android - 从后台服务估计信标区域检测

Question

我最近开始测试 Estimote Beacons，我试图在进入信标区域时从后台服务启动通知，但不幸的是我的解决方案不起作用。它不会给出错误，但在发现信标时不会启动通知。我不知道这是一些代码错误还是只是做错了。我读过 this另一个问题，但它似乎有点不同，因为我使用的是服务而不是 Activity ，但也许答案是相似的(应用程序上下文相关)......

这是我的服务代码

public class BeaconsMonitoringService extends Service{

    private BeaconManager beaconManager;

    private String user;

    @Override
      public void onCreate() {
        // Configure BeaconManager.
        beaconManager = new BeaconManager(this);

      }

      @Override
      public int onStartCommand(Intent intent, int flags, int startId) {
          Toast.makeText(this, "Beacons monitoring service starting", Toast.LENGTH_SHORT).show();

          user = intent.getStringExtra("user");

            // Check if device supports Bluetooth Low Energy.
            if (!beaconManager.hasBluetooth()||!beaconManager.isBluetoothEnabled()) {
              Toast.makeText(this, "Device does not have Bluetooth Low Energy or it is not enabled", Toast.LENGTH_LONG).show();
              this.stopSelf();
            }

              connectToService();


          // If we get killed, after returning from here, restart
          return START_STICKY;
      }

      @Override
      public IBinder onBind(Intent intent) {
          // We don't provide binding, so return null
          return null;
      }

      @Override
      public void onDestroy() {
        Toast.makeText(this, "Beacons monitoring service done", Toast.LENGTH_SHORT).show();
      }

      private void connectToService() {


          beaconManager.connect(new BeaconManager.ServiceReadyCallback() {

            @Override
            public void onServiceReady() {
                notifyEnterRegion(0);
//            try {
                  beaconManager.setBackgroundScanPeriod(TimeUnit.SECONDS.toMillis(1), 0);
                  Log.i("BEACOON ", "ANTES DE");
                  beaconManager.setMonitoringListener(new MonitoringListener() {
                    @Override
                    public void onEnteredRegion(Region region, List<Beacon> beacons) {
                      Log.i("BEACOON ", String.valueOf(beacons.get(1).getMinor()));
                    for (Beacon beacon: beacons){
                        Log.i("BEACOON ", String.valueOf(beacon.getMinor()));
                        if (beacon.getMinor() == 64444) {

                            notifyEnterRegion(6444);

                        } else if (beacon.getMinor() == 36328) {

                            notifyEnterRegion(36328);

                        } else if (beacon.getMinor() == 31394) {

                            notifyEnterRegion(31394);

                        }
                    }
                    }

                    @Override
                    public void onExitedRegion(Region region) {

                        notifyExitRegion();

                    }
                  });  

            }
          });
        }

      public void notifyEnterRegion(int code) {

            Toast.makeText(this, "Beacon "+code, Toast.LENGTH_SHORT).show();

            Intent targetIntent = new Intent(this, MainActivity.class);
            PendingIntent contentIntent = PendingIntent.getActivity(this, 0, targetIntent, PendingIntent.FLAG_UPDATE_CURRENT);

            Notification noti = new Notification.Builder(this)
             .setContentTitle("Bienvenido "+user+"!")
             .setContentText("Sólo por estar aquí has ganado....")
             .setSmallIcon(com.smt.beaconssmt.R.drawable.beacon_gray)
             .setContentIntent(contentIntent)
             .getNotification();

            NotificationManager nManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
            nManager.notify(1, noti);
        }

      public void notifyExitRegion(){

            AlertDialog.Builder builder = new AlertDialog.Builder(this);

            builder.setMessage("Hasta pronto!")
                   .setTitle(user+", estás abandonando la zona de beacons");

            builder.setPositiveButton("Ver web", new DialogInterface.OnClickListener() {
                       public void onClick(DialogInterface dialog, int id) {
                           // User clicked OK button
                           Intent i = new Intent(BeaconsMonitoringService.this, WebViewActivity.class);
                           i.putExtra("web", "http://www.google.com/");
                           startActivity(i);
                       }
                   });
            builder.setNegativeButton("Adios!", new DialogInterface.OnClickListener() {
                       public void onClick(DialogInterface dialog, int id) {
                           // User cancelled the dialog
                       }
                   });

            AlertDialog dialog = builder.create();

            dialog.show();
      }



}

我将非常感谢任何形式的帮助，在此先感谢!

Answer 1

这段代码对我有用。确保放置正确的 UUID、次要和主要编号。

//Using something like that as global variable

    private static final Region[] BEACONS = new Region[] { 
    new Region("beacon1", "uuid1", 1, 19227), //uuid without "-"
    new Region("beacon2", "uuid2", 1, 61690),
    new Region("beacon3", "uuid3", null, null)
};
//Note: setting minor == null and major == null will detect every beacon with that uuid

  @Override
  public int onStartCommand(Intent intent, int flags, int startId) {
      startMonitoring();
      return START_STICKY;
  }



private void startMonitoring() {
    if (beaconManager == null) {
        beaconManager = new BeaconManager(this);

        // Configure verbose debug logging.
        L.enableDebugLogging(true);

        /**
         * Scanning
         */
        beaconManager.setBackgroundScanPeriod(TimeUnit.SECONDS.toMillis(1), 1);

        beaconManager.setRangingListener(new RangingListener() {

            @Override
            public void onBeaconsDiscovered(Region paramRegion, List<Beacon> paramList) {
                if (paramList != null && !paramList.isEmpty()) {
                    Beacon beacon = paramList.get(0);
                    Proximity proximity = Utils.computeProximity(beacon);
                    if (proximity == Proximity.IMMEDIATE) {
                        Log.d(TAG, "entered in region " + paramRegion.getProximityUUID());
                        postNotification(paramRegion);
                    } else if (proximity == Proximity.FAR) {
                        Log.d(TAG, "exiting in region " + paramRegion.getProximityUUID());
                         removeNotification(paramRegion);
                    }
                }
            }

        });

        beaconManager.connect(new BeaconManager.ServiceReadyCallback() {
            @Override
            public void onServiceReady() {
                try {
                    Log.d(TAG, "connected");
                    for (Region region : BEACONS) {
                        beaconManager.startRanging(region);
                    }
                } catch (RemoteException e) {
                    Log.d("TAG", "Error while starting monitoring");
                }
            }
        });
    }
}

***编辑:计算准确度的代码

 public static double computeAccuracy(Beacon beacon)
 {
    if (beacon.getRssi() == 0) 
    {
       return -1.0D;
    }

    double ratio = beacon.getRssi() / beacon.getMeasuredPower();
    double rssiCorrection = 0.96D + Math.pow(Math.abs(beacon.getRssi()), 3.0D) % 10.0D / 150.0D;

    if (ratio <= 1.0D) 
    {
       return Math.pow(ratio, 9.98D) * rssiCorrection;
    }
    return (0.103D + 0.89978D * Math.pow(ratio, 7.71D)) * rssiCorrection;
 }

 public static Proximity proximityFromAccuracy(double accuracy)
 {
    if (accuracy < 0.0D) 
    {
        return Proximity.UNKNOWN;
    }
    if (accuracy < 0.5D) 
    {
        return Proximity.IMMEDIATE;
    }
    if (accuracy <= 3.0D) {
        return Proximity.NEAR;
    }
    return Proximity.FAR;
}



 public static Proximity computeProximity(Beacon beacon) {
     return proximityFromAccuracy(computeAccuracy(beacon));
 }