WebView😇😇😇 - Speaker Deck

WebView😇😇😇

by Keishin Yokomaku

Slide 1

Slide 1 text

WebView Keishin Yokomaku (@KeithYokoma) / potatotips #45

Slide 2

Slide 2 text

WebView Keishin Yokomaku 2 potatotips #45 Drivemode, Inc. / Principal Engineer @KeithYokoma: GitHub / Twitter / Qiita / Tumblr / Stack Overﬂow

Slide 3

Slide 3 text

3 WebView

Slide 4

Slide 4 text

WebView Կ͔ͱ᠘ͷଟ͍ WebView ▸ Θ͔Δ ▸ ੲ͸SIGSEGV΋βϥͩͬͨ஍ཕݪͷΑ͏ͳ΋ͷ 4 potatotips #45

Slide 5

Slide 5 text

WebView ChromeCustomTabs ͕͋Δ͔Β WebView ͸͍Βͳ͍ࢠ ▸ ͦΜͳ;͏ʹߟ͍͑ͯͨ࣌ظ͕Θͨ͠ʹ΋͋Γ·ͨ͠ 5 potatotips #45

Slide 6

Slide 6 text

WebView ·ͩ WebView Ͱফ໣͍ͯ͠Δͷʁ ▸ Θͨ͠͸͍ͯ͠·͢ 6 potatotips #45

Slide 7

Slide 7 text

WebView ࠓ೔ͷ WebView ᠘Ϩγϐ ▸ e.g. ๏త৘ใΛ 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

Slide 8

Slide 8 text

WebView StrictMode ▸ ThreadPolicy ͱ VmPolicy ▸ ͋Γ͕ͪͳ࣮૷ͷؒҧ͍Λݕग़ͯ͠ϩάग़ྗ΍ΫϥογϡΛൃੜͤ͞Δ ▸ ϝΠϯεϨουͰ I/O ▸ Ϧιʔεͷ close ๨Ε ▸ ΧελϜ͢Δͱ͖͸ඞཁͳ΋ͷ͢΂ͯΛ༗ޮʹ͢Δ ▸ ༗ޮʹͯ͠ͳ͍΋ͷ͸εϧʔ͞ΕΔ 8 potatotips #45

Slide 9

Slide 9 text

WebView Android Nougat ͷηΩϡϦςΟ࢓༷ ▸ FileUriExposureException ▸ File εΩʔϚͷ Uri Λ Intent ʹ͍Εͯڞ༗Ͱ͖ͳ͘ͳͬͨ ▸ FileProvider ౳ͷ ContentProvider Ͱڞ༗͢Δ ▸ StrictMode ʹ΋Φϓγϣϯ͕͋Δ ▸ VmPolicy#penaltyDeathOnFileUriExposure() 9 potatotips #45

Slide 10

Slide 10 text

WebView WebView#loadUrl() ͷ࢓༷ ▸ WebViewClient Λࢦఆͨ͠ͱ͖ ▸ shouldOverrideUrlLoading ͕ true: ΞϓϦͰಡΈࠐΈΛ؅ཧ ▸ shouldOverrideUrlLoading ͕ false: WebView ͕ಡΈࠐΈΛ؅ཧ ▸ WebViewClient Λࢦఆ͠ͳ͍ͱ͖ ▸ ActivityManager ʹ໰͍߹Θͤͯద੾ͳ΋ͷΛݺͼग़͢ 10 potatotips #45

Slide 11

Slide 11 text

Slide 12

Slide 12 text

WebView ActivityManager ʹ໰͍߹Θͤͯద੾ͳ΋ͷΛݺͼग़͢ ▸ Intent Λ౤͛ͯϋϯυϧͯ͘͠ΕΔΞϓϦΛ୳͢ ▸ ଘࡏ͢Ε͹ͦͪΒʹ౉͢ ▸ ଘࡏ͠ͳ͚Ε͹ WebView ͕ϋϯυϧ͢Δ ▸ ͍ͣΕʹͯ͠΋ Intent ʹಡΈࠐΉ Uri ͕٧Ίࠐ·ΕΔ 12 potatotips #45

Slide 13

Slide 13 text

WebView ActivityManager ʹ໰͍߹Θͤͯద੾ͳ΋ͷΛݺͼग़͢ ▸ Intent Λ౤͛ͯϋϯυϧͯ͘͠ΕΔΞϓϦΛ୳͢ ▸ ଘࡏ͢Ε͹ͦͪΒʹ౉͢ ▸ ଘࡏ͠ͳ͚Ε͹ WebView ͕ϋϯυϧ͢Δ ▸ ͍ͣΕʹͯ͠΋ Intent ʹಡΈࠐΉ Uri ͕٧Ίࠐ·ΕΔ ▸ ﬁle:///android_asset/hogehoge.html ͳϦϯΫΛ౿Ήͱ… 13 potatotips #45

Slide 14

Slide 14 text

14 potatotips #45

Slide 15

Slide 15 text

WebView WebView Λ࢖͏ͱ͖ͷڭ܇ ▸ WebViewClient Λ͖ͪΜͱ࢖͍·͠ΐ͏ ▸ ֎෦ϦϯΫ΍ JavaScript ͕ͳ͍͔ΒͱݴͬͯԿ΋͠ͳͯ͘Α͍Θ͚Ͱ͸ͳ͍ 15 potatotips #45

Slide 16

Slide 16 text

WebView Keishin Yokomaku (@KeithYokoma) / DroidKaigi 2017

Slide 17

Slide 17 text

Drivemode We are hiring! 17 potatotips #45

Slide 18

Slide 18 text

Drivemode We are hiring! 18 potatotips #45

Slide 19

Slide 19 text

DroidKaigi DroidKaigi 2018 is coming soon! ▸ Ticket: ▸ Early Bird: 9,800 JPY ▸ Regular: 12,000 JPY ▸ Students: 4,000 JPY 19 potatotips #45