/**
* sendMessage will send a message represented as a String, over the BLE if server was
* successfully started and client has connected.
*
* @param msg message to be sent
*/
public void sendMessage(String msg) {
if (mConnectedDevice != null) {
BluetoothGattCharacteristic characteristic =
ServiceFactory.generateService()
.getCharacteristic(UUID.fromString(Constants.CHAT_CHARACTERISTIC_UUID));
characteristic.setValue(msg);
mGattserver.notifyCharacteristicChanged(mConnectedDevice, characteristic, false);
}
}
public void createServer() {
server = bluetoothManager.openGattServer(activity, new Callback());
service =
new BluetoothGattService(
UUID.fromString(B4UUID), BluetoothGattService.SERVICE_TYPE_SECONDARY);
server.addService(service);
System.out.println("server: " + server);
}
/**
* startAdvertising will open a Gatt server, add our chat services to it and start advertisement
* with default settings. Advertising won't start if bluetooth is disabled or device doesn't
* support the Peripheral mode.
*/
public void startAdvertising() {
if (mBluetoothManager.getAdapter().isEnabled()) {
if (mBluetoothManager.getAdapter().isMultipleAdvertisementSupported()) {
mGattserver =
mBluetoothManager.openGattServer(
mContext,
new BluetoothGattServerCallback() {
@Override
public void onConnectionStateChange(
BluetoothDevice device, int status, int newState) {
super.onConnectionStateChange(device, status, newState);
if (newState == BluetoothProfile.STATE_CONNECTED) {
if (mLogger != null) {
mLogger.log("Client connected: " + device.getAddress());
}
mConnectedDevice = device;
} else if (newState == BluetoothProfile.STATE_DISCONNECTED) {
if (mLogger != null) {
mLogger.log("Client disconnected: " + device.getAddress());
}
mConnectedDevice = null;
}
}
@Override
public void onCharacteristicReadRequest(
BluetoothDevice device,
int requestId,
int offset,
BluetoothGattCharacteristic characteristic) {
super.onCharacteristicReadRequest(device, requestId, offset, characteristic);
if (mLogger != null) {
mLogger.log("onCharacteristicReadRequest");
}
}
@Override
public void onServiceAdded(int status, BluetoothGattService service) {
super.onServiceAdded(status, service);
BleAdvertiser.this.onServiceAdded();
}
@Override
public void onNotificationSent(BluetoothDevice device, int status) {
super.onNotificationSent(device, status);
if (mLogger != null) {
mLogger.log("onNotificationSent");
}
}
@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);
if (characteristic
.getUuid()
.equals(UUID.fromString(Constants.CHAT_CHARACTERISTIC_UUID))) {
String msg = "";
if (value != null) {
msg = new String(value);
}
mLogger.log("onCharacteristicWriteRequest: " + msg);
}
}
});
mGattserver.addService(ServiceFactory.generateService());
} else {
mLogger.log("Central mode not supported by the device!");
}
} else {
mLogger.log("Bluetooth is disabled!");
}
}
/**
* destroy will close the gatt server if it was opened. Method should be called once we're done
* with the BLE communication, to clear up the resources.
*/
public void destroy() {
if (mGattserver != null) {
mGattserver.clearServices();
mGattserver.close();
}
}