DevFest Songdo 2019 ~ 최신 AndroidX 체크

DevFest Songdo-Incheon 2019에서 발표한 자료입니다.

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1. ୭न AndroidX ୓௼ @pluu GDG Songdo - Incheon
2. ୭न AndroidX ୓௼ Google Developer Experts for Android GDG Korea Android Organizer Naver Noh HyeonSeok GDG Songdo - Incheon
3. աח উ٘۽੉٘ ѐߊ੗׮?!
4. ই઱ ࡅܰѱ ૓೯೤פ׮. թ਷ ठۄ੉٘ 102੢ ଵࢳ੗ש, ਍৔੗ש દ࣠೤פ׮. ݈੉ ࡅܳ ѩפ׮
5. Index • Introduction AndroidX • Android Components • AndroidX in Android Dev Summit • Migration GDG Songdo - Incheon
6. What is AndroidX? GDG Songdo - Incheon
7. Question?! 1. AndroidXܳ ٜযࠌ׮? 2. Jetpackਸ ঌҊ੓׮? 3. Support Libraryо ӝরդ׮? 4. Android Architecture Components? 5. ੉ٜ੄ ର੉੼ਸ ঌҊ੓׮?
8. Jetpack ۄ੉࠳۞ܻ, بҳ, о੉٘ ١੄ Ҋಿ૕ জਸ ࣚऔѱ ѐߊਸ ਤೠ ѐߊ ૑ஜ
9. Jetpack == AndroidX - androidx.* ী ੓ח ۄ੉࠳۞ܻٜ - Jetpack Libraries - (ҳ) Support Libraries
10. Jetpack Component AndroidX!!
11. AndroidX Android ౱੉ Jetpack ղীࢲ ۄ੉࠳۞ܻܳ ѐߊ, పझ౟, ಁః૚, ߡ੹ ҙܻ, ୹दೞחؘ ࢎਊೞח য়೑ࣗझ ೐۽ં౟ੑפ׮. https://developer.android.com/jetpack/androidx
12. What's New in Android Support Library (Google I/O ’17)
13. Source : https://www.youtube.com/watch?v=V6-roIeNUY0
14. Source : https://www.youtube.com/watch?v=V6-roIeNUY0
15. Source : https://www.youtube.com/watch?v=V6-roIeNUY0
16. Updated packaging • Android java ࣗझܳ ಁః૑߹۽ ܻಂష݂ ▪ Android.<feature>.ClassName • Maven ▪ androidx.<feature>:<feature>-<sub-feature> ▪ ೙ਃೠ ӝמ߹ ߓನ • -v7, -v4 ಁః૑ݺ ઁѢ
17. AndroidX Component GDG Songdo - Incheon
18. https://developer.android.com/jetpack/androidx/versions/
19. https://developer.android.com/jetpack/androidx/versions/
20. https://developer.android.com/jetpack/androidx/versions/
21. https://developer.android.com/jetpack/androidx/versions/
22. AndroidX Component - Total 70ѐ (2019.11.29) - Support, UI - Benchmark, Migration … etc
23. Activity & Fragment & Navigation - Activity 1.0.0(Stable) , 1.1.0-rc02(RC) - Fragment 1.1.0(Stable) , 1.2.0-rc02(RC) - Navigation 2.1.0(Stable) , 2.2.0-rc02(RC)
24. class OldFragment : Fragment() { // Crazy fun backStart() { requireActivity().onBackPressed() } } җѢ Fragmentীࢲ onBackPressed // Crazy fun backStart() { requireActivity().onBackPressed() } // Safe override fun onAttach(context: Context) { super.onAttach(context) backListener = context as? BackListener backListener?.onBackPressed() }
25. class MainFragment : Fragment() { private val dispatcher by lazy { requireActivity().onBackPressedDispatcher } private val backPressedCallback = object : OnBackPressedCallback(true) { override fun handleOnBackPressed() { // TODO } } override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) dispatcher.addCallback(this, backPressedCallback) } } Fragmentীࢲ onBackPressed ୊ܻ Back Pressed Flag
26. // ComponentActivity.java public class ComponentActivity { private final OnBackPressedDispatcher mOnBackPressedDispatcher = new OnBackPressedDispatcher(new Runnable() { @Override public void run() { // fallbackOnBackPressed ComponentActivity.super.onBackPressed(); } }); @Override @MainThread public void onBackPressed() { mOnBackPressedDispatcher.onBackPressed(); } } // OnBackPressedDispatcher.java public final class OnBackPressedDispatcher { @MainThread public void onBackPressed() { Iterator<OnBackPressedCallback> iterator = mOnBackPressedCallbacks.descendingIterator(); while (iterator.hasNext()) { OnBackPressedCallback callback = iterator.next(); if (callback.isEnabled()) { callback.handleOnBackPressed(); return; } } if (mFallbackOnBackPressed != null) { mFallbackOnBackPressed.run(); } } } ComponentActivity / BackPressedDispatcher ൒ܴ
