LiveData<🤖> vs Observable<Rx> vs Channel<Kt>

All these classes can be used to handle a flow of data in your Android app. This presentation goes through a specific use case, and how these classes differ in their implementations of managing and observing data.

Transcript

1. LiveData< > vs Observable< > vs Channel< >
2. Jacques Smuts • ??? • 2014 - Started Coding Android • 2018 - Started Coding Kotlin + RxJava • 2019 - Started Using Coroutines + LiveData @JacquesSmuts GDG Cape Town JacquesSmuts.com
3. REACTIVE PROGRAMMING !
4. REACTIVE PROGRAMMING !
5. Observable Observer Emit
6. Observable Observer Emit
7. Observable Observer Emit
8. Observable Observer Emit
9. Observable Observer Emit
10. Observable/Publisher/Emitter/Subject/Channel/Flowable Observer/Subscriber/Disposable/Receiver/Consumer/Collector Emit/Publish/ Send/Broadcast
11. Observable/Publisher/Emitter/Subject/Channel/Flowable Observer/Subscriber/Disposable/Receiver/Consumer/Collector Emit/Publish/ Send/Broadcast
12. Observable/Publisher/Emitter/Subject/Channel/Flowable Observer/Subscriber/Disposable/Receiver/Consumer/Collector Emit/Publish/ Send/Broadcast
13. Observable/Publisher/Emitter/Subject/Channel/Flowable Observer/Subscriber/Disposable/Receiver/Consumer/Collector Emit/Publish/ Send/Broadcast
14. Observable< > vs Database Observable< > vs Binding Observable< > vs Observable< > vs Flow< > vs LiveData Observable< > vs Observable< > vs
15. 3 Observables
16. 3 Observables • LiveData<T>
17. 3 Observables • LiveData<T> • io.reactivex.Observable<T>
18. 3 Observables • LiveData<T> • io.reactivex.Observable<T> • kotlinx.coroutines.channels.Channel<T>
19. 3 Observables • LiveData<T> • io.reactivex.Observable<T> • kotlinx.coroutines.channels.Channel<T>
20. 3 Observables • LiveData<T> • io.reactivex.Observable<T> • kotlinx.coroutines.channels.Channel<T> Flowable<T> equivalenty
21. 3 Observables • LiveData<T> • io.reactivex.Observable<T> • kotlinx.coroutines.channels.Channel<T> Flow<T> Flowable<T> equivalenty related
22. LiveData< >
23. LiveData< >
24. LiveData< > • Built into Android AppCompat Library
25. LiveData< > • Built into Android AppCompat Library • Is meant to provide up-to-date data to UI
26. LiveData< > • Built into Android AppCompat Library • Is meant to provide up-to-date data to UI • Tied to Activity/Fragment lifecycle to prevent leaks/crashes
27. LiveData< > • Built into Android AppCompat Library • Is meant to provide up-to-date data to UI • Tied to Activity/Fragment lifecycle to prevent leaks/crashes • Reliable, easy, simple
28. LiveData< > • Built into Android AppCompat Library • Is meant to provide up-to-date data to UI • Tied to Activity/Fragment lifecycle to prevent leaks/crashes • Reliable, easy, simple • Good for beginners
29. LiveData< > • Built into Android AppCompat Library • Is meant to provide up-to-date data to UI • Tied to Activity/Fragment lifecycle to prevent leaks/crashes • Reliable, easy, simple • Good for beginners
30. Activity/ Fragment (onCreate) The Worst Way
31. Activity/ Fragment (onCreate) Hardcoded URL The Worst Way
32. Activity/ Fragment (onCreate) Hardcoded URL The Worst Way get Email
33. Activity/ Fragment (onCreate) Hardcoded URL The Worst Way email@ address.com
34. Slightly Better Activity/ Fragment (onCreate)
35. Slightly Better Activity/ Fragment (onCreate) ViewModel
36. Slightly Better Activity/ Fragment (onCreate) ViewModel Repository (Database)
37. Slightly Better Activity/ Fragment (onCreate) API Service ViewModel Repository (Database)
38. Slightly Better Activity/ Fragment (onCreate) API Service ViewModel Repository (Database) get Email get Email
39. Slightly Better Activity/ Fragment (onCreate) API Service ViewModel Repository (Database) oldEmail@ address.com get Email
