1ヶ月でAndroidカメラアプリ開発(2/4)

by sakebook

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̍ϲ݄Ͱ ANDROIDΧϝϥΞϓϦ։ൃ @Trunk ञຊ৳໵ 2016/3/20

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ຊ೔ͷྲྀΕ • ϨΠΞ΢τͷجຊ஌ࣝ • ActivityͷϥΠϑαΠΫϧ • ΠϕϯτϋϯυϦϯά • Widgetͷঢ়ଶ؅ཧ • (Χϝϥݺͼग़͠) • (ը૾ड͚औΓ) • Aviaryઃఆ

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ACTIVITY

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ACTIVITY ≒ ը໘ • Activity͸UIΛ࣋ͭը໘ʹ͸ඞਢ • ը໘͸xmlͰ࡞Δ • ಈతʹੜ੒͍ͨ͠΋ͷ͸ίʔυͰఆٛ • ը໘Λߏ੒͢Δxml͸  ϨΠΞ΢τͱ΢ΟδΣοτͰ੒Γཱͭ

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LAYOUT

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LAYOUT • Widget΍ViewΛҰఆͷنଇʹج͖ͮ഑ஔ͢Δ ͨΊͷ΋ͷ • ҰͭͷxmlʹϨΠΞ΢τ͸ෳ਺͋ͬͯ΋ྑ͍ • ਌ͷϨΠΞ΢τ͸ඞͣҰͭ

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͍͔ͭ͘঺հ • LinearLayout • ্͔ΒԼɺࠨ͔ΒӈͳͲɺॱংʹ٧Ίͯ഑ஔ͢ΔϨΠΞ΢τ • RelativeLayout • ഑ஔͨ͠ଞͷίϯϙʔωϯτͱͷҐஔؔ܎Λఆٛ͠ͳ͕Β  ഑ஔ͢ΔϨΠΞ΢τ • FrameLayout • ࠨ্Λى఺ͱͯ͠ɺࢠཁૉͰ͋Δͱ͖΋  લ໘ʹදࣔ͞ΕΔϨΠΞ΢τ

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XMLͷઃఆ • setContentView(Int id)

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• εςʔλεόʔ • ΞΫγϣϯόʔ  (πʔϧόʔ) • φϏήʔγϣϯόʔ ϨΠΞ΢τ෦෼

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WIDGET

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WIDGET

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ߴසग़ • Button • ϘλϯΛ഑ஔ͍ͨ͠ͱ͖ʹ࢖͏ • TextView • ܾΊΒΕͨจࣈΛ഑ஔ͍ͨ͠ͱ͖ʹ࢖͏ • ImageView • ը૾Λද͍ࣔͨ͠ͱ͖ʹ࢖͏

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࣮श • ࣗ෼͕࡞Γ͍ͨΞϓϦͷϨΠΞ΢τΛߟ͑ ࣮૷ͯ͠ΈΔ

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ϥΠϑαΠΫϧ

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ϥΠϑαΠΫϧ • Activityಉ࢜ͷԁ׈ͳ΍ΓऔΓΛॿ௕͢Δ • ෳ਺ͷActivity • ϥΠϑαΠΫϧ ≒ ঢ়ଶભҠ

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• onCreate • Activity͕ॳΊͯ  ࡞ΒΕͨͱ͖ • onStart • Activity͕Ϣʔβʹ  ݟ͑ΔΑ͏ʹͳΔ௚લ

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• onResume • Activity͕  දࣔ͞Εͨͱ͖ • onPause • ผͷActivity͕  දࣔ͞ΕΔͱ͖

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• onStop • Activity͕  ݟ͑ͳ͘ͳͬͨ࣌ • onRestart • Activity͕ఀࢭͨ͠ޙ  ࠶౓։࢝͞ΕΔ௚લ

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• onDestroy • Activity͕  ഁغ͞ΕΔ௚લ • Activity͕ड͚औΔ  ࠷ޙͷݺͼग़͠ 

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ৄࡉ • http://dev.classmethod.jp/smartphone/android/ android-tips-21-activity-lifecycle/

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ΠϕϯτϋϯυϦϯά

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ΠϕϯτϋϯυϦϯά • Πϕϯτ • ϢʔβͷԿ͔͠Βͷߦಈ΍  ಺෦ͷॲཧͷಛఆͷλΠϛϯά • ΠϕϯτΛద੾ͳλΠϛϯάͰΩϟον͠  ద੾ͳॲཧΛߦ͏ɻ

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ϘλϯΛΫϦοΫ • ButtonͷWidgetΛઃஔ • Button͕ΫϦοΫ͞Εͨ࣌ʹߦ͏ॲཧΛهड़ • ButtonͷΫϦοΫΠϕϯτΛϋϯυϦϯά

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BUTTONͷWIDGETΛઃஔ • xml

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BUTTON͕ΫϦοΫ͞Εͨ࣌ ʹߦ͏ॲཧΛهड़ • setOnClickListenerʹ࣮૷Λ౉ͯ͋͛͠Δ • Listener = Interface

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࣮૷ ϋϯυϦϯά

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ϋϯυϦϯά + ࣮૷

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࣮૷? ϋϯυϦϯά

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ผΫϥεͰ࣮૷ • MyCustomClick.class

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࣮૷? ϋϯυϦϯά

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ಉ͡ΫϥεͰ࣮૷ • ࣮૷͕هड़͞Ε͍ͯΔͷͰthis͕࢖͑Δɻ

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࣮૷͠·͢એݴ

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SET_ON_CLICKҎ֎ͷϦεφʔ • setOn̋̋Ͱ༻ҙ͞Ε͍ͯΔɻ • ొ࿥/ղআ͕ඞཁͳ΋ͷ͸  add/remove  register/unregister  ͳͲɺ໋໊نଇͰ൑ผͰ͖Δ

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࣮श • ࣗ෼͕࡞Γ͍ͨΞϓϦͷ͍͔ͭ͘ͷwidgetͰ ΠϕϯτϋϯυϦϯάΛઃఆ͢Δ

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WIDGETͷঢ়ଶ

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BUTTON͕ΫϦοΫ͞Εͨ࣌ • ͳΜͲ΋ΫϦοΫͰ͖Δ • ΫϦοΫͰ͖͔ͨͲ͏͔Θ͔Βͳ͍ • ΫϦοΫՄೳͳঢ়ଶ͔ෆ໌

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ͳΜͲ΋ΫϦοΫͰ͖Δ • ϝʔϧΛૹΔͳͲɺෳ਺ճ͞Εͯ͸ࠔΔ΋ͷ ͕͋Δ • View#setEnabled(boolean) • Viewͷঢ়ଶΛɺ༗ޮ/ແޮʹ͢Δ

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ΫϦοΫͰ͖͔ͨͲ͏͔ Θ͔Βͳ͍ ΫϦοΫՄೳͳঢ়ଶ͔ෆ໌ • ϢʔβʹϑΟʔυόοΫΛ༩͑Δ

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ແޮͳঢ়ଶ ༗ޮͰ  ԡ͞Ε͍ͯΔঢ়ଶ ༗ޮͰ  ԡ͞Εͯͳ͍ঢ়ଶ

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AVIARY

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AVIARY • ΤσΟλʔػೳ͸ผSDK • https://creativesdk.adobe.com/docs/android/ #/articles/imageediting/index.html • Ұॹʹ΍͍͖ͬͯ·͠ΐ͏ɻ