Question

我的应用程序在运行Android 4.3的三星S3上运行良好但是我在运行4.4.4的Moto G上遇到问题

我的BLE外围设备在应用程序使用期间多次连接和断开连接。这样可以正常工作，但有时候app / phone不再重新连接到外围设备。

所有gatt命令都在主线程上运行，例如

final BluetoothGatt gat = gatt;
Handler handler = new Handler(Looper.getMainLooper());
handler.post(new Runnable() {
@Override
public void run() {
  // This code will be executed on the main thread
  if (Looper.myLooper() == Looper.getMainLooper()) {
    Log.e(TAG, "mGattCallback disconnect2: NOW ON MAIN THREAD :)");
  }
  gat.disconnect();
  }
});

并且外围设备断开正常。当发生这种情况并且我无法重新连接到外围设备时，我会得到大量的日志：

04-07 16:57:56.798: I/bt-hci(2127): BLE HCI(id=62) event = 0x02)
04-07 16:57:56.798: I/bt-hci(2127): btu_ble_process_adv_pkt
04-07 16:57:56.833: I/bt-hci(2127): BLE HCI(id=62) event = 0x02)
04-07 16:57:56.833: I/bt-hci(2127): btu_ble_process_adv_pkt
04-07 16:57:56.871: I/bt-hci(2127): BLE HCI(id=62) event = 0x02)
04-07 16:57:56.871: I/bt-hci(2127): btu_ble_process_adv_pkt
04-07 16:57:56.906: I/bt-hci(2127): BLE HCI(id=62) event = 0x02)
04-07 16:57:56.906: I/bt-hci(2127): btu_ble_process_adv_pkt
04-07 16:57:56.941: I/bt-hci(2127): BLE HCI(id=62) event = 0x02)
04-07 16:57:56.941: I/bt-hci(2127): btu_ble_process_adv_pkt
04-07 16:57:56.977: I/bt-hci(2127): BLE HCI(id=62) event = 0x02)
04-07 16:57:56.977: I/bt-hci(2127): btu_ble_process_adv_pkt
04-07 16:57:57.016: I/bt-hci(2127): BLE HCI(id=62) event = 0x02)
04-07 16:57:57.016: I/bt-hci(2127): btu_ble_process_adv_pkt

