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DroidKaigi 2020 Sato Shun GitHub: satoshun Twitter: @stsn_jp CyberAgent, Inc. System UIΛίϯτϩʔϧͯ͠ɺ ը໘Λ࠷େݶʹੜ͔ͨ͠ΞϓϦΛߏங͢Δ

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͜ͷൃදͷલఏ • API 21Ҏ߱Λ૝ఆ͍ͯ͠·͢ • ͜ͷൃදͰ͸ɺAPI 21͕API 1ʹͳΓ·͢

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• Edge to Edgeͱ͸? • Edge to EdgeΛͳͥ΍Δ͔? • Edge to EdgeΛͲͷΑ͏ʹ΍Δ͔ʁ • ΧελϜView͔ΒֶͿ • ଞͷΞϓϦ͔ΒֶͿ

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Edge to Edgeͱ͸?

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• ը໘શମΛίϯςϯπྖҬʹ • System UIͷഎޙʹίϯςϯπ Λඳը https://medium.com/androiddevelopers/gesture-navigation-going-edge-to-edge-812f62e4e83e

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Edge to EdgeΛͳͥ΍Δ͔?

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Edge to EdgeΛͳͥ΍Δ͔? • ը໘શମΛ࢖͏͜ͱͰɺΑΓ຅ೖײͷ͋ΔΞϓϦΛߏஙͰ͖ Δ • AndroidϓϥοτϑΥʔϜશମͷྲྀΕ • API 29(Q)Ҏ߱Ͱ͸ɺڧ͘નΊ͍ͯΔ

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Edge to EdgeΛͲͷΑ͏ʹ΍Δ͔

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Edge to EdgeΛͲͷΑ͏ʹ΍Δ͔ • SystemUiVisibility • System UIͷഎܠ৭ • fitsSystemWindows • WindowInsets

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SystemUiVisibility ͱ͸? • System UIʢstatus bar / navigation barʣͷݟͨ໨ɺৼΔ෣͍ Λมߋ͢Δ

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SystemUiVisibility ͱ͸? • System UIʢstatus bar / navigation barʣͷݟͨ໨ɺৼΔ෣͍ Λมߋ͢Δ • Immersive modeʢ຅ೖϞʔυʣ

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SystemUiVisibility ͱ͸? • System UIʢstatus bar / navigation barʣͷݟͨ໨ɺৼΔ෣͍ Λมߋ͢Δ • Immersive modeʢ຅ೖϞʔυʣ

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SystemUiVisibility ͱ͸? • System UIʢstatus bar / navigation barʣͷݟͨ໨ɺৼΔ෣͍ Λมߋ͢Δ • Immersive modeʢ຅ೖϞʔυʣ

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SystemUiVisibility ͱ͸? • System UIʢstatus bar / navigation barʣͷݟͨ໨ɺৼΔ෣͍ Λมߋ͢Δ • Immersive modeʢ຅ೖϞʔυʣ • status bar / navigation barͷഎޙʹඳը

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SystemUiVisibility ͱ͸? • System UIʢstatus bar / navigation barʣͷݟͨ໨ɺৼΔ෣͍ Λมߋ͢Δ • Immersive modeʢ຅ೖϞʔυʣ • status bar / navigation barͷഎޙʹඳը

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status bar navigation bar

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γεςϜ͕ViewΛ ૠೖ͢Δ

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paddingTopɺmarginBottom͕ ηοτ͞Ε͍ͯΔ

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paddingTopɺmarginBottom͕ ηοτ͞Ε͍ͯΔ

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paddingTopɺmarginBottom͕ ηοτ͞Ε͍ͯΔ -> ίϯςϯπΛඳը͢Δ͜ͱ͸ग़དྷͳ͍

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paddingTopɺmarginBottom͕ ηοτ͞Ε͍ͯΔ -> ίϯςϯπΛඳը͢Δ͜ͱ͸ग़དྷͳ͍ ͜ͷpaddingTopɺmarginBottomͷ஋Λ ্ॻ͖͢Δඞཁ͕͋Δ

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view.systemUiVisibility = View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN

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view.systemUiVisibility = View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN

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view.systemUiVisibility = View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN

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view.systemUiVisibility = View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN

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view.systemUiVisibility = View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN

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view.systemUiVisibility = View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN

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view.systemUiVisibility = View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN or View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION

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view.systemUiVisibility = View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN or View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION

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view.systemUiVisibility = View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN or View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION

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view.systemUiVisibility = View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN or View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION

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view.systemUiVisibility = View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN or View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION

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view.systemUiVisibility = View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN or View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION

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view.systemUiVisibility = View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN or View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION

