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Android 1 What’s New in Jetpack Sungyong An Android Developer, NAVER WEBTOON

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What’s new in Jetpack | Session Jetpack | Q&A 발표내용은 위에 명시된 2021년도 Google I/O 영상을 기반으로 준비했습니다. 2

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3 02 Stable 01 Jetpack & Versioning 04 Additional Talks 03 Alpha & Beta

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android jetpack Jetpack은 모든 Android 버전과 기기에서 일관된 코드 를 작성하여, 개발자가 보다 중요한 코드에 집중할 수 있 도록 도와주는 라이브러리 모음입니다. 4

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Timeline 2011 Android Support Library 2016 Constraint Layout 2015 Data Binding 2017 Architecture Components Lifecycle ViewModel LiveData Room Kotlin 2019 Kotlin first! Security ViewPager2 CameraX Benchmark 2018 Android Jetpack KTX Navigation WorkManager SavedState Paging 2020 ViewBinding Compose Startup DataStore Window Hilt 2021 Macrobenchmark AppSearch Wear Tile Emoji2 5

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TOP 1,000 জ ઺ non-core Jetpack ۄ੉࠳۞ܻܳ 2ѐ ੉࢚ ࢎਊೞח ࠺ਯ 47% 2020 79% 2021 6

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alpha, beta ୹द ੹੄ ઱ӝ৬ ѐߊ੗ীѱ যڃ ੄޷ੋ૑ ঌইࠇפ׮ Versioning 7

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8 ѐߊ ૓೯ ઺ੋ ۄ੉࠳۞ܻ۽ APIо ୶о, ߸҃غѢա ࢏ઁؼ ࣻ ੓णפ׮. ߡӒо ੓ਸ ࣻب ੓૑݅ ӝࠄ੸ਵ۽ח Ѩૐغযࢲ ੜ ز੘೤פ׮. Alpha ӝמ੉ উ੿ചػ ۄ੉࠳۞ܻੑפ׮. ੉੹ীח Beta ױ҅ীࢲ APIо ߸҃غ૑ ঋח Ѫ੉ ਗ஗੉঻૑݅, ੉ઁח बпೠ ޙઁо ߊࢤೞѢա ഑਷ ழޭפ౭ ೖ٘ߔী ٮۄࢲ APIо ߸҃ؼ ࣻ ੓׮Ҋ ೤פ׮. Beta

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Q RC৬ Betaח যڃ ର੉о ੓աਃ? ৘੹ী Support Libraryীࢲח RC ױ҅о হ঻णפ׮. ੉ ҃਋, ߡӒܳ ࣻ੿ೞݶ ߈٘द ಁ஖ ܾܻૉܳ ೧ঠೞҊ, ୭न ߡ੹੉ ҅ࣘ ৢۄт ࣻ ੓णפ׮. RC ױ҅ীࢲח ߡӒо ࣻ੿غݶ RC ߡ੹݅ ৢܻҊ, ୭न ߡ੹ীח ৔ೱ੉ হणפ׮. A ( * ੄৉੉ ੓ਸ ࣻ ੓णפ׮ ) 9

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androidx.annotation:annotation-experimental STABLE بҳ ߂ ׮ܲ ѐߊ੗о ௏٘ܳ ੉೧ೞחؘ ب਑ਸ ઱ח ݫఋؘ੉ఠ Experimental Annotations 10

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builder.setAutoCloseTimeout(1000, SECONDS) 실험적인 기능에는 RequiresOptIn 주석이 사용되어, API가 알파 단계인 것을 개발자가 알 수 있습니다. Error: This declaration is opt-in and its usage should be marked with @ExperimentalRoomApi or @OptIn(ExperimentalRoomApi::class) [UnsafeOptInUsageError] 11

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@OptIn(ExperimentalRoomApi::class) builder.setAutoCloseTimeout(1000, SECONDS) 알파 단계인 것을 이해하고 사용을 원하는 경우, OptIn을 선언하면 됩니다. 12

