Android 蓝牙外设：连接被对端终止（状态 19）
Android Bluetooth Peripheral: Connection terminated by peer (Status 19)
开发了一个充当外围设备并与其他设备（仅限中央设备）连接的应用程序。
它在 OS 版本 6.0 的设备上运行良好，但在 Nougat 7.0 中出现一些问题。
我收集了一些日志，在开发者选项中启用"Bluetooth HCI snoop log"。
收集的日志：
W/bt_btm: btm_sec_disconnect : reason=19
W/bt_btif: btif_dm_generic_evt: event=33035
W/bt_btif: btif_dm_generic_evt: event=33035
W/bt_btm: btm_sec_send_hci_disconnect: handle:0x41, reason=0x13
W/bt_btif: btif_dm_generic_evt: event=33035
W/bt_btif: bta_gattc_conn_cback() - cif=3 connected=0 conn_id=3 reason=0x0016
W/bt_btif: bta_gattc_conn_cback() - cif=4 connected=0 conn_id=4 reason=0x0016
W/bt_btif: bta_gattc_conn_cback() - cif=5 connected=0 conn_id=5 reason=0x0016
W/bt_btif: bta_gattc_conn_cback() - cif=7 connected=0 conn_id=7 reason=0x0016
W/bt_btif: bta_dm_bl_change_cback : reason=22
W/bt_btif: bta_dm_bl_change_cback : reason=22
W/bt_btm: btm_sec_disconnected
W/bt_btif: conn.link_down.is_removed : 0
D/BtGatt.GattService: onClientConnected() serverIf: 6, connId=6, address=00:16:A4:13:1E:48, connected=false
W/bt_btif: btif_dm_upstreams_cback ev: BTA_DM_LINK_DOWN_EVT
W/bt_btif: BTA_DM_LINK_DOWN_EVT. Sending BT_ACL_STATE_DISCONNECTED
外围服务（代码）：
private boolean addService() {
if (null == mGattServer) {
Logger.printLog(TAG, "mGattServer is null");
return false;
}
BluetoothGattService service = new BluetoothGattService(UUID_pService,
BluetoothGattService.SERVICE_TYPE_PRIMARY);
//Defined descriptor for CCC and CEP
final BluetoothGattDescriptor cccDescriptor = new BluetoothGattDescriptor(UUID.fromString("00002902-0000-1000-8000-00805f9b34fb"), BluetoothGattDescriptor.PERMISSION_READ_ENCRYPTED);
cccDescriptor.setValue(BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE);
final BluetoothGattDescriptor cepDescriptor = new BluetoothGattDescriptor(UUID.fromString("00002900-0000-1000-8000-00805f9b34fb"), BluetoothGattDescriptor.PERMISSION_READ_ENCRYPTED);
cepDescriptor.setValue(BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE);
pairingCharacteristic = new BluetoothGattCharacteristic(UUID_pCharac,
BluetoothGattCharacteristic.PROPERTY_READ | BluetoothGattCharacteristic.PROPERTY_NOTIFY | BluetoothGattCharacteristic.PROPERTY_WRITE | BluetoothGattCharacteristic.PROPERTY_EXTENDED_PROPS,
BluetoothGattCharacteristic.PERMISSION_READ_ENCRYPTED | BluetoothGattCharacteristic.PERMISSION_WRITE_ENCRYPTED);
pairingCharacteristic.addDescriptor(cccDescriptor);
pairingCharacteristic.addDescriptor(cepDescriptor);
// pairingCharacteristic.setValue(new String("0.0.0").getBytes());
service.addCharacteristic(pairingCharacteristic);
heartbeatCharacteristic = new BluetoothGattCharacteristic(UUID_hCharac,
BluetoothGattCharacteristic.PROPERTY_READ | BluetoothGattCharacteristic.PROPERTY_WRITE | BluetoothGattCharacteristic.PROPERTY_NOTIFY | BluetoothGattCharacteristic.PROPERTY_EXTENDED_PROPS,
BluetoothGattCharacteristic.PERMISSION_READ_ENCRYPTED | BluetoothGattCharacteristic.PERMISSION_WRITE_ENCRYPTED);
heartbeatCharacteristic.addDescriptor(cccDescriptor);
heartbeatCharacteristic.addDescriptor(cepDescriptor);
// heartbeatCharacteristic.setValue(new String("0.0.0").getBytes());
service.addCharacteristic(heartbeatCharacteristic);
