Kotlin + RxJava2 + Dagger2 + Orma
+ Retrofit2 で作るAndroidアプリ at DroidKaigi 2017

Transcript

1. Kotlin + RxJava2 + Dagger2 + Orma
 + Retrofit2 Ͱ࡞ΔAndroidΞϓϦ

   @lvla0805

2. MWMB
   MWMB Ѫᖒ
   ๖ (Moyuru Aizawa) - Lead Kotlin engineer of

   Pairs Div. Eureka, Inc.

3. - Pairs - Couples - a member of IAC/Match Group

4. Agenda ‣ Sample Application ‣ ٕज़֓ཁ ‣ Kotlin ‣ RxJava

   ‣ Retrofit ‣ Orma ‣ Sample ‣ Client ‣ Database ‣ Repository ‣ Activity ‣ Dagger2

5. Sample Application

6. ‣ %SPJE,BJHJΞϓϦͷίϯ τϦϏϡʔλʔͷҰཡΛදࣔ͢ Δ͚ͩͷ؆୯ͳΞϓϦ Sample Application https://github.com/lvla/DroidKaigi2017Contributors

7. ‣ (JU)VC͔Βz%SPJE,BJHJ
   
   DPOGFSFODFBQQzͷίϯ τϦϏϡʔλʔΛऔಘ͢Δ
   ‣ ΦϑϥΠϯͰ΋ίϯτϦϏϡʔλʔΛදࣔͰ͖ΔΑ͏ʹσʔ λϕʔεʹอଘ
   ‣ ʜ ඞཁͳػೳ

8. ٕज़֓ཁ

9. ٕज़֓ཁ Languages Kotlin 1.1 Network Retrofit 2.1.0 OkHttp 3.6.0 O/R

   Mapper Orma 4.2.0 Reactive Programming RxJava 2.0.2 Dependency Injection Dagger 2.9

10. build.gradle(Ұ෦) apply plugin: 'kotlin-android' apply plugin: 'kotlin-kapt' android { dataBinding

    { enabled = true } } dependencies { // Databinding kapt 'com.android.databinding:compiler:2.3.0' // Orma compile "com.github.gfx.android.orma:orma:$ormaVersion" kapt "com.github.gfx.android.orma:orma-processor:$ormaVersion" // ReactiveX compile 'io.reactivex.rxjava2:rxjava:2.0.2' compile 'io.reactivex.rxjava2:rxandroid:2.0.1' // Retrofit compile "com.squareup.retrofit2:retrofit:$retrofitVersion" compile "com.squareup.retrofit2:converter-gson:$retrofitVersion" compile 'com.jakewharton.retrofit:retrofit2-rxjava2-adapter:1.0.0' compile "com.squareup.okhttp3:logging-interceptor:$okHttpVersion" // Dagger2 compile "com.google.dagger:dagger:$daggerVersion" kapt "com.google.dagger:dagger-compiler:$daggerVersion" }

11. Kotlin

12. ‣ JetBrains։ൃͷJVM, Android޲͚੩తܕ෇͚ݴޠ ‣ Javaͱͷ100%૬ޓӡ༻ੑ ‣ ܕਪ࿦ ‣ Null҆શ ‣

    ؔ਺Ϧςϥϧ Kotlin

13. class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) {

    … val message = "Clicked" button.setOnClickListener { textView.text = message } } } Kotlin

14. class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) {

    … val message = "Clicked" button.setOnClickListener { textView.text = message } } } Kotlin

15. class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) {

    … val message = "Clicked" button.setOnClickListener { textView.text = message } } } Kotlin

16. class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) {

    … val message = "Clicked" button.setOnClickListener { textView.text = message } } } Kotlin

17. class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) {

    … val message = "Clicked" button.setOnClickListener { textView.text = message } } } Kotlin

18. class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) {

    … val message = "Clicked" button.setOnClickListener { textView.text = message } } } Kotlin