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@Target({ElementType.METHOD}) @RequiresOptIn() public @interface ExperimentalRoomApi {} @NonNull @ExperimentalRoomApi public Builder setAutoCloseTimeout(...) { ... } 실제로 사용할 때는 Experimental Annotation을 생성한 후, Experimental API 선언하면 됩니다. 13

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14 02 Stable 01 Jetpack & Versioning 03 Alpha & Beta 04 Additional Talks

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androidx.fragment:fragment STABLE ࢎਊ੗ ੋఠಕ੉झܳ ੤ࢎਊ оמೠ ҳࢿ ਃࣗ۽ ࠙ೡ೧઱ח ୶࢚ച Fragment 15

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উ੿ࢿਸ ֫੉Ҋ ޙࢲചغ૑ ঋ਷ ز੘ਸ ઴੉ӝ ਤ೧ ղࠗܳ ѐࢶ೮णפ׮. • fragment 1.3.0ਵ۽ সؘ੉౟ೞӝ ੹ী ԙ ܾܻૉ ֢౟ܳ ੍যࠁࣁਃ. ActivityResultب ా೤غ঻णפ׮. Fragment 16 Link: h tt ps://developer.android.com/jetpack/androidx/releases/fragment#1.3.0

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// Obtain the fragment manager. May be a childFragmentManager, // if in a fragment, to observe child attachment. val fm = supportFragmentManager val listener = FragmentOnAttachListener { fragmentManager, fragment -> // Respond to the fragment being attached. } fm.addFragmentOnAttachListener(listener) onAttachFragment()는 사용 중단되었습니다. 17

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androidx.constraintlayout:constraintlayout STABLE UI ਤ஖ܳ ૑੿ೞѢա গפݫ੉࣌ਸ ਤೠ ਬোೞҊ ૒ҙ੸ੋ ٣੗ੋ दझమੑפ׮ ConstraintLayout 18

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MotionLayout Editor Motion Editor는 애니메이션 디자인을 위한 인터랙티브 시각 도구를 제공합니다. 19

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MotionLayout 20 What's New in Design Tools

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androidx.camera:camera STABLE ׮নೠ Android OS ߡ੹ ߂ ੢஖ীࢲ ஠ݫۄܳ ઁযೞҊ ಴दೡ ࣻ ੓ח ా೤ػ API CameraX 21

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ҕా ӝמ ਃ୒ ߂ ߡӒ ೧Ѿ • ֢୹ ࠁ੿ • ஠ݫۄ ࢚క, ӝמ ੿ࠁী ੽Ӕоמ • Camera2 ࢸ੿җ ഐജ CameraX ୭न ӝӝ ߂ OS ӝמ ૑ਗ • HDR Preview* • Zoom ratio control • Do-Not-Disturb ؊ ա਷ ҃೷ਸ ઁҕೞח ࢿמ ѐࢶ • ࢎ૓ ୫৔੉ ୭؀ 15% ؊ ࡈۄ૗** • ؊ ࡅܲ ୡӝച 
 (য়ېػ ੢஖ীࢲ ୭؀ 25 %) ** rc01৬ ࠺Үೞৈ, Samsung J4+ ӝӝীࢲ ஏ੿ػ ಣӐчੑפ׮ * Pixel 4a, 5ীࢲ ૑ਗغݴ, ؊ ݆਷ ӝӝীࢲ ઁҕؼ ৘੿פ׮ 22

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// Set up the CameraController val cameraController = LifecycleCameraController(context) cameraController.bindToLifecycle(lifecycleOwner) // Attach the CameraController to PreviewView val previewView = findViewById(R.id.preview_view) previewView.setController(cameraController) // Use the CameraController cameraController.takePicture(...) CameraController와 PreviewView를 이용하여 
 미리보기를 설정하고 사진을 촬영하는 코드입니다. 23

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androidx.hilt:hilt STABLE Jetpack ਊਵ۽ ҳ୷ػ, Dagger ӝ߈੄ ױࣽചػ DI ࣛܖ࣌ Hilt

