android - 扫描 AltBeacon 库中的信标时出现错误 "Scan failed, app cannot be registered"

Question

在 Android 设备上测距信标时，一段时间后(大约 3-5 分钟)会发生错误。在此之后，测距不再看到信标。它仅有助于重新启动蓝牙。重新启动后测距开始正常工作，检测到信标，但过了一会儿，再次出现故障。据我了解，客户端连接溢出。我学习了logcat并确定了以下错误:

GATT_Register: can not Register GATT client, MAX client reached! CycledLeScannerForLollipop Scan failed:app cannot be registered BluetoothLeScanner onClientRegistered () - status = 133 clientIf = 0 mClientIf = 0

我在多大程度上理解 status 应该是 0。我再次指出，这项工作的特点是一种服务，它在与应用程序本身不同的进程中运行。当服务停止看到信标时，来自带有 BluetoothLeScanner 过滤器的 logcat 的字符串:

    Debug   12591   BluetoothLeScanner  onClientRegistered() - status=133 clientIf=0 mClientIf=0
Debug   12591   BluetoothLeScanner  onClientRegistered() - status=133 clientIf=0 mClientIf=0
Debug   12591   BluetoothLeScanner  onClientRegistered() - status=133 clientIf=0 mClientIf=0
Debug   12591   BluetoothLeScanner  onClientRegistered() - status=133 clientIf=0 mClientIf=0
Debug   12591   BluetoothLeScanner  onClientRegistered() - status=0 clientIf=32 mClientIf=0
Debug   12591   BluetoothLeScanner  onClientRegistered() - status=0 clientIf=32 mClientIf=0
Debug   12591   BluetoothLeScanner  onClientRegistered() - status=0 clientIf=31 mClientIf=0
Debug   12591   BluetoothLeScanner  onClientRegistered() - status=0 clientIf=30 mClientIf=0
Debug   12591   BluetoothLeScanner  onClientRegistered() - status=0 clientIf=29 mClientIf=0
Debug   12591   BluetoothLeScanner  onClientRegistered() - status=0 clientIf=28 mClientIf=0

有可能解决给定的问题吗？谢谢!

编辑:这是 logcat:

  Time           Device Name  Type     PID           Tag          Message
02-19 18:49:45.395  AGM A8  Debug   13351   BluetoothLeScanner  onClientRegistered() - status=133 clientIf=0 mClientIf=0
02-19 18:49:40.375  AGM A8  Debug   13351   BluetoothLeScanner  onClientRegistered() - status=0 clientIf=32 mClientIf=0
02-19 18:49:35.333  AGM A8  Debug   13351   BluetoothLeScanner  onClientRegistered() - status=0 clientIf=31 mClientIf=0
02-19 18:49:30.411  AGM A8  Debug   13351   BluetoothLeScanner  onClientRegistered() - status=0 clientIf=30 mClientIf=0
02-19 18:49:25.256  AGM A8  Debug   13351   BluetoothLeScanner  onClientRegistered() - status=0 clientIf=29 mClientIf=0
02-19 18:49:20.234  AGM A8  Debug   13351   BluetoothLeScanner  onClientRegistered() - status=0 clientIf=28 mClientIf=0
02-19 18:49:15.185  AGM A8  Debug   13351   BluetoothLeScanner  onClientRegistered() - status=0 clientIf=27 mClientIf=0
02-19 18:49:10.181  AGM A8  Debug   13351   BluetoothLeScanner  onClientRegistered() - status=0 clientIf=5 mClientIf=0
02-19 18:49:05.170  AGM A8  Debug   13351   BluetoothLeScanner  onClientRegistered() - status=0 clientIf=26 mClientIf=0
02-19 18:49:00.124  AGM A8  Debug   13351   BluetoothLeScanner  onClientRegistered() - status=0 clientIf=26 mClientIf=0
02-19 18:48:55.108  AGM A8  Debug   13351   BluetoothLeScanner  onClientRegistered() - status=0 clientIf=25 mClientIf=0
02-19 18:48:50.078  AGM A8  Debug   13351   BluetoothLeScanner  onClientRegistered() - status=0 clientIf=25 mClientIf=0
02-19 18:48:45.028  AGM A8  Debug   13351   BluetoothLeScanner  onClientRegistered() - status=0 clientIf=23 mClientIf=0
02-19 18:48:39.992  AGM A8  Debug   13351   BluetoothLeScanner  onClientRegistered() - status=0 clientIf=24 mClientIf=0
02-19 18:48:39.316  AGM A8  Debug   3254    BluetoothLeScanner  onClientRegistered() - status=0 clientIf=23 mClientIf=0
02-19 18:48:34.994  AGM A8  Debug   13351   BluetoothLeScanner  onClientRegistered() - status=0 clientIf=22 mClientIf=0
02-19 18:48:29.927  AGM A8  Debug   13351   BluetoothLeScanner  onClientRegistered() - status=0 clientIf=21 mClientIf=0
02-19 18:48:24.905  AGM A8  Debug   13351   BluetoothLeScanner  onClientRegistered() - status=0 clientIf=20 mClientIf=0
02-19 18:48:19.866  AGM A8  Debug   13351   BluetoothLeScanner  onClientRegistered() - status=0 clientIf=19 mClientIf=0
02-19 18:48:14.852  AGM A8  Debug   13351   BluetoothLeScanner  onClientRegistered() - status=0 clientIf=18 mClientIf=0
02-19 18:48:09.825  AGM A8  Debug   13351   BluetoothLeScanner  onClientRegistered() - status=0 clientIf=17 mClientIf=0
02-19 18:48:04.812  AGM A8  Debug   13351   BluetoothLeScanner  onClientRegistered() - status=0 clientIf=16 mClientIf=0
02-19 18:47:59.768  AGM A8  Debug   13351   BluetoothLeScanner  onClientRegistered() - status=0 clientIf=15 mClientIf=0
02-19 18:47:54.751  AGM A8  Debug   13351   BluetoothLeScanner  onClientRegistered() - status=0 clientIf=14 mClientIf=0
02-19 18:47:49.708  AGM A8  Debug   13351   BluetoothLeScanner  onClientRegistered() - status=0 clientIf=13 mClientIf=0
02-19 18:47:44.688  AGM A8  Debug   13351   BluetoothLeScanner  onClientRegistered() - status=0 clientIf=12 mClientIf=0
02-19 18:47:39.676  AGM A8  Debug   13351   BluetoothLeScanner  onClientRegistered() - status=0 clientIf=11 mClientIf=0
02-19 18:47:34.662  AGM A8  Debug   13351   BluetoothLeScanner  onClientRegistered() - status=0 clientIf=10 mClientIf=0
02-19 18:47:29.603  AGM A8  Debug   13351   BluetoothLeScanner  onClientRegistered() - status=0 clientIf=9 mClientIf=0
02-19 18:47:24.585  AGM A8  Debug   13351   BluetoothLeScanner  onClientRegistered() - status=0 clientIf=8 mClientIf=0
02-19 18:47:19.552  AGM A8  Debug   13351   BluetoothLeScanner  onClientRegistered() - status=0 clientIf=7 mClientIf=0
02-19 18:47:14.525  AGM A8  Debug   13351   BluetoothLeScanner  onClientRegistered() - status=0 clientIf=7 mClientIf=0

Answer 1

在某些 Android 设备型号上，蓝牙堆栈可能会进入不良状态，需要重新启动才能再次扫描蓝牙设备。为了自动修复此问题，BluetoothMedic已添加到 Android Beacon 库中，它会在检测到问题时自动重启蓝牙。在撰写本文时，此更改仍处于拉取请求中，因此尚未合并到库的发布版本中。

虽然这是解决您的问题的方法，但核心问题可能是您的手机上安装了太多蓝牙扫描应用程序。 Android 将同时使用蓝牙客户端的应用程序数量限制为 32 个。如果您安装的应用程序数量超过此数量并尝试使用蓝牙 LE API，您将收到此错误，并且只有蓝牙的电源循环(可能是自动的)通过上面的 BluetoothMedic)可以从问题中恢复。这将有效地终止在其他应用程序上使用蓝牙 API，以便您的应用程序有机会使用它们。