27. // ComponentActivity.java public class ComponentActivity { private final OnBackPressedDispatcher mOnBackPressedDispatcher = new OnBackPressedDispatcher(new Runnable() { @Override public void run() { // fallbackOnBackPressed ComponentActivity.super.onBackPressed(); } }); @Override @MainThread public void onBackPressed() { mOnBackPressedDispatcher.onBackPressed(); } } // OnBackPressedDispatcher.java public final class OnBackPressedDispatcher { @MainThread public void onBackPressed() { Iterator<OnBackPressedCallback> iterator = mOnBackPressedCallbacks.descendingIterator(); while (iterator.hasNext()) { OnBackPressedCallback callback = iterator.next(); if (callback.isEnabled()) { callback.handleOnBackPressed(); return; } } if (mFallbackOnBackPressed != null) { mFallbackOnBackPressed.run(); } } } ComponentActivity / BackPressedDispatcher ൒ܴ
28. // ComponentActivity.java public class ComponentActivity { private final OnBackPressedDispatcher mOnBackPressedDispatcher = new OnBackPressedDispatcher(new Runnable() { @Override public void run() { // fallbackOnBackPressed ComponentActivity.super.onBackPressed(); } }); @Override @MainThread public void onBackPressed() { mOnBackPressedDispatcher.onBackPressed(); } } ComponentActivity / BackPressedDispatcher ൒ܴ // OnBackPressedDispatcher.java public final class OnBackPressedDispatcher { @MainThread public void onBackPressed() { Iterator<OnBackPressedCallback> iterator = mOnBackPressedCallbacks.descendingIterator(); while (iterator.hasNext()) { OnBackPressedCallback callback = iterator.next(); if (callback.isEnabled()) { callback.handleOnBackPressed(); return; } } if (mFallbackOnBackPressed != null) { mFallbackOnBackPressed.run(); } } }
29. // ComponentActivity.java public class ComponentActivity { private final OnBackPressedDispatcher mOnBackPressedDispatcher = new OnBackPressedDispatcher(new Runnable() { @Override public void run() { // fallbackOnBackPressed ComponentActivity.super.onBackPressed(); } }); @Override @MainThread public void onBackPressed() { mOnBackPressedDispatcher.onBackPressed(); } } // OnBackPressedDispatcher.java public final class OnBackPressedDispatcher { @MainThread public void onBackPressed() { Iterator<OnBackPressedCallback> iterator = mOnBackPressedCallbacks.descendingIterator(); while (iterator.hasNext()) { OnBackPressedCallback callback = iterator.next(); if (callback.isEnabled()) { callback.handleOnBackPressed(); return; } } if (mFallbackOnBackPressed != null) { mFallbackOnBackPressed.run(); } } } ComponentActivity / BackPressedDispatcher ൒ܴ
