问题
I am creating an application which Connects with the BLE Device with android application programmatically. Here's my code for the Connect / Disconnect
When use clicks on the Connect button
new Thread(new Runnable() {
@Override
public void run() {
mConnecting = true;
mConnectException = null;
mConnectWait.close(); // Reset the condition.
if (mConnectedGatt != null) {
// Reconnect to the BLE DEX adapter.
Logger.d(LOG_TAG, "going to connect");
mConnectedGatt.connect();
BluetoothDevice device = mBluetoothAdapter.getRemoteDevice(deviceAddress);
device.connectGatt(mContext, false, mGattCallback);
} else {
// Start scanning BLE devices.
Logger.d(LOG_TAG, "going to scan LE Devices");
scanLeDevice(true);
}
mConnectWait.block(); // Wait for connect to complete
try {
if (mConnected) {
connectCallback.onConnectSuccess();
} else { // Error occurred in the connecting process
if (null == mConnectException) {
mConnectException = new BleDexException(
"Failed to connect to the BLE DEX adapter",
BleDexException.ERROR_BLE_CONNECT_FAILED);
}
connectCallback.onConnectFailed(mConnectException);
}
} catch (Exception e) {
e.printStackTrace();
}
mConnecting = false;
}
}).start();
Scanning Code:
if (!mBleScanning) {
// Stops scanning after a pre-defined scan period.
mHandler.postDelayed(new Runnable() {
@Override
public void run() {
mBleScanning = false;
if ((null != mBleScanner) && (mBluetoothAdapter.getState() == BluetoothAdapter.STATE_ON)) {
mBleScanner.stopScan(mScanCallback);
if (mConnecting) {
Logger.e(LOG_TAG, "Timed out in scanning BLE devices");
mConnectException = new BleDexException(
"Timed out in scanning BLE devices",
BleDexException.ERROR_BLE_CONNECT_FAILED);
mConnectWait.open();
}
}
}
}, mBleScanPeriod);
mBleScanning = true;
//ScanFilter scanFilter = new ScanFilter.Builder().setServiceUuid(new ParcelUuid(DEX_SERVICE_SPP)).build();
ScanFilter scanFilter = new ScanFilter.Builder().setDeviceName("DEXAdapter").build();
java.util.ArrayList<ScanFilter> scanFilterList = new java.util.ArrayList<ScanFilter>();
scanFilterList.add(scanFilter);
ScanSettings scanSettings = new ScanSettings.Builder()
.setScanMode(ScanSettings.SCAN_MODE_BALANCED)
.build();
if((null != mBleScanner) && (mBluetoothAdapter.getState() == BluetoothAdapter.STATE_ON))
mBleScanner.startScan(scanFilterList, scanSettings, mScanCallback);
}
} else {
Logger.d(LOG_TAG, "stop scanning. what 's the scan flag is: " + mBleScanning);
if (mBleScanning) {
mBleScanning = false;
if ((null != mBleScanner) && (mBluetoothAdapter.getState() == BluetoothAdapter.STATE_ON))
mBleScanner.stopScan(mScanCallback);
}
}
This is the broadcast receiver for pairing intent
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if (BluetoothDevice.ACTION_PAIRING_REQUEST.equals(action)) {
if (mBtPin == null || mBtMacAddress == null) {
return;
}
// Programmatically set the Bluetooth PIN.
device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
pairingRequestType = intent.getIntExtra(BluetoothDevice.EXTRA_PAIRING_VARIANT,
BluetoothDevice.ERROR);
Logger.d(LOG_TAG, "Received pairing request intent, Device mac address is: " + mBtMacAddress +
". Device pairingrequest type is: " + pairingRequestType);
if (device.getAddress().equals(mBtMacAddress)) {
try {
int btpin = Integer.parseInt(mBtPin);
Logger.d(LOG_TAG, "Set pin to BT = " + btpin);
byte[] pinbytes;
pinbytes = ("" + btpin).getBytes("UTF-8");
device.setPin(pinbytes);
abortBroadcast();
} catch (Exception e) {
e.printStackTrace();
}
}
} else if (BluetoothDevice.ACTION_BOND_STATE_CHANGED.equals(action)) {
int state = intent.getIntExtra(BluetoothDevice.EXTRA_BOND_STATE, -1);
switch (state) {
case BluetoothDevice.BOND_NONE:
Logger.d(LOG_TAG, "Remote device is not bonded. Device: ");
case BluetoothDevice.BOND_BONDING:
Logger.d(LOG_TAG, "Remote device is in bonding process");
break;
case BluetoothDevice.BOND_BONDED:
Logger.d(LOG_TAG, "Remote device is paired");
BluetoothDevice bluetoothDevice = mBluetoothAdapter.getRemoteDevice(deviceAddress);
mConnectedGatt = bluetoothDevice.connectGatt(mContext, false, mGattCallback);
if (mConnectedGatt == null) {
Logger.e(LOG_TAG, "Failed to connect to GATT server");
if (mConnecting) {
mConnectException = new BleDexException(
"Failed to connect to GATT server",
BleDexException.ERROR_BLE_CONNECT_FAILED);
mConnectWait.open();
}
}
//scanLeDevice(false);
break;
}
}
}
};
What happens is, as soon as I press the connect button it checks if the device is connected or not? If not it'll start he Bluetooth LE scan. I've added the ScanFilter for scanning the device so that it scans the limited device.