deviceInfoCharacteristic = new BluetoothGattCharacteristic(UUID_dCharac,
BluetoothGattCharacteristic.PROPERTY_READ | BluetoothGattCharacteristic.PROPERTY_NOTIFY | BluetoothGattCharacteristic.PROPERTY_WRITE | BluetoothGattCharacteristic.PROPERTY_EXTENDED_PROPS,
BluetoothGattCharacteristic.PERMISSION_READ_ENCRYPTED | BluetoothGattCharacteristic.PERMISSION_WRITE_ENCRYPTED);
deviceInfoCharacteristic.addDescriptor(cccDescriptor);
deviceInfoCharacteristic.addDescriptor(cepDescriptor);
// deviceInfoCharacteristic.setValue(new String("0.0.0").getBytes());
service.addCharacteristic(deviceInfoCharacteristic);
readCharacteristic = new BluetoothGattCharacteristic(UUID_rCharac,
BluetoothGattCharacteristic.PROPERTY_READ | BluetoothGattCharacteristic.PROPERTY_NOTIFY | BluetoothGattCharacteristic.PROPERTY_WRITE | BluetoothGattCharacteristic.PROPERTY_EXTENDED_PROPS,
BluetoothGattCharacteristic.PERMISSION_READ_ENCRYPTED | BluetoothGattCharacteristic.PERMISSION_WRITE_ENCRYPTED);
readCharacteristic.addDescriptor(cccDescriptor);
readCharacteristic.addDescriptor(cepDescriptor);
// readCharacteristic.setValue(new String("0.0.0").getBytes());
service.addCharacteristic(readCharacteristic);
Logger.printLog(TAG, "Add service to gatt server");
writeCharacteristic = new BluetoothGattCharacteristic(UUID_wCharac,
BluetoothGattCharacteristic.PROPERTY_READ | BluetoothGattCharacteristic.PROPERTY_NOTIFY | BluetoothGattCharacteristic.PROPERTY_WRITE | BluetoothGattCharacteristic.PROPERTY_EXTENDED_PROPS,
BluetoothGattCharacteristic.PERMISSION_READ_ENCRYPTED | BluetoothGattCharacteristic.PERMISSION_WRITE_ENCRYPTED);
writeCharacteristic.addDescriptor(cccDescriptor);
writeCharacteristic.addDescriptor(cepDescriptor);
// writeCharacteristic.setValue(new String("0.0.0").getBytes());
service.addCharacteristic(writeCharacteristic);
Logger.printLog(TAG, "Add write char to gatt server");
return true == mGattServer.addService(service);
}
private final BluetoothGattServerCallback mGattServerCallback
= new BluetoothGattServerCallback() {
@Override
public void onConnectionStateChange(BluetoothDevice device, int status, int newState) {
super.onConnectionStateChange(device, status, newState);
Logger.printLog(TAG, "Our gatt server connection state changed, new state :" + Integer.toString(newState));
String intentAction;
if (status == BluetoothGatt.GATT_SUCCESS) {
if (newState == BluetoothProfile.STATE_CONNECTED) {
Logger.printLog(TAG, "Connected to GATT server.");
if (device != null) {
int type = device.getType();
mDevice = device;
Logger.printLog(TAG, "Data available to read, sending notification");
}
intentAction = ACTION_GATT_CONNECTED;
mConnectionState = STATE_CONNECTED;
broadcastUpdate(intentAction);
} else if (newState == BluetoothProfile.STATE_DISCONNECTED) {
Logger.printLog(TAG, "Disconnected from GATT server.");
intentAction = ACTION_GATT_DISCONNECTED;
mConnectionState = STATE_DISCONNECTED;
broadcastUpdate(intentAction);
}
} else {
Logger.printLog(TAG, "FAILURE STATUS: " + status);
}
if (null != mConnectionCallback && BluetoothGatt.GATT_SUCCESS == status) {
mConnectionCallback.onConnectionStateChange(device, newState);
}
}
@Override
public void onServiceAdded(int status, BluetoothGattService service) {
