Play with Kotlin - Speaker Deck

Play with Kotlin

by yoppie

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KotlinͰ༡Ϳ

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Facebook hi.kowaii.de / Twitter @yoppie_x Github yoshiya12X / Qiita yoppie_x ϒϩά https://yoppiex.hatenablog.com/ yoppie

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Kotlinͱͷग़ձ͍ ιϑτ΢ΣΞ޻ֶͷݚڀ  AndroidΞϓϦͷιʔείʔυΛର৅ͱ͍ͯͨ͠  ࣗ෼Ͱ΋ͪΐͪ͜ΐ͜AndroidΞϓϦΛ࡞ͬͯͨ ֶ෦ େֶӃ

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Kotlinͱͷग़ձ͍ KotlinΛॻ͖࢝ΊΔ  (໊લ͕͔Θ͍͔ͬͨͷͰw) 2017೥1݄

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Kotlinͱͷग़ձ͍ ্ژ͠৽ଔͰαʔόʔαΠυΤϯδχΞʹͳΔ  Kotlin͸Ҿ͖ଓ͖झຯͰॻ͘ 2017೥4݄

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Kotlinͱͷग़ձ͍ GoogleIO  Kotlin͕AndroidΞϓϦ։ൃͷओཁݴޠͱͳΔ 2017೥5݄

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৐Δ͔͠ͳ͍ ͜ͷϏοά΢Σʔϒʹ

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ͪΌΜͱKotlinΛॻ͜͏  (ͱ͍͏͔༡΅͏)

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KotlinͰ༡Ϳ(part1) μʔπϘʔυͱ࿈ܞͨ͠  DartsXͱ͍͏ΞϓϦΛͭͬͯ͘༡Ϳ 2017೥6݄~10݄

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KotlinͰ༡Ϳ(part1) ͪΐͪ͜ΐ͜Kotlin͞ΘΔ 2017೥10݄~2018೥4݄

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KotlinͰ༡Ϳ(part2) GoogleIO    ͜ͷ࣌ظʹͳΔͱ  Android or Kotlinͷษڧձ͸੝ΜʹͳΔ  (ؾ͕͢Δ) 2018೥5݄

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΋ͬͱਂ͘۷ΓԼ͛Δ  ༡ͼ͔ͨΛ͠Α͏

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Kotlinͱ༡Ϳ(part2) ֤ࣾͷΤϯδχΞϒϩάΛ  εϚχϡʔͬΆ͘ݟΒΕΔ  EngineerBlogsΛ࡞੒(ਐߦத) 2018೥6݄~ݱࡏ

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DataBindingͱPicasso

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͜Μͳ͜ͱ͋Γ·ͤΜ͔ DataBindingΛར༻͍ͯ͠ΔAndroidΞϓϦͰɺ Picasso΍GlideͰImageViewʹ  ը૾Λද͍ࣔͤͨ͞

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͜Μͳ͜ͱ͋Γ·ͤΜ͔ DataBindingΛར༻͍ͯ͠ΔAndroidΞϓϦͰɺ Picasso΍GlideͰImageViewʹ  ը૾Λද͍ࣔͤͨ͞ BindingAdapter

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XMLͷ αϯϓϧ

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XMLͷ αϯϓϧ

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Custom Binding KotlinͬΆ͘ImageViewͷ֦ுؔ਺Λ࢖ͬͯΈͨ

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https://qiita.com/yoppie_x/items/ afcf582c083918c2c719

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KotlinͱGson

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KotlinͱGson͸૬ੑ͕ѱ͍ non-nullͳϓϩύςΟʹnull͕  ೖͬͯ͠·͏Մೳੑ

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KotlinͱGson͸૬ੑ͕ѱ͍ Kotlinͷੑ্࣭id, name, img͸non-null img͕ͳ͍jsonΛparse͢Δ ྫ֎͕throw͞Εͣɺimgʹnull͕ೖΔ

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MoshiΛ࢖͏ Kotlin extension  Kotlinͷclass΁ͷύʔεΛαϙʔτ  nullͷ৔߹parse࣌ʹྫ֎͕throw͞ΕΔ build.gradle

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Retroﬁt2ͱMoshiͷ࣮૷ྫ

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https://qiita.com/yoppie_x/items/ bbc0ca7a4c8a4b29e141

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KotlinͱRxBinding2

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RxBinding2 • Jake Wharton࡞ • ViewͰͷΠϕϯτʹର༷ͯ͠ʑͳ৚݅ͳͲΛ ෇༩͠subscribe͢Δ͜ͱͰViewͰͷΞΫγϣ ϯΛ੍ޚ • Kotlin࢓༷ʹ֦ு͞Ε͍ͯΔϥΠϒϥϦΛར༻

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RxBinding2 • rxbinding-kotlin • rxbinding-recyclerview-v7-kotlin • rxbinding-appcompat-v7-kotlin • rxbinding-support-v4-kotlin • rxbinding-design-kotlin • rxbinding-leanback-v17-kotlin

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ಋೖ build.gradle

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ಋೖ build.gradle -kotlin͕ඞཁ

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rxbinding-kotlin OnClickListenerΑΓγϯϓϧ

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rxbinding-recyclerview-v7-kotlin RecyclerViewͰεΫϩʔϧ͕Ұ൪Լ·Ͱ͍ͬͨΒ ϩʔυ͢Δ࣮૷

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rxbinding-support-v4-kotlin Support-v4 LibraryͰಋೖͰ͖ΔViewʹର͢Δ ΞΫγϣϯΛ੍ޚ (ྫ)SwipeRefreshLayout

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KotlinͰRxBinding2Λ  ࢖ͬͯΈͨײ૝ • ৘ใ͕গͳ͍ͷ͕͖͍ͭ • ϝιουνΣʔϯͰ͔͚Δͷ͕͍͍ • Viewͷϓϩηεͷάϧʔϐϯά • Kotlinͷ֦ுؔ਺, ଞͷRxܥͷϥΠϒϥϦͱ  ૊Έ߹ΘͤΔ͜ͱͰγϯϓϧʹͳΓͦ͏