我正在尝试在作为后台服务运行的应用中使用Android Beacon Library。我在服务启动时绑定了beaconManager。我解开onDestroy。然后，我想根据用户操作（on_duty / off_duty）
停止并开始测距上个星期我尝试了几种组合，但我似乎无法在我停止之后正确地重新开始测距。在某些情况下，我从BeaconIntentProcessor获得以下内容：
"but ranging notifier is null, so we're dropping it."
调用停止和开始测距的正确方法是什么？ 我是否应该能够基于（on_duty / off_duty）绑定和取消绑定服务 （我试过这个，但一直没能使它工作）
我的应用程序适用于个人现场使用信标在on_duty上定期检查不同位置，并希望在应用程序中禁用BLE而off_duty以节省电池。当应用程序处于off_duty模式时，我的应用程序仍然维护其他功能的后台服务。
以下是启动顺序。不确定是否存在问题 - 最后它继续循环通过相同的“重新启动扫描”序列。
10-06 23:23:16.348: D/BeaconService(9203): No org.altbeacon.beacon.SimulatedScanData class exists.
10-06 23:23:16.348: I/BeaconService(9203): binding
10-06 23:23:16.408: I/BeaconService(9203): start monitoring received
10-06 23:23:16.408: D/BeaconService(9203): startMonitoring called
10-06 23:23:16.408: D/BeaconService(9203): Currently monitoring 1 regions.
10-06 23:23:16.408: D/BluetoothAdapter(9203): startLeScan(): null
10-06 23:23:16.468: D/BluetoothAdapter(9203): onClientRegistered() - status=0 clientIf=5
10-06 23:23:16.468: D/BeaconService(9203): Waiting to stop scan for another 1100 milliseconds
10-06 23:23:16.468: D/BeaconService(9203): Scan started
10-06 23:23:17.478: D/BeaconService(9203): Waiting to stop scan for another 99 milliseconds
10-06 23:23:17.568: D/BeaconService(9203): Done with scan cycle
10-06 23:23:17.598: D/BluetoothAdapter(9203): stopLeScan()
10-06 23:23:17.608: D/BeaconService(9203): Restarting scan. Unique beacons seen last cycle: 0 Total beacon advertisement packets seen: 0
10-06 23:23:17.608: D/BluetoothAdapter(9203): startLeScan(): null
10-06 23:23:17.618: D/BluetoothAdapter(9203): onClientRegistered() - status=0 clientIf=5
10-06 23:23:17.618: D/BeaconService(9203): Waiting to stop scan for another 5000 milliseconds
10-06 23:23:17.618: D/BeaconService(9203): Scan started
10-06 23:23:18.618: D/BeaconService(9203): Waiting to stop scan for another 3999 milliseconds
10-06 23:23:18.978: D/BluetoothAdapter(9203): onScanResult() - Device=78:A5:04:5B:1A:F9 RSSI=-48
10-06 23:23:18.978: D/BeaconService(9203): got record
10-06 23:23:19.618: D/BeaconService(9203): Waiting to stop scan for another 2998 milliseconds
10-06 23:23:19.878: D/BluetoothAdapter(9203): onScanResult() - Device=78:A5:04:5B:1A:F9 RSSI=-48
10-06 23:23:19.878: D/BeaconService(9203): got record
10-06 23:23:20.618: D/BeaconService(9203): Waiting to stop scan for another 1998 milliseconds
10-06 23:23:20.788: D/BluetoothAdapter(9203): onScanResult() - Device=78:A5:04:5B:1A:F9 RSSI=-48
10-06 23:23:20.788: D/BeaconService(9203): got record
10-06 23:23:21.618: D/BeaconService(9203): Waiting to stop scan for another 997 milliseconds
10-06 23:23:21.698: D/BluetoothAdapter(9203): onScanResult() - Device=78:A5:04:5B:1A:F9 RSSI=-48
10-06 23:23:21.698: D/BeaconService(9203): got record
10-06 23:23:22.608: D/BluetoothAdapter(9203): onScanResult() - Device=78:A5:04:5B:1A:F9 RSSI=-48
10-06 23:23:22.608: D/BeaconService(9203): got record
10-06 23:23:22.618: D/BeaconService(9203): Done with scan cycle
10-06 23:23:22.618: D/BluetoothAdapter(9203): stopLeScan()
10-06 23:23:22.628: D/BeaconService(9203): Restarting scan. Unique beacons seen last cycle: 0 Total beacon advertisement packets seen: 0