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SystemUiVisibility·ͱΊ • SYSTEM_UI_FLAG_LAYOUT_FULLSCREENɺ SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION • 2ͭΛ૊Έ߹ΘͤΔ͜ͱͰɺmarginɺpaddingΛ0ʹઃఆ͢Δ͜ͱ ͕ग़དྷΔ • ίϯςϯπΛSystem UIͷഎޙʹඳը͢Δ͜ͱ͕ग़དྷΔ • SYSTEM_UI_FLAG_LAYOUT_STABLE΋෇͚ͨ΄͏͕ྑ͍ • ৄ͘͠͸ɺDroidKaigi2020 ৄղ WindowInsetsΛݟ͍ͯͩ͘͞

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System UIͷഎܠ৭

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window.statusBarColor = … #B3FFFFFF

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window.statusBarColor = … #B3FFFFFF

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view.systemUiVisibility = ... View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR true

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view.systemUiVisibility = ... View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR true

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API23+ view.systemUiVisibility = ... View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR true

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API23+ API23ະຬͰ͸ɺ Lightʢ໌Δ͍ʣ৭Λstatus barͷ എܠ৭ʹऔΔͱࢹೝੑ͕ஶ͘͠ ௿Լ͢Δ͜ͱΛҙຯ͢Δ view.systemUiVisibility = ... View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR true

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window.navigationBarColor = … #B3FFFFFF

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window.navigationBarColor = … #B3FFFFFF

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view.systemUiVisibility = ... View.SYSTEM_UI_FLAG_LIGHT_NAVIGATION_BAR true

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view.systemUiVisibility = ... View.SYSTEM_UI_FLAG_LIGHT_NAVIGATION_BAR true

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API27+ view.systemUiVisibility = ... View.SYSTEM_UI_FLAG_LIGHT_NAVIGATION_BAR true

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API27+ API27ະຬͰ͸ɺ Lightʢ໌Δ͍ʣ৭Λnavigationͷ എܠ৭ʹऔΔͱࢹೝੑ͕ஶ͘͠ ௿Լ͢Δ͜ͱΛҙຯ͢Δ view.systemUiVisibility = ... View.SYSTEM_UI_FLAG_LIGHT_NAVIGATION_BAR true

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transparent

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transparent

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API29+͔ΒtransparentΛ ࢦఆͨ͠৔߹ʹɺ ࣗಈతʹഎܠ৭Λઃఆͯ͘͠ΕΔ Α͏ʹͳͬͨ transparent

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API29+͔ΒtransparentΛ ࢦఆͨ͠৔߹ʹɺ ࣗಈతʹഎܠ৭Λઃఆͯ͘͠ΕΔ Α͏ʹͳͬͨ transparent false false

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transparent API29+͔ΒtransparentΛ ࢦఆͨ͠৔߹ʹɺ ࣗಈతʹഎܠ৭Λઃఆͯ͘͠ΕΔ Α͏ʹͳͬͨ false false

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System UIഎܠ৭ͷ·ͱΊ • API23+: windowLightStatusBarͷ௥Ճ • API27+: windowLightNavigationBarͷ௥Ճ • API29+: enforceNavigationBarContrastɺ enforceStatusBarContrastͷ௥Ճ • transparentͷͱ͖ɺ͍͍ײ͡ʹഎܠ৭Λௐ੔ͯ͘͠ΕΔ

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fitsSystemWindows

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fitsSystemWindowsͱ͸? • System UIΛߟྀͯ͠ɺΞϓϦέʔγϣϯίϯςϯπΛ഑ஔͯ͠ ͘ΕΔ • σϑΥϧτͷಈ࡞ͱɺΧελϚΠζͨ͠ಈ࡞͕͋Δ • ೉͍͠ଐੑͷ1ͭʢݸਓతͳײ૝ʣ

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view.systemUiVisibility = View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN or View.SYSTEM_UI_FLAG_LAYOUT_STABLE or View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION

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view.systemUiVisibility = View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN or View.SYSTEM_UI_FLAG_LAYOUT_STABLE or View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION

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view.systemUiVisibility = View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN or View.SYSTEM_UI_FLAG_LAYOUT_STABLE or View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION ্෦ɺԼ෦ͷmarginɺpadding͕θϩʹͳΔͷͰɺ ཁૉ͕ΊΓࠐΜͰ͠·͏

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fitsSystemWindows͸ɺ paddingTopɺpaddingBottomΛઃఆ͢Δ

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͜ͷfitsSystemWindows͸ແࢹ͞ΕΔ

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͜ͷfitsSystemWindows͸ແࢹ͞ΕΔ fitsSystemWindows͸σϑΥϧτͰɺ ਂ͞༏ઌ୳ࡧΛ͠ɺݟ͔ͭͬͨ࠷ॳͷΈ༗ޮ

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͜ͷfitsSystemWindows͸ແࢹ͞ΕΔ fitsSystemWindows͸σϑΥϧτͰɺ ਂ͞༏ઌ୳ࡧΛ͠ɺݟ͔ͭͬͨ࠷ॳͷΈ༗ޮ View View View View View