As soon as application receives the scan callback it pairs the device using createbond() method. And once that's done and pairing is complete it'll try to connect the blutooth gatt.
All this works successfully on the first attempt. But after some time the application disconnects the bluetooth device automatically.
This is the logs of automatic disconnection
07-05 15:15:26.101 6698 6698 D BleDexToolkitSample: Invoice send transaction initiated and is in progress.
07-05 15:15:26.103 6698 6765 D BleDexToolkitSample: SetConfigTransmissionControlNumber Success
07-05 15:15:26.103 6698 6765 D BleDexToolkitSample: SetConfigTestIndicator Success
07-05 15:15:26.103 6698 6765 D BleDexToolkitSample: SetRetailer Success
07-05 15:15:26.104 6698 6765 D BleDexToolkitSample: SetSupplier Success
07-05 15:15:26.112 6698 6765 D BleDexToolkitSample: BeginTransactionSet Success
07-05 15:15:26.115 6698 6765 D BleDexToolkitSample: WriteSTSegment Success
07-05 15:15:26.116 6698 6765 D BleDexToolkitSample: WriteG82Segment Success
07-05 15:15:26.116 6698 6765 D BleDexToolkitSample: WriteLoopStart Success
07-05 15:15:26.117 6698 6765 D BleDexToolkitSample: WriteG83Segment Success
07-05 15:15:26.117 6698 6765 D BleDexToolkitSample: WriteG83Segment Success
07-05 15:15:26.118 6698 6765 D BleDexToolkitSample: WriteG22Segment Success
07-05 15:15:26.118 6698 6765 D BleDexToolkitSample: WriteLoopEnd Success
07-05 15:15:26.118 6698 6765 D BleDexToolkitSample: WriteG84Segment Success
07-05 15:15:26.118 6698 6765 D BleDexToolkitSample: WriteG86Segment Success
07-05 15:15:26.118 6698 6765 D BleDexToolkitSample: WriteG85Segment Success
07-05 15:15:26.119 6698 6765 D BleDexToolkitSample: WriteSESegment Success
07-05 15:15:26.119 6698 6765 D BleDexToolkitSample: EndTransactionSet Success
07-05 15:15:26.136 6698 6723 D BleDexDevice: Initiated sending data: 05
07-05 15:15:27.168 6698 6723 D BleDexDevice: Initiated sending data: 05
07-05 15:15:28.174 1934 2382 W bt_btif : bta_gattc_conn_cback() - cif=3 connected=0 conn_id=3 reason=0x0008
07-05 15:15:28.175 1934 2382 W bt_btif : bta_gattc_conn_cback() - cif=4 connected=0 conn_id=4 reason=0x0008
07-05 15:15:28.175 1934 2382 W bt_btif : bta_gattc_conn_cback() - cif=6 connected=0 conn_id=6 reason=0x0008
07-05 15:15:28.176 1934 2049 D BtGatt.GattService: onConnected() connId=5, address=00:10:20:8E:26:97, connected=false
07-05 15:15:28.176 1934 2382 W bt_btif : bta_gattc_conn_cback() - cif=8 connected=0 conn_id=8 reason=0x0008
07-05 15:15:28.176 1934 2049 D BluetoothGattServer: onServerConnectionState() - status=0 serverIf=5 device=00:10:20:8E:26:97
07-05 15:15:28.180 1934 2049 D BtGatt.GattService: onDisconnected() - clientIf=8, connId=8, address=00:10:20:8E:26:97
07-05 15:15:28.181 6698 6711 D BluetoothGatt: onClientConnectionState() - status=8 clientIf=8 device=00:10:20:8E:26:97
07-05 15:15:28.181 6698 6711 E BleDexDevice: onConnectionStateChange failure status=8 newState=0
07-05 15:15:28.183 1934 2049 E BluetoothRemoteDevices: state12newState1
07-05 15:15:28.183 1934 2049 D BluetoothRemoteDevices: aclStateChangeCallback: State:DisConnected to Device:00:10:20:8E:26:97
07-05 15:15:28.189 6698 6698 D BleDexToolkitSample: BLE DEX Adapter disconnected.
