://github.com/square/leakcanary
42. TIMBER • DEVELOPED BY JAKE WHARTON • https://github.com/JakeWharton/timber
43. MAKING THE MOST OF ANDROID STUDIO DEBUGGER @Override public void onBindViewHolder(ViewHolder holder, final int position) { final String name = values.get(position); holder.txtHeader.setText(name); holder.txtFooter.setText("Footer: " + name); }
44. @Override public void onBindViewHolder(ViewHolder holder, final int position) { final String name = values.get(position); holder.txtHeader.setText(name); if (position % 3 == 0) { holder.txtHeader.setTextColor(Color.GREEN); } holder.txtFooter.setText("Footer: " + name); }
46. CREATE A NEW RUN CONFIG
54. GO SPREAD SOME #droidkaigi @droidchef