30. // ComponentActivity.java public class ComponentActivity { private final OnBackPressedDispatcher mOnBackPressedDispatcher = new OnBackPressedDispatcher(new Runnable() { @Override public void run() { // fallbackOnBackPressed ComponentActivity.super.onBackPressed(); } }); @Override @MainThread public void onBackPressed() { mOnBackPressedDispatcher.onBackPressed(); } } // OnBackPressedDispatcher.java public final class OnBackPressedDispatcher { @MainThread public void onBackPressed() { Iterator<OnBackPressedCallback> iterator = mOnBackPressedCallbacks.descendingIterator(); while (iterator.hasNext()) { OnBackPressedCallback callback = iterator.next(); if (callback.isEnabled()) { callback.handleOnBackPressed(); return; } } if (mFallbackOnBackPressed != null) { mFallbackOnBackPressed.run(); } } } ComponentActivity / BackPressedDispatcher ൒ܴ
31. LiveData & ViewModel - Lifecycle 2.1.0(Stable) , 2.2.0-rc02(RC)
32. ViewModel ୡӝച lifecycle-viewmodel private val viewModel by lazy { ViewModelProviders.of(this).get<MainViewModel>() } This constructor was deprecated in API level 1.1.0. This class should not be directly instantiated
33. ViewModel ୡӝച lifecycle-viewmodel val vm: VM = ViewModelProvider(this, factory).get(VM::class.java) val vm: VM = ViewModelProvider(this).get(VM::class.java) public ViewModelProvider(@NonNull ViewModelStoreOwner owner) { this(owner.getViewModelStore(), owner instanceof HasDefaultViewModelProviderFactory ? ((HasDefaultViewModelProviderFactory) owner).getDefaultViewModelProviderFactory() : NewInstanceFactory.getInstance()); }
35. Support Coroutines in ViewModel After lifecycle-viewmodel-ktx 2.1.0 val ViewModel.viewModelScope: CoroutineScope get() { val scope: CoroutineScope? = this.getTag(JOB_KEY) if (scope != null) { return scope } return setTagIfAbsent(JOB_KEY, CloseableCoroutineScope(SupervisorJob() + Dispatchers.Main.immediate)) } To be continue…
36. AndroidX in
37. #AndroidDevSummit
38. #AndroidDevSummit
39. #AndroidDevSummit
40. #AndroidDevSummit
41. #AndroidDevSummit @Composable fun FilteredList(contacts: List<Contact>, filterText: String = "") { val state = +state { filterText } VerticalScroller { Column { TextField(filterText, onValueChange = { state.value = it }) contacts.filter { it.contains(state.value) }.forEach { Row { Image(it.photo) Text(it.name) } } } } }
42. #AndroidDevSummit • Simplify • Fix what’s broken • No more cheating • Material + Animations • Compatibility Jetpack Compose
43. #AndroidDevSummit Android Studio Live preview, Apply Changes Compose Compiler Plugin Code generation extensions kotlinc Upstream Kotlin compiler (1.4) Compose UI Foundation Standard layouts, interactions Compose UI Core Input, Measure, Layout, Drawing Compose Runtime Tree management, Effects Compose UI Material Surface, Buttons, Tabs, Themes Compose Build time (development host) Runtime (on device)
44. #AndroidDevSummit Compose UI Foundation Standard layouts, interactions Compose UI Core Input, Measure, Layout, Drawing Compose UI Material Surface, Buttons, Tabs, Themes BUTTON Gestures, accessibility, & other internals
45. Jetpack Compose • I/O 19, Unbundled • Announced Android Studio 4.0 Canary 1 in Android Dev Summit • Last Release 0.1.0-dev02
46. android/compose-samples https://github.com/android/compose-samples/tree/master/JetNews
47. android/compose-samples https://github.com/android/compose-samples/tree/master/JetNews
48. android/compose-samples https://github.com/android/compose-samples/tree/master/JetNews
49. Compose Sample
50. Compose Sample https://github.com/Pluu/JetpackCompose_Sample
51. Merged ConstraintLayout in Compose Link : http://bit.ly/2rIbAao
52. ੉ઁ খਵ۽ 54੢ թও֎ਃ!!