07-05 15:15:28.193 1934 1934 D AvrcpBipRsp: onReceive: android.bluetooth.device.action.ACL_DISCONNECTED
07-05 15:15:28.193 1934 1934 D BluetoothMapService: onReceive
07-05 15:15:28.193 1934 1934 D BluetoothMapService: onReceive: android.bluetooth.device.action.ACL_DISCONNECTED
07-05 15:15:28.194 1934 1934 E BluetoothMapService: Unexpected error!
07-05 15:15:28.194 1934 1934 D BluetoothPbapReceiver: PbapReceiver onReceive action = android.bluetooth.device.action.ACL_DISCONNECTED
07-05 15:15:28.195 1934 1934 D BluetoothPbapReceiver: Calling start service with action = null
07-05 15:15:28.199 1934 1934 I BluetoothPbapReceiver: Exit - onReceive for intent:android.bluetooth.device.action.ACL_DISCONNECTED
07-05 15:15:28.199 1934 1934 D BluetoothPbapService: Enter - onStartCommand for service PBAP
07-05 15:15:28.200 1934 1934 D BluetoothPbapService: action: android.bluetooth.device.action.ACL_DISCONNECTED
07-05 15:15:28.200 1934 1934 D BluetoothPbapService: Exit - onStartCommand for service PBAP
07-05 15:15:28.203 1934 1952 E BtGatt.GattService: writeCharacteristic() - No connection for 00:10:20:8E:26:97...
07-05 15:15:28.203 6698 6723 D BleDexDevice: Initiated sending data: 05
07-05 15:15:28.219 1934 4912 D A2dpService: getA2DPService(): returning com.android.bluetooth.a2dp.A2dpService@b82a9b1
07-05 15:15:28.219 4939 4939 I BTLEASH : BTReceive action : android.bluetooth.device.action.ACL_DISCONNECTED :: Device : DEXAdapter
07-05 15:15:28.233 1934 1934 V BluetoothFtpService: PARSE INTENT action: android.bluetooth.device.action.ACL_DISCONNECTED
07-05 15:15:28.239 1934 1934 D BluetoothDunService: parseIntent: action: android.bluetooth.device.action.ACL_DISCONNECTED
Now I changed the behavior of the application a little bit, rather than pairing and connecting the device, I directly connect the device without pairing. With this changes what I saw is the bluetooth connection is disconnected automatically after 30 seconds of connection. Below are the logs:
=Bluetooth Connected successfully logs =
07-10 13:27:00.554 5001 5001 D BleDexToolkitSample: Connecting to BLE DEX Adapter.