19. RxJava

20. ‣ ϦΞΫςΟϒϓϩάϥϛϯάϑϨʔϜϫʔΫ ‣ ؂ࢹՄೳͳStreamΛ࢖ͬͨඇಉظॲཧ RxJava

21. RxJava val observable = Observable.create<Int> { subscriber -> intArray.forEach {

    subscriber.onNext(it) } subscriber.onComplete() } observable.subscribe( { num -> println(num) }, { throwable -> throwable.printStackTrace() }, { println("onCompleted") })

22. RxJava val observable = Observable.create<Int> { subscriber -> intArray.forEach {

    subscriber.onNext(it) } subscriber.onComplete() } observable.subscribe( { num -> println(num) }, { throwable -> throwable.printStackTrace() }, { println("onCompleted") })

23. RxJava val observable = Observable.create<Int> { subscriber -> intArray.forEach {

    subscriber.onNext(it) } subscriber.onComplete() } observable.subscribe( { num -> println(num) }, { throwable -> throwable.printStackTrace() }, { println("onCompleted") })

24. RxJava val observable = Observable.create<Int> { subscriber -> intArray.forEach {

    subscriber.onNext(it) } subscriber.onComplete() } observable.subscribe( { num -> println(num) }, { throwable -> throwable.printStackTrace() }, { println("onCompleted") })

25. RxJava val observable = Observable.create<Int> { subscriber -> intArray.forEach {

    subscriber.onNext(it) } subscriber.onComplete() } observable.subscribe( { num -> println(num) }, { throwable -> throwable.printStackTrace() }, { println("onCompleted") })

26. RxJava val observable = Observable.create<Int> { subscriber -> intArray.forEach {

    subscriber.onNext(it) } subscriber.onComplete() } observable.subscribe( { num -> println(num) }, { throwable -> throwable.printStackTrace() }, { println("onCompleted") })

27. RxJava val observable = Observable.create<Int> { subscriber -> intArray.forEach {

    subscriber.onNext(it) } subscriber.onComplete() } observable.subscribe( { num -> println(num) }, { throwable -> throwable.printStackTrace() }, { println("onCompleted") })

28. RxJava val observable = Observable.create<Int> { subscriber -> intArray.forEach {

    subscriber.onNext(it) } subscriber.onComplete() } observable.subscribe( { num -> println(num) }, { throwable -> throwable.printStackTrace() }, { println("onCompleted") })

29. RxJava val observable = Observable.create<Int> { subscriber -> intArray.forEach {

    subscriber.onNext(it) } subscriber.onComplete() } observable.subscribe( { num -> println(num) }, { throwable -> throwable.printStackTrace() }, { println("onCompleted") })

30. RxJava masterClient().fetch() .flatMap { loginClient.login() } .subscribeOn(Schedulers.io()) .observeOn(AndroidSchedulers.main()) .subscribe( {

    ... }, { ... }, { moveToMain() } )

31. RxJava masterClient().fetch() .flatMap { loginClient.login() } .subscribeOn(Schedulers.io()) .observeOn(AndroidSchedulers.main()) .subscribe( {

    ... }, { ... }, { moveToMain() } )

32. RxJava masterClient().fetch() .flatMap { loginClient.login() } .subscribeOn(Schedulers.io()) .observeOn(AndroidSchedulers.main()) .subscribe( {

    ... }, { ... }, { moveToMain() } )

33. RxJava masterClient().fetch() .flatMap { loginClient.login() } .subscribeOn(Schedulers.io()) .observeOn(AndroidSchedulers.main()) .subscribe( {

    ... }, { ... }, { moveToMain() } )

34. RxJava masterClient().fetch() .flatMap { loginClient.login() } .subscribeOn(Schedulers.io()) .observeOn(AndroidSchedulers.main()) .subscribe( {

    ... }, { ... }, { moveToMain() } )

35. Retrofit

36. ‣ Square։ൃͷType Safe HTTP Client ‣ OkHttpͰ௨৴Λߦ͍ɺJsonΛ೚ҙͷܕͰฦ٫ͯ͘͠Ε Δɻ ‣ RxJavaରԠ