Logger.printLog(TAG, "Our gatt server service was added.");
super.onServiceAdded(status, service);
}
@Override
public void onCharacteristicReadRequest(BluetoothDevice device, int requestId, int offset, BluetoothGattCharacteristic characteristic) {
super.onCharacteristicReadRequest(device, requestId, offset, characteristic);
/* mGattServer.sendResponse(device, requestId, BluetoothGatt.GATT_SUCCESS, offset,
characteristic.getValue());*/
Logger.printLog(TAG, "Data read value:" + characteristic.getValue());
Logger.printLog(TAG, "Data read uuid:" + characteristic.getUuid());
if (offset != 0) {
mGattServer.sendResponse(device, requestId, BluetoothGatt.GATT_INVALID_OFFSET, offset,null);
return;
}
mGattServer.sendResponse(device, requestId, BluetoothGatt.GATT_SUCCESS, offset, characteristic.getValue());
}
@Override
public void onCharacteristicWriteRequest(BluetoothDevice device, int requestId, BluetoothGattCharacteristic characteristic, boolean preparedWrite, boolean responseNeeded, int offset, byte[] value) {
super.onCharacteristicWriteRequest(device, requestId, characteristic, preparedWrite, responseNeeded, offset, value);
final String intentAction = ACTION_DATA_AVAILABLE;
broadcastUpdate(intentAction, value);
if (responseNeeded) {
mGattServer.sendResponse(device, requestId, BluetoothGatt.GATT_SUCCESS, 0,null);
}
Logger.printLog(TAG, "We have received a write request for one of our hosted characteristics");
}
@Override
public void onNotificationSent(BluetoothDevice device, int status) {
Logger.printLog(TAG, "onNotificationSent");
super.onNotificationSent(device, status);
}
@Override
public void onDescriptorReadRequest(BluetoothDevice device, int requestId, int offset, BluetoothGattDescriptor descriptor) {
Logger.printLog(TAG, "Our gatt server descriptor was read.");
super.onDescriptorReadRequest(device, requestId, offset, descriptor);
if (offset != 0) {
mGattServer.sendResponse(device, requestId, BluetoothGatt.GATT_INVALID_OFFSET, offset,null);
return;
}
mGattServer.sendResponse(device, requestId, BluetoothGatt.GATT_SUCCESS, offset,
descriptor.getValue());
}
@Override
public void onDescriptorWriteRequest(BluetoothDevice device, int requestId, BluetoothGattDescriptor descriptor, boolean preparedWrite, boolean responseNeeded, int offset, byte[] value) {
Logger.printLog(TAG, "Our gatt server descriptor was written.");
super.onDescriptorWriteRequest(device, requestId, descriptor, preparedWrite, responseNeeded, offset, value);
if (responseNeeded) {
mGattServer.sendResponse(device, requestId, BluetoothGatt.GATT_SUCCESS,0,null);
}
}
@Override
public void onExecuteWrite(BluetoothDevice device, int requestId, boolean execute) {
Logger.printLog(TAG, "Our gatt server on execute write.");
super.onExecuteWrite(device, requestId, execute);
}
};
如果你想支持Android 6.0（Marshmallow）以上的版本，只需要在onConnectionStateChange方法中再次连接相同的设备。
if(newState == BluetoothProfile.STATE_CONNECTED) {
if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.M){
BluetoothDevice mDevice = BluetoothAdapter.getDefaultAdapter().getRemoteDevice(device.getAddress());
boolean conn = bleServer.connect(mDevice, false);
Log.i(TAG, "Connection State ---> Connected, Gatt connected result = "+conn);
}else{
Log.i(TAG, "Connection State ---> Connected");