07-10 13:27:00.556 5001 5338 D BleDexDevice: device found, device address is: 00:10:20:8E:26:97
07-10 13:27:00.557 5001 5338 D BluetoothGatt: connect() - device: 00:10:20:8E:26:97, auto: false
07-10 13:27:00.558 5001 5338 D BluetoothGatt: registerApp()
07-10 13:27:00.558 5001 5338 D BluetoothGatt: registerApp() - UUID=9ed830a0-85b0-4192-9b4d-c9960f5bca84
07-10 13:27:00.560 1957 2829 D BtGatt.GattService: registerClient() - UUID=9ed830a0-85b0-4192-9b4d-c9960f5bca84
07-10 13:27:00.562 1957 2068 D BtGatt.GattService: onClientRegistered() - UUID=9ed830a0-85b0-4192-9b4d-c9960f5bca84, clientIf=9
07-10 13:27:00.562 5001 5015 D BluetoothGatt: onClientRegistered() - status=0 clientIf=9
07-10 13:27:00.563 1957 5052 D A2dpService: getA2DPService(): returning com.android.bluetooth.a2dp.A2dpService@d4dde01
07-10 13:27:00.564 1957 5052 I A2dpService: audio isMusicActive is false
07-10 13:27:00.565 1957 5052 D BtGatt.GattService: clientConnect() - address=00:10:20:8E:26:97, isDirect=true
07-10 13:27:00.565 1957 2068 D bt_btif_config: btif_get_address_type: Device [00:10:20:8e:26:97] address type 0
07-10 13:27:00.566 1957 2068 D bt_btif_config: btif_get_device_type: Device [00:10:20:8e:26:97] type 2
07-10 13:27:00.567 1957 2319 W bt_l2cap: l2cble_init_direct_conn
07-10 13:27:00.573 2198 2304 I WCNSS_FILTER: ibs_bt_device_wakeup: Writing IBS_WAKE_IND
07-10 13:27:01.577 2198 2325 I WCNSS_FILTER: ibs_wcnss_bt_device_sleep: TX Awake, Sending SLEEP_IND
07-10 13:27:01.926 1957 2319 W bt_btm : btm_acl_created hci_handle=4 link_role=0 transport=2
07-10 13:27:01.927 2198 2304 I WCNSS_FILTER: ibs_bt_device_wakeup: Writing IBS_WAKE_IND
07-10 13:27:01.946 1957 2068 D BtGatt.GattService: onConnected() connId=5, address=00:10:20:8E:26:97, connected=true
07-10 13:27:01.946 1957 2068 D BluetoothGattServer: onServerConnectionState() - status=0 serverIf=5 device=00:10:20:8E:26:97
07-10 13:27:01.946 1957 2319 W bt_smp : smp_br_connect_callback is called on unexpected transport 2
07-10 13:27:01.948 1957 2068 D bt_btif_config: btif_get_device_type: Device [00:10:20:8e:26:97] type 2
07-10 13:27:01.948 1957 2319 E bt_btif : bta_dm_acl_change new acl connetion:count = 1
07-10 13:27:01.949 1957 2319 W bt_btif : bta_dm_acl_change info: 0x0
07-10 13:27:01.949 1957 2319 W bt_l2cap: L2CA_SetDesireRole() new:x1, disallow_switch:0
07-10 13:27:01.949 1957 2068 D BluetoothRemoteDevices: Property type: 4
07-10 13:27:01.950 1957 2319 E bt_btif : bta_gattc_cache_load: can't open GATT cache file /data/misc/bluetooth/gatt_cache_0010208e2697 for reading, error: No such file or directory
07-10 13:27:01.952 1957 2068 D BluetoothRemoteDevices: Remote class is:7936
07-10 13:27:01.953 1957 2068 D BluetoothRemoteDevices: Property type: 5
07-10 13:27:01.953 1957 2068 D bt_btif_config: btif_get_device_type: Device [00:10:20:8e:26:97] type 2
07-10 13:27:01.953 1957 2068 I bt_btif_dm: get_cod remote_cod = 0x00001f00
07-10 13:27:01.953 1957 2068 I BluetoothBondStateMachine: bondStateChangeCallback: Status: 0 Address: 00:10:20:8E:26:97 newState: 1
07-10 13:27:01.954 1957 2068 I BluetoothBondStateMachine: sspRequestCallback: [B@f9753ea name: [B@ffc36db cod: 7936 pairingVariant 2 passkey: 0
07-10 13:27:01.955 1957 2068 D bt_btif_dm: remote version info [00:10:20:8e:26:97]: 0, 0, 0
07-10 13:27:01.957 1957 2068 E BluetoothRemoteDevices: state12newState0
07-10 13:27:01.957 1957 2068 D BluetoothRemoteDevices: aclStateChangeCallback: State:Connected to Device:00:10:20:8E:26:97
07-10 13:27:01.957 1957 2069 I BluetoothBondStateMachine: Bond State Change Intent:00:10:20:8E:26:97 OldState: 10 NewState: 11
07-10 13:27:01.957 1957 2069 I BluetoothBondStateMachine: Entering PendingCommandState State
07-10 13:27:01.958 2128 2128 W BluetoothEventManager: CachedBluetoothDevice for device 00:10:20:8E:26:97 not found, calling readPairedDevices().
07-10 13:27:01.961 2128 2128 E BluetoothEventManager: Got bonding state changed for 00:10:20:8E:26:97, but we have no record of that device.