    Retrofit

37. Retrofitͷੜ੒

38. Retrofit val retrofit = Retrofit.Builder() .client(OkHttpClient()) .baseUrl("https://api.github.com") .addCallAdapterFactory(RxJava2CallAdapterFactory.create()) .addConverterFactory(GsonConverterFactory.create()) .build()

39. Retrofit val retrofit = Retrofit.Builder() .client(OkHttpClient()) .baseUrl("https://api.github.com") .addCallAdapterFactory(RxJava2CallAdapterFactory.create()) .addConverterFactory(GsonConverterFactory.create()) .build()

40. Retrofit val retrofit = Retrofit.Builder() .client(OkHttpClient()) .baseUrl("https://api.github.com") .addCallAdapterFactory(RxJava2CallAdapterFactory.create()) .addConverterFactory(GsonConverterFactory.create()) .build()

41. Retrofit val retrofit = Retrofit.Builder() .client(OkHttpClient()) .baseUrl("https://api.github.com") .addCallAdapterFactory(RxJava2CallAdapterFactory.create()) .addConverterFactory(GsonConverterFactory.create()) .build()

42. Retrofit val retrofit = Retrofit.Builder() .client(OkHttpClient()) .baseUrl("https://api.github.com") .addCallAdapterFactory(RxJava2CallAdapterFactory.create()) .addConverterFactory(GsonConverterFactory.create()) .build()

43. Retrofit val retrofit = Retrofit.Builder() .client(OkHttpClient()) .baseUrl("https://api.github.com") .addCallAdapterFactory(RxJava2CallAdapterFactory.create()) .addConverterFactory(GsonConverterFactory.create()) .build()

    Gson, Jackson, Moshi...

44. Interface

45. Retrofit interface GitHubService { @GET("/repos/{owner}/{repo}/contributors") fun fetchContributors( @Path(“owner") owner: String,

    @Path(“repo") repository: String): Observable<List<Contributor>> }

46. Retrofit interface GitHubService { @GET("/repos/{owner}/{repo}/contributors") fun fetchContributors( @Path(“owner") owner: String,

    @Path(“repo") repository: String): Observable<List<Contributor>> }

47. Retrofit interface GitHubService { @GET("/repos/{owner}/{repo}/contributors") fun fetchContributors( @Path(“owner") owner: String,

    @Path(“repo") repository: String): Observable<List<Contributor>> }

48. Retrofit val gitHubService = retrofit.create(GitHubService::class.java) gitHubService.fetchContributors("Owner", "Repo") .subscribeOn(Schedulers.io()) .observeOn(AndroidSchedulers.mainThread()) .subscribe(

    { contributors -> show(contributors) }, { throwable -> throwable.printStackTrace() })

49. Retrofit val gitHubService = retrofit.create(GitHubService::class.java) gitHubService.fetchContributors("Owner", "Repo") .subscribeOn(Schedulers.io()) .observeOn(AndroidSchedulers.mainThread()) .subscribe(

    { contributors -> show(contributors) }, { throwable -> throwable.printStackTrace() })

50. Retrofit val gitHubService = retrofit.create(GitHubService::class.java) gitHubService.fetchContributors("Owner", "Repo") .subscribeOn(Schedulers.io()) .observeOn(AndroidSchedulers.mainThread()) .subscribe(

    { contributors -> show(contributors) }, { throwable -> throwable.printStackTrace() })

51. Retrofit val gitHubService = retrofit.create(GitHubService::class.java) gitHubService.fetchContributors("Owner", "Repo") .subscribeOn(Schedulers.io()) .observeOn(AndroidSchedulers.mainThread()) .subscribe(

    { contributors -> show(contributors) }, { throwable -> throwable.printStackTrace() })