}
}
有关详细信息，请参阅 GitHub
上提供的参考
开发了一个充当外围设备并与其他设备（仅限中央设备）连接的应用程序。
它在 OS 版本 6.0 的设备上运行良好，但在 Nougat 7.0 中出现一些问题。
我收集了一些日志，在开发者选项中启用"Bluetooth HCI snoop log"。
收集的日志：
W/bt_btm: btm_sec_disconnect : reason=19
W/bt_btif: btif_dm_generic_evt: event=33035
W/bt_btif: btif_dm_generic_evt: event=33035
W/bt_btm: btm_sec_send_hci_disconnect: handle:0x41, reason=0x13
W/bt_btif: btif_dm_generic_evt: event=33035
W/bt_btif: bta_gattc_conn_cback() - cif=3 connected=0 conn_id=3 reason=0x0016
W/bt_btif: bta_gattc_conn_cback() - cif=4 connected=0 conn_id=4 reason=0x0016
W/bt_btif: bta_gattc_conn_cback() - cif=5 connected=0 conn_id=5 reason=0x0016
W/bt_btif: bta_gattc_conn_cback() - cif=7 connected=0 conn_id=7 reason=0x0016
W/bt_btif: bta_dm_bl_change_cback : reason=22
W/bt_btif: bta_dm_bl_change_cback : reason=22
W/bt_btm: btm_sec_disconnected
W/bt_btif: conn.link_down.is_removed : 0
D/BtGatt.GattService: onClientConnected() serverIf: 6, connId=6, address=00:16:A4:13:1E:48, connected=false
W/bt_btif: btif_dm_upstreams_cback ev: BTA_DM_LINK_DOWN_EVT
W/bt_btif: BTA_DM_LINK_DOWN_EVT. Sending BT_ACL_STATE_DISCONNECTED
外围服务（代码）：
private boolean addService() {
if (null == mGattServer) {
Logger.printLog(TAG, "mGattServer is null");
return false;
}
BluetoothGattService service = new BluetoothGattService(UUID_pService,
BluetoothGattService.SERVICE_TYPE_PRIMARY);
//Defined descriptor for CCC and CEP
final BluetoothGattDescriptor cccDescriptor = new BluetoothGattDescriptor(UUID.fromString("00002902-0000-1000-8000-00805f9b34fb"), BluetoothGattDescriptor.PERMISSION_READ_ENCRYPTED);
cccDescriptor.setValue(BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE);
final BluetoothGattDescriptor cepDescriptor = new BluetoothGattDescriptor(UUID.fromString("00002900-0000-1000-8000-00805f9b34fb"), BluetoothGattDescriptor.PERMISSION_READ_ENCRYPTED);
cepDescriptor.setValue(BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE);
pairingCharacteristic = new BluetoothGattCharacteristic(UUID_pCharac,
BluetoothGattCharacteristic.PROPERTY_READ | BluetoothGattCharacteristic.PROPERTY_NOTIFY | BluetoothGattCharacteristic.PROPERTY_WRITE | BluetoothGattCharacteristic.PROPERTY_EXTENDED_PROPS,
BluetoothGattCharacteristic.PERMISSION_READ_ENCRYPTED | BluetoothGattCharacteristic.PERMISSION_WRITE_ENCRYPTED);
pairingCharacteristic.addDescriptor(cccDescriptor);
pairingCharacteristic.addDescriptor(cepDescriptor);
// pairingCharacteristic.setValue(new String("0.0.0").getBytes());
service.addCharacteristic(pairingCharacteristic);
heartbeatCharacteristic = new BluetoothGattCharacteristic(UUID_hCharac,
BluetoothGattCharacteristic.PROPERTY_READ | BluetoothGattCharacteristic.PROPERTY_WRITE | BluetoothGattCharacteristic.PROPERTY_NOTIFY | BluetoothGattCharacteristic.PROPERTY_EXTENDED_PROPS,
BluetoothGattCharacteristic.PERMISSION_READ_ENCRYPTED | BluetoothGattCharacteristic.PERMISSION_WRITE_ENCRYPTED);
heartbeatCharacteristic.addDescriptor(cccDescriptor);
heartbeatCharacteristic.addDescriptor(cepDescriptor);
// heartbeatCharacteristic.setValue(new String("0.0.0").getBytes());
service.addCharacteristic(heartbeatCharacteristic);
deviceInfoCharacteristic = new BluetoothGattCharacteristic(UUID_dCharac,