07-10 13:27:01.974 1957 2068 D BtGatt.GattService: onConnected() - clientIf=9, connId=9, address=00:10:20:8E:26:97
07-10 13:27:01.975 5001 5015 D BluetoothGatt: onClientConnectionState() - status=0 clientIf=9 device=00:10:20:8E:26:97
07-10 13:27:01.975 5001 5015 D BluetoothGatt: discoverServices() - device: 00:10:20:8E:26:97
07-10 13:27:01.977 1957 2173 D BtGatt.GattService: discoverServices() - address=00:10:20:8E:26:97, connId=9
07-10 13:27:01.978 1957 1957 V BluetoothFtpService: Ftp Service onStartCommand
07-10 13:27:01.978 1957 1957 V BluetoothFtpService: PARSE INTENT action: android.bluetooth.device.action.BOND_STATE_CHANGED
07-10 13:27:01.984 5001 5001 D BleDexDevice: Received pairing request intent, Device mac address is: 00:10:20:8E:26:97. Device pairingrequest type is: 3
07-10 13:27:01.984 5001 5001 D BleDexDevice: Set pin to BT = 369371
07-10 13:27:01.986 1957 1957 D A2dpService: getA2DPService(): returning com.android.bluetooth.a2dp.A2dpService@d4dde01
07-10 13:27:01.987 1957 1957 D BluetoothFtpService: device: DEXAdapter
07-10 13:27:01.987 1957 2319 W bt_smp : SMP_PasskeyReply() - Wrong State: 1
07-10 13:27:01.990 1957 2319 E bt_btm : BTM_SetBlePhy failed, peer does not support request
07-10 13:27:01.993 1957 1957 D BluetoothDunService: parseIntent: action: android.bluetooth.device.action.BOND_STATE_CHANGED
07-10 13:27:02.000 1957 1957 D A2dpService: getA2DPService(): returning com.android.bluetooth.a2dp.A2dpService@d4dde01
07-10 13:27:02.002 1957 1957 D BluetoothDunService: device: DEXAdapter
07-10 13:27:02.456 1957 2319 W bt_btm : btm_read_remote_version_complete: BDA: 00-10-20-8e-26-97
07-10 13:27:02.456 1957 2319 W bt_btm : btm_read_remote_version_complete lmp_version 7 manufacturer 13 lmp_subversion 528
07-10 13:27:02.837 1957 2319 W bt_bta_gattc: bta_gattc_explore_srvc no more services found
07-10 13:27:02.840 1957 2068 D BtGatt.GattService: onSearchCompleted() - connId=9, status=0
07-10 13:27:02.843 1957 2068 D bt_bta_gattc: bta_gattc_get_gatt_db
07-10 13:27:02.845 1957 2068 D BtGatt.GattService: onGetGattDb() - address=00:10:20:8E:26:97
07-10 13:27:02.846 1957 2068 D BtGatt.GattService: got service with UUID=00001800-0000-1000-8000-00805f9b34fb
07-10 13:27:02.846 1957 2068 D BtGatt.GattService: got characteristic with UUID=00002a00-0000-1000-8000-00805f9b34fb
07-10 13:27:02.846 1957 2068 D BtGatt.GattService: got characteristic with UUID=00002a01-0000-1000-8000-00805f9b34fb
07-10 13:27:02.846 1957 2068 D BtGatt.GattService: got characteristic with UUID=00002a04-0000-1000-8000-00805f9b34fb
07-10 13:27:02.846 1957 2068 D BtGatt.GattService: got service with UUID=00001801-0000-1000-8000-00805f9b34fb
07-10 13:27:02.846 1957 2068 D BtGatt.GattService: got service with UUID=f000c0e0-0451-4000-b000-000000000000
07-10 13:27:02.846 1957 2068 D BtGatt.GattService: got characteristic with UUID=f000c0e1-0451-4000-b000-000000000000
07-10 13:27:02.846 1957 2068 D BtGatt.GattService: got descriptor with UUID=00002902-0000-1000-8000-00805f9b34fb
07-10 13:27:02.846 1957 2068 D BtGatt.GattService: got descriptor with UUID=00002901-0000-1000-8000-00805f9b34fb
07-10 13:27:02.847 1957 2068 D BtGatt.GattService: got characteristic with UUID=f000c0e2-0451-4000-b000-000000000000
07-10 13:27:02.847 1957 2068 D BtGatt.GattService: got descriptor with UUID=00002901-0000-1000-8000-00805f9b34fb
07-10 13:27:02.847 1957 2068 D BtGatt.GattService: got service with UUID=f000ffd0-0451-4000-b000-000000000000