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class MyViewModel @ViewModelInject constructor( @Assisted val handle: SavedStateHandle, val repository: Repository ) : ViewModel { // ... } implementation "androidx.hilt:hilt-lifecycle-viewmodel:$hilt_version" 2020 25

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@HiltViewModel class MyViewModel @Inject constructor( val handle: SavedStateHandle, val repository: Repository ) : ViewModel { // ... } @AndroidEntryPoint class MyFragment : Fragment() { val viewModel: MyViewModel by viewModels() val navigationGraphScoped: MyViewModel by hiltNavGraphViewModels(R.id.nav_graph) } 2021 Hilt가 Stable 단계로 전환하면서 Core API에서 ViewModel을 지원합니다. SavedStateHandle도 기본으로 주입됩니다. 26

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class MyWorker @WorkerInject constructor( @Assisted context: Context, @Assisted params: WorkerParameters, repo: Repository ) : Worker { //... } 2020 27

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@HiltWorker class MyWorker @AssistedInject constructor( @Assisted context: Context, @Assisted params: WorkerParameters, repo: Repository ) : Worker { //... } 2021 AssistedInject를 사용해 WorkManager 통합도 개선했습니다. 28

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WorkManager 2.5.0 29

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Hilt와 WorkManager 2.6를 사용하면 Manifest에서 ContentProvider 대신 Startup node를 제거해야 합니다. WorkManager 2.6.0 30

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@HiltAndroidTest @UninstallModules(RepositoryModule::class) @RunWith(AndroidJUnit4::class) class Test { @Module @InstallIn(ApplicationComponent::class) object FakeRepositoryModule { @Provides fun provideRepo() = FakeRepository() } } 2020 31

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@Module @TestInstallIn( components = SingletonComponent::class, replaces = RepositoryModule::class ) object FakeRepositoryModule { @Provides fun provideRepo() = FakeRepository() } 새로운 TestInstallIn 주석을 사용하여 테스트 모듈을 삭제,교체할 수 있습니다. 2021 32

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androidx.work:work STABLE উ੿੸ਵ۽ प೯೧ঠ ೞח ૑ো оמೠ ࠺زӝ ੘সਸ ৘ড೤פ׮ WorkManager

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2.5+ ߡ੹ࠗఠ ݣ౭ ೐۽ࣁझ জਸ ૑ਗ೤פ׮. (:work:work-multiprocess) ߡ੹ 2.7ীࢲח Android S ನӒۄ਍٘ ઁೠਸ ୶о ૑ਗ೤פ׮. ▪︎ ੗ࣁೠ ղਊ਷ Effective Background Tasks on Android ࣁ࣌ਸ द୒೧ࠁࣁਃ. ੉ઁ WorkManager Inspectorܳ Android Studio Arctic Foxࠗఠ ࢎਊೡ ࣻ ੓णפ׮. WorkManager 34

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WorkManager inspector 35

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WorkManager inspector 36

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androidx.room:room STABLE ࢎਊࢿ, উ੹ࢿ ߂ పझ౟ оמࢿਸ ਤ೧ ࢸ҅ػ ؘ੉ఠ߬੉झ ૑ࣘࢿ ۨ੉য Room 37

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Kotlin Symbol Processingী ؀ೠ प೷੸ ૑ਗ enums ӝࠄ ૑ਗ RxJava3 ૑ਗ ݺ۸ प೯ ۽Ӧҗ э਷ ੘সਸ ಞೞѱ ೧઱ח QueryCallback بੑ Room 38

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@ProvidedTypeConverter class TimeStampConverter(timeformat: String) { @TypeConverter fun fromTimestamp(value: Long) { // ... } } Room.inMemoryDatabaseBuilder(context, CacheDatabase::class) .addTypeConverter(TimeStampConverter(getPreferredTimeFormat())) .build() 런타임에 TypeConverter 를 설정할 수도 있습니다. 39