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͜ͷfitsSystemWindows͸ແࢹ͞ΕΔ fitsSystemWindows͸σϑΥϧτͰɺ ਂ͞༏ઌ୳ࡧΛ͠ɺݟ͔ͭͬͨ࠷ॳͷΈ༗ޮ View View View View View

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͜ͷfitsSystemWindows͸ແࢹ͞ΕΔ fitsSystemWindows͸σϑΥϧτͰɺ ਂ͞༏ઌ୳ࡧΛ͠ɺݟ͔ͭͬͨ࠷ॳͷΈ༗ޮ View View View View View

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͜ͷfitsSystemWindows͸ແࢹ͞ΕΔ fitsSystemWindows͸σϑΥϧτͰɺ ਂ͞༏ઌ୳ࡧΛ͠ɺݟ͔ͭͬͨ࠷ॳͷΈ༗ޮ View View View View View

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͜ͷfitsSystemWindows͸ແࢹ͞ΕΔ fitsSystemWindows͸σϑΥϧτͰɺ ਂ͞༏ઌ୳ࡧΛ͠ɺݟ͔ͭͬͨ࠷ॳͷΈ༗ޮ View View View View View

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͜ͷfitsSystemWindows͸ແࢹ͞ΕΔ fitsSystemWindows͸σϑΥϧτͰɺ ਂ͞༏ઌ୳ࡧΛ͠ɺݟ͔ͭͬͨ࠷ॳͷΈ༗ޮ View View View View View

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͜ͷfitsSystemWindows͸ແࢹ͞ΕΔ fitsSystemWindows͸σϑΥϧτͰɺ ਂ͞༏ઌ୳ࡧΛ͠ɺݟ͔ͭͬͨ࠷ॳͷΈ༗ޮ

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fitsSystemWindows͸σϑΥϧτͰɺ ਂ͞༏ઌ୳ࡧΛ͠ɺݟ͔ͭͬͨ࠷ॳͷΈ༗ޮ ͜ͷfitsSystemWindows͸ແࢹ͞ΕΔ

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fitsSystemWindows·ͱΊ • σϑΥϧτͷڍಈ • System UIʹඃΒͳ͍Α͏ʹɺpaddingTopɺpaddingBottomΛ ઃఆ͢Δ • ਂ͞༏ઌ୳ࡧͰݟ͔ͭͬͨɺ࠷ॳͷViewͷΈ༗ޮʹͳΔ ΋ͬͱॊೈʹ࢖͍͍ͨཁٻ

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WindowInsets

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WindowInsetsͱ͸? • System UIͷ෯ɺ઎ΊΔྖҬ • WindowInsetsΛ࢖͏͜ͱͰɺfitsSystemWindowsΛΑΓॊೈ ʹΧελϚΠζͯ͠࢖͏͜ͱ͕ग़དྷΔ

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view.setOnApplyWindowInsetsListener { v, insets -> insets }

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view.setOnApplyWindowInsetsListener { v, insets -> v.updatePadding( top = insets.systemWindowInsetTop, bottom = insets.systemWindowInsetBottom ) insets }

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view.setOnApplyWindowInsetsListener { v, insets -> v.updatePadding( top = insets.systemWindowInsetTop, bottom = insets.systemWindowInsetBottom ) insets }

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view.setOnApplyWindowInsetsListener { v, insets -> v.updatePadding( top = insets.systemWindowInsetTop, bottom = insets.systemWindowInsetBottom ) insets }

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view.setOnApplyWindowInsetsListener { v, insets -> v.updatePadding( top = insets.systemWindowInsetTop, bottom = insets.systemWindowInsetBottom ) insets } class WindowInsets { Insets getSystemWindowInsets() Insets getStableInsets() Insets getSystemGestureInsets() Insets getMandatorySystemGestureInsets() Insets getTappableElementInsets() DisplayCutout getDisplayCutout() }

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view.setOnApplyWindowInsetsListener { v, insets -> v.updatePadding( top = insets.systemWindowInsetTop, bottom = insets.systemWindowInsetBottom ) insets }

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view.setOnApplyWindowInsetsListener { v, insets -> v.updatePadding( top = insets.systemWindowInsetTop, bottom = insets.systemWindowInsetBottom ) insets } child.setOnApplyWindowInsetsListener { v, insets -> v.updatePadding( top = insets.systemWindowInsetTop, bottom = insets.systemWindowInsetBottom ) insets }

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view.setOnApplyWindowInsetsListener { v, insets -> v.updatePadding( top = insets.systemWindowInsetTop, bottom = insets.systemWindowInsetBottom ) insets } child.setOnApplyWindowInsetsListener { v, insets -> v.updatePadding( top = insets.systemWindowInsetTop, bottom = insets.systemWindowInsetBottom ) insets }

