Android device can't scan beacon

Question

I'm working on a simple beacon proximity app using AltBeacon library from here https://altbeacon.github.io/android-beacon-library/samples.html.

I am experimenting with the sample code provided on the above website, however, each time I run the app it only goes to addRangingNotifier() method. If it detected the beacon it would go log the beacon size.

private Region defaultRegion = null;
defaultRegion = new Region("BeaconIdentifier", Identifier.fromUuid(java.util.UUID.fromString(UUID)), null, null);
beaconManager = BeaconManager.getInstanceForApplication(this);
beaconManager.getBeaconParsers().add(new BeaconParser().setBeaconLayout("m:2-3=0215,i:4-19,i:20-21,i:22-23,p:24-24"));
beaconManager.bind(this);

@Override
public void onBeaconServiceConnect() {
   beaconManager.addRangeNotifier(new RangeNotifier() {
      @Override
      public void didRangeBeaconsInRegion(Collection<Beacon> beacons, Region region) {
         if (beacons.size() > 0) {
            Log.d("MainInfo","Beacon List Size " + beacons.size());
         }else{
            Log.d("MainInfo","Beacon Empty");
         }
      }
   });
   try {
      beaconManager.startRangingBeaconsInRegion(defaultRegion);
   } catch (RemoteException e) {}
}

I can receive the beacon size around of me.
I test the two device(A : Samsung galaxy J510-Marshmellow/B: Samsung galaxy J7-Nougat), B scan the beacon and print Beacon List Size, but, A can't scan the beacon and print Beacon Empty.

So I test same Marshmellow device, but I can't find it.

Are there any codes that should be added depending on the operating system?

Maybe worth checking that if the location permission is granted to the app on the phone? — Ricky Mo
@davidgyoung yes. when I change dependencies { implementation 'org.altbeacon:android-beacon-library:2+' } to AAR file (in project structure and import aar file), it show the scan result. So now I can scan. Thank you for your answer — Polaris Nation

davidgyoung davidgyoung · Accepted Answer · 2018-11-20T03:39:19

The most likely thing wrong is that the UUID specified does not match your beacon. Try replacing this code:

  Identifier.fromUuid(java.util.UUID.fromString(UUID))

With

  null

To match all beacons. If this fixes it, replace the UUID with the one you are out of the detected beacon.

Android device can't scan beacon

1 Answers