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androidx.paging:paging STABLE ੘਷ ױਤ۽ ؘ੉ఠܳ ࠛ۞য়Ҋ ಴दೞৈ ֎౟ਕ௼৬ दझమ ܻࣗझ ࣗ࠺ܳ ѐࢶ೤פ׮ Paging 40

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Kotlin coroutines৬ Flowܳ ୭਋ࢶਵ۽ ૑ਗ೤פ׮. RxJava ژח Guavaܳ ੉ਊೠ ࠺زӝ ۽٬ਸ ૑ਗ೤פ׮. repository৬ presentation ҅க੉ ѐࢶؾפ׮. ݠܻӖ, ߄ׯӖ, ҳ࠙੗ ߂ ۽٬ ࢚కܳ ૑ਗ೤פ׮. Paging 3 Link: h tt ps://developer.android.com/topic/libraries/architecture/paging/v3-migration 41

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androidx.security:security-crypto STABLE ౵ੌҗ SharedPreferencesܳ উ੹ೞҊ औѱ ঐഐചೞࣁਃ Security Crypto 42

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val prefs: SharedPreferences = EncryptedSharedPreferences.create( context, "prefs_file_name", mainKey, prefKeyEncryptionScheme = AES256_SIV, prefValueEncryptionScheme = AES256_GCM ) // Use the resulting SharedPreferences object as usual. prefs.edit() .putBoolean("show_completed", true) .apply() SharedPreferences를 암호화하려면, 적절한 키와 스키마로 암호화된 SharedPreference 객체를 생성하면 됩니다. 43

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val passphrase = SQLiteDatabase.getBytes(userEnteredPassphrase) val factory = SupportFactory(passphrase) val room = Room.databaseBuilder(activity, SomeDatabase.class, DB_NAME) .openHelperFactory(factory) .build() Link: h tt ps://github.com/sqlcipher/android-database-sqlcipher Q ୶റী Security-Crypto ۄ੉࠳۞ܻо Room੉ա DataStoreܳ ૑ਗೡ ҅ദ੉ ੓աਃ? ೱറ ߡ੹ীࢲ DataStore৬ח ా೤ؼ ৘੿ੑפ׮. Room਷ ҳ୓੸ੋ ҅ദ੉ হणפ׮. ׮݅ SQLCipherܳ ࢎਊೞݶ ૑Әب ঐഐചೡ ࣻ ੓णפ׮. A 44

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45 02 Stable 03 Alpha & Beta 01 Jetpack & Versioning 04 Additional Talks

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androidx.datastore:datastore BETA SharedPreferencesী ؀ೠ рױೞҊ ъ۱ೠ ؀উਸ ઁҕೞח ؘ੉ఠ ੷੢ ࣛܖ࣌ DataStore 46

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DataStore SharedPreferencesܳ ؀୓ Kotlin coroutines / Flow۽ ৮੹ೠ ࠺زӝ RxJava 2 & 3 ૑ਗ ৈ۞ ҳഅ୓ ૑ਗ Proto DataStore (stronly typed) Preference DataStore (ః-ч ह) ૒੽ ҳഅب оמ (ex. Kotlin Serialization) Link: h tt ps://developer.android.com/topic/libraries/architecture/datastore 47

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࠺زӝ API Shared Preferences DataStore ✅ (coroutines, RxJava) ✅ (change listener݅ ઁҕ) ✅ (runBlocking) ✅ ✅ ✅ ✅ ✅ ✅ (ProtoBuf) ❌ ✅ ❌ ❌ ❌ ❌ ❌ زӝ API UI ॳۨ٘ীࢲ ഐ୹ীب উ੹ೠо? য়ܨܳ ಴दೡ ࣻ ੓חо? ۠ఋ੐ য়ܨ۽ࠗఠ উ੹ೠо? ъೠ ੌҙࢿਸ ࠁ੢ೞח ౟ے੥࣌ API ؘ੉ఠ ݃੉Ӓۨ੉࣌ ୊ܻ ഋध উ੹ࢿ 48

