Support Android 12 Bluetooth Permissions

[dononcharles]

With Android 12 comes two new bluetooth permissions that will replace Location Permission:

• Bluetooth Scan

• Bluetooth Connect

Am trying to scan on Android 12 phone but nothing happens

 withTimeoutOrNull(SCAN_DURATION_MILLIS) {
        scanner.advertisements
            .catch { cause -> _scanStatus.value = ScanStatus.Failed(cause.message ?: "Unknown error") }
            .onCompletion { _scanStatus.value = ScanStatus.Stopped }
            .distinctUntilChanged()
            .collectLatest { advertisement ->
                Logger.warn("$advertisement")
                _scanStatus.value = ScanStatus.AdvertisementFound(advertisement)
            }
    }

[dononcharles]

I came across a solution

fun requestLocationPermission(requestMultiplePermissions: ActivityResultLauncher<Array<String>>) =
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
        requestAndroidSBlePermission(requestMultiplePermissions)
    } else
        requestMultiplePermissions.launch(arrayOf(Manifest.permission.ACCESS_FINE_LOCATION, Manifest.permission.ACCESS_COARSE_LOCATION))

fun requestAndroidSBlePermission(requestMultiplePermissions: ActivityResultLauncher<Array<String>>) =
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S)
        requestMultiplePermissions.launch(
            arrayOf(
                Manifest.permission.ACCESS_FINE_LOCATION,
                Manifest.permission.ACCESS_COARSE_LOCATION,
                Manifest.permission.BLUETOOTH_SCAN,
                Manifest.permission.BLUETOOTH_CONNECT
            )
        )
    else {
        Logger.info("Do nothing")
    }

private val requestMultiplePermissions = registerForActivityResult(ActivityResultContracts.RequestMultiplePermissions()) {permissions ->

}
     

[burnhamd]

I came across a solution

fun requestLocationPermission(requestMultiplePermissions: ActivityResultLauncher<Array<String>>) =
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
        requestAndroidSBlePermission(requestMultiplePermissions)
    } else
        requestMultiplePermissions.launch(arrayOf(Manifest.permission.ACCESS_FINE_LOCATION, Manifest.permission.ACCESS_COARSE_LOCATION))

fun requestAndroidSBlePermission(requestMultiplePermissions: ActivityResultLauncher<Array<String>>) =
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S)
        requestMultiplePermissions.launch(
            arrayOf(
                Manifest.permission.ACCESS_FINE_LOCATION,
                Manifest.permission.ACCESS_COARSE_LOCATION,
                Manifest.permission.BLUETOOTH_SCAN,
                Manifest.permission.BLUETOOTH_CONNECT
            )
        )
    else {
        Logger.info("Do nothing")
    }

private val requestMultiplePermissions = registerForActivityResult(ActivityResultContracts.RequestMultiplePermissions()) {permissions ->

}
     

@dononcharles I don't think the Manifest.permission.ACCESS_FINE_LOCATION, Manifest.permission.ACCESS_COARSE_LOCATION would be required anymore on versions S and up.

[twyatt]

0.21.0 includes improved permissions declarations as well as a Bluetooth.availability flow (but it does not yet handle permissions — but it probably should take into account permissions for the value it emits; I'll leave this ticket open as a reminder to add that functionality).

Although, it isn't planned that Kable will request permissions, as that is very app specific; so the code example you provided is the correct approach (aside from what was pointed out — that you don't need location permission, for BLE at least, on newer versions of Android).

[twyatt]

Actually, closing out this issue and rolling it into https://github.com/JuulLabs/kable/issues/420.