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view.setOnApplyWindowInsetsListener { v, insets -> v.updatePadding( top = insets.systemWindowInsetTop, bottom = insets.systemWindowInsetBottom ) insets.consumeSystemWindowInsets() } child.setOnApplyWindowInsetsListener { v, insets -> v.updatePadding( top = insets.systemWindowInsetTop, bottom = insets.systemWindowInsetBottom ) insets }

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view.setOnApplyWindowInsetsListener { v, insets -> v.updatePadding( top = insets.systemWindowInsetTop, bottom = insets.systemWindowInsetBottom ) insets.consumeSystemWindowInsets() } child.setOnApplyWindowInsetsListener { v, insets -> v.updatePadding( top = insets.systemWindowInsetTop, bottom = insets.systemWindowInsetBottom ) insets }

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view.setOnApplyWindowInsetsListener { v, insets -> v.updatePadding( top = insets.systemWindowInsetTop, bottom = insets.systemWindowInsetBottom ) insets.consumeSystemWindowInsets() } child.setOnApplyWindowInsetsListener { v, insets -> v.updatePadding( top = insets.systemWindowInsetTop, bottom = insets.systemWindowInsetBottom ) insets }

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public WindowInsets dispatchApplyWindowInsets(WindowInsets insets) { try { mPrivateFlags3 |= PFLAG3_APPLYING_INSETS; if (mListenerInfo != null && mListenerInfo.mOnApplyWindowInsetsListener != null) { return mListenerInfo.mOnApplyWindowInsetsListener.onApplyWindowInsets(this, insets); } else { return onApplyWindowInsets(insets); } } finally { mPrivateFlags3 &= ~PFLAG3_APPLYING_INSETS; } }

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public WindowInsets dispatchApplyWindowInsets(WindowInsets insets) { try { mPrivateFlags3 |= PFLAG3_APPLYING_INSETS; if (mListenerInfo != null && mListenerInfo.mOnApplyWindowInsetsListener != null) { return mListenerInfo.mOnApplyWindowInsetsListener.onApplyWindowInsets(this, insets); } else { return onApplyWindowInsets(insets); } } finally { mPrivateFlags3 &= ~PFLAG3_APPLYING_INSETS; } }

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public WindowInsets onApplyWindowInsets(WindowInsets insets) { if ((mPrivateFlags3 & PFLAG3_FITTING_SYSTEM_WINDOWS) == 0) { if (fitSystemWindows(insets.getSystemWindowInsetsAsRect())) { return insets.consumeSystemWindowInsets(); } } else { if (fitSystemWindowsInt(insets.getSystemWindowInsetsAsRect())) { return insets.consumeSystemWindowInsets(); } } return insets; }

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public WindowInsets onApplyWindowInsets(WindowInsets insets) { if ((mPrivateFlags3 & PFLAG3_FITTING_SYSTEM_WINDOWS) == 0) { if (fitSystemWindows(insets.getSystemWindowInsetsAsRect())) { return insets.consumeSystemWindowInsets(); } } else { if (fitSystemWindowsInt(insets.getSystemWindowInsetsAsRect())) { return insets.consumeSystemWindowInsets(); } } return insets; } σϑΥϧτͷfitsSystemWindowsͷ৔߹ɺInsetsΛফඅ͢Δ

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public WindowInsets dispatchApplyWindowInsets(WindowInsets insets) { try { mPrivateFlags3 |= PFLAG3_APPLYING_INSETS; if (mListenerInfo != null && mListenerInfo.mOnApplyWindowInsetsListener != null) { return mListenerInfo.mOnApplyWindowInsetsListener.onApplyWindowInsets(this, insets); } else { return onApplyWindowInsets(insets); } } finally { mPrivateFlags3 &= ~PFLAG3_APPLYING_INSETS; } }

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public WindowInsets dispatchApplyWindowInsets(WindowInsets insets) { try { mPrivateFlags3 |= PFLAG3_APPLYING_INSETS; if (mListenerInfo != null && mListenerInfo.mOnApplyWindowInsetsListener != null) { return mListenerInfo.mOnApplyWindowInsetsListener.onApplyWindowInsets(this, insets); } else { return onApplyWindowInsets(insets); } finally { mPrivateFlags3 &= ~PFLAG3_APPLYING_INSETS; } }

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public void setOnApplyWindowInsetsListener(OnApplyWindowInsetsListener listener) { getListenerInfo().mOnApplyWindowInsetsListener = listener; } Listener͕ొ࿥͞Ε͍ͯΔͱɺ fitsSystemWindowsͷಈ࡞ΛΧελϚΠζ͢Δ ͜ͱ͕ग़དྷΔ view.setOnApplyWindowInsetsListener { v, insets -> … }

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WindowInsets·ͱΊ • System UIͷ෯ɺྖҬΛऔಘͰ͖Δ • ফඅͨ͠৔߹ɺͦΕҎ߱ʹWindowInsets͕఻ൖ͠ͳ͍ • σϑΥϧτͷfitsSystemWindowsͷ৔߹ɺඞͣফඅ͢Δ • setOnApplyWindowListener͔ΒɺfitsSystemWindowsͷσ ϑΥϧτͷڍಈΛม͑Δ͜ͱ͕Մೳ

