App Modularization: From Zero to Hero

As your app becomes more complex and build speeds begin to increase, app modularization starts to enter the conversation. Does the concept seem fuzzy to you? Or, do you know what it means in theory but have no clue where to start in your apps?

In this talk, you will get an answer to the Five Ws on app modularization - what, why, when, where and how. You'll learn:

What Dynamic Feature Modules are and how that relates to modularization
How to identify features to modularize and all the steps to take in the process
All the pain points to look out for based on our experience

You'll get all the information you need to modularize your apps and reap the benefits!

Transcript

1. APP MODULARIzation: FROM ZERO TO HERO! Moyinoluwa Adeyemi @moyheen
2. APP “Separating logical components of your app project into discrete modules” 2
3. WHY? 3
4. WHY? × Cleaner codebase 4
5. WHY? × Cleaner codebase × Separation of concerns 5
6. WHY? × Cleaner codebase × Separation of concerns × Faster build times 6
7. WHY? × Cleaner codebase × Separation of concerns × Faster build times × Dynamic delivery 7
8. WHY? × Cleaner codebase × Separation of concerns × Faster build times × Dynamic delivery × App Bundles 8
9. When? 9
10. WHEN? start? 10
11. WHEN? start? middle? 11
12. WHEN? start? middle? middle? 12
13. WhO? 13
14. YOU, SITTING IN THIS TALK? 14
15. WHERE? 15
16. IT DEPENDS! 16
17. ZOLA APP 17
18. ZOLA APP 18
19. HOW? 19
20. dYNAMIC FEATURE MODULES 20
21. dYNAMIC FEATURE MODULES 21
22. dYNAMIC FEATURE MODULES 22
23. ARCHITECTURE - IN THE BEGINNING 23 :app
24. ARCHITECTURE - MULTIPLE MODULES (FIRST PASS) 24 :database :app
25. ARCHITECTURE - MULTIPLE MODULES (FIRST PASS) 25 :database :order :lead :service :installation :app :inventory
26. ARCHITECTURE - MULTIPLE MODULES (SECOND PASS) 26 :database
27. ARCHITECTURE - MULTIPLE MODULES (SECOND PASS) 27 :database :core
28. ARCHITECTURE - MULTIPLE MODULES (SECOND PASS) 28 :database :test_shared :core
29. ARCHITECTURE - MULTIPLE MODULES (SECOND PASS) 29 :database :core :app :test_shared
30. ARCHITECTURE - MULTIPLE MODULES (SECOND PASS) 30 :database :order :lead :service :installation :core :inventory :app :test_shared
31. MANIFEST.XML FILE <dist:module dist:instant="false" dist:onDemand="false" dist:title="@string/title_dynamic_feature"> <dist:fusing dist:include="true" /> </dist:module> 31
32. MANIFEST.XML FILE - INTENT FILTER <activity android:name=".DynamicFeatureActivity"> <intent-filter> <action android:name="android.intent.action.VIEW" /> </intent-filter> </activity> 32
33. START ACTIVITY FROM A DIFFERENT MODULE fun goToTasks(context: Context) = Intent(Intent.ACTION_VIEW).apply { setClassName(context.packageName, "$BASE_PACKAGE.features.service.TasksActivity") } 33
34. 34 SETTINGS.GRADLE FILE (ROOT) include ':app', ':dynamic_feature'
35. 35 BUILD.GRADLE FILE (APP) dynamicFeatures = [":dynamic_feature"]
36. 36 CORE_TEST_DEPEndencies.GRADLE FILE (ROOT) apply from: '../core_test_dependencies.gradle'
37. R class import com.offgrid.electric.confetti.R import com.offgrid.electric.confetti.features.order.R as orderR 37
38. R class override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(orderR.layout.activity_customer_edit) 38
39. CONTINUOUS INTEGRATION 39
40. ANY GOTCHAS? 40
41. APOLLO GRAPHQL ‍♀ 41 “Couldn’t find some schema files for the variant stagingDebug. Please ensure a valid schema.json file exists under the variant source sets”
42. APOLLO GRAPHQL 42 sourceSets { main { java.srcDirs += ['src/main/graphql'] } }
43. APOLLO GRAPHQL 43 apollo { customTypeMapping = ["DateTime": "java.util.Date"] schemaFilePath = "../../com/my/example/schema.json" outputPackageName = "com.my.example.features.feature" }
44. DEPENDENCY INJECTION with dagger - thE problem 44 http://adavis.info/2019/06/dagger-multibinding-in-dynamic-feature-modules.html
45. DEPENDENCY INJECTION with dagger - thE problem 45 http://adavis.info/2019/06/dagger-multibinding-in-dynamic-feature-modules.html class ConfettiJobCreator @Inject constructor( private val jobs: @JvmSuppressWildcards Map<String, Provider<Job>> ) : JobCreator { override fun create(tag: String): Job? = jobs[tag]?.get() }
46. DEPENDENCY INJECTION with dagger - thE problem 46 http://adavis.info/2019/06/dagger-multibinding-in-dynamic-feature-modules.html ... @Binds @IntoMap @StringKey(SomeJob.JOB_TAG) internal abstract fun bindSomeJob(job: SomeJob): Job ...
47. DEPENDENCY INJECTION with dagger - thE problem 47 http://adavis.info/2019/06/dagger-multibinding-in-dynamic-feature-modules.html
48. DEPENDENCY INJECTION with dagger - the solution 48 http://adavis.info/2019/06/dagger-multibinding-in-dynamic-feature-modules.html
49. 49 Localization - l10n Handling multiple string.xml files while using a translation tool?
50. Unit tests 50
51. Unit tests 51
52. DISTRIBUTION 52
53. Credits × Presentation template by SlidesCarnival × http://adavis.info/2019/06/dagger-multibinding-in-dynamic-feature-modul es.html × https://github.com/android/plaid × https://codelabs.developers.google.com/codelabs/your-first-dynamic-app × https://medium.com/androiddevelopers/a-patchwork-plaid-monolith-to- modularized-app-60235d9f212e 53
54. THANKS! Moyinoluwa Adeyemi @moyheen 54