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
WebView😇😇😇
Search
Keishin Yokomaku
November 28, 2017
Technology
0
890
WebView😇😇😇
Keishin Yokomaku
November 28, 2017
Tweet
Share
More Decks by Keishin Yokomaku
See All by Keishin Yokomaku
One screen, many BottomSheets
keithyokoma
0
380
LazyColumnのitemがViewPortの中で占める領域の割合を知りたい
keithyokoma
0
640
Build apps for Cars
keithyokoma
0
510
Save the state
keithyokoma
0
560
Either in Kotlin
keithyokoma
0
570
持続的なアプリ開発のためのDXを支える技術
keithyokoma
2
5.2k
Make the objects serializable with kotlinx.serialization
keithyokoma
0
5.1k
Kotlin で書く Gradle Custom Tasks
keithyokoma
0
540
DX Improvements
keithyokoma
3
400
Other Decks in Technology
See All in Technology
[TechNight #90-1] 本当に使える?ZDMの新機能を実践検証してみた
oracle4engineer
PRO
3
140
ObsidianをMCP連携させてみる
ttnyt8701
2
140
In Praise of "Normal" Engineers (LDX3)
charity
3
1.2k
Observability infrastructure behind the trillion-messages scale Kafka platform
lycorptech_jp
PRO
0
130
AWS Summit Japan 2025 Community Stage - App workflow automation by AWS Step Functions
matsuihidetoshi
1
140
25分で解説する「最小権限の原則」を実現するための AWS「ポリシー」大全 / 20250625-aws-summit-aws-policy
opelab
6
710
Snowflake Summit 2025 データエンジニアリング関連新機能紹介 / Snowflake Summit 2025 What's New about Data Engineering
tiltmax3
0
230
20250625 Snowflake Summit 2025活用事例 レポート / Nowcast Snowflake Summit 2025 Case Study Report
kkuv
1
200
CI/CDとタスク共有で加速するVibe Coding
tnbe21
0
230
VISITS_AIIoTビジネス共創ラボ登壇資料.pdf
iotcomjpadmin
0
150
Snowflake Summit 2025全体振り返り / Snowflake Summit 2025 Overall Review
mtpooh
2
200
AI技術トレンド勉強会 #1MCPの基礎と実務での応用
nisei_k
1
240
Featured
See All Featured
Templates, Plugins, & Blocks: Oh My! Creating the theme that thinks of everything
marktimemedia
31
2.4k
A designer walks into a library…
pauljervisheath
206
24k
ReactJS: Keep Simple. Everything can be a component!
pedronauck
667
120k
Fantastic passwords and where to find them - at NoRuKo
philnash
51
3.3k
[Rails World 2023 - Day 1 Closing Keynote] - The Magic of Rails
eileencodes
35
2.3k
The Pragmatic Product Professional
lauravandoore
35
6.7k
How STYLIGHT went responsive
nonsquared
100
5.6k
How to Ace a Technical Interview
jacobian
277
23k
XXLCSS - How to scale CSS and keep your sanity
sugarenia
248
1.3M
Unsuck your backbone
ammeep
671
58k
Practical Tips for Bootstrapping Information Extraction Pipelines
honnibal
PRO
20