52. ‣ HTTP௨৴ͳͲɺΠϕϯτ͕Ұճ͔͠ى͜Βͳ͍ετ ϦʔϜΛѻ͏৔߹͸ObservableΑΓSingleͷ͕ϕλʔ ‣ ࠓճ͸આ໌Λ؆ུԽ͢ΔͨΊʹObservableΛ࢖༻͠· ͨ͠ɻ TIPS

53. Orma

54. ‣ "OESPJE
    42-JUF%BUBCBTFΉ͚ͷ03.
    ‣ ίϯύΠϧ࣌ʹΞϊςʔγϣϯΛݩʹ$36%ͷϔϧύʔ ΫϥεΛੜ੒ͯ͘͠ΕΔɻ Orma

55. Tableఆٛ

56. Orma @Table data class Contributor( @PrimaryKey(auto = false) @Setter("name") val

    name: String, @Column @Setter("avatarUrl") val avatarUrl: String?, @Column @Setter("htmlUrl") val htmlUrl: String?, @Column @Setter("contributions") val contributions: Int )

57. Orma @Table data class Contributor( @PrimaryKey(auto = false) @Setter("name") val

    name: String, @Column @Setter("avatarUrl") val avatarUrl: String?, @Column @Setter("htmlUrl") val htmlUrl: String?, @Column @Setter("contributions") val contributions: Int )

58. Orma @Table data class Contributor( @PrimaryKey(auto = false) @Setter("name") val

    name: String, @Column @Setter("avatarUrl") val avatarUrl: String?, @Column @Setter("htmlUrl") val htmlUrl: String?, @Column @Setter("contributions") val contributions: Int )

59. Orma @Table data class Contributor( @PrimaryKey(auto = false) @Setter("name") val

    name: String, @Column @Setter("avatarUrl") val avatarUrl: String?, @Column @Setter("htmlUrl") val htmlUrl: String?, @Column @Setter("contributions") val contributions: Int )

60. OrmaDatabaseੜ੒

61. Orma val orma = OrmaDatabase.builder(context) .writeOnMainThread(AccessThreadConstraint.FATAL) .readOnMainThread(AccessThreadConstraint.FATAL) .build()

62. Orma val orma = OrmaDatabase.builder(context) .writeOnMainThread(AccessThreadConstraint.FATAL) .readOnMainThread(AccessThreadConstraint.FATAL) .build()

63. Orma val orma = OrmaDatabase.builder(context) .writeOnMainThread(AccessThreadConstraint.FATAL) .readOnMainThread(AccessThreadConstraint.FATAL) .build()

64. CRUD

65. Insert orma.prepareInsertIntoContributor(OnConflict.REPLACE) .executeAll(contributors)

66. Insert orma.transactionSync { orma.prepareInsertIntoContributor(OnConflict.REPLACE) .executeAll(contributors) }

67. Insert orma.transactionAsCompletable { orma.prepareInsertIntoContributor(OnConflict.REPLACE) .executeAll(contributors) }

68. Select orma.selectFromContributor() .executeAsObservable() .toList()

69. Select orma.selectFromContributor() .nameEq("lvla") .executeAsObservable() .toList()

70. Sample

71. Client

72. Client class GitHubClient(private val service: GitHubService) { fun fetchContributors(): Observable<List<Contributor>>

    { return service.fetchContributors(“DroidKaigi", "conference-app-2017") }

73. Client class GitHubClient(private val service: GitHubService) { fun fetchContributors(): Observable<List<Contributor>>

    { return service.fetchContributors(“DroidKaigi", "conference-app-2017") }

74. Dao

75. Dao class ContributorDao(orma: OrmaDatabase) { fun insert(contributors: List<Contributor>) { orma.transactionSync

    { orma.prepareInsertIntoContributor(OnConflict.REPLACE) .executeAll(contributors) } } fun findAll(): List<Contributor> { return orma.selectFromContributor() .executeAsObservable() .toList() } }

76. Dao class ContributorDao(orma: OrmaDatabase) { fun insert(contributors: List<Contributor>) { orma.transactionSync

    { orma.prepareInsertIntoContributor(OnConflict.REPLACE) .executeAll(contributors) } } fun findAll(): List<Contributor> { return orma.selectFromContributor() .executeAsObservable() .toList() } }