07-10 13:27:02.847 1957 2068 D BtGatt.GattService: got characteristic with UUID=f000ffd1-0451-4000-b000-000000000000
07-10 13:27:02.847 1957 2068 D BtGatt.GattService: got descriptor with UUID=00002901-0000-1000-8000-00805f9b34fb
07-10 13:27:02.848 1957 2068 D BtGatt.GattService: got characteristic with UUID=f000ffd2-0451-4000-b000-000000000000
07-10 13:27:02.848 1957 2068 D BtGatt.GattService: got descriptor with UUID=00002901-0000-1000-8000-00805f9b34fb
07-10 13:27:02.848 1957 2068 D BtGatt.GattService: got characteristic with UUID=f000ffd3-0451-4000-b000-000000000000
07-10 13:27:02.848 1957 2068 D BtGatt.GattService: got descriptor with UUID=00002902-0000-1000-8000-00805f9b34fb
07-10 13:27:02.848 1957 2068 D BtGatt.GattService: got descriptor with UUID=00002901-0000-1000-8000-00805f9b34fb
07-10 13:27:02.848 1957 2068 D BtGatt.GattService: got service with UUID=0000180f-0000-1000-8000-00805f9b34fb
07-10 13:27:02.848 1957 2068 D BtGatt.GattService: got characteristic with UUID=00002a19-0000-1000-8000-00805f9b34fb
07-10 13:27:02.848 1957 2068 D BtGatt.GattService: got descriptor with UUID=00002902-0000-1000-8000-00805f9b34fb
07-10 13:27:02.848 1957 2068 D BtGatt.GattService: got descriptor with UUID=00002904-0000-1000-8000-00805f9b34fb
07-10 13:27:02.854 5001 5015 D BluetoothGatt: onSearchComplete() = Device=00:10:20:8E:26:97 Status=0
07-10 13:27:02.855 5001 5015 D BluetoothGatt: setCharacteristicNotification() - uuid: f000c0e1-0451-4000-b000-000000000000 enable: true
07-10 13:27:02.856 1957 1972 D BtGatt.GattService: registerForNotification() - address=00:10:20:8E:26:97 enable: true
07-10 13:27:02.857 1957 2068 D BtGatt.GattService: onRegisterForNotifications() - address=null, status=0, registered=1, handle=11
07-10 13:27:02.863 5001 5338 D BleDexToolkitSample: BLE DEX Adapter connection Success
07-10 13:27:02.870 5001 5001 D BleDexToolkitSample: BLE DEX Adapter connection Success.
07-10 13:27:03.863 2198 2325 I WCNSS_FILTER: ibs_wcnss_bt_device_sleep: TX Awake, Sending SLEEP_IND
07-10 13:27:07.947 2198 2304 I WCNSS_FILTER: ibs_bt_device_wakeup: Writing IBS_WAKE_IND
07-10 13:27:08.950 2198 2325 I WCNSS_FILTER: ibs_wcnss_bt_device_sleep: TX Awake, Sending SLEEP_IND
=android device disconneted the ble =
07-10 13:27:31.953 1957 2068 D bt_btif_config: btif_get_device_type: Device [00:10:20:8e:26:97] type 2
07-10 13:27:31.953 1957 2068 I bt_btif_dm: get_cod remote_cod = 0x00001f00
07-10 13:27:31.953 2172 5348 E bt_logger: Deleting old log file /data/media/0/bt_vnd_log20190710131438.txt
07-10 13:27:31.954 1957 2068 I BluetoothBondStateMachine: bondStateChangeCallback: Status: 1 Address: 00:10:20:8E:26:97 newState: 0
07-10 13:27:31.955 2172 5348 E bt_logger: Writing logs to file
07-10 13:27:31.955 1957 2069 D BluetoothAdapterProperties: Failed to remove device: 00:10:20:8E:26:97
07-10 13:27:31.962 2128 2128 W BluetoothEventManager: CachedBluetoothDevice for device 00:10:20:8E:26:97 not found, calling readPairedDevices().
07-10 13:27:31.964 1957 2069 I BluetoothBondStateMachine: Bond State Change Intent:00:10:20:8E:26:97 OldState: 11 NewState: 10
07-10 13:27:31.968 1957 2069 D A2dpService: getA2DPService(): returning com.android.bluetooth.a2dp.A2dpService@d4dde01
07-10 13:27:31.970 1957 2069 D A2dpService: Enter setPriority
07-10 13:27:31.972 1957 2069 D A2dpService: Saved priority 00:10:20:8E:26:97 = -1
07-10 13:27:31.972 1957 2069 D A2dpService: Exit setPriority
07-10 13:27:31.972 2128 2128 E BluetoothEventManager: Got bonding state changed for 00:10:20:8E:26:97, but we have no record of that device.
07-10 13:27:31.975 1957 2069 I BluetoothBondStateMachine: StableState(): Entering Off State
07-10 13:27:31.990 1957 1957 V BluetoothFtpService: Ftp Service onStartCommand
07-10 13:27:31.990 1957 1957 V BluetoothFtpService: PARSE INTENT action: android.bluetooth.device.action.BOND_STATE_CHANGED
07-10 13:27:31.994 1957 1957 D A2dpService: getA2DPService(): returning com.android.bluetooth.a2dp.A2dpService@d4dde01
07-10 13:27:31.994 1957 1957 D BluetoothFtpService: device: DEXAdapter
07-10 13:27:31.996 1957 1957 D A2dpService: getA2DPService(): returning com.android.bluetooth.a2dp.A2dpService@d4dde01
07-10 13:27:31.996 1957 1957 D BluetoothFtpService: BOND_STATE_CHANGED REFRESH trustDevices DEXAdapter
07-10 13:27:32.002 1957 1957 D BluetoothDunService: parseIntent: action: android.bluetooth.device.action.BOND_STATE_CHANGED
07-10 13:27:32.003 1957 1957 D A2dpService: getA2DPService(): returning com.android.bluetooth.a2dp.A2dpService@d4dde01
07-10 13:27:32.004 1957 1957 D BluetoothDunService: device: DEXAdapter
07-10 13:27:32.005 1957 1957 D A2dpService: getA2DPService(): returning com.android.bluetooth.a2dp.A2dpService@d4dde01
07-10 13:27:32.005 1957 1957 D BluetoothDunService: BOND_STATE_CHANGED REFRESH trustDevices DEXAdapter
07-10 13:27:32.020 1937 2199 W BluetoothEventManager: showUnbondMessage: Not displaying any message for reason: 9
07-10 13:27:32.021 2681 3699 I LicenseObserver: installLicenses - /storage/emulated/0/bt_vnd_log20190710132731.txt
07-10 13:27:34.953 1957 2066 D bt_osi_alarm: reschedule_root_alarm alarm expiration too close for posix timers, switching to guns
07-10 13:27:34.959 2198 2304 I WCNSS_FILTER: ibs_bt_device_wakeup: Writing IBS_WAKE_IND
07-10 13:27:34.994 1957 2319 W bt_btif : bta_gattc_conn_cback() - cif=3 connected=0 conn_id=3 reason=0x0016
07-10 13:27:34.994 1957 2319 W bt_btif : bta_gattc_conn_cback() - cif=4 connected=0 conn_id=4 reason=0x0016
07-10 13:27:34.995 1957 2319 W bt_btif : bta_gattc_conn_cback() - cif=6 connected=0 conn_id=6 reason=0x0016
07-10 13:27:34.995 1957 2319 W bt_btif : bta_gattc_conn_cback() - cif=7 connected=0 conn_id=7 reason=0x0016
07-10 13:27:34.995 1957 2319 W bt_btif : bta_gattc_conn_cback() - cif=8 connected=0 conn_id=8 reason=0x0016
07-10 13:27:34.995 1957 2068 D BtGatt.GattService: onConnected() connId=5, address=00:10:20:8E:26:97, connected=false
07-10 13:27:34.995 1957 2319 W bt_btif : bta_gattc_conn_cback() - cif=9 connected=0 conn_id=9 reason=0x0016
07-10 13:27:34.995 1957 2068 D BluetoothGattServer: onServerConnectionState() - status=0 serverIf=5 device=00:10:20:8E:26:97
07-10 13:27:34.996 1957 2319 I bt_btm_sec: btm_sec_disconnected clearing pending flag handle:4 reason:22
07-10 13:27:34.998 1957 2068 D BtGatt.GattService: onDisconnected() - clientIf=9, connId=9, address=00:10:20:8E:26:97
07-10 13:27:34.999 5001 5014 D BluetoothGatt: onClientConnectionState() - status=22 clientIf=9 device=00:10:20:8E:26:97
07-10 13:27:34.999 5001 5014 D BleDexDevice: onConnectionStateChange failure status=22 newState=0
07-10 13:27:34.999 2172 2172 E bt_logger: Logger Process: Invalid packet with no length field
07-10 13:27:34.999 2172 2172 E bt_logger: Error saving packet, buff = ound p_reg tcb_idx=0 gatt_if=9 conn_id=0x9�\
07-10 13:27:34.999 2172 2172 E bt_logger: Error saving packet, buff =
07-10 13:27:35.000 1957 2319 W bt_l2cap: L2CA_SetDesireRole() new:x1, disallow_switch:0
07-10 13:27:35.001 1957 2319 E bt_btif : bta_gattc_mark_bg_conn unable to find the bg connection mask for: 00:10:20:8e:26:97
07-10 13:27:35.002 1957 2068 E BluetoothRemoteDevices: state12newState1
07-10 13:27:35.002 1957 2068 D BluetoothRemoteDevices: aclStateChangeCallback: State:DisConnected to Device:00:10:20:8E:26:97
07-10 13:27:35.004 5001 5001 D BleDexToolkitSample: BLE DEX Adapter disconnected.