1.3k
I Don’t Have Time: Getting Over the Fear to Launch Your Podcast
jcasabona
32
2.3k
Transcript
WebView Keishin Yokomaku (@KeithYokoma) / potatotips #45
WebView Keishin Yokomaku 2 potatotips #45 Drivemode, Inc. / Principal
Engineer @KeithYokoma: GitHub / Twitter / Qiita / Tumblr / Stack Overflow
3 WebView
WebView Կ͔ͱ᠘ͷଟ͍ WebView ▸ Θ͔Δ ▸ ੲSIGSEGVβϥͩͬͨཕݪͷΑ͏ͳͷ 4 potatotips #45
WebView ChromeCustomTabs ͕͋Δ͔Β WebView ͍Βͳ͍ࢠ ▸ ͦΜͳ;͏ʹߟ͍͑ͯͨ࣌ظ͕Θͨ͠ʹ͋Γ·ͨ͠ 5 potatotips #45
WebView ·ͩ WebView Ͱফ͍ͯ͠Δͷʁ ▸ Θ͍ͨͯ͠͠·͢ 6 potatotips #45
WebView ࠓͷ WebView ᠘Ϩγϐ ▸ e.g. ๏తใΛ WebView Ͱදࣔ͢Δ ▸
assets ʹ html Λஔ͍ͯ WebView ʹಡ·ͤΔ ▸ ֎෦ϦϯΫ͕ͳ͚Ε࠷खܰʹࡁ·ͤΒΕΔ ▸ ಉ͡ assets ͷ html ʹϦϯΫ͢Δ߹؆୯ ▸ e.g. file:///android_asset/privacy_policy.html 7 potatotips #45
WebView StrictMode ▸ ThreadPolicy ͱ VmPolicy ▸ ͋Γ͕ͪͳ࣮ͷؒҧ͍Λݕग़ͯ͠ϩάग़ྗΫϥογϡΛൃੜͤ͞Δ ▸ ϝΠϯεϨουͰ
I/O ▸ Ϧιʔεͷ close Ε ▸ ΧελϜ͢Δͱ͖ඞཁͳͷͯ͢Λ༗ޮʹ͢Δ ▸ ༗ޮʹͯ͠ͳ͍ͷεϧʔ͞ΕΔ 8 potatotips #45
WebView Android Nougat ͷηΩϡϦςΟ༷ ▸ FileUriExposureException ▸ File εΩʔϚͷ Uri
Λ Intent ʹ͍Εͯڞ༗Ͱ͖ͳ͘ͳͬͨ ▸ FileProvider ͷ ContentProvider Ͱڞ༗͢Δ ▸ StrictMode ʹΦϓγϣϯ͕͋Δ ▸ VmPolicy#penaltyDeathOnFileUriExposure() 9 potatotips #45
WebView WebView#loadUrl() ͷ༷ ▸ WebViewClient Λࢦఆͨ͠ͱ͖ ▸ shouldOverrideUrlLoading ͕ true:
ΞϓϦͰಡΈࠐΈΛཧ ▸ shouldOverrideUrlLoading ͕ false: WebView ͕ಡΈࠐΈΛཧ ▸ WebViewClient Λࢦఆ͠ͳ͍ͱ͖ ▸ ActivityManager ʹ͍߹ΘͤͯదͳͷΛݺͼग़͢ 10 potatotips #45
WebView WebView#loadUrl() ͷ༷ ▸ WebViewClient Λࢦఆͨ͠ͱ͖ ▸ shouldOverrideUrlLoading ͕ true:
ΞϓϦͰಡΈࠐΈΛཧ ▸ shouldOverrideUrlLoading ͕ false: WebView ͕ಡΈࠐΈΛཧ ▸ WebViewClient Λࢦఆ͠ͳ͍ͱ͖ ▸ ActivityManager ʹ͍߹ΘͤͯదͳͷΛݺͼग़͢ 11 potatotips #45
WebView ActivityManager ʹ͍߹ΘͤͯదͳͷΛݺͼग़͢ ▸ Intent Λ͛ͯϋϯυϧͯ͘͠ΕΔΞϓϦΛ୳͢ ▸ ଘࡏ͢ΕͦͪΒʹ͢ ▸ ଘࡏ͠ͳ͚Ε
WebView ͕ϋϯυϧ͢Δ ▸ ͍ͣΕʹͯ͠ Intent ʹಡΈࠐΉ Uri ͕٧Ίࠐ·ΕΔ 12 potatotips #45
WebView ActivityManager ʹ͍߹ΘͤͯదͳͷΛݺͼग़͢ ▸ Intent Λ͛ͯϋϯυϧͯ͘͠ΕΔΞϓϦΛ୳͢ ▸ ଘࡏ͢ΕͦͪΒʹ͢ ▸ ଘࡏ͠ͳ͚Ε
WebView ͕ϋϯυϧ͢Δ ▸ ͍ͣΕʹͯ͠ Intent ʹಡΈࠐΉ Uri ͕٧Ίࠐ·ΕΔ ▸ file:///android_asset/hogehoge.html ͳϦϯΫΛ౿Ήͱ… 13 potatotips #45
14 potatotips #45
WebView WebView Λ͏ͱ͖ͷڭ܇ ▸ WebViewClient Λ͖ͪΜͱ͍·͠ΐ͏ ▸ ֎෦ϦϯΫ JavaScript ͕ͳ͍͔ΒͱݴͬͯԿ͠ͳͯ͘Α͍Θ͚Ͱͳ͍
15 potatotips #45
WebView Keishin Yokomaku (@KeithYokoma) / DroidKaigi 2017
Drivemode We are hiring! 17 potatotips #45
Drivemode We are hiring! 18 potatotips #45
DroidKaigi DroidKaigi 2018 is coming soon! ▸ Ticket: ▸ Early
Bird: 9,800 JPY ▸ Regular: 12,000 JPY ▸ Students: 4,000 JPY 19 potatotips #45