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val Context.prefStore: DataStore by preferencesDataStore( name = USER_PREFERENCES_NAME, produceMigrations = { context -> // Since we're migrating from SharedPreferences, add // a migration based on the SharedPreferences name. listOf(SharedPreferencesMigration(context, USER_PREFERENCES_NAME)) } } SharedPreferencesMigration를 이용하여 SharedPreferences에서 DataStore로 손쉽게 마이그레이션할 수 있습니다. Link: h tt ps://github.com/googlecodelabs/android-datastore 49

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androidx.navigation:navigation ALPHA জ ղ ఐ࢝ਸਤೠ ೐ۨ੐ਕ௼ੑפ׮ ੉ઁ ׮઺ ߔझఖਸ ૑ਗ೤פ׮ Navigation 50

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Navigation 2.4.0ী ׮઺ ߔ झఖ ӝמ੉ ನೣغ঻णפ׮. • navigation-fragmentח Fragment 1.4.0ী ୶оػ APIܳ ੉ਊ೤פ׮. 
 (saveBackStack(), restoreBackStack()) NavigationUIܳ ࢎਊೞݶ, ӝࠄਵ۽ ഝࢿചؾפ׮. Navigation 51 Link: h tt ps://developer.android.com/jetpack/androidx/releases/navigation#2.4.0-alpha01

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52 Link: h tt ps://medium.com/androiddevelopers/multiple-back-stacks-b714d974f134 Fragment: Multiple back stacks fragmentManager.commit { setReorderingAllowed(true) replace(R.id.fragment_container) } fragmentManager.commit { setReorderingAllowed(true) replace(R.id.fragment_container) addToBackStack("profile") } fragmentManager.commit { setReorderingAllowed(true) replace(R.id.fragment_container) addToBackStack("edit_profile") }

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53 Link: h tt ps://medium.com/androiddevelopers/multiple-back-stacks-b714d974f134 Fragment: Multiple back stacks fragmentManager.saveBackStack("profile") fragmentManager.commit { setReorderingAllowed(true) replace(R.id.fragment_container) addToBackStack("notifications") }

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54 Link: h tt ps://medium.com/androiddevelopers/multiple-back-stacks-b714d974f134 Fragment: Multiple back stacks fragmentManager.saveBackStack("notifications") fragmentManager.restoreBackStack("profile")

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// or val navOptions = NavOptions.Builder() .setLaunchSingleTop(true) .setRestoreState(true) .setPopUpTo( navController.graph.findStartDestination().id, inclusive = false, saveState = true ) .build() navController.navigate(selectedBottomNavId, null, navOptions) 직접 API를 호출하는 방법도 있습니다. 55

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androidx.appsearch:appsearch ALPHA জ ۽ஸ ߂ ӝӝ ੹୓ ৔৉ীࢲ Ҋࢿמ ੹୓ ఫझ౟ Ѩ࢝੉ оמ೤פ׮ AppSearch 56

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AppSearch SQLҗ ࠺Ү೧ ݽٚ ӝמ ઁҕ Prefix indexing Relevance ranking Usage scoring Ҋә ੹୓ ఫझ౟ Ѩ࢝ ૑ਗ Fuzzy matching Query expansion Language support 57 Link: h tt ps://developer.android.com/guide/topics/search/appsearch Local Storage Person Builder Message Builder Platform Storage Android S+ ࠗఠ ӝӝ ੹୓ Ѩ࢝җ ా೤غח 
 ઺ঔ ૘઺ध झషܻ૑о ੓׮Ҋ ೤פ׮. (ই૒ ޷૑ਗ)

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ղࠗ੸ਵ۽ Icing Search ۄ੉࠳۞ܻܳ ࢎਊ೤פ׮. 58 h tt ps://android.googlesource.com/pla tf orm/external/icing/

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androidx.benchmark.macro:macro ALPHA ۽ஸ ژח CI ীࢲ জ द੘दрҗ झ௼܀ ࢿמਸ ੿ഛೞѱ ஏ੿೧ࠁࣁਃ Macrobenchmark * Android Studio Arctic Foxࠗఠ ૑ਗ೤פ׮ 59