77. Dao class ContributorDao(orma: OrmaDatabase) { fun insert(contributors: List<Contributor>) { orma.transactionSync

    { orma.prepareInsertIntoContributor(OnConflict.REPLACE) .executeAll(contributors) } } fun findAll(): List<Contributor> { return orma.selectFromContributor() .executeAsObservable() .toList() } }

78. Repository

79. Repository class ContributorRepository( private val client: GitHubClient, private val dao:

    ContributorDao) { fun getContributors(): Observable<List<Contributor>> { return client.fetchContributors() .doOnNext { list -> dao.insert(list) } .onErrorReturn { dao.findAll() } } }

80. Repository class ContributorRepository( private val client: GitHubClient, private val dao:

    ContributorDao) { fun getContributors(): Observable<List<Contributor>> { return client.fetchContributors() .doOnNext { list -> dao.insert(list) } .onErrorReturn { dao.findAll() } } }

81. Repository class ContributorRepository( private val client: GitHubClient, private val dao:

    ContributorDao) { fun getContributors(): Observable<List<Contributor>> { return client.fetchContributors() .doOnNext { list -> dao.insert(list) } .onErrorReturn { dao.findAll() } } }

82. Repository class ContributorRepository( private val client: GitHubClient, private val dao:

    ContributorDao) { fun getContributors(): Observable<List<Contributor>> { return client.fetchContributors() .doOnNext { list -> dao.insert(list) } .onErrorReturn { dao.findAll() } } }

83. Activity

84. Activity class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?)

    { super.onCreate(savedInstanceState) val retrofit = Retrofit.Builder().......build() val orma = OrmaDatabase.builder(context).......build() val service = retrofit.create(GitHubService::class.java) val client = ContributorClient(service) val dao = ContributorDao(orma) val repository = ContributorRepository(client, dao) repository.getContributors() .subscribeOn(Schedulers.io()) .observeOn(AndroidSchedulers.mainThread()) .subscribe( { contributors -> showContributors(contributors) }, { Timber.e(it, "getContributors") } ) } }

85. Activity class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?)

    { super.onCreate(savedInstanceState) val retrofit = Retrofit.Builder().......build() val orma = OrmaDatabase.builder(context).......build() val service = retrofit.create(GitHubService::class.java) val client = ContributorClient(service) val dao = ContributorDao(orma) val repository = ContributorRepository(client, dao) repository.getContributors() .subscribeOn(Schedulers.io()) .observeOn(AndroidSchedulers.mainThread()) .subscribe( { contributors -> showContributors(contributors) }, { Timber.e(it, "getContributors") } ) } }

86. Activity class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?)

    { super.onCreate(savedInstanceState) val retrofit = Retrofit.Builder().......build() val orma = OrmaDatabase.builder(context).......build() val service = retrofit.create(GitHubService::class.java) val client = ContributorClient(service) val dao = ContributorDao(orma) val repository = ContributorRepository(client, dao) repository.getContributors() .subscribeOn(Schedulers.io()) .observeOn(AndroidSchedulers.mainThread()) .subscribe( { contributors -> showContributors(contributors) }, { Timber.e(it, "getContributors") } ) } }

87. Activity class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?)

    { super.onCreate(savedInstanceState) val retrofit = Retrofit.Builder().......build() val orma = OrmaDatabase.builder(context).......build() val service = retrofit.create(GitHubService::class.java) val client = ContributorClient(service) val dao = ContributorDao(orma) val repository = ContributorRepository(client, dao) repository.getContributors() .subscribeOn(Schedulers.io()) .observeOn(AndroidSchedulers.mainThread()) .subscribe( { contributors -> showContributors(contributors) }, { Timber.e(it, "getContributors") } ) } }

