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
   

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2. APP
   “Separating logical components of your
   app project into discrete modules”
   2
   

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3. WHY?
   3
   

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4. WHY?
   × Cleaner codebase
   4
   

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5. WHY?
   × Cleaner codebase
   × Separation of concerns
   5
   

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6. WHY?
   × Cleaner codebase
   × Separation of concerns
   × Faster build times
   6
   

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7. WHY?
   × Cleaner codebase
   × Separation of concerns
   × Faster build times
   × Dynamic delivery
   7
   

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8. WHY?
   × Cleaner codebase
   × Separation of concerns
   × Faster build times
   × Dynamic delivery
   × App Bundles
   8
   

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9. When?
   9
   

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10. WHEN?
    start?
    10
    

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11. WHEN?
    start? middle?
    11
    

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12. WHEN?
    start? middle?
    middle?
    
    12
    

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13. WhO?
    13
    

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14. YOU, SITTING IN THIS TALK?
    14
    

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15. WHERE?
    15
    

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16. IT DEPENDS!
    16
    

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17. ZOLA APP
    17
    

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18. ZOLA APP
    18
    

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19. HOW?
    19
    

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20. dYNAMIC
    FEATURE
    MODULES
    20
    

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21. dYNAMIC
    FEATURE
    MODULES
    21
    

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22. dYNAMIC
    FEATURE
    MODULES
    22
    

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23. ARCHITECTURE - IN THE BEGINNING
    23
    :app
    

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24. ARCHITECTURE - MULTIPLE MODULES (FIRST PASS)
    24
    :database
    :app
    

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25. ARCHITECTURE - MULTIPLE MODULES (FIRST PASS)
    25
    :database
    :order
    :lead :service :installation
    :app
    :inventory
    

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26. ARCHITECTURE - MULTIPLE MODULES (SECOND PASS)
    26
    :database
    

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27. ARCHITECTURE - MULTIPLE MODULES (SECOND PASS)
    27
    :database
    :core
    

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28. ARCHITECTURE - MULTIPLE MODULES (SECOND PASS)
    28
    :database :test_shared
    :core
    

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29. ARCHITECTURE - MULTIPLE MODULES (SECOND PASS)
    29
    :database
    :core :app
    :test_shared
    

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30. ARCHITECTURE - MULTIPLE MODULES (SECOND PASS)
    30
    :database
    :order
    :lead :service :installation
    :core
    :inventory
    :app
    :test_shared
    

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31. MANIFEST.XML FILE
    dist:instant="false"
    dist:onDemand="false"
    dist:title="@string/title_dynamic_feature">
    
    
    31
    

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32. MANIFEST.XML FILE - INTENT FILTER
    android:name=".DynamicFeatureActivity">
    
    
    
    
    32
    

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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
    

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34. 34
    SETTINGS.GRADLE FILE (ROOT)
    include ':app', ':dynamic_feature'
    

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35. 35
    BUILD.GRADLE FILE (APP)
    dynamicFeatures = [":dynamic_feature"]
    

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36. 36
    CORE_TEST_DEPEndencies.GRADLE FILE (ROOT)
    apply from: '../core_test_dependencies.gradle'
    

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37. R class
    import com.offgrid.electric.confetti.R
    import com.offgrid.electric.confetti.features.order.R as orderR
    37
    

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38. R class
    override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    setContentView(orderR.layout.activity_customer_edit)
    38
    

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39. CONTINUOUS INTEGRATION
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40. ANY GOTCHAS?
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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”
    

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42. APOLLO GRAPHQL
    42
    sourceSets {
    main {
    java.srcDirs += ['src/main/graphql']
    }
    }
    

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43. APOLLO GRAPHQL
    43
    apollo {
    customTypeMapping = ["DateTime": "java.util.Date"]
    schemaFilePath = "../../com/my/example/schema.json"
    outputPackageName = "com.my.example.features.feature"
    }
    

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44. DEPENDENCY INJECTION with dagger - thE problem
    44
    http://adavis.info/2019/06/dagger-multibinding-in-dynamic-feature-modules.html
    

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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 MapProvider>
    ) : JobCreator {
    override fun create(tag: String): Job? = jobs[tag]?.get()
    }
    

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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
    ...
    

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47. DEPENDENCY INJECTION with dagger - thE problem
    47
    http://adavis.info/2019/06/dagger-multibinding-in-dynamic-feature-modules.html
    

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48. DEPENDENCY INJECTION with dagger - the solution
    48
    http://adavis.info/2019/06/dagger-multibinding-in-dynamic-feature-modules.html
    

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49. 49
    Localization - l10n
    Handling multiple string.xml files while
    using a translation tool?
    

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50. Unit tests
    50
    

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51. Unit tests
    51
    

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52. DISTRIBUTION
    52
    

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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
    

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54. THANKS!
    Moyinoluwa Adeyemi
    @moyheen
    54
    

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