54. #AndroidDevSummit
55. #AndroidDevSummit Using FragmentScenario @Test fun testEventFragment() { val scenario = launchFragmentInContainer<MyFragment>() onView(withId(R.id.refresh)).perform(click()) scenario.onFrament { fragment -> // Check that the fragment handled the click correctly. } }
56. #AndroidDevSummit Using FragmentScenario @Test fun testEventMoveToCreatedFragment() { val scenario = launchFragmentInContainer<MyFragment>() scenario.moveToState(State.CREATED) } @Test fun testEventFragment() { val scenario = launchFragmentInContainer<MyFragment>() scenario.recreate() }
57. #AndroidDevSummit Using FragmentFactory private class MyFactory() : FragmentFactory() { override fun instantiate( classLoader: ClassLoader, className: String ) = when (className) { MyFragment::class.java.name -> MyFragment(...) else -> super.instantiate(classLoader, className) } } override fun onCreate(savedInstanceState: Bundle?) { supportFragmentManager.fragmentFactory = MyFactory() super.onCreate(savedInstanceState) }
58. used add/replace
62. FragmentContainerView extends FrameLayout • Fragmentਊ Container ◦ AddView => IllegalStateException • <fragment> / <FrameLayout>ܳ ؀୓ • Z-index ޙઁ ೧Ѿ • 3о૑ ੘সਸ ૓೯ ◦ ࢜۽਍ Fragment ੋझఢझ ࢤࢿ ◦ Fragment.onInflate(Context, AttributeSet, Bundle) ഐ୹ ◦ FragmentTransactionਸ प೯ೞৈ FragmentManagerী ୶о
63. FragmentContainerView <androidx.fragment.app.FragmentContainerView xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" android:id="@+id/fragment_container_view" android:layout_width="match_parent" android:layout_height="match_parent" />
64. FragmentContainerView <androidx.fragment.app.FragmentContainerView xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" android:id="@+id/fragment_container_view" android:name="com.example.MyFragment" android:tag="my_tag" android:layout_width="match_parent" android:layout_height="match_parent" />
65. // FirstFragment, SecondFragment parentFragmentManager .beginTransaction() .setCustomAnimations( R.anim.nav_enter, R.anim.nav_exit ) .replace(R.id.container, /**...*/ ) .addToBackStack(null) .commit() FrameLayout Not desired result
66. FrameLayout FragmentContainerView
67. ViewModel ୡӝച // activity-ktx val activityVM : ActivityViewModel by viewModels() // fragment-ktx val fragmentViewModel : MyViewModel by viewModels() val activityViewModel : MyViewModel by activityViewModels() // navigation-ktx val navGraphViewModel: MyViewModel by navGraphViewModels(R.id.main)
68. #AndroidDevSummit
69. ROOM #AndroidDevSummit • RxJava/Coroutines ૑ਗ • Raw ௪ܻ ૑ਗ • AndroidX ݃੉Ӓۨ੉࣌ • Full Text Search • Views • SQLiteী ؀ೠ ୶࢚ച ҅க ઁҕ • ஹ౵ੌ ఋ੐ী Query ୓௼ • Migration੉ ए਑ • పझ౟ೞӝ ए਑ • Last 2.2.2(Stable)
70. #AndroidDevSummit Async queres Query Type Observable Read One-Shot Read / Write Lifecycle RxJava Coroutines LiveData Publisher, Observable, Flowable Flowable N/A Single, Maybe, Completale suspend fun New!
71. Flow 101 - Kotlin coroutine primitive - Asynchronous - Cold stream • transform stream (e.g. map, filter) • consume data (e.g. collect, single, toList)
72. Flow Example fun getDogsToPet(limit: Int = -1): Flow<Dog> = flow { var i = 0 while (limit < 0 || i > limit) { emit(getRandomDog()) i++ } }
73. Flow Example https://twitter.com/FMuntenescu/status/1186484362327384064
74. Pre-packaged databases #AndroidDevSummit
75. ୡӝ DB ؘ੉ఠ ࢸ஖ (җѢ) 1. Database ৌӝ 2. Schema Ѩૐ 3. Database File ਫ਼Ә 4. Thread زӝച 5. Content ࠂࢎ 6. Database ײӝ #AndroidDevSummit
76. #AndroidDevSummit Room.databaseBuilder(appContext, TestDatabase.class, "Sample.db") .createFromFile(File("mypath")) .build() Room.databaseBuilder(appContext, TestDatabase.class, "Sample.db") .createFromAsset("database/myapp.db") .build() New! New!