我需要退出应用程序，再次关闭蓝牙，然后重新开始正常工作。

任何已知问题，提示或建议？

由于

编辑----------- 经过一些测试后，似乎让应用程序继续运行，最终我得到了以下日志，然后我的外围设备可以重新连接：

04-13 19:11:53.973: I/bt-hci(2034): BLE HCI(id=62) event = 0x02)
04-13 19:11:53.973: I/bt-hci(2034): btu_ble_process_adv_pkt
04-13 19:11:54.076: I/bt-hci(2034): BLE HCI(id=62) event = 0x02)
04-13 19:11:54.076: I/bt-hci(2034): btu_ble_process_adv_pkt
04-13 19:11:55.986: I/bt-hci(2034): BLE HCI(id=62) event = 0x02)
04-13 19:11:55.986: I/bt-hci(2034): btu_ble_process_adv_pkt
04-13 19:11:56.087: I/bt-hci(2034): BLE HCI(id=62) event = 0x02)
04-13 19:11:56.087: I/bt-hci(2034): btu_ble_process_adv_pkt
04-13 19:11:56.629: I/bt-hci(2034): BLE HCI(id=62) event = 0x02)
04-13 19:11:56.629: I/bt-hci(2034): btu_ble_process_adv_pkt
04-13 19:11:56.734: I/bt-hci(2034): BLE HCI(id=62) event = 0x02)
04-13 19:11:56.734: I/bt-hci(2034): btu_ble_process_adv_pkt
04-13 19:11:58.925: D/MDMCTBK(275): reply_len: 40 reply is = IFNAME=wlan0 <3>CTRL-EVENT-SCAN-RESULTS 
04-13 19:11:58.925: D/MDMCTBK(275): Event received = CTRL-EVENT-SCAN-RESULTS 
04-13 19:11:58.926: D/WifiStateMachine(1010): handleMessage: E msg.what=147461
04-13 19:11:58.926: D/WifiStateMachine(1010): processMsg: DisconnectedState
04-13 19:11:58.926: D/WifiStateMachine(1010): processMsg: ConnectModeState
04-13 19:11:58.926: D/WifiStateMachine(1010): processMsg: DriverStartedState
04-13 19:11:58.927: D/WifiStateMachine(1010): processMsg: SupplicantStartedState
04-13 19:11:58.928: D/TCMD(4253): NL - Read 56 bytes from update socket.
04-13 19:11:58.928: D/TCMD(4253): NL - message type is RTM_NEWLINK
04-13 19:11:58.928: D/TCMD(4253): Listening for incoming client connection request
04-13 19:35:18.787: V/AlarmManager(1010): sending alarm Alarm{42b84cc0 type 2 com.google.android.gms}
04-13 19:35:18.787: V/AlarmManager(1010): sending alarm Alarm{42b83a00 type 0 android}
04-13 19:11:58.941: D/WifiStateMachine(1010): handleMessage: X
04-13 19:12:00.615: D/WifiStateMachine(1010): handleMessage: E msg.what=131143
04-13 19:12:00.615: D/WifiStateMachine(1010): processMsg: DisconnectedState
04-13 19:12:00.616: D/WifiStateMachine(1010): processMsg: ConnectModeState
04-13 19:12:00.617: D/WifiStateMachine(1010): processMsg: DriverStartedState
04-13 19:12:00.628: D/WifiStateMachine(1010): handleMessage: X
04-13 19:12:01.425: D/MDMCTBK(275): reply_len: 40 reply is = IFNAME=wlan0 <3>CTRL-EVENT-BSS-REMOVED 1
04-13 19:12:01.425: D/MDMCTBK(275): Event received = CTRL-EVENT-BSS-REMOVED 1
04-13 19:12:01.425: D/MDMCTBK(275): reply_len: 40 reply is = IFNAME=wlan0 <3>CTRL-EVENT-SCAN-RESULTS 
04-13 19:12:01.425: D/MDMCTBK(275): Event received = CTRL-EVENT-SCAN-RESULTS 
04-13 19:12:01.425: D/WifiStateMachine(1010): handleMessage: E msg.what=147461
04-13 19:12:01.426: D/WifiStateMachine(1010): processMsg: DisconnectedState
04-13 19:12:01.426: D/WifiStateMachine(1010): processMsg: ConnectModeState
04-13 19:12:01.426: D/WifiStateMachine(1010): processMsg: DriverStartedState
04-13 19:12:01.426: D/WifiStateMachine(1010): processMsg: SupplicantStartedState
04-13 19:12:01.428: D/MDMCTBK(275): reply_len: 40 reply is = IFNAME=p2p0 <3>CTRL-EVENT-BSS-REMOVED 1 
04-13 19:12:01.428: D/MDMCTBK(275): Event received = CTRL-EVENT-BSS-REMOVED 1 
04-13 19:12:01.428: D/TCMD(4253): NL - Read 56 bytes from update socket.
04-13 19:12:01.428: D/TCMD(4253): NL - message type is RTM_NEWLINK
04-13 19:12:01.428: D/TCMD(4253): Listening for incoming client connection request
04-13 19:12:01.444: D/WifiStateMachine(1010): handleMessage: X

看起来它与WiFi有关吗？！

Answer 1

我认为没有一个简单的答案，比如＆＃34;使用主线程＆＃34;一切都很好。但是我可以给你一些我在使用糟糕的Android BLE时收集的提示：

BT堆栈在不同手机上会有所不同，不幸的是，如果我们谈论BLE，Moto G是最疯狂的手机之一......有多糟糕？平铺应用甚至在F.A.Q What Android phones will Tile work with：

仅适用于三星Galaxy S5，HTC One M8，HTC One，LG Nexus 4，LG Nexus 5，LG Nexus 6，Samsung Note 4，摩托罗拉Moto X 当然不适用于Moto G

尝试瞄准Android 5.0及更高版本，谷歌的这个官方视频说https://www.youtube.com/watch?feature=player_embedded&v=2fZThdNbHcQ#t=0，而且在这里Android Lollipop: Bluetooth LE Matures你可以找到

Bluedroid continues to mature and stabilize; there were 565 commits to the bluedroid project alone from 4.4 -> 5.0, compared with 52 commits from 4.3 -> 4.4, and 47 commits from 4.2 -> 4.3.* This is an area of heavy activity within AOSP right now.

还有maximum number of connections (7) in Android 4.4 and further - 看看大约31分钟

Answer 2

这是一个MotoG特定的问题，我之前在MotoG设备上遇到过相同的问题。从蓝牙低功耗不够成熟时起，Wifi和蓝牙功能会对该特定设备产生相互干扰。

从之前的R＆amp; D我做过，不确定这是否是操作系统版本＆amp;设备特定组合但有一些与蓝牙和Wifi相关的问题，更多的是蓝牙低功耗和Wifi，许多都是特定于设备的。

关于您所面临的问题， Android开源项目 - 问题跟踪器和其他博客也存在问题;

Issue 39995
Issue 41631

Nexus 5, Nexus 4 and Nexus 7 (2013) Android 4.4 Bluetooth Issues
[虽然我在Nexus 5中没有遇到过这个问题]

无论连接数量多少，Wifi都会影响蓝牙低功耗。此外，连接的重新连接和超时也可以是硬件方面的属性。

您的代码很好，希望您节省一些时间，我花了一些时间在MotoG和其他一些设备上;正是通过BluetoothGatt和iBeacon框架与ble-devices交互时蓝牙低能耗和wifi干扰的情况。

Android 4.4.4 Moto G蓝牙LE重新连接问题

2 个答案: