我有一个 BLE 应用程序可以在 Android 6.0 及更高版本的设备上运行，但我在 Samsung Galaxy Core Prime (Android 5.1.1) 上遇到问题。调用 connectGatt 后没有任何反应，回调仅接收断开连接状态。

我已经剪下了合适的代码:

BluetoothManager bluetoothManager = (BluetoothManager) getSystemService(Context.BLUETOOTH_SERVICE);
BluetoothAdapter bluetoothAdapter = bluetoothManager.getAdapter();
final BluetoothDevice device = bluetoothAdapter.getRemoteDevice(address);
Log.e("BluetoothLeService", "connect: connectGatt(this, false, mGattCallback)");
BluetoothGatt bluetoothGatt = device.connectGatt(this, false, mGattCallback);

private final BluetoothGattCallback mGattCallback = new BluetoothGattCallback() {
    @Override
    public void onConnectionStateChange(BluetoothGatt gatt, int status, int newState) {
        if (newState == BluetoothProfile.STATE_CONNECTED) {
            Log.e("BluetoothLeService", "onConnectionStateChange: STATE_CONNECTED");
        } else if (newState == BluetoothProfile.STATE_DISCONNECTED) {
            Log.e("BluetoothLeService", "onConnectionStateChange: STATE_DISCONNECTED");
        }
    }

    @Override
    public void onServicesDiscovered(BluetoothGatt gatt, int status) {
    }

    @Override
    public void onCharacteristicWrite(BluetoothGatt gatt, BluetoothGattCharacteristic characteristic, int status) {
    }

    @Override
    public void onCharacteristicRead(BluetoothGatt gatt, BluetoothGattCharacteristic characteristic, int status) {
    }

    @Override
    public void onCharacteristicChanged(BluetoothGatt gatt, BluetoothGattCharacteristic characteristic) {
    }

    @Override
    public void onMtuChanged (BluetoothGatt gatt, int mtu, int status) {
    }
};

这是日志:

E/BluetoothLeService: connect: connectGatt(this, false, mGattCallback)
I/StatusBar: Icon Only
D/BluetoothGatt: connect() - device: CC:4B:73:22:9D:DB, auto: false
D/BluetoothGatt: registerApp()
D/BluetoothGatt: registerApp() - UUID=7d428718-b549-4021-8a45-9d3bd2afd462
D/BtGatt.GattService: registerClient() - UUID=7d428718-b549-4021-8a45-9d3bd2afd462
D/SamsungIME: Dismiss ExpandCandiate
D/PanelView: There is/are notification(s) 
D/CustomFrequencyManagerService: releaseDVFSLockLocked : Getting Lock type frm List : DVFS_MIN_LIMIT  frequency : 1248000  uid : 1000  pid : 2975  tag : ACTIVITY_RESUME_BOOSTER@4
I/Timeline: Timeline: Activity_windows_visible id: ActivityRecord{2bfa99a5 u0 com.streamunlimited.streamsdkdemo/.ui.setup.SetupDeviceActivity t43} time:3838458
W/ActivityManager: mDVFSHelper.release()
D/CustomFrequencyManagerService: acquireDVFSLockLocked : type : DVFS_MIN_LIMIT  frequency : 1248000  uid : 1000  pid : 2975  pkgName : ACTIVITY_RESUME_BOOSTER@8
D/BtGatt.GattService: onClientRegistered() - UUID=7d428718-b549-4021-8a45-9d3bd2afd462, clientIf=6
D/BluetoothLeService: Trying to create a new connection.
D/BluetoothGatt: onClientRegistered() - status=0 clientIf=6
D/BtGatt.GattService: clientConnect() - address=CC:4B:73:22:9D:DB, isDirect=true set own addr = false own addr type:0
D/BtGatt.btif: btif_get_device_type: Device [cc:4b:73:22:9d:db] type 3, addr. type 0
D/IOP_DB_BT: db_query_create: id EnforceMasterRole :: key KEY_BDADDR, value cc:4b:73:22:9d:db
D/IOP_DB_BT: db_query_add_key: key KEY_LMP_MFCT, value 15
D/IOP_DB_BT: db_query_add_key: key KEY_LMP_VER, value 9:24838
D/IOP_DB_BT: db_query_add_key: key KEY_DIR_ALL, value 1
D/IOP_DB_BT: db_query_execute: result 1
D/bluedroid-mrvl: bt_vnd_mrvl_if_op(L95): opcode = 7
I/SurfaceFlinger: id=153 Removed TetupScanAc (3/9)
I/SurfaceFlinger: id=153 Removed TetupScanAc (-2/9)
I/Timeline: Timeline: Activity_idle id: android.os.BinderProxy@21558ec5 time:3838516
W/SurfaceFlinger: couldn't log to binary event log: overflow.
D/CustomFrequencyManagerService: releaseDVFSLockLocked : Getting Lock type frm List : DVFS_MIN_LIMIT  frequency : 1248000  uid : 1000  pid : 2975  tag : ACTIVITY_RESUME_BOOSTER@8
D/BatteryService: !@BatteryListener : batteryPropertiesChanged!
W/bt-btif: bta_gattc_conn_cback() - cif=4 connected=0 conn_id=4 reason=0x0004
W/bt-btif: bta_gattc_conn_cback() - cif=5 connected=0 conn_id=5 reason=0x0004
W/bt-btif: bta_gattc_conn_cback() - cif=6 connected=0 conn_id=6 reason=0x0004
D/BtGatt.GattService: onConnected() - clientIf=6, connId=0, address=CC:4B:73:22:9D:DB
D/BluetoothGatt: onClientConnectionState() - status=133 clientIf=6 device=CC:4B:73:22:9D:DB
E/BluetoothLeService: onConnectionStateChange: STATE_DISCONNECTED

看起来可疑的行是:

W/bt-btif: bta_gattc_conn_cback() - cif=4 connected=0 conn_id=4 reason=0x0004
W/bt-btif: bta_gattc_conn_cback() - cif=5 connected=0 conn_id=5 reason=0x0004
W/bt-btif: bta_gattc_conn_cback() - cif=6 connected=0 conn_id=6 reason=0x0004

我发现原因 4 意味着:

PAGE TIMEOUT (0x04)
The Page Timeout error code indicates that a page timed out because of the
Page Timeout configuration parameter. This error code may occur only with the
Remote_Name_Request and Create_Connection commands.

在文档中 https://www.bluetooth.org/DocMan/handlers/DownloadDoc.ashx?doc_id=421043&_ga=2.243934277.1321770839.1542020684-854809025.1539785109

还有这一行:

D/BluetoothGatt: onClientConnectionState() - status=133 clientIf=6 device=CC:4B:73:22:9D:DB

只是一个基于 GATT_ERROR 的宏:

https://android.googlesource.com/platform/external/bluetooth/bluedroid/+/android-4.4.4_r2.0.1/stack/include/gatt_api.h

我也尝试过 nRF Connect 应用程序，但它也无法连接:错误 133 (0x85):GATT ERROR

您知道这可能的原因和解决方案吗？ 谢谢

最佳答案

错误状态133可能有多种原因，因为它是Android系统报告的一般错误。可能的原因:

1. 当外设超出范围/建立时关闭 连接
2. 当 Android BLE 堆栈无法正常工作时(有时关闭和打开蓝牙适配器和 WiFi 会有所帮助)
3. 当外围设备不符合 BLE 规范时
4. 当手机 BLE 驱动程序不够好时
5. 其他(查谷歌)

最简单的解决方法是，如果因此类错误而失败，则重试连接。

我强烈推荐使用 Polidea's RxAndroidBle Library对于实现 BLE 通信，非常有用。

如果您开始使用它，那么您可以尝试建立连接，如果失败则使用运算符 retryWhen 重试。 You can get some clues in this answer .

关于android - 连接到无法在 Samsung Galaxy Core Prime (Android 5.1.1) 上运行的 gatt 服务器，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/53261130/