BluetoothGattCharacteristic.PROPERTY_READ | BluetoothGattCharacteristic.PROPERTY_NOTIFY | BluetoothGattCharacteristic.PROPERTY_WRITE | BluetoothGattCharacteristic.PROPERTY_EXTENDED_PROPS,
BluetoothGattCharacteristic.PERMISSION_READ_ENCRYPTED | BluetoothGattCharacteristic.PERMISSION_WRITE_ENCRYPTED);
deviceInfoCharacteristic.addDescriptor(cccDescriptor);
deviceInfoCharacteristic.addDescriptor(cepDescriptor);
// deviceInfoCharacteristic.setValue(new String("0.0.0").getBytes());
service.addCharacteristic(deviceInfoCharacteristic);
readCharacteristic = new BluetoothGattCharacteristic(UUID_rCharac,
BluetoothGattCharacteristic.PROPERTY_READ | BluetoothGattCharacteristic.PROPERTY_NOTIFY | BluetoothGattCharacteristic.PROPERTY_WRITE | BluetoothGattCharacteristic.PROPERTY_EXTENDED_PROPS,
BluetoothGattCharacteristic.PERMISSION_READ_ENCRYPTED | BluetoothGattCharacteristic.PERMISSION_WRITE_ENCRYPTED);
readCharacteristic.addDescriptor(cccDescriptor);
readCharacteristic.addDescriptor(cepDescriptor);
// readCharacteristic.setValue(new String("0.0.0").getBytes());
service.addCharacteristic(readCharacteristic);
Logger.printLog(TAG, "Add service to gatt server");
writeCharacteristic = new BluetoothGattCharacteristic(UUID_wCharac,
BluetoothGattCharacteristic.PROPERTY_READ | BluetoothGattCharacteristic.PROPERTY_NOTIFY | BluetoothGattCharacteristic.PROPERTY_WRITE | BluetoothGattCharacteristic.PROPERTY_EXTENDED_PROPS,
BluetoothGattCharacteristic.PERMISSION_READ_ENCRYPTED | BluetoothGattCharacteristic.PERMISSION_WRITE_ENCRYPTED);
writeCharacteristic.addDescriptor(cccDescriptor);
writeCharacteristic.addDescriptor(cepDescriptor);
// writeCharacteristic.setValue(new String("0.0.0").getBytes());
service.addCharacteristic(writeCharacteristic);
Logger.printLog(TAG, "Add write char to gatt server");
return true == mGattServer.addService(service);
}
private final BluetoothGattServerCallback mGattServerCallback
= new BluetoothGattServerCallback() {
@Override
public void onConnectionStateChange(BluetoothDevice device, int status, int newState) {
super.onConnectionStateChange(device, status, newState);
Logger.printLog(TAG, "Our gatt server connection state changed, new state :" + Integer.toString(newState));
String intentAction;
if (status == BluetoothGatt.GATT_SUCCESS) {
if (newState == BluetoothProfile.STATE_CONNECTED) {
Logger.printLog(TAG, "Connected to GATT server.");
if (device != null) {
int type = device.getType();
mDevice = device;
Logger.printLog(TAG, "Data available to read, sending notification");
}
intentAction = ACTION_GATT_CONNECTED;
mConnectionState = STATE_CONNECTED;
broadcastUpdate(intentAction);
} else if (newState == BluetoothProfile.STATE_DISCONNECTED) {
Logger.printLog(TAG, "Disconnected from GATT server.");
intentAction = ACTION_GATT_DISCONNECTED;
mConnectionState = STATE_DISCONNECTED;
broadcastUpdate(intentAction);
}
} else {
Logger.printLog(TAG, "FAILURE STATUS: " + status);
}
if (null != mConnectionCallback && BluetoothGatt.GATT_SUCCESS == status) {
mConnectionCallback.onConnectionStateChange(device, newState);
}
}
@Override
public void onServiceAdded(int status, BluetoothGattService service) {
Logger.printLog(TAG, "Our gatt server service was added.");
