Scan result name is null about android-scanner-compat-library HOT 8 CLOSED

nRF Connect is not using the scanner Compat Library. It actually allows you to switch between new and old scanning API in settings.
But in the app I'm not taking the name from BluetoothDevice, instead i parse the raw data. In the scanner library you may get the name from result.getRecord().getName(). Such name is parsed from the received data, not taken from phone's cache. The name in BluetoothDevice object gets overridden by value from Device Name characteristic after connection and may be cashed and not updated.

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This is very weird, i do tried to take the bytes from scan record but only 0-30 indexes had a value the rest 31-63 was zeroes, and from debugging i saw that the name is sit in 31-42 indexes .

from android-scanner-compat-library.

The raw bytes contain both advertising data and scan response data, if such is present. Reach of them is 0-31 bytes going. The rest of the array indeed is filled with zeros. Perhaps your phone indirectly puts scan response to the raw data and then fails to parse it?

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I really don't know why this happens, because the bluetooth device for sure send the scan response (other phones can see it) , the real question is why the NrfConnect app do see 80% of our ble devices ( we develop smart locks with ble) , where i make the check i have about 200 - 400 ble devices, and my custom bytes parsing show that the are no name contained in the data.

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If you're parsing the raw data manually, did you check Shortened Local Name field? It also may contain the name.

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I checked, the short name not included in the data.

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Hi,

I am facing the same problem . I can not get names from either getDevice() or getScanRecord(). I am working on android 9 as well. I get null for 99% of the times but sometimes i get a device name. While the NRF connect app shows those devices with names.

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Hi, @khan-07 i think i found the root cause for this problem and even the solution (not tried yet)
Look at the last answer here

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