我最近开始测试Estimote Beacons，我尝试在进入信标区域时尝试从后台服务发出通知，但不幸的是我的解决方案无法正常工作。它没有给出错误但是在发现信标时没有启动通知。我不知道这是代码错误还是仅仅是做错的方式。我已经阅读this其他问题，但它似乎有点不同，因为我使用的是服务而不是活动，但也许答案类似（与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();
}
}
我将非常感谢任何帮助，提前谢谢！
答案 0 :(得分：8)
这段代码对我有用。确保放置正确的UUID，次要和主要号码。
//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));
}
答案 1 :(得分：0)
检查这个，我希望这会对你有所帮助。您可以通过此功能Utils.computeProximity(nearestBeacon)找到附近区域。
beaconManager.setRangingListener(new BeaconManager.RangingListener() {
@Override
public void onBeaconsDiscovered(Region region, final List<Beacon> beaconList) {
if (!beaconList.isEmpty()) {
Beacon nearestBeacon = beaconList.get(0);
Log.e("Current Proximity - ", String.valueOf(Utils.computeProximity(nearestBeacon)));
}
}
});
答案 2 :(得分：0)