super.onServiceAdded(status, service);
}
@Override
public void onCharacteristicReadRequest(BluetoothDevice device, int requestId, int offset, BluetoothGattCharacteristic characteristic) {
super.onCharacteristicReadRequest(device, requestId, offset, characteristic);
/* mGattServer.sendResponse(device, requestId, BluetoothGatt.GATT_SUCCESS, offset,
characteristic.getValue());*/
Logger.printLog(TAG, "Data read value:" + characteristic.getValue());
Logger.printLog(TAG, "Data read uuid:" + characteristic.getUuid());
if (offset != 0) {
mGattServer.sendResponse(device, requestId, BluetoothGatt.GATT_INVALID_OFFSET, offset,null);
return;
}
mGattServer.sendResponse(device, requestId, BluetoothGatt.GATT_SUCCESS, offset, characteristic.getValue());
}
@Override
public void onCharacteristicWriteRequest(BluetoothDevice device, int requestId, BluetoothGattCharacteristic characteristic, boolean preparedWrite, boolean responseNeeded, int offset, byte[] value) {
super.onCharacteristicWriteRequest(device, requestId, characteristic, preparedWrite, responseNeeded, offset, value);
final String intentAction = ACTION_DATA_AVAILABLE;
broadcastUpdate(intentAction, value);
if (responseNeeded) {
mGattServer.sendResponse(device, requestId, BluetoothGatt.GATT_SUCCESS, 0,null);
}
Logger.printLog(TAG, "We have received a write request for one of our hosted characteristics");
}
@Override
public void onNotificationSent(BluetoothDevice device, int status) {
Logger.printLog(TAG, "onNotificationSent");
super.onNotificationSent(device, status);
}
@Override
public void onDescriptorReadRequest(BluetoothDevice device, int requestId, int offset, BluetoothGattDescriptor descriptor) {
Logger.printLog(TAG, "Our gatt server descriptor was read.");
super.onDescriptorReadRequest(device, requestId, offset, descriptor);
if (offset != 0) {
mGattServer.sendResponse(device, requestId, BluetoothGatt.GATT_INVALID_OFFSET, offset,null);
return;
}
mGattServer.sendResponse(device, requestId, BluetoothGatt.GATT_SUCCESS, offset,
descriptor.getValue());
}
@Override
public void onDescriptorWriteRequest(BluetoothDevice device, int requestId, BluetoothGattDescriptor descriptor, boolean preparedWrite, boolean responseNeeded, int offset, byte[] value) {
Logger.printLog(TAG, "Our gatt server descriptor was written.");
super.onDescriptorWriteRequest(device, requestId, descriptor, preparedWrite, responseNeeded, offset, value);
if (responseNeeded) {
mGattServer.sendResponse(device, requestId, BluetoothGatt.GATT_SUCCESS,0,null);
}
}
@Override
public void onExecuteWrite(BluetoothDevice device, int requestId, boolean execute) {
Logger.printLog(TAG, "Our gatt server on execute write.");
super.onExecuteWrite(device, requestId, execute);
}
};
如果你想支持Android 6.0（Marshmallow）以上的版本，只需要在onConnectionStateChange方法中再次连接相同的设备。
if(newState == BluetoothProfile.STATE_CONNECTED) {
if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.M){
BluetoothDevice mDevice = BluetoothAdapter.getDefaultAdapter().getRemoteDevice(device.getAddress());
boolean conn = bleServer.connect(mDevice, false);
Log.i(TAG, "Connection State ---> Connected, Gatt connected result = "+conn);
}else{
Log.i(TAG, "Connection State ---> Connected");
}
}
有关详细信息，请参阅 GitHub
上提供的参考