AltBeacon didEnterRegion（）/didexitregion与Pibeacon不能正常工作。方法被随机调用

Question

我希望我的android应用程序执行一些代码，当它进入特定信标的指定范围（RaspberryPi与蓝牙加密狗）。

这是我在RPi上使用的开始发出的命令：

sudo hcitool -i hci0 cmd 0x08 0x0008 1E 02 01 1A 1A FF 4C 00 02 15 E2 0A 39
     F4 73 F5 4B C4 A1 2F 17 D1 AD 07 A9 61 00 00 00 00 C8 00

我已经编辑了BeaconLayout来检测iBeacons：

beaconManager.getBeaconParsers().add(new BeaconParser().
            setBeaconLayout("m:2-3=0215,i:4-19,i:20-21,i:22-23,p:24-24"));

Region region1 = new Region("RaspberryPi", Identifier.parse("E20A39F4-73F5-4BC4-A12F-17D1AD07A961"), null, null);

beaconManager.setMonitorNotifier(new MonitorNotifier() {
        @Override
        public void didEnterRegion(Region region) {
            Log.i(TAG, "I just saw a beacon for the first time!");
        }

        @Override
        public void didExitRegion(Region region) {
            Log.i(TAG, "I no longer see a beacon");
        }

        @Override
        public void didDetermineStateForRegion(int state, Region region) {
            Log.i(TAG, "I have just switched from seeing/not seeing beacons: "+ state);
        }
    });

try {
    beaconManager.startMonitoringBeaconsInRegion(region1);
} catch (RemoteException e) {      }

05-19 23:18:52.487 31204-31220/com.daniellazarov.tempapp D/BluetoothLeScanner: onClientRegistered() - status=0 clientIf=5
05-19 23:18:53.952 31204-31220/com.daniellazarov.tempapp D/BluetoothLeScanner: onClientRegistered() - status=0 clientIf=5
05-19 23:18:55.195 31204-31220/com.daniellazarov.tempapp D/BluetoothLeScanner: onClientRegistered() - status=0 clientIf=5
05-19 23:18:56.570 31204-31220/com.daniellazarov.tempapp D/BluetoothLeScanner: onClientRegistered() - status=0 clientIf=5
05-19 23:18:57.742 31204-31219/com.daniellazarov.tempapp D/BluetoothLeScanner: onClientRegistered() - status=0 clientIf=5
05-19 23:18:57.782 31204-32016/com.daniellazarov.tempapp I/MonitoringActivity: I have just switched from seeing/not seeing beacons: 0
05-19 23:18:57.782 31204-32016/com.daniellazarov.tempapp I/MonitoringActivity: I no longer see a beacon
05-19 23:18:57.790 31204-32016/com.daniellazarov.tempapp I/MonitoringActivity: I have just switched from seeing/not seeing beacons: 0
05-19 23:18:57.790 31204-32016/com.daniellazarov.tempapp I/MonitoringActivity: I no longer see a beacon
05-19 23:18:57.790 31204-32016/com.daniellazarov.tempapp I/MonitoringActivity: I have just switched from seeing/not seeing beacons: 0
05-19 23:18:57.790 31204-32016/com.daniellazarov.tempapp I/MonitoringActivity: I no longer see a beacon
05-19 23:18:58.933 31204-31219/com.daniellazarov.tempapp D/BluetoothLeScanner: onClientRegistered() - status=0 clientIf=5
05-19 23:19:00.098 31204-31220/com.daniellazarov.tempapp D/BluetoothLeScanner: onClientRegistered() - status=0 clientIf=5
05-19 23:19:01.287 31204-31220/com.daniellazarov.tempapp D/BluetoothLeScanner: onClientRegistered() - status=0 clientIf=5
05-19 23:19:01.537 31204-32140/com.daniellazarov.tempapp I/MonitoringActivity: I have just switched from seeing/not seeing beacons: 1
05-19 23:19:01.537 31204-32140/com.daniellazarov.tempapp I/MonitoringActivity: I just saw a beacon for the first time!
05-19 23:19:01.538 31204-32140/com.daniellazarov.tempapp I/MonitoringActivity: I have just switched from seeing/not seeing beacons: 1
05-19 23:19:01.538 31204-32140/com.daniellazarov.tempapp I/MonitoringActivity: I just saw a beacon for the first time!
05-19 23:19:01.539 31204-32140/com.daniellazarov.tempapp I/MonitoringActivity: I have just switched from seeing/not seeing beacons: 1
05-19 23:19:01.539 31204-32140/com.daniellazarov.tempapp I/MonitoringActivity: I just saw a beacon for the first time!
05-19 23:19:02.629 31204-31219/com.daniellazarov.tempapp D/BluetoothLeScanner: onClientRegistered() - status=0 clientIf=5

我假设这与覆盆子PI的传输速率有关，但我无法将其改变为有效的。

Answer 1

干得好！一切似乎都在起作用。（只有一个奇怪的例外，即每个不同的日志html" target="_blank">消息都有三行日志--不确定为什么会发生这种情况。）

日志显示，您在信标检测中有一个退出，这导致了在05-19 23:18:57.782的退出事件，然后在05-19 23:19:01.537的另一个进入事件。虽然这段时间看起来很短（大约4秒），但辍学肯定比这段时间长得多。默认情况下，Android Beacon库不会发送区域退出事件，直到10秒内没有看到匹配区域定义的Beacon。这意味着有14秒的时间，您的Android设备没有看到来自覆盆子PI的传输。

Android设备不能接收到来自信标的某些传输是正常的。在近距离范围内，可能有80%的数据包被正确接收，其余的数据包由于无线电噪声、冲突、信道问题或其他低水平的蓝牙因素而丢失。如果你真的运气不好，你可能会连续错过几次传输。但是连续错过两三次以上的传输应该是极其罕见的。

>

您的Raspberry Pi广告不是很频繁（可能每5秒才广告一次，如果您连续错过两个数据包，这将导致区域退出）。

您的Android设备丢失了很多数据包。这有时可能是由WiFi/蓝牙干扰导致的，这些设备存在已知的干扰问题，如Nexus 7、Nexus 4、Moto G和Moto X。

要找出它是哪一个，请尝试以下步骤：