07-10 13:27:35.006 1957 1957 D AvrcpBipRsp: onReceive: android.bluetooth.device.action.ACL_DISCONNECTED
07-10 13:27:35.006 1957 1957 D BluetoothMapService: onReceive
07-10 13:27:35.006 1957 1957 D BluetoothMapService: onReceive: android.bluetooth.device.action.ACL_DISCONNECTED
07-10 13:27:35.006 1957 1957 E BluetoothMapService: Unexpected error!
07-10 13:27:35.008 1957 1957 D BluetoothPbapReceiver: PbapReceiver onReceive action = android.bluetooth.device.action.ACL_DISCONNECTED
07-10 13:27:35.009 1957 1957 D BluetoothPbapReceiver: Calling start service with action = null
07-10 13:27:35.012 1957 1957 I BluetoothPbapReceiver: Exit - onReceive for intent:android.bluetooth.device.action.ACL_DISCONNECTED
07-10 13:27:35.013 1957 1957 D BluetoothPbapService: Enter - onStartCommand for service PBAP
07-10 13:27:35.013 1957 1957 D BluetoothPbapService: action: android.bluetooth.device.action.ACL_DISCONNECTED
07-10 13:27:35.013 1957 1957 D BluetoothPbapService: Exit - onStartCommand for service PBAP
07-10 13:27:35.026 1957 2829 D A2dpService: getA2DPService(): returning com.android.bluetooth.a2dp.A2dpService@d4dde01
07-10 13:27:35.027 5034 5034 I BTLEASH : BTReceive action : android.bluetooth.device.action.ACL_DISCONNECTED :: Device : DEXAdapter
07-10 13:27:35.030 1957 1970 D A2dpService: getA2DPService(): returning com.android.bluetooth.a2dp.A2dpService@d4dde01
07-10 13:27:35.045 1957 1957 V BluetoothFtpService: Ftp Service onStartCommand
07-10 13:27:35.046 1957 1957 V BluetoothFtpService: PARSE INTENT action: android.bluetooth.device.action.ACL_DISCONNECTED
07-10 13:27:35.053 1957 1957 D BluetoothDunService: parseIntent: action: android.bluetooth.device.action.ACL_DISCONNECTED
07-10 13:27:36.005 2198 2325 I WCNSS_FILTER: ibs_wcnss_bt_device_sleep: TX Awake, Sending SLEEP_IND
^C
Thanks in Advance.
回答1:
Disconnect with reason 8 means Connection Timeout, and that's a hardware issue (not a software issue). The only reason it otherwise fails (at least what I can think of right now) with Connection Timeout is when the two devices try to use two different bonding keys. Then both set up the encryption with different keys, and then it fails due to this.
You could use an air sniffer to possibly find out why or when it's disconnecting.
回答2:
If Android disconnects after 30 seconds, it means the remote device does not respond to a request such as GATT request or SMP (pairing) request. Please make sure the remote device correctly answers to all requests. If you don't know which request isn't responded to, please use the HCI log or an air sniffer to see which packet there is no response for.
回答3:
Skip the scanning, when already knowing the MAC addresses, but keep the pairing in place - unless it's not the other side's firmware terminating the connection unexpectedly. A firmware with random connection drops may at least help testing that.
来源：https://stackoverflow.com/questions/57892013/bluetooth-connection-drops-automatically-with-anrdoid-application