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ΧελϜView͔ΒֶͿ

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setOnApplyWindowListenerΛ࢖ͬͯɺ σϑΥϧτͷڍಈΛม͍͑ͯΔ ·ͨɺWindowInsets͸ফඅ͍ͯ͠ͳ͍

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private void setupForInsets() { if (ViewCompat.getFitsSystemWindows(this)) { if (mApplyWindowInsetsListener == null) { mApplyWindowInsetsListener = new androidx.core.view.OnApplyWindowInsetsListener() { @Override public WindowInsetsCompat onApplyWindowInsets(View v, WindowInsetsCompat insets) { return setWindowInsets(insets); } }; } // First apply the insets listener ViewCompat.setOnApplyWindowInsetsListener(this, mApplyWindowInsetsListener);

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private void setupForInsets() { if (ViewCompat.getFitsSystemWindows(this)) { if (mApplyWindowInsetsListener == null) { mApplyWindowInsetsListener = new androidx.core.view.OnApplyWindowInsetsListener() { @Override public WindowInsetsCompat onApplyWindowInsets(View v, WindowInsetsCompat insets) { return setWindowInsets(insets); } }; } // First apply the insets listener ViewCompat.setOnApplyWindowInsetsListener(this, mApplyWindowInsetsListener);

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private void setupForInsets() { if (ViewCompat.getFitsSystemWindows(this)) { if (mApplyWindowInsetsListener == null) { mApplyWindowInsetsListener = new androidx.core.view.OnApplyWindowInsetsListener() { @Override public WindowInsetsCompat onApplyWindowInsets(View v, WindowInsetsCompat insets) { return setWindowInsets(insets); } }; } // First apply the insets listener ViewCompat.setOnApplyWindowInsetsListener(this, mApplyWindowInsetsListener);

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private void setupForInsets() { if (ViewCompat.getFitsSystemWindows(this)) { if (mApplyWindowInsetsListener == null) { mApplyWindowInsetsListener = new androidx.core.view.OnApplyWindowInsetsListener() { @Override public WindowInsetsCompat onApplyWindowInsets(View v, WindowInsetsCompat insets) { return setWindowInsets(insets); } }; } // First apply the insets listener ViewCompat.setOnApplyWindowInsetsListener(this, mApplyWindowInsetsListener);

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final WindowInsetsCompat setWindowInsets(WindowInsetsCompat insets) { if (!ObjectsCompat.equals(mLastInsets, insets)) { mLastInsets = insets; // Now dispatch to the Behaviors insets = dispatchApplyWindowInsetsToBehaviors(insets); requestLayout(); } return insets; }

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final WindowInsetsCompat setWindowInsets(WindowInsetsCompat insets) { if (!ObjectsCompat.equals(mLastInsets, insets)) { mLastInsets = insets; // Now dispatch to the Behaviors insets = dispatchApplyWindowInsetsToBehaviors(insets); requestLayout(); } return insets; }

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if (mLastInsets != null && ViewCompat.getFitsSystemWindows(this) && !ViewCompat.getFitsSystemWindows(child)) { parent.left += mLastInsets.getSystemWindowInsetLeft(); parent.top += mLastInsets.getSystemWindowInsetTop(); parent.right -= mLastInsets.getSystemWindowInsetRight(); parent.bottom -= mLastInsets.getSystemWindowInsetBottom(); } final Rect out = acquireTempRect(); GravityCompat.apply(resolveGravity(lp.gravity), child.getMeasuredWidth(), child.getMeasuredHeight(), parent, out, layoutDirection); child.layout(out.left, out.top, out.right, out.bottom); private void layoutChild(…)

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if (mLastInsets != null && ViewCompat.getFitsSystemWindows(this) && !ViewCompat.getFitsSystemWindows(child)) { parent.left += mLastInsets.getSystemWindowInsetLeft(); parent.top += mLastInsets.getSystemWindowInsetTop(); parent.right -= mLastInsets.getSystemWindowInsetRight(); parent.bottom -= mLastInsets.getSystemWindowInsetBottom(); } final Rect out = acquireTempRect(); GravityCompat.apply(resolveGravity(lp.gravity), child.getMeasuredWidth(), child.getMeasuredHeight(), parent, out, layoutDirection); child.layout(out.left, out.top, out.right, out.bottom); private void layoutChild(…)

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if (mLastInsets != null && ViewCompat.getFitsSystemWindows(this) && !ViewCompat.getFitsSystemWindows(child)) { parent.left += mLastInsets.getSystemWindowInsetLeft(); parent.top += mLastInsets.getSystemWindowInsetTop(); parent.right -= mLastInsets.getSystemWindowInsetRight(); parent.bottom -= mLastInsets.getSystemWindowInsetBottom(); } final Rect out = acquireTempRect(); GravityCompat.apply(resolveGravity(lp.gravity), child.getMeasuredWidth(), child.getMeasuredHeight(), parent, out, layoutDirection); child.layout(out.left, out.top, out.right, out.bottom);