77. Definition Relations - One-to-One - Many-to-Many #AndroidDevSummit
78. One-to-One Example
79. One-to-Many Example
80. #AndroidDevSummit
81. #AndroidDevSummit Coroutines
82. #AndroidDevSummit • Easy to get off main thread • Minimal boilerplate • Structured concurrency = managed jobs Coroutines ੢੼
83. #AndroidDevSummit ViewModel class MainActivityViewModel : ViewModel { init { viewModelScope.launch { // start } } }
84. #AndroidDevSummit class MyActivity : Activity { override fun onCreate(state: Bundle?) { super.onCreate(state) lifecycleScope.launch { // Run } lifecycleScope.launchWhenResumed { // Run } } } Activities & Fragments lifecycleScope.launchWhenResumed { // Run }
85. #AndroidDevSummit ViewModel + LiveData class MainActivityViewModel : ViewModel { private val _result = MutableLiveData<String>() val result = LiveData<String> = _result init { viewModelScope.launch { val computationResult = doComputation() _result.value = computationResult } } }
86. #AndroidDevSummit liveData coroutine builder class MyViewModel { val result = liveData { emit(doComputation()) } } After lifecycle 2.2 liveData(Dispatchers.IO) { emit(LOADING.STRING) emitSource(dataSource.fetchWeather()) } 1 2 LiveData
87. #AndroidDevSummit After lifecycle 2.2 Multiple values with LiveData
88. #AndroidDevSummit After lifecycle 2.2 Streams with Flow
89. emit N Values val currentWeather: LiveData<String> = dataSource.fetchWeather() LiveData → LiveData Flow → LiveData val currentWeatherFlow: LiveData<String> = liveData { dataSource.fetchWeatherFlow().collect { emit(it) } }
90. emit N Values LiveData → LiveData Flow → LiveData val currentWeather: LiveData<String> = dataSource.fetchWeather() val currentWeatherFlow: LiveData<String> = dataSource.fetchWeatherFlow().asLiveData()
91. emit 1 + emit N Values val currentWeather: LiveData<String> = liveData { emit(LOADING_STRING) emitSource(dataSource.fetchWeather()) } LiveData → LiveData Flow → LiveData val currentWeatherFlow: LiveData<String> = liveData { emit(LOADING_STRING) emitSource( dataSource.fetchWeatherFlow().asLiveData() ) }
92. emit 1 + emit N Values val currentWeather: LiveData<String> = liveData { emit(LOADING_STRING) emitSource(dataSource.fetchWeather()) } LiveData → LiveData Flow → LiveData val currentWeatherFlow: LiveData<String> = dataSource.fetchWeatherFlow() .onStart { emit(LOADING_STRING) } .asLiveData()
93. Transformation val currentWeather: LiveData<String> = dataSource.fetchWeather().map { // Run } LiveData → LiveData
94. Suspend transformation val currentWeather: LiveData<String> = dataSource.fetchWeather().switchMap { liveData { emit(heavyTransformation(it)) } } LiveData → LiveData
95. Suspend transformation val currentWeather: LiveData<String> = dataSource.fetchWeather().switchMap { liveData { emit(heavyTransformation(it)) } } LiveData → LiveData val currentWeatherFlow: LiveData<String> = dataSource.fetchWeatherFlow() .map { heavyTransformation(it) } .asLiveData() } Flow → LiveData
96. Migration to AndroidX GDG Songdo - Incheon
97. https://developer.android.com/topic/libraries/support-library/revisions
98. FIRST backup backup backup backup backup backup backup backup backup backup backup backup backup backup backup backup backup backup backup backup backup backup backup backup backup backup backup backup backup backup
99. Not Support Code generation libraries
100. Migration • Menu Bar Refactor > Migrate to AndroidX ࢶఖ • External Librariesী AndroidX ޷֢୹द Opt 1. Gradle Sync Opt 2. Invalidate Caches / Restart • 100% ߸ജ੉ উؼ ࣻ ੓ਵ޲۽ ѐੋ੸ਵ۽ ࣻز੉ উ੿੸
101. Migration to AndroidX • Support Libraryח Deprecate • ঱ઃо ೧ঠೡ ੘স਷ ؊ ੉࢚ ইפ׮ • Release Android 10 (2019.09.03) • ࢲ࠺झ੄ ઱ਃ ױ݈੄ Android 10 সؘ੉౟ दӝ ୓௼
102. #AndroidDevSummit goo.gle/plaid-androidx-migration
103. Stable Activity AppCompat Lifecycle Navigation Room Work Autofill Benchmark Biometric Coordinator Layout Fragment Lifecycle ViewModel-SavedState Navigation RecyclerView ViewPager2 ConstraintLayout RC Beta Alpha Ads Browser Camera Car Compose Security
104. Watch the talks and learn more! Android Dev Summit 2019
105. Watch the talks and learn more! Android Dev Summit 2019 END