private void sendBeaconChangeMessage(Beacon beacon) {
String uuid = beacon.getId1().toString();
// Payload
SaneJSONObject payload = new SaneJSONObject();
payload.putOrIgnore("platform", "android");
payload.putDoubleOrIgnore("version", VERSION);
// Beacon
SaneJSONObject beaconJSON = new SaneJSONObject();
beaconJSON.putOrIgnore("uuid", uuid);
payload.putJSONOrIgnore("beacon", beaconJSON);
// Proximity
payload.putJSONOrIgnore("proximity", getProximity(beacon));
// Message
SaneJSONObject message = new SaneJSONObject();
JSONArray devices = new JSONArray();
devices.put("*");
message.putArrayOrIgnore("devices", devices);
message.putJSONOrIgnore("payload", payload);
message.putOrIgnore("topic", "location_update");
// Send
BeaconInfo beaconInfo = getBeaconInfo(this.beaconInfo, uuid);
Double distance = beacon.getDistance();
if (beaconInfo.hasChangedDistance(distance)) {
meshblu.message(message);
emitter.emit(EVENTS.LOCATION_UPDATE, payload, beaconInfo);
}
beaconInfo.setLastDistance(distance);
}
/**
* 每个扫描周期结束，根据20秒内各beacon的RSSI平均值计算它的距离，该回调获取这些beacon的距离值 Called once per second (实际上是每扫描周期)
* to give an estimate of the mDistance to visible beacons
*/
@Override
public void didRangeBeaconsInRegion(Collection<Beacon> beacons, Region region) {
LogManager.d(TAG, "didRangeBeaconsInRegion(),beacons=" + beacons.size());
for (Beacon beacon : beacons) {
LogManager.d(TAG, beacon.getId2() + ":" + beacon.getId3() + "," + beacon.getDistance());
}
Beacon beacon = mNearestBeacon.getNearestBeacon(mGetBeaconType, beacons);
mOnNearestBeaconListener.getNearestBeacon(mGetBeaconType, beacon);
}
public void didRangeBeaconsInRegion(Collection<Beacon> beacons, Region region) {
if (beacons.size() > 0) {
EditText editText = (EditText) RangingActivity.this.findViewById(R.id.rangingText);
for (Beacon beacon : beacons) {
logToDisplay(
"Beacon "
+ beacon.toString()
+ " is about "
+ beacon.getDistance()
+ " meters away, with Rssi: "
+ beacon.getRssi());
}
}
}
private void beaconRangeChange(Collection<Beacon> beacons, Region region) {
for (Beacon beacon : beacons) {
String uuid = beacon.getId1().toString();
DecimalFormat df = new DecimalFormat("#.000");
String distance = df.format(beacon.getDistance());
Log.d(TAG, "Beacon (" + uuid.substring(0, 8) + ") is about " + distance + " meters away.");
Boolean enabled = isBeaconEnabled(uuid);
if (enabled != null) {
if (enabled) {
sendBeaconChangeMessage(beacon);
}
} else {
emitter.emit(EVENTS.DISCOVERED_BEACON, beacon);
}
}
}
private SaneJSONObject getProximity(Beacon beacon) {
Double distance = beacon.getDistance();
String proximity = "Unknown";
Integer code = 0;
if (distance < 2) {
code = 1;
proximity = "Immediate";
} else if (distance >= 2 && distance < 5) {
code = 2;
proximity = "Near";
} else if (distance >= 5) {
code = 3;
proximity = "Far";
}
SaneJSONObject proximityJSON = new SaneJSONObject();
proximityJSON.putOrIgnore("message", proximity);
proximityJSON.putIntOrIgnore("code", code);
proximityJSON.putDoubleOrIgnore("distance", distance);
proximityJSON.putIntOrIgnore("rssi", beacon.getRssi());
Long time = new Date().getTime();
proximityJSON.putOrIgnore("timestamp", new Timestamp(time).toString());
return proximityJSON;
}