Altbeacon库：每秒刷新RSSI不止一次

Question

免责声明：android编程新手。

public class MainActivity extends AppCompatActivity implements BeaconConsumer{


protected static final String TAG = "info";
private BeaconManager beaconManager;
private HashSet<Beacon> beaconsSeen = new HashSet<Beacon>();

Region region1 = new Region("region1", "xx:xx:xx:xx:xx:xx");
Region region2 = new Region("region2", "xx:xx:xx:xx:xx:xx");
Region region3 = new Region("region3", "xx:xx:xx:xx:xx:xx");
Region region4 = new Region("region4", "xx:xx:xx:xx:xx:xx");
Region region5 = new Region("region5", "xx:xx:xx:xx:xx:xx");
Region region6 = new Region("region6", "xx:xx:xx:xx:xx:xx");

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    RangedBeacon.setSampleExpirationMilliseconds(5000); //collects signal measurements over 5 seconds, throws out the top 10% and bottom 10% of
    // measurements, and averages the rest
    beaconManager = BeaconManager.getInstanceForApplication(this);
    // To detect proprietary beacons, you must add a line like below corresponding to your beacon
    // type.  Do a web search for "setBeaconLayout" to get the proper expression.
     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
protected void onDestroy() {
    super.onDestroy();
    beaconManager.unbind(this);
}
@Override
public void onBeaconServiceConnect() {
    beaconManager.addRangeNotifier(new RangeNotifier() {
        @Override
        public void didRangeBeaconsInRegion(Collection<Beacon> beacons, Region region) {
            for (Beacon beacon : beacons) {
                Log.i(TAG, "I see a beacon "+beacon.getBluetoothAddress()+" with rssi: "+beacon.getRssi()+" dBm about "+beacons.iterator().next().getDistance()+" meters away.");
            }
        }
    });

    try {
        beaconManager.startRangingBeaconsInRegion(region1);
        beaconManager.startRangingBeaconsInRegion(region2);
        beaconManager.startRangingBeaconsInRegion(region3);
        beaconManager.startRangingBeaconsInRegion(region4);
        beaconManager.startRangingBeaconsInRegion(region5);
        beaconManager.startRangingBeaconsInRegion(region6);
    } catch (RemoteException e) {    }
}

Answer 1

该库被设计为每个测距周期只向DidrangeBeaconsinRegion发送一个回调（默认情况下基于1.1秒扫描）。无论收到多少数据包，这都是正确的，并且在内部跟踪单个RSSI读数，并且

可以通过减少扫描周期的长度来增加回调的频率。下面的代码将扫描周期更改为100ms，因此您将在该间隔内获得范围更新。

beaconManager.setForegroundScanPeriod(100l);
beaconManager.updateScanPeriods();