10-06 23:23:22.638: D/BluetoothAdapter(9203): startLeScan(): null
10-06 23:23:22.638: D/BluetoothAdapter(9203): onClientRegistered() - status=0 clientIf=5
10-06 23:23:22.648: D/BeaconService(9203): Waiting to stop scan for another 5000 milliseconds
10-06 23:23:22.648: D/BeaconService(9203): Scan started
10-06 23:23:23.658: D/BeaconService(9203): Waiting to stop scan for another 3993 milliseconds
10-06 23:23:24.418: D/BluetoothAdapter(9203): onScanResult() - Device=78:A5:04:5B:1A:F9 RSSI=-46
10-06 23:23:24.418: D/BeaconService(9203): got record
10-06 23:23:24.658: D/BeaconService(9203): Waiting to stop scan for another 2993 milliseconds
10-06 23:23:25.328: D/BluetoothAdapter(9203): onScanResult() - Device=78:A5:04:5B:1A:F9 RSSI=-47
10-06 23:23:25.328: D/BeaconService(9203): got record
10-06 23:23:25.658: D/BeaconService(9203): Waiting to stop scan for another 1992 milliseconds
10-06 23:23:26.228: D/BluetoothAdapter(9203): onScanResult() - Device=78:A5:04:5B:1A:F9 RSSI=-46
10-06 23:23:26.228: D/BeaconService(9203): got record
10-06 23:23:26.658: D/BeaconService(9203): Waiting to stop scan for another 991 milliseconds
10-06 23:23:27.648: D/BeaconService(9203): Done with scan cycle
10-06 23:23:27.648: D/BluetoothAdapter(9203): stopLeScan()
10-06 23:23:27.658: D/BeaconService(9203): Restarting scan. Unique beacons seen last cycle: 0 Total beacon advertisement packets seen: 0
10-06 23:23:27.658: D/BluetoothAdapter(9203): startLeScan(): null
10-06 23:23:27.668: D/BluetoothAdapter(9203): onClientRegistered() - status=0 clientIf=5
10-06 23:23:27.678: D/BeaconService(9203): Waiting to stop scan for another 5000 milliseconds
10-06 23:23:27.678: D/BeaconService(9203): Scan started
10-06 23:23:28.678: D/BeaconService(9203): Waiting to stop scan for another 3999 milliseconds
-------------简单服务代码-------------
public class SimpleService extends Service implements BeaconConsumer
{
protected static final String TAG = "MyBeaconService";
private BeaconManager beaconManager;
RangingData rangingData = null;
Beacon beacon = null;
int mapKey = 0;
ArrayList<String> sBeacons = new ArrayList<String>();
Hashtable<Integer, String> source = new Hashtable<Integer,String>();
final HashMap<Integer, String> map = new HashMap(source);
final HashMap<Integer, String> maptime = new HashMap(source);
String[] parts = null;
public class SimpleServiceBinder extends Binder
{
public SimpleService getService()
{
return SimpleService.this;
}
}
@Override
public IBinder onBind(Intent arg0)
{
// TODO Auto-generated method stub
return null;
}
@Override
public void onCreate()
{
super.onCreate();
Log.i(TAG, "Service created ...");
beaconManager = BeaconManager.getInstanceForApplication(getBaseContext());
// beaconManager = org.altbeacon.beacon.BeaconManager.getInstanceForApplication(this);
// By default the AndroidBeaconLibrary will only find AltBeacons. If you wish to make it
// find a different type of beacon, you must specify the byte layout for that beacon's
// advertisement with a line like below. The example shows how to find a beacon with the
// same byte layout as AltBeacon but with a beaconTypeCode of 0xaabb
//
// beaconManager.getBeaconParsers().add(new BeaconParser().