40. Slightly Better Activity/ Fragment (onCreate) API Service ViewModel Repository (Database) oldEmail@ address.com newEmail@ address.com newEmail@ address.com
41. LiveData<> Activity/ Fragment (onCreate)
42. LiveData<> Activity/ Fragment (onCreate) API Service Repository (Database) ViewModel
43. LiveData<> Activity/ Fragment (onCreate) API Service Repository (Database) LiveData ViewModel
44. LiveData<> Activity/ Fragment (onCreate) API Service Repository (Database) LiveData oldEmail@ address.com ViewModel
45. LiveData<> Activity/ Fragment (onCreate) API Service Repository (Database) LiveData oldEmail@ address.com ViewModel update Email
46. LiveData<> Activity/ Fragment (onCreate) API Service Repository (Database) LiveData oldEmail@ address.com newEmail@ address.com ViewModel
47. LiveData<> Activity/ Fragment (onCreate) API Service Repository (Database) LiveData oldEmail@ address.com newEmail@ address.com ViewModel
48. LiveData<> Observer class UserFragment/Activity { override fun onCreate(savedInstanceState: Bundle?) { } }
49. LiveData<> Observer class UserFragment/Activity { override fun onCreate(savedInstanceState: Bundle?) { } }
50. LiveData<> Observer class UserFragment/Activity { override fun onCreate(savedInstanceState: Bundle?) { userViewModel.liveEmail.observe(this, Observer { email -> updateUi(email) }) } }
51. LiveData<> Observer class UserFragment/Activity { override fun onCreate(savedInstanceState: Bundle?) { userViewModel.liveEmail.observe(this, Observer { email -> updateUi(email) }) } } LifecycleOwner
52. LiveData<> Observer class UserFragment/Activity { override fun onCreate(savedInstanceState: Bundle?) { userViewModel.liveEmail.observe(this, Observer { email -> updateUi(email) }) } } LifecycleOwner null?
53. LiveData<> Observer class UserFragment/Activity { override fun onCreate(savedInstanceState: Bundle?) { userViewModel.liveEmail.observe(this, Observer { email -> updateUi(email) }) } } LifecycleOwner null? val liveEmail: LiveData<String>
54. LiveData<> Observer class UserFragment/Activity { override fun onCreate(savedInstanceState: Bundle?) { userViewModel.liveEmail.observeNonNull(this) { email -> updateUi(email) }) } }
55. LiveData<> Observer class UserFragment/Activity { override fun onCreate(savedInstanceState: Bundle?) { userViewModel.liveEmail.observeNonNull(this) { email -> updateUi(email) }) } }
56. LiveData<> Activity/ Fragment (onCreate) API Service Repository (Database) LiveData newEmail@ address.com ViewModel
57. LiveData<> Observable class UserViewModel { val liveEmail: LiveData<String> = ? }
58. LiveData<> Observable class UserViewModel { val liveEmail: LiveData<String> = ? }
59. class UserViewModel { val roomDatabaseRepository = RoomDatabaseRepository .getInstance() val liveEmail: LiveData<String> get() = roomDatabaseRepository.getLiveEmail() } LiveData<> Observable
60. class UserViewModel { val _liveEmail = MutableLiveData<String>() } LiveData<> Observable
61. class UserViewModel { val _liveEmail = MutableLiveData<String>() fun updateEmail(email: String) { _liveEmail.postValue(email) } } LiveData<> Observable
62. class UserViewModel { val _liveEmail = MutableLiveData<String>() fun updateEmail(email: String) { _liveEmail.postValue(email) } } Automatically on UI Thread LiveData<> Observable
63. class UserViewModel { val _liveEmail = MutableLiveData<String>() fun updateEmail(email: String) { _liveEmail.postValue(email) } } Automatically on UI Thread LiveData<> Observable liveEmail.value == [last value]
64. class UserViewModel { val _liveEmail = MutableLiveData<String>() fun updateEmail(email: String) { _liveEmail.postValue(email) } } LiveData<> Observable
