我正在使用Android IBeacon Library并尝试获取该区域中的iBeacons数量。
使用测距API,我可以得到设备数量。即使所有iBeacons和我的手机都静止不动,该计数仍从0变为n。另外,当我尝试获取设备的详细信息时,也会收到以下异常。是什么导致异常。当我尝试调试时,我看到数据不为空。

04-14 11:26:37.203  11754-11883/com.test.ibeacon E/AndroidRuntime﹕ FATAL EXCEPTION: IntentService[IBeaconIntentProcessor]
Process: com.test.ibeacon, PID: 11754
java.util.NoSuchElementException
        at java.util.ArrayList$ArrayListIterator.next(ArrayList.java:576)
        at com.test.ibeacon.MainActivity$1.didRangeBeaconsInRegion(MainActivity.java:115)
        at com.radiusnetworks.ibeacon.IBeaconIntentProcessor.onHandleIntent(IBeaconIntentProcessor.java:73)
        at android.app.IntentService$ServiceHandler.handleMessage(IntentService.java:65)
        at android.os.Handler.dispatchMessage(Handler.java:102)
        at android.os.Looper.loop(Looper.java:136)
        at android.os.HandlerThread.run(HandlerThread.java:61)


我的代码:

iBeaconManager.setRangeNotifier(new RangeNotifier() {
        @Override
        public void didRangeBeaconsInRegion(Collection<IBeacon> iBeacons, Region region) {
            Log.d(LOG_TAG,"No of devices == "+iBeacons.size());
            if (iBeacons.size() > 0) {
                Log.i(LOG_TAG, "The first iBeacon I see is about "+iBeacons.iterator().next().getAccuracy()+" meters away.");
            }
            Iterator<IBeacon> iterator = iBeacons.iterator();
            while (iterator.hasNext()) {
                Log.d(LOG_TAG,"Major = "+(iterator.next()).getMajor()+" Minor = "+(iterator.next()).getMinor());
            }
        }
    });

    try {
        iBeaconManager.startRangingBeaconsInRegion(new Region("myUniqueId", null, null, null)); //I'm specifying the UniqueId.
    } catch (RemoteException e) {   }

最佳答案

开始测距时,您是否提供iBeacon的接近性UUID?
我的代码如下所示:

String proximityUUID = "xxxxxx";
iBeaconManager.startRangingBeaconsInRegion(new Region("myRangingUniqueId", proximityUUID, null, null));


然后在didRangeBeaconsInRegionenter中:

if (iBeacons.size() > 0) {
    for (IBeacon iBeacon : iBeacons) {
        logToDisplay(String.format("( %.2f m ) %d", iBeacon.getAccuracy(), iBeacon.getProximity()));
    }
}


在这里,您应该获得每个看到的iBeacon的准确性和接近性。

10-07 19:21