Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
AndroidXに潜む便利なヤツら
Search
Takuji Nishibayashi
April 19, 2019
Technology
0
190
AndroidXに潜む便利なヤツら
Takuji Nishibayashi
April 19, 2019
Tweet
Share
More Decks by Takuji Nishibayashi
See All by Takuji Nishibayashi
compose-hot-reload を試そうとした話
takuji31
0
93
CameraX使ってみた
takuji31
0
250
kotlinx.datetime 使ってみた
takuji31
0
810
HiltのCustom Componentについて
takuji31
0
300
java.timeをAndroidで使う
takuji31
0
150
KSPを使ってコード生成
takuji31
0
390
Kotlin Symbol Processing API (KSP) を使って Kotlin ア プリケーションの開発を効率化する
takuji31
1
2.9k
kotlinx.serialization
takuji31
0
630
kanmoba-returns-02.pdf
takuji31
0
240
Other Decks in Technology
See All in Technology
AIが書いたコードをAIが検証する!自律的なモバイルアプリ開発の実現
henteko
1
230
生成AIで「お客様の声」を ストーリーに変える 新潮流「Generative ETL」
ishikawa_satoru
1
220
Oracle Base Database Service 技術詳細
oracle4engineer
PRO
11
77k
API提供者のためのMCPサーバー設計ガイド / MCP Server Design Guide for API Providers
yokawasa
0
230
ZennとCloud Runの歩み - プロダクト開発に全集中できる相棒になるまで
wadayusuke
5
620
GC25 Recap+: Advancing Go Garbage Collection with Green Tea
logica0419
1
300
PLaMoの事後学習を支える技術 / PFN LLMセミナー
pfn
PRO
9
3k
フルカイテン株式会社 エンジニア向け採用資料
fullkaiten
0
9k
BtoBプロダクト開発の深層
16bitidol
0
130
kaigi_on_rails_2025_設計.pdf
nay3
8
4k
PyCon JP 2025 DAY1 「Hello, satellite data! ~Pythonではじめる衛星データ解析~」
ra0kley
0
730
データエンジニアがこの先生きのこるには...?
10xinc
0
400
Featured
See All Featured
How To Stay Up To Date on Web Technology
chriscoyier
791
250k
Navigating Team Friction
lara
189
15k
Templates, Plugins, & Blocks: Oh My! Creating the theme that thinks of everything
marktimemedia
31
2.5k
Improving Core Web Vitals using Speculation Rules API
sergeychernyshev
18
1.2k
GitHub's CSS Performance
jonrohan
1032
460k
Performance Is Good for Brains [We Love Speed 2024]
tammyeverts
12
1.1k
Designing Experiences People Love
moore
142
24k
Thoughts on Productivity
jonyablonski
70
4.8k
How to Think Like a Performance Engineer
csswizardry
27
2k
Large-scale JavaScript Application Architecture
addyosmani
513
110k
StorybookのUI Testing Handbookを読んだ
zakiyama
31
6.2k
Rails Girls Zürich Keynote
gr2m
95
14k
Transcript
AndroidXʹજΉศརͦ͏ͳϠπΒ @takuji31 Mobile Act KYOTO #1
ࣗݾհ
ࣗݾհ • @takuji31 id:takuji31 • Takuji Nishibayashi • Hatena Co.,
Ltd. • App Team • ίϛοΫDAYS • δϟϯϓϧʔΩʔʂ • ΧΫϤϜ
ࣗݾհ • Android • Kotlin • Flu-er • ! h-ps:/
/blog.takuji31.jp • " h-ps:/ /nazuna.takuji31.jp • # $ h-ps:/ /photo.takuji31.jp
AndroidX
LiveData? ViewModel? AppCompat? Naviga5on
ͬͯ·͢ΑͶ
ศརͳͭ৭ʑհ͠·͢
α൛ͷͷؚ·ΕΔͷͰ ͝ར༻ܭըతʹ
ଞʹ͍͍ͷ͋ͬͨΒ ڭ͍͑ͯͩ͘͞ʂ
androidx.ac*vity androidx.fragment
ComponentActivity.viewModels{} Fragment.viewModels{} Fragment.activityViewModels{}
ViewModelΛऔಘͰ͖Δ Delegated property
viewModels ҾͰ ViewModelStoreOwnerΛ୳͢ blockΛͤΔ
valʹͰ͖Δ
Goodbye! private lateinit var
@ContentView
ComponentAc*vity ͱ Fragmentʹ secondory constructor͕Ճ
constructorͷҾʹLayoutͷIDΛ ͤΔ
Goodbye setContentView()
DataBindingbind͢ΕΑͦ͞͏
androidx.lifecycle
ViewModelͱ͔LiveDataͱ͔ೖͬͯ ΔΞϨ
ViewModel.viewModelScope
ViewModelͷCorou,neScope
Context Dispatchers.Main + Job
onCleared() ͰΩϟϯηϧ
Saved State
ViewModelը໘ճసΛੜ͖Δ
Ac#vity͕ϝϞϦʔ͔Β ഁغ͞ΕΔ࣌ࢮ͵
SavedStateHandler Ͱঢ়ଶΛ෮ݩͰ͖Δ
γϯϓϧͳ set/get/remove/contains
getLiveData()
see. h&ps:/ /developer.android.com/ topic/libraries/architecture/ viewmodel-savedstate
androidx.navigation
Naviga&onͷΞϨ
androidx.navigation.safeargs androidx.navigation.safeargs.kotlin
Naviga&onͷxmlʹఆٛͨ͠ભҠઌ ͷargsΛࣗಈੜ
KotlinίʔυੜՄೳ
Goodbye createIntent() methods!
Naviga&onͰը໘ભҠ͠ͳͯ͘ ͑Δ
·ͣͬͯΈͯʂ
Fragment.navGraphViewModels()
ࢦఆͨ͠Naviga&onͷgraphͰੜ͖ ΔFragment
NavHostFragmentͷFragment Ͱ͏ɺΈ͍ͨͳײ͡ͷ࣌ʹ͑ͦ ͏
͜Εॻ͍ͯͯࠓ࣮ͯ͠Δը໘Ͱ ͑ͦ͏ͱࢥͬͨͷͰ͏༧ఆ
h"ps:/ /developer.android.com/ jetpack/androidx