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@akatsuki174 AndroidΞϓϦ։ൃͷ ໘ന͍τίϩ
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ࣗݾհ
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• ਢ౻ຘʢ@akatsuki174ʣ • iOSΤϯδχΞ • TechTrain ϝϯλʔ • ϋϯυϝΠυ࡞Ո • DXELओ࠵ • TECH PLAYঁࢠ෦ ڞಉද • Women In Technology (WITY) ઃ ϝϯόʔ ͦͷଞॾʑ
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֓ཁ
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;ΜΘΓ֓ཁ ࠷ۙAndroidΞϓϦ։ൃΛ࢝Ίͨࢲͷࢹ͔Βɺ ʮAndroidʢKotlinʣͬͯ͜Μͳ͜ͱͰ͖ΔΜͩʯ ͱࢥͬͨͷΛ٧Ί߹Θ͓ͤͯ͑͠·͢ɻ ڵຯΛ͖͔͚࣋ͭͬʹͳΕͱ… ※ࠓհͨ͜͠ͱ ≠ Android։ൃͰॏཁͳ͜ͱ
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ࠓ͢͜ͱ ɾKotlin͔Θ͍͍ ɾϨΠΞτ࡞ָ͕ ɾAndroidͰଞͷΞϓϦͷϦιʔε͕͑Δ ɹɾจࣈྻ ɹɾը૾
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Kotlin
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Kotlinͱ ɾJetBrains͕2011ʹൃදͨ͠ݴޠ ɾJavaͱ100%૬ޓӡ༻Մೳ ɾɾJavaίʔυΛϖʔετͨ͠ΒࣗಈͰKotlin ɹɹίʔυʹॻ͖͑ͯ͘ΕͨΓ ɾGoogle I/O 2017ʹͯެࣜ࠾༻ ɾGoogle I/O 2019ʹͯਪݴޠ
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Kotlinͷಛ ɾ੩తܕ͚ ɾΦϒδΣΫτࢦ ɾNull҆શ ɾ؆ܿʹॻ͚Δ ɾΫϥΠΞϯταΠυαʔόαΠυॻ͚Δ etc…
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KotlinΫΠζ ̍- ͬͱ؆ܿʹॻ͚·͢ɻͲ͏ॻ͚ΔͰ͠ΐ͏ʁ if (data == null) return
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KotlinΫΠζ ̍- ͑ data ?: return ʮ?:ʯΤϧϏεԋࢉࢠɻԋࢉࢠͷࠨଆ͕nullͰ ͳ͚ΕͦΕΛฦ͠ɺnullͩͬͨΒӈଆΛฦ͢ɻ ※ KotlinͰreturnࣜ
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KotlinΫΠζ ̎- Javaͩͱ͜ͷΑ͏ʹॻ͘ॲཧɺKotlinͩͱ ͲͷΑ͏ʹॻ͚ΔͰ͠ΐ͏͔ʁ if (anyObject instanceof String) { String str = (String)anyObject; str.length; }
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KotlinΫΠζ ̎- ͑ if (anyObject is String) { anyObject.length } ܕͷνΣοΫͱΩϟετΛಉ࣌ʹߦͬͯ͘ΕΔ ʢεϚʔτΩϟετʣ
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ϨΠΞτ࡞
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AndroidͷϨΠΞτ࡞ ɾxmlͰUIཁૉΛهड़͍ͯ͘͜͠ͱɺktϑΝΠϧ ɹଆͰϨΠΞτཁૉͷΠϯελϯεΛ࡞͢Δ ɹ͜ͱͰ͖Δ ɾxmlͰUIΛهड़͢Δͱɺಈ࡞੍ޚίʔυͱ ɹUIදࣔίʔυΛ͚Δ͜ͱ͕Ͱ͖Δ
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AndroidͷϨΠΞτ࡞ ɾLayout Editor Λ͏ͱɺGUIͰૢ࡞͢Δ͚ͩͰ ɹϨΠΞτΛ࡞͢Δ͜ͱ͕Ͱ͖Δ
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σϞ ※ ͵Δ͵Δಈ͘GUIɺϨΠΞτ࡞ͷ؆୯͕͞ ɹΘ͔ΔΑ͏ͳͷΛݟͤΔ
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ଞΞϓϦͷϦιʔεΛ͏
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DroidKaigiʹͯ ʮAndroidଞͷΞϓϦͷϦιʔεΛ͏͜ͱ͕ Ͱ͖Δʯͱ͍͏Λฉ͖ɺͱͯؾʹͳ͍ͬͯͨ ͷͰࠓճௐͯΈͨ
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σϞ Qiitaهࣄ https://qiita.com/akatsuki174/items/ ff57714cbc57e5ce9909 αϯϓϧίʔυ https://github.com/akatsuki174/ UseOtherAppResourceSample
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จࣈྻΛऔಘ͢Δίʔυ
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ը૾Λऔಘ͢Δίʔυ
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એ
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͝ਗ਼ௌ ͋Γ͕ͱ͏͍͟͝·ͨ͠ʂ