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ࢿמ ஏ੿਷ য۵׮ प ࢎਊ੗ ૑಴ח ૘҅ؼ ٸө૑ য়ېѦܽ׮. ۽ஸীࢲ ѐࢶೞҊ ஏ੿ೡ ࣻ ੓যঠ ೠ׮. Benchmark ۄ੉࠳۞ܻח ࢎਊ୊о ઁೠ੸੉׮. Startup੉ա Jankܳ ஏ੿ೡ ࣻ হ׮. উ੿੸ਵ۽ ஏ੿ೞӝ য۵׮. Ӓېࢲ Macrobenchmark ۄ੉࠳۞ܻܳ ࢜۽ ࣗѐ೤פ׮. 60

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@get:Rule val benchmarkRule = MacrobenchmarkRule() @Test fun startup() = benchmarkRule.measureRepeated( packageName = "mypackage.myapp", metrics = listOf(StartupTimingMetric()), // FrameTimingMetric() compilationMode = CompilationMode.SpeedProfile(), // None, Speed startupMode = StartupMode.COLD, // WARM, HOT iterations = 5 ) { pressHome() startActivityAndWait(Intent().apply { action = "mypackage.myapp.myaction" }) } Link: h tt ps://github.com/android/pe rf ormance-samples/MacrobenchmarkSample 61

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Macrobenchmark प೯ Ѿҗ੄ ୭ࣗ, ୭؀, ಣӐਸ ഛੋೡ ࣻ ੓णפ׮. ݂௼ܳ ௿ܼೞݶ, Studio Profiler۽ ੉زೞৈ systrace ੿ࠁܳ ࠅ ࣻ ੓णפ׮. 62

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Android Studioীࢲ ۽ஸ۽ ࢿמ ೐۽೙ Ѿҗܳ ࠁѢա, ࢎਊ੗ীѱ ৔ೱਸ ઱ӝ ੹ী CIীࢲ ഥӈܳ ഛੋೡ ࣻ ੓णפ׮. Macrobenchmark 63 Measuring Jank and Startup with Macrobenchmark

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androidx.core:core-google-shortcuts ALPHA Google যदझఢ౟ ߂ ׮ܲ Google ઁಿ੄ ز੸ ߄۽оӝܳ ୶о೤פ׮ Google Shortcuts 64

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ShortcutInfoCompat siCompat = ShortcutInfoCompat.Builder(ctx, "id_cappuccino") .setShortLabel("Cappuccino") .setIntent(Intent(ctx, OrderCappuccino::class.java)) .addCapabilityBinding( "actions.intent.ORDER_MENU_ITEM", "menuItem.name", asList("cappuccino") ) .build() ShortcutManagerCompat.pushDynamicShortcut(ctx, siCompat) Link: h tt ps://developer.android.com/guide/topics/ui/sho rt cuts/creating-sho rt cuts#gsi-library pushDynamicShortcut()를 호출하여 동적 바로가기를 게시 또는 업데이트할 수 있습니다. 65

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* AppCompat 1.4.0 ੉࢚ ߡ੹ী ӝࠄਵ۽ ನೣؾפ׮ androidx.emoji2:emoji2-views* ALPHA All the emoji, everywhere 🤩 🎉 EmojiCompat 66

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Link: h tt ps://developer.android.com/jetpack/androidx/releases/emoji2#1.0.0-alpha01 AppCompat을 사용하면 기본으로 활성화됩니다. AppCompat을 사용하지 않는 앱의 경우에는 별도로 제공하는 Widget을 사용해야 합니다. 67

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androidx.startup:startup-runtime BETA জ द੘द ҳࢿ ਃࣗܳ ୡӝചೞח рױೞҊ ബҗ੸ੋ ߑߨ Startup