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if (mLastInsets != null && ViewCompat.getFitsSystemWindows(this) && !ViewCompat.getFitsSystemWindows(child)) { parent.left += mLastInsets.getSystemWindowInsetLeft(); parent.top += mLastInsets.getSystemWindowInsetTop(); parent.right -= mLastInsets.getSystemWindowInsetRight(); parent.bottom -= mLastInsets.getSystemWindowInsetBottom(); } final Rect out = acquireTempRect(); GravityCompat.apply(resolveGravity(lp.gravity), child.getMeasuredWidth(), child.getMeasuredHeight(), parent, out, layoutDirection); child.layout(out.left, out.top, out.right, out.bottom);

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ViewCompat.setOnApplyWindowInsetsListener( this, new androidx.core.view.OnApplyWindowInsetsListener() { @Override public WindowInsetsCompat onApplyWindowInsets(View v, WindowInsetsCompat insets) { return onWindowInsetChanged(insets); } }); class AppBarLayout

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ViewCompat.setOnApplyWindowInsetsListener( this, new androidx.core.view.OnApplyWindowInsetsListener() { @Override public WindowInsetsCompat onApplyWindowInsets(View v, WindowInsetsCompat insets) { return onWindowInsetChanged(insets); } });

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WindowInsetsCompat onWindowInsetChanged(final WindowInsetsCompat insets) { WindowInsetsCompat newInsets = null; if (ViewCompat.getFitsSystemWindows(this)) { newInsets = insets; } … }

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WindowInsetsCompat onWindowInsetChanged(final WindowInsetsCompat insets) { WindowInsetsCompat newInsets = null; if (ViewCompat.getFitsSystemWindows(this)) { newInsets = insets; } … }

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protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { super.onMeasure(widthMeasureSpec, heightMeasureSpec); final int heightMode = MeasureSpec.getMode(heightMeasureSpec); if (heightMode != MeasureSpec.EXACTLY && ViewCompat.getFitsSystemWindows(this) && shouldOffsetFirstChild()) { int newHeight = getMeasuredHeight(); switch (heightMode) { case MeasureSpec.AT_MOST: newHeight = MathUtils.clamp( getMeasuredHeight() + getTopInset(), 0, MeasureSpec.getSize(heightMeasureSpec)); break; …

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protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { super.onMeasure(widthMeasureSpec, heightMeasureSpec); final int heightMode = MeasureSpec.getMode(heightMeasureSpec); if (heightMode != MeasureSpec.EXACTLY && ViewCompat.getFitsSystemWindows(this) && shouldOffsetFirstChild()) { int newHeight = getMeasuredHeight(); switch (heightMode) { case MeasureSpec.AT_MOST: newHeight = MathUtils.clamp( getMeasuredHeight() + getTopInset(), 0, MeasureSpec.getSize(heightMeasureSpec)); break; …

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protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { super.onMeasure(widthMeasureSpec, heightMeasureSpec); final int heightMode = MeasureSpec.getMode(heightMeasureSpec); if (heightMode != MeasureSpec.EXACTLY && ViewCompat.getFitsSystemWindows(this) && shouldOffsetFirstChild()) { int newHeight = getMeasuredHeight(); switch (heightMode) { case MeasureSpec.AT_MOST: newHeight = MathUtils.clamp( getMeasuredHeight() + getTopInset(), 0, MeasureSpec.getSize(heightMeasureSpec)); break; …

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protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { super.onMeasure(widthMeasureSpec, heightMeasureSpec); final int heightMode = MeasureSpec.getMode(heightMeasureSpec); if (heightMode != MeasureSpec.EXACTLY && ViewCompat.getFitsSystemWindows(this) && shouldOffsetFirstChild()) { int newHeight = getMeasuredHeight(); switch (heightMode) { case MeasureSpec.AT_MOST: newHeight = MathUtils.clamp( getMeasuredHeight() + getTopInset(), 0, MeasureSpec.getSize(heightMeasureSpec)); break; …

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protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { super.onMeasure(widthMeasureSpec, heightMeasureSpec); final int heightMode = MeasureSpec.getMode(heightMeasureSpec); if (heightMode != MeasureSpec.EXACTLY && ViewCompat.getFitsSystemWindows(this) && shouldOffsetFirstChild()) { int newHeight = getMeasuredHeight(); switch (heightMode) { case MeasureSpec.AT_MOST: newHeight = MathUtils.clamp( getMeasuredHeight() + getTopInset(), 0, MeasureSpec.getSize(heightMeasureSpec)); break; …

