Detecting Beacons In Android

compile 'org.altbeacon:android-beacon-library:2+'
 

public class BeaconReferenceApplication extends Application implements BootstrapNotifier {
    private static final String TAG = "BeaconReferenceApp";
    private RegionBootstrap regionBootstrap;
    private BackgroundPowerSaver backgroundPowerSaver;
    private boolean haveDetectedBeaconsSinceBoot = false;
    private MonitoringActivity monitoringActivity = null;


    public void onCreate() {
        super.onCreate();
        BeaconManager beaconManager = org.altbeacon.beacon.BeaconManager.getInstanceForApplication(this);

        //beaconManager.getBeaconParsers().clear();
        //beaconManager.getBeaconParsers().add(new BeaconParser().
        //        setBeaconLayout("m:2-3=beac,i:4-19,i:20-21,i:22-23,p:24-24,d:25-25"));

        Log.d(TAG, "setting up background monitoring for beacons and power saving");
        // wake up the app when a beacon is seen
        Region region = new Region("backgroundRegion",
                null, null, null);
        /*Region region = new Region("org.altbeacon.beaconreference",
                Identifier.parse("f7826da6-4fa2D-4e98-80242-bc5b71e0893e"), null, null);*/
        regionBootstrap = new RegionBootstrap(this, region);

        // simply constructing this class and holding a reference to it in your custom Application
        // class will automatically cause the BeaconLibrary to save battery whenever the application
        // is not visible.  This reduces bluetooth power usage by about 60%
        backgroundPowerSaver = new BackgroundPowerSaver(this);

        // If you wish to test beacon detection in the Android Emulator, you can use code like this:
        // BeaconManager.setBeaconSimulator(new TimedBeaconSimulator() );
        // ((TimedBeaconSimulator) BeaconManager.getBeaconSimulator()).createTimedSimulatedBeacons();
    }

    @Override
    public void didEnterRegion(Region arg0) {
        // In this example, this class sends a notification to the user whenever a Beacon
        // matching a Region (defined above) are first seen.
        Log.d(TAG, "did enter region.");
        if (!haveDetectedBeaconsSinceBoot) {
            Log.d(TAG, "auto launching MainActivity");

            // The very first time since boot that we detect an beacon, we launch the
            // MainActivity
            Intent intent = new Intent(this, MonitoringActivity.class);
            intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            // Important:  make sure to add android:launchMode="singleInstance" in the manifest
            // to keep multiple copies of this activity from getting created if the user has
            // already manually launched the app.
            this.startActivity(intent);
            haveDetectedBeaconsSinceBoot = true;
        } else {
            if (monitoringActivity != null) {
                // If the Monitoring Activity is visible, we log info about the beacons we have
                // seen on its display
                monitoringActivity.logToDisplay("I see a beacon again" );
            } else {
                // If we have already seen beacons before, but the monitoring activity is not in
                // the foreground, we send a notification to the user on subsequent detections.
                Log.d(TAG, "Sending notification.");
                sendNotification();
            }
        }

    }

    @Override
    public void didExitRegion(Region region) {
        if (monitoringActivity != null) {
            monitoringActivity.logToDisplay("I no longer see a beacon.");
        }
    }

    @Override
    public void didDetermineStateForRegion(int state, Region region) {
        if (monitoringActivity != null) {
            monitoringActivity.logToDisplay("I have just switched from seeing/not seeing beacons: " + state);
        }
    }

    private void sendNotification() {
        NotificationCompat.Builder builder =
                new NotificationCompat.Builder(this)
                        .setContentTitle("Beacon Reference Application")
                        .setContentText("An beacon is nearby.")
                        .setSmallIcon(R.drawable.ic_launcher);

        TaskStackBuilder stackBuilder = TaskStackBuilder.create(this);
        stackBuilder.addNextIntent(new Intent(this, MonitoringActivity.class));
        PendingIntent resultPendingIntent =
                stackBuilder.getPendingIntent(
                        0,
                        PendingIntent.FLAG_UPDATE_CURRENT
                );
        builder.setContentIntent(resultPendingIntent);
        NotificationManager notificationManager =
                (NotificationManager) this.getSystemService(Context.NOTIFICATION_SERVICE);
        notificationManager.notify(1, builder.build());
    }

    public void setMonitoringActivity(MonitoringActivity activity) {
        this.monitoringActivity = activity;
    }

}
 

public class RangingActivity extends Activity implements BeaconConsumer {
    protected static final String TAG = "RangingActivity";
    private BeaconManager beaconManager = BeaconManager.getInstanceForApplication(this);

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_ranging);
        beaconManager.getBeaconParsers().add(new BeaconParser().
                setBeaconLayout("m:0-3=4c000215,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 
    protected void onPause() {
        super.onPause();
        if (beaconManager.isBound(this)) beaconManager.setBackgroundMode(true);
    }

    @Override 
    protected void onResume() {
        super.onResume();
        if (beaconManager.isBound(this)) beaconManager.setBackgroundMode(false);
    }

    @Override
    public void onBeaconServiceConnect() {
        beaconManager.setRangeNotifier(new RangeNotifier() {
           @Override
           public void didRangeBeaconsInRegion(Collection<Beacon> beacons, Region region) {
              if (beacons.size() > 0) {
                 //EditText editText = (EditText)RangingActivity.this.findViewById(R.id.rangingText);
                 Beacon firstBeacon = beacons.iterator().next();
                 logToDisplay("The first beacon " + firstBeacon.toString() + " is about " + firstBeacon.getDistance() + " meters away. "+"Beacon Name : "+firstBeacon.getBluetoothName());

              }
           }

        });

        try {
            beaconManager.startRangingBeaconsInRegion(new Region("myRangingUniqueId", null, null, null));
        } catch (RemoteException e) {   }
    }

    private void logToDisplay(final String line) {
        runOnUiThread(new Runnable() {
            public void run() {
                EditText editText = (EditText)RangingActivity.this.findViewById(R.id.rangingText);
                editText.append(line+"\n");
            }
        });
    }
}