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BluetoothDevice.getName()に裏切られた話
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Moyuru Aizawa
September 01, 2023
Programming
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BluetoothDevice.getName()に裏切られた話
Moyuru Aizawa
September 01, 2023
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Transcript
BluetoothDevice.getName()ʹ ཪΒΕͨ @MoyuruAizawa
Moyuru Aizawa Software Engineer of Catlog, RABO. Previously at Azit,
CyberAgent, and Eureka. Love Metal, Hardcore and EDM. MoyuruAizawa
ಛʹΦνͷͳ͍Λ͠·͢
None
͜ΕΒͷϋʔυΣΞͷηοτΞοϓ Android͔ΒBluetoothܦ༝Ͱߦͬͯ·͢
ϋʔυΣΞͱ BluetoothDevice/BluetoothGatt ͱ͍͏APIΛ௨ͯ͡௨৴͠·͢
BluetoothDevice.getName()Ͱ ϋʔυΣΞͷnameΛऔಘͰ͖·͢
AndroidͷBluetoothLeScannerΛ ͔ͭͬͯपғͷσόΠεΛݕࡧ͢Ε Θ͔Γ·͕͢
CatlogͷϋʔυΣΞʹͯ͢ ݸମݻ༗ͷname͕ઃఆ͞Ε͍ͯ·͢
BluetoothDevice.getName()ͷ ฦΓnullableͷStringͰ͕͢
CatlogͷϋʔυΣΞ૬खͳΒ ඞͣString͕ฦͬͯ͘Δ͜ͱ͕ ظ͞Ε·͢
None
14 betaΛೖΕͯࢼͨ݁͠Ռ BluetoothDevice.getName()ͷڍಈ͕ ͓͔͍͜͠ͱ͕໌
Catlog HomeͷWi-FiઃఆͷͨΊʹ पғͷCatlog HomeΛscan ͜ͷ࣌ͰCatlog Homeͷname͕औಘͰ͖͍ͯΔ
ઃఆϑϩʔΛਐΊͯߦͬͯ ͜ͷը໘Ͱprimary buttonΛԡ͢ͱ ͏ҰBluetoothDevice.getName()Λ͠·͢
͵ΔΆ
લͷը໘Ͱname͕ظ௨Γʹฦͬ ͖͍͕ͯͯͨŊͳ͔ͥnull͕ฦͬͯ͘Δ
ͳͥ…?
ͨΊ͠ʹ͜ͷը໘ͰLaunchedEffectΛ͔ͭͬͯ BluetoothDevice.getName()Λ࣮ߦ͢Δͱ…
ͪΌΜͱname͕ฦͬͯ͘Δ!!
🤔
ࢼ͠ʹŊ͜ͷը໘ΑΓલͷը໘ͰߦΘ Ε͍ͯΔBluetoothGattʹΑΔຊ֨త ͳ௨৴Λͯ͢ল͍ͯΈΔ
primary buttonΛԡͯ͠ BluetoothDevice.getName()Λ࣮ߦ͢Δͱ…
ͪΌΜͱname͕ฦ͖ͬͯͨ!!
ŪƄŴƄŧƄũƄ….
‣ ࠷ॳͷBluetoothDevice.getName()ਖ਼ৗ ‣ ී௨ʹύεϫʔυೖྗը໘ʹભҠ͖ͯͯ͠ŊଓϘλϯԡ͞Εͯ getName -> null ‣ ී௨ʹύεϫʔυೖྗը໘ʹભҠ͖ͯͯ͠ŊLaunchedEffectͰ͍͖ͳ ΓgetName
-> ͱΕΔ ‣ લը໘ΛͿͬͱͯ͠ύεϫʔυೖྗը໘ʹભҠŊ͡Ίͯ BluetoothDeviceͱconnect͢ΔλΠϛϯάͰgetName -> ͱΕΔ ͜͜·ͰͰΘ͔͍ͬͯΔ͜ͱ
BluetoothDevice.getNameͷ υΩϡϝϯτͱ࣮ΛΈͯΈΑ͏
None
None
BluetoothDevice.getName Ωϟογϡͨ͠nameΛଈ࣌ฦ͢ Ωϟογϡ͕ͳ͔ͬͨΒnullʹͳΓ͑ΔŇ ͦΕͦ͏Ň
͍··Ͱ(Android 13·Ͱ)Ͱ؍ଌͨ͜͠ͱͳ͔͕ͬͨ APIͷ༷ͱͯ͠ى͖ಘΔ (ͱ͍͑όάͩͱࢥ͏Μ͚ͩͲ)
ΑʔΘ͔ΒΜ͔Βਖ਼ࣜϦϦʔεΛ·ͪ ͭͭŊͱΓ͋͑ͣҰͱΕͨnameେ ࣄʹେࣄʹը໘ؒΛӪ͖ճ͠ͱ͘
͓͠·͍