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protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { super.onMeasure(widthMeasureSpec, heightMeasureSpec); final int heightMode = MeasureSpec.getMode(heightMeasureSpec); if (heightMode != MeasureSpec.EXACTLY && ViewCompat.getFitsSystemWindows(this) && shouldOffsetFirstChild()) { int newHeight = getMeasuredHeight(); switch (heightMode) { case MeasureSpec.AT_MOST: newHeight = MathUtils.clamp( getMeasuredHeight() + getTopInset(), 0, MeasureSpec.getSize(heightMeasureSpec)); break; … ΋ͱ΋ͱͷAppbarLayoutߴ͞ + status bar ͷߴ͞

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ΧελϜView·ͱΊ • CoordinatorLayoutɺAppbarLayoutɺBottomAppbar͸ɺͦΕ ͧΕWindowInsetΛಠࣗͰղऍ͢Δ • ଞʹ΋ɺCollapsingToolbarLayoutɺDrawerLayoutͱ͔΋ͦ͏ • ͜ΕΒͷView͸ɺfitsSystemWindowsΛtrueʹࢦఆ͢Δͱɺ ͍͍ײ͡ʹInsetΛղऍͯ͘͠ΕΔ • fitsSystemWindowsࢦఆͯ͠΋ɺফඅ͠ͳ͔ͬͨΓ͢Δ

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ଞͷΞϓϦ͔ΒֶͿ

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ςʔϚΛߏங͢Δ

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APIϨϕϧΛߟྀ͢Δඞཁ͕͋Δ • API23+ • windowLightStatusBar • API27+ • windowLightNavigationBar • API29+ • enforceStatusBarContrast • enforceNavigationBarContrast

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APIϨϕϧΛߟྀ͢Δඞཁ͕͋Δ • API23+ • windowLightStatusBar • API27+ • windowLightNavigationBar • API29+ • enforceStatusBarContrast • enforceNavigationBarContrast 21 22 23 24 25 26 27 28 29

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Dev Summit 2019ΞϓϦ https://github.com/google/iosched/pull/333

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21 22 23 24 25 26 27 28 29

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21 22 23 24 25 26 27 28 29

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windowLightStatusBar ✗ windowLightNavigationBar ✗ statusBarColor #66000000 navigationBarColor #66000000 API21 22

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windowLightStatusBar true windowLightNavigationBar ✗ statusBarColor transparent navigationBarColor #66000000 API23 24 25 26

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windowLightStatusBar true windowLightNavigationBar ✗ statusBarColor transparent navigationBarColor #66000000 API23 24 25 26

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windowLightStatusBar true windowLightNavigationBar true statusBarColor transparent navigationBarColor #B3FFFFFF API27 28

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windowLightStatusBar true windowLightNavigationBar true statusBarColor transparent navigationBarColor #B3FFFFFF API27 28

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windowLightStatusBar true windowLightNavigationBar true statusBarColor transparent navigationBarColor transparent API29

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windowLightStatusBar ✗ / false windowLightNavigationBar ✗ / false statusBarColor transparent navigationBarColor #B3000000 API21 ~ 28

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windowLightStatusBar ✗ / false windowLightNavigationBar ✗ / false statusBarColor transparent navigationBarColor transparent API29

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<item name="android:windowLightStatusBar" tools:targetApi="m">@bool/ use_light_status</item> <item name="android:windowLightNavigationBar" tools:targetApi=“o_mr1">@bool/use_light_navigation</item>

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<item name="android:windowLightStatusBar" tools:targetApi="m">@bool/ use_light_status</item> <item name="android:windowLightNavigationBar" tools:targetApi=“o_mr1">@bool/use_light_navigation</item>

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<item name="android:windowLightStatusBar" tools:targetApi="m">@bool/ use_light_status</item> <item name="android:windowLightNavigationBar" tools:targetApi=“o_mr1">@bool/use_light_navigation</item> true values-notnight-v23

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<item name="android:windowLightStatusBar" tools:targetApi="m">@bool/ use_light_status</item> <item name="android:windowLightNavigationBar" tools:targetApi=“o_mr1">@bool/use_light_navigation</item> true values-notnight-v23 false values

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<item name="android:windowLightStatusBar" tools:targetApi="m">@bool/ use_light_status</item> <item name="android:windowLightNavigationBar" tools:targetApi=“o_mr1">@bool/use_light_navigation</item>

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@bool/ use_light_status @bool/use_light_navigation true values-notnight-v27

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true values-notnight-v27 false values @bool/ use_light_status @bool/use_light_navigation

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<item name="android:statusBarColor">@color/status_bar_scrim</item> <item name="android:navigationBarColor">@color/nav_bar_scrim</item>

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<item name="android:statusBarColor">@color/status_bar_scrim</item> <item name="android:navigationBarColor">@color/nav_bar_scrim</item>

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<item name="android:statusBarColor">@color/status_bar_scrim</item> <item name="android:navigationBarColor">@color/nav_bar_scrim</item> values-night @color/transparent