65. class UserViewModel { private val _liveEmail = MutableLiveData<String>() val liveEmail: LiveData<String> get() = liveEmailMutable fun updateEmail(email: String) { _liveEmail.postValue(email) } } LiveData<> Observable
66. class UserViewModel { private val _liveEmail = MutableLiveData<String>() val liveEmail: LiveData<String> get() = liveEmailMutable fun updateEmail(email: String) { _liveEmail.postValue(email) } } LiveData<> Observable
67. LiveData<> Activity/ Fragment (onCreate) API Service Repository (Database) LiveData ViewModel
68. LiveData<> Activity/ Fragment (onCreate) API Service Repository (Database) LiveData oldEmail@ address.com ViewModel
69. LiveData<> Activity/ Fragment (onCreate) API Service Repository (Database) LiveData oldEmail@ address.com ViewModel update Email
70. LiveData<> Activity/ Fragment (onCreate) API Service Repository (Database) LiveData oldEmail@ address.com newEmail@ address.com ViewModel
71. LiveData<> Activity/ Fragment (onCreate) API Service Repository (Database) LiveData oldEmail@ address.com newEmail@ address.com ViewModel
72. LiveData<> Activity/ Fragment (onDestroy) API Service Repository (Database) LiveData ViewModel newEmail@ address.com
73. LiveData<> Activity/ Fragment (onDestroy) API Service Repository (Database) ViewModel newEmail@ address.com
74. LiveData<> Activity/ Fragment (onDestroy) API Service Repository (Database) newEmail@ address.com
75. LiveData<> API Service Repository (Database) newEmail@ address.com
76. Observable< >
79. Observable< >
80. Observable< > • Difficult to understand at first
81. Observable< > • Difficult to understand at first • Large Library
82. Observable< > • Difficult to understand at first • Large Library • Long History
83. Observable< > • Difficult to understand at first • Large Library • Long History • Powerful and can adapt to any situation
84. Observable< > • Difficult to understand at first • Large Library • Long History • Powerful and can adapt to any situation
85. RxJava Activity/ Fragment (onStart) ViewModel
86. RxJava Activity/ Fragment (onStart) API Service Repository (Database) ViewModel
87. RxJava Activity/ Fragment (onStart) API Service Repository (Database) Observable ViewModel
88. RxJava Activity/ Fragment (onStart) API Service Repository (Database) Observable ViewModel oldEmail@ address.com
89. RxJava Activity/ Fragment (onStart) API Service Repository (Database) Observable ViewModel oldEmail@ address.com State
90. RxJava Activity/ Fragment (onStart) API Service Repository (Database) Observable ViewModel oldEmail@ address.com State
91. RxJava Activity/ Fragment (onStart) API Service Repository (Database) Observable ViewModel update Email oldEmail@ address.com State SERVER
92. RxJava Activity/ Fragment (onStart) API Service Repository (Database) Observable ViewModel oldEmail@ address.com State SERVER
93. RxJava Activity/ Fragment (onStart) API Service Repository (Database) Observable ViewModel oldEmail@ address.com State SERVER newEmail@ address.com
94. RxJava Activity/ Fragment (onStart) API Service Repository (Database) Observable ViewModel oldEmail@ address.com State SERVER newEmail@ address.com
95. RxJava Observer class UserFragment/Activity { override fun onCreate(savedInstanceState: Bundle?) { } }
96. RxJava Observer class UserFragment/Activity { override fun onCreate(savedInstanceState: Bundle?) { } }
97. class AnyClass { init { } } RxJava Observer
98. class UserFragment/Activity { override fun onCreate(savedInstanceState: Bundle?) { } } RxJava Observer
99. class UserFragment/Activity { override fun onCreate(savedInstanceState: Bundle?) { userViewModel.observableState .subscribe { state -> updateUi(state) } } } RxJava Observer
