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BluetoothDevice.getName()に裏切られた話

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Avatar for Moyuru Aizawa Moyuru Aizawa
September 01, 2023
Programming
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 BluetoothDevice.getName()に裏切られた話

Avatar for Moyuru Aizawa

Moyuru Aizawa

September 01, 2023
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Transcript

  1. BluetoothDevice.getName()ʹ ཪ੾ΒΕͨ࿩ @MoyuruAizawa

  2. Moyuru Aizawa Software Engineer of Catlog, RABO. Previously at Azit,

    CyberAgent, and Eureka. Love Metal, Hardcore and EDM. MoyuruAizawa

  3. ಛʹΦνͷͳ͍࿩Λ͠·͢

  4. None

  5. ͜ΕΒͷϋʔυ΢ΣΞͷηοτΞοϓ͸ Android͔ΒBluetoothܦ༝Ͱߦͬͯ·͢

  6. ϋʔυ΢ΣΞͱ͸ BluetoothDevice/BluetoothGatt ͱ͍͏APIΛ௨ͯ͡௨৴͠·͢

  7. BluetoothDevice.getName()Ͱ ϋʔυ΢ΣΞͷnameΛऔಘͰ͖·͢

  8. AndroidͷBluetoothLeScannerΛ ͔ͭͬͯपғͷσόΠεΛݕࡧ͢Ε͹ Θ͔Γ·͕͢

  9. Catlog੡ͷϋʔυ΢ΣΞʹ͸͢΂ͯ ݸମݻ༗ͷname͕ઃఆ͞Ε͍ͯ·͢

  10. BluetoothDevice.getName()ͷ ฦΓ஋͸nullableͷStringͰ͕͢

  11. Catlogͷϋʔυ΢ΣΞ૬खͳΒ ඞͣString͕ฦͬͯ͘Δ͜ͱ͕ ظ଴͞Ε·͢

  12. None

  13. 14 betaΛೖΕͯࢼͨ݁͠Ռ BluetoothDevice.getName()ͷڍಈ͕ ͓͔͍͜͠ͱ͕൑໌

  14. Catlog HomeͷWi-FiઃఆͷͨΊʹ
 पғͷCatlog HomeΛscan
 
 ͜ͷ࣌఺Ͱ͸Catlog Homeͷname͕औಘͰ͖͍ͯΔ

  15. ઃఆϑϩʔΛਐΊͯߦͬͯ ͜ͷը໘Ͱprimary buttonΛԡ͢ͱ ΋͏Ұ౓BluetoothDevice.getName()Λ͠·͢

  16. ͵ΔΆ

  17. લͷը໘Ͱ͸name͕ظ଴௨Γʹฦͬ ͖͍͕ͯͯͨŊͳ͔ͥnull͕ฦͬͯ͘Δ

  18. ͳͥ…?

  19. ͨΊ͠ʹ͜ͷը໘ͰLaunchedEffectΛ͔ͭͬͯ
 BluetoothDevice.getName()Λ࣮ߦ͢Δͱ…

  20. ͪΌΜͱname͕ฦͬͯ͘Δ!!

  21. 🤔

  22. ࢼ͠ʹŊ͜ͷը໘ΑΓલͷը໘ͰߦΘ Ε͍ͯΔBluetoothGattʹΑΔຊ֨త ͳ௨৴Λ͢΂ͯল͍ͯΈΔ

  23. primary buttonΛԡͯ͠
 BluetoothDevice.getName()Λ࣮ߦ͢Δͱ…

  24. ͪΌΜͱname͕ฦ͖ͬͯͨ!!

  25. ŪƄŴƄŧƄũƄ….

  26. ‣ ࠷ॳͷBluetoothDevice.getName()͸ਖ਼ৗ ‣ ී௨ʹύεϫʔυೖྗը໘ʹભҠ͖ͯͯ͠Ŋ઀ଓϘλϯԡ͞Εͯ getName -> null ‣ ී௨ʹύεϫʔυೖྗը໘ʹભҠ͖ͯͯ͠ŊLaunchedEffectͰ͍͖ͳ ΓgetName

    -> ͱΕΔ ‣ લը໘ΛͿͬͱ͹ͯ͠ύεϫʔυೖྗը໘ʹભҠŊ͸͡Ίͯ BluetoothDeviceͱconnect͢ΔλΠϛϯάͰgetName -> ͱΕΔ ͜͜·ͰͰΘ͔͍ͬͯΔ͜ͱ

  27. BluetoothDevice.getNameͷ υΩϡϝϯτͱ࣮૷ΛΈͯΈΑ͏

  28. None
  29. None

  30. BluetoothDevice.getName͸ Ωϟογϡͨ͠nameΛଈ࣌ฦ͢ Ωϟογϡ͕ͳ͔ͬͨΒnullʹͳΓ͑ΔŇ ͦΕ͸ͦ͏Ň

  31. ͍··Ͱ(Android 13·Ͱ)Ͱ؍ଌͨ͜͠ͱ͸ͳ͔͕ͬͨ APIͷ࢓༷ͱͯ͠͸ى͖ಘΔ (ͱ͸͍͑όάͩͱ͸ࢥ͏Μ͚ͩͲ)

  32. ΑʔΘ͔ΒΜ͔Βਖ਼ࣜϦϦʔεΛ·ͪ ͭͭŊͱΓ͋͑ͣҰ౓ͱΕͨname͸େ ࣄʹେࣄʹը໘ؒΛӪ͖ճ͠ͱ͘

  33. ͓͠·͍