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<item name="android:statusBarColor">@color/status_bar_scrim</item> <item name="android:navigationBarColor">@color/nav_bar_scrim</item> values-night @color/transparent values-notnight-v23 @color/transparent

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<item name="android:statusBarColor">@color/status_bar_scrim</item> <item name="android:navigationBarColor">@color/nav_bar_scrim</item> values-night @color/transparent values-notnight-v23 @color/transparent values @color/system_ui_scrim_black

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values-v29 <item name="android:statusBarColor">@color/transparent</item> <item name="android:navigationBarColor">@color/transparent</item>

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ςʔϚͰߏங͢Δ·ͱΊ • σΟϨΫτϦΛ૊Έ߹Θͤͯɺߏங͢Δ • values • values-night • values-notnight-v23 • values-notnight-v27 • values-v29 • API29͸transparentΛࢦఆ͢Δͱɺ͍͍ײ͡ʹഎܠ৭Λௐ੔ͯ͘͠Ε Δ

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StatusBarScrim

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No content

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class StatusBarScrim override fun onApplyWindowInsets(insets: WindowInsets): WindowInsets { if (insets != lastWindowInsets) { lastWindowInsets = insets // Set this view as invisible if there isn't a top inset visibility = if (insets.systemWindowInsetTop > 0) VISIBLE else INVISIBLE // Request a layout to change size requestLayout() } return insets }

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class StatusBarScrim override fun onApplyWindowInsets(insets: WindowInsets): WindowInsets { if (insets != lastWindowInsets) { lastWindowInsets = insets // Set this view as invisible if there isn't a top inset visibility = if (insets.systemWindowInsetTop > 0) VISIBLE else INVISIBLE // Request a layout to change size requestLayout() } return insets }

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class StatusBarScrim override fun onApplyWindowInsets(insets: WindowInsets): WindowInsets { if (insets != lastWindowInsets) { lastWindowInsets = insets // Set this view as invisible if there isn't a top inset visibility = if (insets.systemWindowInsetTop > 0) VISIBLE else INVISIBLE // Request a layout to change size requestLayout() } return insets }

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InsetterϥΠϒϥϦ

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InsetterϥΠϒϥϦ • WindowInsetsɺSystemUiVisibilityΛ؆୯ʹѻ͏͜ͱ͕ग़དྷΔ void setEdgeToEdgeSystemUiFlags(View view, boolean enabled)

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InsetterϥΠϒϥϦ • WindowInsetsɺSystemUiVisibilityΛ؆୯ʹѻ͏͜ͱ͕ग़དྷΔ void setOnApplyInsetsListener(View view, OnApplyInsetsListener listener) public interface OnApplyInsetsListener { void onApplyInsets( View view, WindowInsetsCompat insets, ViewState initialState ); }

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• WindowInsetsɺSystemUiVisibilityΛ؆୯ʹѻ͏͜ͱ͕ग़དྷΔ void setOnApplyInsetsListener(View view, OnApplyInsetsListener listener) public interface OnApplyInsetsListener { void onApplyInsets( View view, WindowInsetsCompat insets, ViewState initialState ); } view.updatePadding( top = view.paddingTop + insets.systemWindowInsetTop )

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• WindowInsetsɺSystemUiVisibilityΛ؆୯ʹѻ͏͜ͱ͕ग़དྷΔ void setOnApplyInsetsListener(View view, OnApplyInsetsListener listener) public interface OnApplyInsetsListener { void onApplyInsets( View view, WindowInsetsCompat insets, ViewState initialState ); } view.updatePadding( top = view.paddingTop + insets.systemWindowInsetTop ) setOnApplyWindowInsetsListener͸ෳ਺ճίʔϧ͞ΕΔͷͰɺ͜Εͩͱμϝ

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• WindowInsetsɺSystemUiVisibilityΛ؆୯ʹѻ͏͜ͱ͕ग़དྷΔ void setOnApplyInsetsListener(View view, OnApplyInsetsListener listener) public interface OnApplyInsetsListener { void onApplyInsets( View view, WindowInsetsCompat insets, ViewState initialState ); } view.updatePadding( top = initialState.paddings.top + insets.systemWindowInsetTop )

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ࢀߟ • https://github.com/google/iosched • https://medium.com/androiddevelopers/gesture-navigation- going-edge-to-edge-812f62e4e83e • https://medium.com/androiddevelopers/why-would-i-want- to-fitssystemwindows-4e26d9ce1eec • https://speakerdeck.com/ytakahashi/xiang-jie-windowinsets • https://satoshun.github.io/2020/01/android- fitssystemwindows/

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DroidKaigi 2020 System UIΛίϯτϩʔϧͯ͠ɺ ը໘Λ࠷େݶʹੜ͔ͨ͠ΞϓϦΛߏங͢Δ Sato Shun GitHub: satoshun Twitter: @stsn_jp CyberAgent, Inc.