100. class UserFragment/Activity { override fun onCreate(savedInstanceState: Bundle?) { userViewModel.observableState .subscribe { state -> updateUi(state) }, { error -> logError(error) } } } RxJava Observer
101. class UserFragment/Activity { override fun onCreate(savedInstanceState: Bundle?) { userViewModel.observableState .subscribe { state -> updateUi(state) }, { error -> logError(error) } } } Semi-auto error catching RxJava Observer
102. class UserFragment/Activity { override fun onCreate(savedInstanceState: Bundle?) { userViewModel.observableState .subscribe { state -> updateUi(state) }, { error -> logError(error) } } } RxJava Observer
103. class UserFragment/Activity { override fun onCreate(savedInstanceState: Bundle?) { userViewModel.observableState .throttleLast(100, TimeUnit.Milliseconds) .subscribe { state -> updateUi(state) }, { error -> logError(error) } } } RxJava Observer
104. class UserFragment/Activity { override fun onCreate(savedInstanceState: Bundle?) { userViewModel.observableState .distinctUntilChanged() .subscribe { state -> updateUi(state) }, { error -> logError(error) } } } RxJava Observer
105. class UserFragment/Activity { override fun onCreate(savedInstanceState: Bundle?) { userViewModel.observableState .subscribe { state -> updateUi(state) }, { error -> logError(error) } } } RxJava Observer
106. class UserFragment/Activity { val disposables = CompositeDisposable() override fun onCreate(savedInstanceState: Bundle?) { disposables.add(userViewModel.observableState .subscribe { state -> updateUi(state.email) }, { error -> logError(error) }) } } RxJava Observer
107. class UserFragment/Activity { val disposables = CompositeDisposable() override fun onCreate(savedInstanceState: Bundle?) { disposables.add(userViewModel.observableState .subscribe { state -> updateUi(state.email) }, { error -> logError(error) }) } } disposables.clear() RxJava Observer
108. class UserFragment/Activity { val disposables = CompositeDisposable() override fun onCreate(savedInstanceState: Bundle?) { disposables.add(userViewModel.observableState .subscribe { state -> updateUi(state.email) }, { error -> logError(error) }) } } RxJava Observer
109. class UserFragment/Activity { val disposables = CompositeDisposable() override fun onCreate(savedInstanceState: Bundle?) { disposables.add(userViewModel.observableState .subscribe { state -> updateUi(state.email) }, { error -> logError(error) }) } } RxJava Observer
110. RxJava Activity/ Fragment (onStart) API Service Repository (Database) Observable ViewModel oldEmail@ address.com State
111. RxJava Observable class UserViewModel { val observableEmail: Observable<String> = ? }
112. RxJava Observable class UserViewModel { val observableEmail: Observable<String> = ? }
113. class UserViewModel { val roomDatabaseRepository = RoomDatabaseRepository .getInstance() val observableEmail: Flowable<String> get() = roomDatabaseRepository.getEmail() } RxJava Observable
114. class UserViewModel { val roomDatabaseRepository = RoomDatabaseRepository .getInstance() val observableEmail: Flowable<String> get() = roomDatabaseRepository.getEmail() } Observable<String> RxJava Observable
115. class UserViewModel { val _stateObservable = PublishSubject<State>() } RxJava Observable
116. class UserViewModel { val _stateObservable = PublishSubject<State>() } RxJava Observable Does not retain State
117. class UserViewModel { val _stateObservable = PublishSubject<State>() } RxJava Observable
118. class UserViewModel { val _stateObservable = PublishSubject<State>() fun updateState(email: String) { _stateObservable.onNext(State(email)) } } RxJava Observable