88. Activity class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?)

    { super.onCreate(savedInstanceState) val retrofit = Retrofit.Builder().......build() val orma = OrmaDatabase.builder(context).......build() val service = retrofit.create(GitHubService::class.java) val client = ContributorClient(service) val dao = ContributorDao(orma) val repository = ContributorRepository(client, dao) repository.getContributors() .subscribeOn(Schedulers.io()) .observeOn(AndroidSchedulers.mainThread()) .subscribe( { contributors -> showContributors(contributors) }, { Timber.e(it, "getContributors") } ) } }

89. Activity class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?)

    { super.onCreate(savedInstanceState) val retrofit = Retrofit.Builder().......build() val orma = OrmaDatabase.builder(context).......build() val service = retrofit.create(GitHubService::class.java) val client = ContributorClient(service) val dao = ContributorDao(orma) val repository = ContributorRepository(client, dao) repository.getContributors() .subscribeOn(Schedulers.io()) .observeOn(AndroidSchedulers.mainThread()) .subscribe( { contributors -> showContributors(contributors) }, { Timber.e(it, "getContributors") } ) } }

90. Activity class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?)

    { super.onCreate(savedInstanceState) val retrofit = Retrofit.Builder().......build() val orma = OrmaDatabase.builder(context).......build() val service = retrofit.create(GitHubService::class.java) val client = ContributorClient(service) val dao = ContributorDao(orma) val repository = ContributorRepository(client, dao) repository.getContributors() .subscribeOn(Schedulers.io()) .observeOn(AndroidSchedulers.mainThread()) .subscribe( { contributors -> showContributors(contributors) }, { Timber.e(it, "getContributors") } ) } }

91. Activity class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?)

    { super.onCreate(savedInstanceState) val retrofit = Retrofit.Builder().......build() val orma = OrmaDatabase.builder(context).......build() val service = retrofit.create(GitHubService::class.java) val client = ContributorClient(service) val dao = ContributorDao(orma) val repository = ContributorRepository(client, dao) repository.getContributors() .subscribeOn(Schedulers.io()) .observeOn(AndroidSchedulers.mainThread()) .subscribe( { contributors -> showContributors(contributors) }, { Timber.e(it, "getContributors") } ) } }

92. Activity class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?)

    { super.onCreate(savedInstanceState) val retrofit = Retrofit.Builder().......build() val orma = OrmaDatabase.builder(context).......build() val service = retrofit.create(GitHubService::class.java) val client = ContributorClient(service) val dao = ContributorDao(orma) val repository = ContributorRepository(client, dao) repository.getContributors() .subscribeOn(Schedulers.io()) .observeOn(AndroidSchedulers.mainThread()) .subscribe( { contributors -> showContributors(contributors) }, { Timber.e(it, "getContributors") } ) } }

93. Activity class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?)

    { super.onCreate(savedInstanceState) val retrofit = Retrofit.Builder().......build() val orma = OrmaDatabase.builder(context).......build() val service = retrofit.create(GitHubService::class.java) val client = ContributorClient(service) val dao = ContributorDao(orma) val repository = ContributorRepository(client, dao) repository.getContributors() .subscribeOn(Schedulers.io()) .observeOn(AndroidSchedulers.mainThread()) .subscribe( { contributors -> showContributors(contributors) }, { Timber.e(it, "getContributors") } ) } }

94. ґଘੑͷղܾ͸Dagger2 ʹ೚ͤΑ͏ɻ

95. Dagger2

96. ‣ Google։ൃͷJava/Android޲͚DIίϯςφ ‣ ΞϊςʔγϣϯΛར༻ͨ͠ґଘੑͷղܾ ‣ ߴ଎ Dagger2

97. ґଘੑͷάϥϑ Repository Dao Client Service Orma Context Retrofit OkHttp Activity

98. ґଘੑͷղܾΛ͢Δͷʹඞཁͳ΋ͷ Injectee Component Module Inject͞ΕΔଆ Inject͢Δଆ ґଘੑͷఏڙऀ
 (Inject͢Δ෺)