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ContentProvider۽ ୡӝചೞ؍ Jetpack ۄ੉࠳۞ܻٜ੉ 
 ղࠗ੸ਵ۽ Startupਸ ࢎਊೞח ഋక۽ ߸҃غҊ ੓णפ׮. • Emoji2 1.0.0+ • Lifecycle 2.4.0+ (ProcessLifecycleOwner) • ProfileInstaller 1.0.0+ • WorkManager 2.6.0+ Startup Link: h tt ps://developer.android.com/topic/libraries/app-sta rt up 69

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class MultiProcessInitializationProvider : InitializationProvider() Link: h tt ps://developer.android.com/jetpack/androidx/releases/sta rt up#1.1.0-beta01 멀티 프로세스에서 Startup 라이브러리로 자동 초기화가 가능합니다. 70

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71 02 Stable 04 Additional Talks 01 Jetpack & Versioning 03 Alpha & Beta

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Compose integrations 72

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What’s new in Jetpack Compose Using Jetpack libraries in Compose 73 • Activity • ViewModel • ConstraintLayout • Hilt • Paging • Navigation Compose integrations

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74 Jetpack Composeܳ ࠁ৮ೞח Ѫਸ ݾ಴۽ ೞח ۄ੉࠳۞ܻ ޘ਺ੑפ׮. ѐߊ੗о ੌ߈੸ਵ۽ ೙ਃ۽ ೞ૑݅ 
 ই૒਷ ࢎਊೡ ࣻ হח ӝמਸ ઁҕ೤פ׮. • Image loading (Glide, Coil) • Insets, System UI Controller • AppCompat Theme Adapter • Pager & Flow layout • Swipe to Refresh, Placeholder • Permissions Accompanist

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75 Android XML۽ ੿੄ػ Material Components ప݃ܳ Jetpack Compose ప݃۽ ੤ࢎਊೡ ࣻ ੓ח ۄ੉࠳۞ܻੑפ׮. MDC-Compose Theme Adapter

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Form factors 76

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What's New in Foldables, Tablets, and Large Screens • androidx.window goo.gle/jetpack-window • androidx.slidingpanelayout goo.gle/two-pane Now is the Time: What's New With Wear • androidx.wear d.android.com/wear Form factors 77

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And so much more… 78

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݃૑݄ਵ۽, 79

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Q ੉ઁ LiveDataח Deprecated ؼөਃ? ইתפ׮. Java ࢎਊ੗ܳ ਤ೧ ਬ૑೤פ׮. ࢜۽਍ Jetpack ۄ੉࠳۞ܻח ௏ܖ౯ ӝ߈ਵ۽ ੘ࢿغ঻णפ׮. 
 ೞ૑݅ ੉Ѫ੉ LiveDataܳ Deprecatedೠ׮ח ੄޷ח ইתפ׮. ਋ܻח ೦࢚ ੉੹ ߡ੹җ੄ ഐജࢿਸ Ҋ۰ೞҊ ੓णפ׮. ӒܻҊ RxJavaח ૒ҙ੸੉૑ ঋইࢲ Java݅ ࢎਊೞח ҃਋, LiveDataо о੢ рױೞҊ ഴܯೠ ؀উੑפ׮. ٮۄࢲ LiveDataח ҅ࣘ೧ࢲ ૑ਗؼ ৘੿ੑפ׮. ׮݅ ୭Ӕী LiveData৬ Flowܳ ࠺ҮೞҊ, ل рী ੹ജೞח ߑߨਸ ׸਷ ࢜۽਍ ࠶۽Ӓ ನझ౟ܳ ѱद೮णפ׮. ೠߣ ੍যࠁदח Ѫਸ ӂ೧٘݀פ׮. A 80 Link: h tt ps://medium.com/androiddevelopers/migrating-from-livedata-to-kotlins- fl ow-379292f419 f ( * ੄৉੉ ੓ਸ ࣻ ੓णפ׮ )