119. class UserViewModel { private val _stateObservable = PublishSubject<State>() val stateObservable get()= _stateObservable.hide() fun updateState(email: String) { _stateObservable.onNext(State(email)) } } RxJava Observable
120. class UserViewModel { private val _stateObservable = PublishSubject<State>() val stateObservable get()= _stateObservable.hide() fun updateState(email: String) { _stateObservable.onNext(State(email)) } } RxJava Observable
121. RxJava Activity/ Fragment (onStart) API Service Repository (Database) Observable ViewModel oldEmail@ address.com State
122. RxJava Activity/ Fragment (onStart) API Service Repository (Database) Observable ViewModel update Email oldEmail@ address.com State
123. RxJava Activity/ Fragment (onStart) API Service Repository (Database) Observable ViewModel update Email oldEmail@ address.com State SERVER
124. RxJava Activity/ Fragment (onStart) API Service Repository (Database) Observable ViewModel oldEmail@ address.com State SERVER newEmail@ address.com
125. RxJava Activity/ Fragment (onStart) API Service Repository (Database) Observable ViewModel oldEmail@ address.com State SERVER newEmail@ address.com
126. RxJava Activity/ Fragment (onStop) API Service Repository (Database) ViewModel newEmail@ address.com Observable State
127. RxJava Activity/ Fragment (onStop) API Service Repository (Database) ViewModel newEmail@ address.com Observable State
128. RxJava Activity/ Fragment (onStop) API Service Repository (Database) ViewModel newEmail@ address.com Observable State
129. RxJava Activity/ Fragment (onStop) API Service Repository (Database) ViewModel newEmail@ address.com State
130. RxJava Activity/ Fragment (onStop) API Service Repository (Database) newEmail@ address.com
131. RxJava API Service Repository (Database) newEmail@ address.com
132. Channel< >/Flow
133. Channel< >/Flow
134. Channel< >/Flow • Experimental
135. Channel< >/Flow • Experimental • Amazing community
136. Channel< >/Flow • Experimental • Amazing community • Readable Code
137. Channel< >/Flow • Experimental • Amazing community • Readable Code • One small part of Coroutines Library
138. Channel< >/Flow • Experimental • Amazing community • Readable Code • One small part of Coroutines Library • Is The Future
139. Channel< >/Flow • Experimental • Amazing community • Readable Code • One small part of Coroutines Library • Is The Future
140. Channel/Flow Activity/ Fragment (onCreate) API Service Repository (Database) ViewModel
141. Channel/Flow Activity/ Fragment (onCreate) API Service Repository (Database) ViewModel State
142. Channel/Flow Activity/ Fragment (onCreate) API Service Repository (Database) Flow ViewModel State
143. Channel/Flow Activity/ Fragment (onCreate) API Service Repository (Database) Flow ViewModel oldEmail@ address.com State
144. Channel/Flow Activity/ Fragment (onCreate) API Service Repository (Database) Flow ViewModel update Email oldEmail@ address.com State SERVER
145. Channel/Flow Activity/ Fragment (onCreate) API Service Repository (Database) Flow ViewModel oldEmail@ address.com State SERVER newEmail@ address.com
146. Channel/Flow Activity/ Fragment (onCreate) API Service Repository (Database) Flow ViewModel oldEmail@ address.com State SERVER newEmail@ address.com
147. Channel/Flow Observer class UserFragment/Activity { override fun onCreate(savedInstanceState: Bundle?) { } }
148. Channel/Flow Observer class UserFragment/Activity { override fun onCreate(savedInstanceState: Bundle?) { } }
149. Channel/Flow Observer class UserFragment/Activity, CoroutineScope by MainScope() { override fun onCreate(savedInstanceState: Bundle?) { } }
150. Channel/Flow Observer class UserFragment/Activity, CoroutineScope by MainScope() { override fun onCreate(savedInstanceState: Bundle?) { launch { } } }
