BluetoothDevice.getName()に裏切られた話

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·͢
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·͢
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
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. ͓͠·͍