Scanning needs user request for location permission

[bojingo]

Scan results in "java.lang.SecurityException: Need ACCESS_COARSE_LOCATION or ACCESS_FINE_LOCATION permission to get scan results". Running on Marshmallow.

[chaunceyyann]

I added the location permission to the sample code and it work, dont know why it needs location thought, maybe for beacon?

[Anjlo]

Apparently for SDK > 23 you need to ask the user for those permissions. If you set it to SDK < 22 you won't need to prompt the user for permissions.

The target SDK is set to 24 so it won't work unless you put a prompt in.

I set the target SDK to 22, change the dependencies to v22 and it shows the devices. Success!

http://stackoverflow.com/questions/33149814/prompting-for-location-permission-when-not-monitoring-in-background

[nielsz]

For Android N: Add the following permissions,

<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>

and go to Settings / Apps / BluetoothLeGatt / Permissions and enable Location.

[Archelephant]

Alternatively, insert this check in OnCreate method for main activity:

int permissionCheck = ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION); if (permissionCheck != PackageManager.PERMISSION_GRANTED){ if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.ACCESS_FINE_LOCATION)){ Toast.makeText(this, "The permission to get BLE location data is required", Toast.LENGTH_SHORT).show(); }else{ requestPermissions(new String[]{Manifest.permission.ACCESS_COARSE_LOCATION, Manifest.permission.ACCESS_FINE_LOCATION}, 1); } }else{ Toast.makeText(this, "Location permissions already granted", Toast.LENGTH_SHORT).show(); }

[Dharmesh-Kudos]

I just needs to clear one doubt, that why we need to turn the device location ON while scanning the beacons?

[r1nkel]

@Dharmesh-Kudos Thanks for the idea turning ON device location. Now my scan works.

[DanielMarantz]

You do not need both permissions.

If you need the users exact location use this: <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/> you don't need the other permission if you have this one, but this permission is more resource intensive and will cost the user more data, also way less privacy.

Use: <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/> If you don't need the location of the user updating every couple of seconds and want to keep the user a little more private.

Both permissions will grant you the permission to scan BLE devices.

[manojdcoder]

On an Android 10 (Pixel 4), onScanResult callback is never executed with ACCESS_COARSE_LOCATION permission. It starts working only after obtaining ACCESS_FINE_LOCATION.