151. Channel/Flow Observer class UserFragment/Activity, CoroutineScope by MainScope() { override fun onCreate(savedInstanceState: Bundle?) { launch { userViewModel.stateFlow .collect { state -> updateUi(state) } } } }
152. Channel/Flow Observer class UserFragment/Activity, CoroutineScope by MainScope() { override fun onCreate(savedInstanceState: Bundle?) { launch { userViewModel.stateFlow .collect { state -> updateUi(state) } } } } All coroutines in scope cleaned up by 
 coroutineContext.cancelChildren()
153. Channel/Flow Observer class UserFragment/Activity, CoroutineScope by MainScope() { override fun onCreate(savedInstanceState: Bundle?) { launch { userViewModel.stateFlow .collect { state -> updateUi(state) } } } }
154. Channel/Flow Observer class UserFragment/Activity, CoroutineScope by MainScope() { override fun onCreate(savedInstanceState: Bundle?) { launch { userViewModel.stateFlow .throttleLast(100, TimeUnit.Millisecond) .collect { state -> updateUi(state) } } } }
155. Channel/Flow Observer class UserFragment/Activity, CoroutineScope by MainScope() { override fun onCreate(savedInstanceState: Bundle?) { launch { userViewModel.stateFlow .debounce() .collect { state -> updateUi(state) } } } }
156. Channel/Flow Observer class UserFragment/Activity, CoroutineScope by MainScope() { override fun onCreate(savedInstanceState: Bundle?) { launch { userViewModel.stateFlow .distinctUntilChanged() .collect { state -> updateUi(state) } } } }
157. Channel/Flow Observer class UserFragment/Activity, CoroutineScope by MainScope() { override fun onCreate(savedInstanceState: Bundle?) { launch { userViewModel.stateFlow .distinctUntilChanged() .collect { state -> updateUi(state) } } } }
158. Channel/Flow Activity/ Fragment (onCreate) API Service Repository (Database) Flowable ViewModel State
159. Coroutines Observable class UserViewModel { val emailFlow: Flow<String> = ? }
160. Coroutines Observable class UserViewModel { val emailFlow: Flow<String> = ? }
161. class UserViewModel { val roomDatabaseRepository = RoomDatabaseRepository .getInstance() val emailFlow: Flow<String> get() = roomDatabaseRepository.getEmail() } Coroutines Observable
162. class UserViewModel { val stateObservable = BroadcastChannel<State>(1) } Coroutines Observable
163. class UserViewModel { val stateObservable = BroadcastChannel<State>(1) } Coroutines Observable Capacity of 1
164. class UserViewModel { val stateObservable = BroadcastChannel<State>(1) } Coroutines Observable
165. class UserViewModel { val stateObservable = BroadcastChannel<State>(1) fun updateState(email: String) { stateObservable.offer(State(email)) } } Coroutines Observable
166. class UserViewModel { val stateObservable = BroadcastChannel<State>(1) fun updateState(email: String) { stateObservable.offer(State(email)) } } Coroutines Observable Returns true/false, yeets exception
167. class UserViewModel { val stateObservable = BroadcastChannel<State>(1) fun updateState(email: String) { stateObservable.offer(State(email)) } } Coroutines Observable
168. class UserViewModel, CoroutineScope by DefaultScope() { val stateObservable = BroadcastChannel<State>(1) fun updateState(email: String) { stateObservable.offer(State(email)) } } Coroutines Observable
169. class UserViewModel, CoroutineScope by DefaultScope() { val stateObservable = BroadcastChannel<State>(1) fun updateState(email: String) { launch { stateObservable.send(State(email)) } } } Coroutines Observable
170. class UserViewModel, CoroutineScope by DefaultScope() { val stateObservable = BroadcastChannel<State>(1) fun updateState(email: String) { stateObservable.offer(State(email)) } } Coroutines Observable
