蓝牙GATT - onServicesDiscovered（GATT BluetoothGatt，诠释状态）不包含所有服务 [英] Bluetooth GATT - onServicesDiscovered(BluetoothGatt gatt, int status) does not contain all Services

问题描述

我有code连接到，然后试图发现由定制BLE服务器设备的广告定制服务提供的所有服务。

I have code that connects to, and then tries to discover all Services provided by a custom BLE server device advertising custom Services.

在code 工作在

• 的Nexus 5采用Android 5.1


• 三星SM-T320采用Android 4.4.2


• 中兴刀片VEC的4G的Andr​​oid 4.4.2

code 不起作用在

• 三星SM-T360采用Android 4.4.4


• 三星GT-I9195采用Android 4.4.2

在设备的地方失败，往往发现所有的BLE服务在一（二）设备的通告相同BLE服务。重新启动Android设备和/或带有WiFi摆弄/ BT使得它发现其他BLE设备上的所有服务，但随后不是第一次（！）。

On devices where it fails it often discovers all of the BLE Services on one (of two) devices that advertises the same BLE Services. Restarting the Android device and/or fiddling with wifi/bt makes it discover all the Services on the other BLE device but then not the first (!).

与有关BLE服务发现三星的设备上优秀的bug任何人都知道？

Anyone knows of a outstanding bug with the Samsung devices regarding BLE Service discovery?

拥有所有的服务：

04-16 13:28:00.999: V/ScanningState(9741): onServicesDiscovered()
04-16 13:28:00.999: I/ScanningState(9741): The device has service 00001800-0000-1000-8000-00805f9b34fb
04-16 13:28:00.999: I/ScanningState(9741): The device has service 0000180a-0000-1000-8000-00805f9b34fb
04-16 13:28:00.999: I/ScanningState(9741): The device has service 0000180f-0000-1000-8000-00805f9b34fb
04-16 13:28:00.999: I/ScanningState(9741): The device has service f0ba0000-c6b5-11e2-8b8b-0800200c9a66
04-16 13:28:00.999: I/ScanningState(9741): The device has service f0ba0100-c6b5-11e2-8b8b-0800200c9a66
04-16 13:28:00.999: I/ScanningState(9741): The device has service f0ba1100-c6b5-11e2-8b8b-0800200c9a66

缺少服务：

04-16 14:05:31.179: V/ScanningState(10710): onServicesDiscovered()
04-16 14:05:31.179: I/ScanningState(10710): The device has service 00001800-0000-1000-8000-00805f9b34fb
04-16 14:05:31.179: I/ScanningState(10710): The device has service 0000180a-0000-1000-8000-00805f9b34fb
04-16 14:05:31.179: I/ScanningState(10710): The device has service 0000180f-0000-1000-8000-00805f9b34fb
04-16 14:05:31.179: I/ScanningState(10710): The device has service f0ba0000-c6b5-11e2-8b8b-0800200c9a66
04-16 14:05:31.179: W/ScanningState(10710): Device is missing sensor service
04-16 14:05:31.179: W/ScanningState(10710): Device is missing storage service
04-16 14:05:31.179: I/ScanningState(10710): Candidate did not support required services

对于第二个（不及格）扫描我还可以看到以下日志：

For the second (failing) scan I also see the following logs:

04-16 14:24:26.310: D/BtGatt.GattService(2856): onGetCharacteristic() - address=00:07:80:13:14:33, status=133, charUuid=00000000-0000-0000-0000-000000000000, prop=0
04-16 14:24:26.310: D/BtGatt.btif(2856): btif_gattc_get_included_service
04-16 14:24:26.310: D/BtGatt.btif(2856): btgattc_handle_event: Event 1011
04-16 14:24:26.310: E/bt-btif(2856): No server cache available
04-16 14:24:26.310: E/BtGatt.btif(2856): bta_to_btif_uuid: Unknown UUID length 25104!

更新：

进一步的调查表明，onServicesDiscovered（GATT BluetoothGatt，诠释状态）返回所有BLE服务如果只有一个BLE服务设备是present一次。某种资源泄漏的较低层？

Further investigation shows that the onServicesDiscovered(BluetoothGatt gatt, int status) returns all the BLE Services if only one BLE service device is present at a time. Some kind of resource leak in the lower layers?

推荐答案

确定这样简单的答案是不要叫 connectGatt（上下文的背景下，布尔自动连接，BluetoothGattCallback回调）其他任何线程，但主线程。

Ok so the short answer is do not call connectGatt(Context context, boolean autoConnect, BluetoothGattCallback callback) on any other thread but the main thread.

如果我得到了一个 onLeScan（BluetoothDevice类设备，诠释RSSI，字节[] scanRecord）在连接到设备I缓存的参考和后来被称为 connectGatt（）回调 onConnectionStateChange（GATT BluetoothGatt，诠释状态，INT newState）从第一设备断开连接后里面。这导致了在这个问题上描述的问题。

If I got a onLeScan(BluetoothDevice device, int rssi, byte[] scanRecord) while connecting to a device I cached the reference and later called connectGatt() inside the callback onConnectionStateChange(BluetoothGatt gatt, int status, int newState) after a disconnect from the first device. This caused the issue described in this question.

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