// setBeaconLayout("m:2-3=aabb,i:4-19,i:20-21,i:22-23,p:24-24,d:25-25"));
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);
beaconManager.debug = true;
beaconManager.setForegroundBetweenScanPeriod(1000);
}
@Override
public void onStart(Intent intent, int startId)
{
Log.i(TAG,"onStart called");
beaconManager.setBackgroundMode(false);
}
@Override
public int onStartCommand(Intent intent, int flags, int startId)
{
Log.i(TAG,"onStartCommand called");
return START_STICKY; //START_REDELIVER_INTENT;
}
@Override
public void onDestroy()
{
super.onDestroy();
Log.i(TAG, "Service destroyed ...");
//Toast.makeText(this, "Service destroyed ...", Toast.LENGTH_LONG).show();
beaconManager.unbind(this);
}
@Override
public void onBeaconServiceConnect()
{
Log.i(TAG, "<<< onBeaconServiceConnect >>>");
beaconManager.setMonitorNotifier(new MonitorNotifier()
{
@Override
public void didEnterRegion(Region region)
{
Log.i(TAG, "onBeaconServiceConnect \ngetId1: "+region.getId1()+"\ngetId2: "+region.getId2()+"\ngetId3: "+region.getId3());
Log.i(TAG, "**************-------------****************");
logBeaconData(true);
}
@Override
public void didExitRegion(Region region)
{
//logToDisplay("Exit Region "+ region.getUniqueId(), true);
Log.i(TAG, "********!!!!!!!!! didExitRegion !!!!!!!!!!*******");
mapKey = 0;
logBeaconData(false);
try
{
beaconManager.stopRangingBeaconsInRegion(new Region("sBeacon", null, null, null));
} catch (RemoteException e) { e.printStackTrace();}
Iterator<Integer> keySetIterator = map.keySet().iterator();
while(keySetIterator.hasNext())
{
Integer key = keySetIterator.next();
Log.i(TAG, "****DELETE key: " + mapKey + " value: " + map.get(key));
keySetIterator.remove();
maptime.remove(key);
}
printtoscreen();
}
@Override
public void didDetermineStateForRegion(int state, Region region)
{
Log.i(TAG, "didDetermineStateForRegion \ngetId1: "+region.getId1()+"\ngetId2: "+region.getId2()+"\ngetId3: "+region.getId3());
}
});
try {
beaconManager.startMonitoringBeaconsInRegion(new Region("sBeacon", null, null, null));
} catch (RemoteException e) { Log.i(TAG, "RemoteException: "+e); }
}
/**
*
* @param iBeacon
*/
private void logBeaconData(final boolean enter)
{
beaconManager.setRangeNotifier(new RangeNotifier()
{
@Override
public void didRangeBeaconsInRegion(Collection<Beacon> beacons, Region region)
{
if (beacons.size() > 0)
{
// sBeacons.clear();
beacon = beacons.iterator().next();
Log.i(TAG, " UUID: " + beacon.getId1());
Log.i(TAG, " Major: " + beacon.getId2());
Log.i(TAG, " Minor: " + beacon.getId3());
Log.i(TAG, " RSSI: " + beacon.getRssi());
Log.i(TAG, " Power: "+ beacon.getTxPower());
Log.i(TAG, " Distance: "+ beacon.getDistance());
if (map.values().contains(beacon.getIdentifiers().toString()))
{
// Log.i(TAG, "<<< Already there >>> "+beacon.getIdentifiers().toString());
}
else
{
mapKey = mapKey + 1;
map.put(mapKey, beacon.getIdentifiers().toString());
maptime.put(mapKey, ""+System.currentTimeMillis());
}
Iterator<Integer> keySetIterator = map.keySet().iterator();
final int seconds = 10;
while(keySetIterator.hasNext())
{
Integer key = keySetIterator.next();
if (map.get(key).contains(beacon.getIdentifiers().toString()))
{
maptime.put(key, ""+System.currentTimeMillis());
}
long diff = System.currentTimeMillis() - (Long.parseLong(maptime.get(key)));
int second = (int) ((diff / 1000) % 60);
Log.i(TAG, "key: " + key + " value: " + map.get(key)+" diff: "+second);
if(second >= seconds )
{
Log.i(TAG, "****DELETE key: " + mapKey + " value: " + map.get(key)+" diff: "+second);
keySetIterator.remove();
maptime.remove(key);
//logToDisplay("\n** Beacon not longer reporting **"+ map.get(key), true);
}
printtoscreen();
}
}
}
});
try
{
beaconManager.startRangingBeaconsInRegion(new Region("sBeacon", null, null, null));
Log.i(TAG, "*** startRangingBeaconsInRegion ***");
} catch (RemoteException e) { Log.i(TAG, "RemoteException: "+e); }
}
public void printtoscreen()
{
Iterator<Integer> keySetIterator = map.keySet().iterator();
// logToDisplay("", false);
while(keySetIterator.hasNext())
{
Integer key = keySetIterator.next();
Log.i(TAG, "---------------------------------------------------");
if (map.get(key) != null)
{
parts = map.get(key).toString().substring(1, map.get(key).toString().length()-1).split("\\,");
Log.i(TAG, "---------------------------------------------------");
Log.i(TAG, "UUID: " + parts[0]);
Log.i(TAG, "Major: " + parts[1]);
Log.i(TAG, "Minor: " + parts[2]);
Log.i(TAG, "RSSI: "+ beacon.getRssi());
Log.i(TAG, "Power: "+ beacon.getTxPower());
Log.i(TAG, "Distance: "+ beacon.getDistance());
}
}
}
}
答案 0 :(得分：0)
如果正确设置，应该没有问题。
我怀疑你得到了＆＃34;测距通知器是空的＆＃34;因为您没有在onBeaconServiceConnect（）回调中设置范围通知程序。如果您在此方法中设置了测距通知程序，则可能需要发布代码，以便我们进一步提供帮助。