171. class UserViewModel, CoroutineScope by DefaultScope() { private val _stateObservable = BroadcastChannel<State>(1) val stateObservable get()= _stateObservable.asFlow() fun updateState(email: String) { _stateObservable.offer(State(email)) } } Coroutines Observable
172. class UserViewModel, CoroutineScope by DefaultScope() { private val _stateObservable = BroadcastChannel<State>(1) val stateObservable get()= _stateObservable.asFlow() fun updateState(email: String) { _stateObservable.offer(State(email)) } } Coroutines Observable Channels inside, Flows outside
173. class UserViewModel, CoroutineScope by DefaultScope() { private val _stateObservable = BroadcastChannel<State>(1) val stateObservable get()= _stateObservable.asFlow() fun updateState(email: String) { _stateObservable.offer(State(email)) } } Coroutines Observable
174. class UserViewModel, CoroutineScope by DefaultScope() { private val _stateObservable = BroadcastChannel<State>(1) val stateObservable get()= _stateObservable.asFlow() fun updateState(email: String) { _stateObservable.offer(State(email)) } } Coroutines Observable
175. Channel/Flow Activity/ Fragment (onCreate) API Service Repository (Database) Flowable ViewModel oldEmail@ address.com State
176. Channel/Flow Activity/ Fragment (onCreate) API Service Repository (Database) Flowable ViewModel update Email oldEmail@ address.com State SERVER
177. Channel/Flow Activity/ Fragment (onCreate) API Service Repository (Database) Flowable ViewModel oldEmail@ address.com State newEmail@ address.com
178. Channel/Flow Activity/ Fragment (onCreate) API Service Repository (Database) Flowable ViewModel oldEmail@ address.com State newEmail@ address.com
179. Channel/Flow Activity/ Fragment (onDestroy) API Service Repository (Database) Flowable ViewModel State newEmail@ address.com
180. Channel/Flow Activity/ Fragment (onDestroy) API Service Repository (Database) Flowable ViewModel State newEmail@ address.com
181. Channel/Flow Activity/ Fragment (onDestroy) API Service Repository (Database) ViewModel State newEmail@ address.com
182. Channel/Flow Activity/ Fragment (onDestroy) API Service Repository (Database) newEmail@ address.com
183. Channel/Flow API Service Repository (Database) newEmail@ address.com
184. Comparisons LiveData Easy to Read Yes Lifecycle/Cleanup Fully Auto Nullable Always Scope UI Only Saves Last Value Yes Threading UI Only Stable / Reliable Yes Guides / Docs Good Multiplatform No
185. Comparisons LiveData RxJava Easy to Read Yes No Lifecycle/Cleanup Fully Auto Fully Manual Nullable Always Configurable Scope UI Only Anywhere Saves Last Value Yes Configurable Threading UI Only Mostly Easy Stable / Reliable Yes Yes Guides / Docs Good Meh Multiplatform No Sorta
186. Comparisons LiveData RxJava Coroutines Easy to Read Yes No Mostly Lifecycle/Cleanup Fully Auto Fully Manual Semi-Auto Nullable Always Configurable IDE-enforced Scope UI Only Anywhere Anywhere Saves Last Value Yes Configurable Configurable Threading UI Only Mostly Easy Easy Stable / Reliable Yes Yes Sorta Guides / Docs Good Meh Quality, but few Multiplatform No Sorta Mostly
187. Comparisons LiveData RxJava Coroutines Easy to Read Lifecycle/Cleanup Nullable Scope Saves Last Value Threading Stable / Reliable Guides / Docs Multiplatform ⏳ ⏳
188. Comparisons LiveData RxJava Coroutines Who should use it? Beginners++ Intermediate++ Everyone* Final Rating Team Setup? Small / New Large Production App Supportive team Any setup* All Future Kotlin Apps ⏳ *Willing to accept risk of cutting edge
189. Questions
190. Testing LiveData RxJava Coroutines Ease of basic testing Easy Almost easy Easy Ease of complex testing ? Doable Doable Readability of Tests Easy Almost Easy Easy