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Q Flowח ঱ઁ Stable੉ ؼөਃ? ؀ࠗ࠙੄ APIח ੉޷ Stableੑפ׮. ୭Ӕ ௏ౣܽ 1.5੉ ҕѐغ঻Ҋ, ૑Ә ߄۽ ࢎਊೞप ࣻ ੓णפ׮. ӒܻҊ উ٘۽੉٘ীࢲ Flowܳ ࢎਊೞח ߑߨҗ ৘ઁ৬ э਷ ޙࢲب ҍ ઁҕೞ۰ ೤פ׮. ૑Ә ࢎਊ೧ࠁࣁਃ! A 81 Link: h tt ps://developer.android.com/kotlin/ fl ow ( * ੄৉੉ ੓ਸ ࣻ ੓णפ׮ )

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Q KMM੉ ҙबਸ ߉Ҋ ੓חؘ, = Kotlin Multiplatform Mobile Jetpack ۄ੉࠳۞ܻب ૑ਗೡ ҅ദ੉ ੓աਃ? ই૒ ҳ୓੸ੋ ҅ദ਷ হणפ׮. Jetpack ۄ੉࠳۞ܻח ೦࢚ উ٘۽੉٘ܳ ਋ࢶਵ۽ Ҋ۰೤פ׮. ӒܻҊ ࣻߔ݅ݺ੄ ѐߊ੗о ࢎਊೞח Jetpack ۄ੉࠳۞ܻܳ ௏ౣܽ ݣ౭೒ۖಬਵ۽ ੘ࢿೞח Ѫ਷ Ӓܻ औ૑ ঋणפ׮. ޛۿ Ӓۧ׮Ҋ ׮ܲ ೒ۖಬਸ ૑ਗೡ ࣻ হ׮ח ੄޷ח ইפҊ, ݣ౭೒ۖಬਸ ૑ਗೞ۰ݶ ݢ੷ ௏ౣܽਵ۽ ੹ജ೧ঠ ೞחؘ, पઁ۽ Jetpack ۄ੉࠳۞ܻо ௏ౣܽਵ۽ ੹ജغӝө૑ח 5֙੉ۄח ҭ੢൤ য়ےदр੉ Ѧ۷णפ׮. ژ Javaܳ Ҋࣻೞח ౵౟ցо ੓׮ח ੼ب ੓णפ׮. ٮۄࢲ ই૒਷ ݺഛೠ ఋ੐ۄੋ੉ হणפ׮. A 82 Link: h tt ps://kotlinlang.org/docs/mobile/home.html ( * ੄৉੉ ੓ਸ ࣻ ੓णפ׮ )

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Q KSP۽ ݃੉Ӓۨ੉࣌ ೡ ҅ദ੉ ੓աਃ? = Kotlin Symbol Processing ֎, ૓೯઺ੑפ׮. KSPח Java੄ annotation processor৬ ਬࢎ೤פ׮. Jetpack ۄ੉࠳۞ܻীח Room੉ա DataBinding୊ۢ ݆਷ annotation processorо ੓חؘਃ. ૑Ә਷ Roomী݅ प೷੸ਵ۽ ઁҕೞҊ ੓णפ׮. KSPо উ੿ചغݶ ׮ܲ ۄ੉࠳۞ܻ੄ annotation processorب ݽف KSP۽ ߸ജೡ ৘੿ੑפ׮. Dagger৬ Hiltب ನೣؾפ׮. Roomਵ۽ పझ౟೮ਸ ٸח ࠽٘ ࣘبо ௼ѱ ѐࢶغ঻णפ׮. খਵ۽ KSPо ঴݃ա ѐࢶೡ ࣻ ੓ਸ૑ ӝ؀ؾפ׮. A 83 Link: h tt ps://github.com/google/ksp ( * ੄৉੉ ੓ਸ ࣻ ੓णפ׮ )

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؊ ա਷ Jetpack੉ غب۾, ੉गח ١۾೧઱ࣁਃ. 👆 84

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Sungyong An Android Developer, NAVER WEBTOON @fornewid Thank you! deveopers.android.com/jetpack androidx.dev speakerdeck.com/fornewid/ whats-new-in-jetpack-2021 Resources 85