99. Module @Module class ApplicationModule(private val applicationContext: App) { @Provides fun

    provideContext(): Context {…} @Provides fun provideOkHttp(): OkHttpClient {…} @Provides fun provideRetrofit(o: OkHttpClient): Retrofit {…} @Provides fun provideOrma(c: Context): OrmaHolder {…} @Provides fun provide…Dao(oh: OrmaHolder): ContributorDao {…} @Provides fun provideGitHubService(r: Retrofit): GitHubService {…} @Provides fun provideGitHubClient(s: GitHubService): GitHubClient {…} }

100. Module @Module class ApplicationModule(private val applicationContext: App) { @Provides fun

     provideContext(): Context {…} @Provides fun provideOkHttp(): OkHttpClient {…} @Provides fun provideRetrofit(o: OkHttpClient): Retrofit {…} @Provides fun provideOrma(c: Context): OrmaHolder {…} @Provides fun provide…Dao(oh: OrmaHolder): ContributorDao {…} @Provides fun provideGitHubService(r: Retrofit): GitHubService {…} @Provides fun provideGitHubClient(s: GitHubService): GitHubClient {…} }

101. Module @Module class ApplicationModule(private val applicationContext: App) { @Provides fun

     provideContext(): Context {…} @Provides fun provideOkHttp(): OkHttpClient {…} @Provides fun provideRetrofit(o: OkHttpClient): Retrofit {…} @Provides fun provideOrma(c: Context): OrmaHolder {…} @Provides fun provide…Dao(oh: OrmaHolder): ContributorDao {…} @Provides fun provideGitHubService(r: Retrofit): GitHubService {…} @Provides fun provideGitHubClient(s: GitHubService): GitHubClient {…} }

102. Module @Module class ApplicationModule(private val applicationContext: App) { @Provides fun

     provideContext(): Context {…} @Provides fun provideOkHttp(): OkHttpClient {…} @Provides fun provideRetrofit(o: OkHttpClient): Retrofit {…} @Provides fun provideOrma(c: Context): OrmaHolder {…} @Provides fun provide…Dao(oh: OrmaHolder): ContributorDao {…} @Provides fun provideGitHubService(r: Retrofit): GitHubService {…} @Provides fun provideGitHubClient(s: GitHubService): GitHubClient {…} }

103. TIPS @Module class ApplicationModule(private val applicationContext: App) { @Provides fun

     provideContext(): Context {…} @Provides fun provideOkHttp(): OkHttpClient {…} @Provides fun provideRetrofit(o: OkHttpClient): Retrofit {…} @Provides fun provideOrma(c: Context): OrmaHolder {…} @Provides fun provide…Dao(oh: OrmaHolder): ContributorDao {…} @Provides fun provideGitHubService(r: Retrofit): GitHubService {…} @Provides fun provideGitHubClient(s: GitHubService): GitHubClient {…} }

104. ‣ Constructor Injection ‣ SubComponent ‣ Include Module ‣ ….

     TIPS

105. Component @Singleton @Component(modules = arrayOf(ApplicationModule::class)) interface ApplicationComponent { fun inject(a:

     MainActivity) }

106. Component @Singleton @Component(modules = arrayOf(ApplicationModule::class)) interface ApplicationComponent { fun inject(a:

     MainActivity) }

107. Component @Singleton @Component(modules = arrayOf(ApplicationModule::class)) interface ApplicationComponent { fun inject(a:

     MainActivity) }

108. Component @Singleton @Component(modules = arrayOf(ApplicationModule::class)) interface ApplicationComponent { fun inject(a:

     MainActivity) }

109. Field Injection class MainActivity : AppCompatActivity() { @Inject lateinit var

     repository: ContributorRepository }

110. AnnotationProcessing Injectee Component Module Dagger2 ԿॲʹԿΛInject͢΂͖͔͕Θ͔Δ

111. AnnotationProcessing Injectee Component Module Dagger2 ͜ͷComponent͕
 ԿॲʹԿΛInjectͰ͖Δͷ͔͕Θ͔Δ

112. AnnotationProcessing Injectee Component Module Dagger2 DaggerComponent Implement Dagger2͕Componentͷ࣮૷ΫϥεΛੜ੒

113. ApplicationModule Repository Dao Client Service Orma Context Retrofit OkHttp Module

114. ApplicationComponent Repository Dao Client Service Orma Context Retrofit OkHttp Module

     Component

115. ApplicationComponent Repository Dao Client Service Orma Context Retrofit OkHttp Activity

     Inject Module Component

116. Application class class App : Application() { lateinit var component:

     ApplicationComponent override fun onCreate() { component = DaggerApplicationComponent.builder() .applicationModule(ApplicationModule(this)) .build() } }

117. Application class class App : Application() { lateinit var component:

     ApplicationComponent override fun onCreate() { component = DaggerApplicationComponent.builder() .applicationModule(ApplicationModule(this)) .build() } }

118. Application class class App : Application() { lateinit var component:

     ApplicationComponent override fun onCreate() { component = DaggerApplicationComponent.builder() .applicationModule(ApplicationModule(this)) .build() } }

119. Application class class App : Application() { lateinit var component:

     ApplicationComponent override fun onCreate() { component = DaggerApplicationComponent.builder() .applicationModule(ApplicationModule(this)) .build() } }

120. Application class class App : Application() { lateinit var component:

     ApplicationComponent override fun onCreate() { component = DaggerApplicationComponent.builder() .applicationModule(ApplicationModule(this)) .build() } }

121. Application class class App : Application() { lateinit var component:

     ApplicationComponent override fun onCreate() { component = DaggerApplicationComponent.builder() .applicationModule(ApplicationModule(this)) .build() } }

122. Application class class App : Application() { val component: ApplicationComponent

     by lazy { DaggerApplicationComponent.builder() .applicationModule(ApplicationModule(this)) .build() } }

123. MainActivity class MainActivity : AppCompatActivity() { @Inject lateinit var repository:

     ContributorRepository override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) (application as App).component.inject(this) repository.getContributors().... } }

124. MainActivity class MainActivity : AppCompatActivity() { @Inject lateinit var repository:

     ContributorRepository override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) (application as App).component.inject(this) repository.getContributors().... } }

125. MainActivity class MainActivity : AppCompatActivity() { @Inject lateinit var repository:

     ContributorRepository override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) (application as App).component.inject(this) repository.getContributors().... } }

126. Before class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?)

     { super.onCreate(savedInstanceState) val retrofit = Retrofit.Builder().......build() val orma = OrmaDatabase.builder(context).......build() val service = retrofit.create(GitHubService::class.java) val client = ContributorClient(service) val dao = ContributorDao(orma) val repository = ContributorRepository(client, dao) repository.getContributors() .subscribeOn(Schedulers.io()) .observeOn(AndroidSchedulers.mainThread()) .subscribe( { contributors -> showContributors(contributors) }, { Timber.e(it, "getContributors") } ) } }

127. After class MainActivity : AppCompatActivity() { @Inject lateinit var repository:

     ContributorRepository override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) (application as App).component.inject(this) repository.getContributors() .subscribeOn(Schedulers.io()) .observeOn(AndroidSchedulers.mainThread()) .subscribe( { contributors -> showContributors(contributors) }, { Timber.e(it, "getContributors") } ) } }

128. Conclusion

129. ‣ KotlinͰ৑௕ͳهड़ΛݮΒ͢ࣄ͕Ͱ͖Δ ‣ RxJavaͰॊೈͳΠϕϯτॲཧ/ඇಉظॲཧΛߦ͏͜ͱ͕ Ͱ͖Δ ‣ RetrofitͰHTTP௨৴ΛRxJavaͰѻ͑Δ ‣ OrmaʹSQLiteͷॲཧΛ೚ͤΒΕΔ ‣

     Dagger2ʹґଘੑͷղܾΛҕৡͰ͖Δ Conclusion

130. Thank you