Example usage for android.bluetooth BluetoothGattServerCallback BluetoothGattServerCallback

Introduction

In this page you can find the example usage for android.bluetooth BluetoothGattServerCallback BluetoothGattServerCallback.

Prototype

BluetoothGattServerCallback

Source Link

Usage

From source file:io.v.android.libs.discovery.ble.BlePlugin.java

public BlePlugin(Context androidContext) {
    this.androidContext = androidContext;
    cachedDevices = new DeviceCache(Duration.standardMinutes(1));
    BluetoothAdapter bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
    if (bluetoothAdapter == null || !bluetoothAdapter.isEnabled()) {
        return;/*w w w .java2  s .  c o  m*/
    }

    if (!hasPermission(Manifest.permission.ACCESS_COARSE_LOCATION)
            && !hasPermission(Manifest.permission.ACCESS_FINE_LOCATION)) {
        return;
    }
    isEnabled = true;
    bluetoothLeAdvertise = BluetoothAdapter.getDefaultAdapter().getBluetoothLeAdvertiser();
    bluetoothLeScanner = BluetoothAdapter.getDefaultAdapter().getBluetoothLeScanner();
    BluetoothManager manager = (BluetoothManager) androidContext.getSystemService(Context.BLUETOOTH_SERVICE);
    bluetoothGattServer = manager.openGattServer(androidContext, new BluetoothGattServerCallback() {
        @Override
        public void onConnectionStateChange(BluetoothDevice device, int status, int newState) {
            super.onConnectionStateChange(device, status, newState);
        }

        @Override
        public void onCharacteristicReadRequest(BluetoothDevice device, int requestId, int offset,
                BluetoothGattCharacteristic characteristic) {
            super.onCharacteristicReadRequest(device, requestId, offset, characteristic);
            byte[] total = characteristic.getValue();
            byte[] res = {};
            // Only send MTU - 1 bytes. The first byte of all packets is the op code.
            if (offset < total.length) {
                int finalByte = offset + MTU - 1;
                if (finalByte > total.length) {
                    finalByte = total.length;
                }
                res = Arrays.copyOfRange(total, offset, finalByte);
                bluetoothGattServer.sendResponse(device, requestId, BluetoothGatt.GATT_SUCCESS, 0, res);
            } else {
                // This should probably be an error, but a bug in the paypal/gatt code causes an
                // infinite loop if this returns an error rather than the empty value.
                bluetoothGattServer.sendResponse(device, requestId, BluetoothGatt.GATT_SUCCESS, 0, res);
            }
        }
    });
}

---

From source file:com.android.car.trust.CarBleTrustAgent.java

private void maybeStartBleUnlockService() {
    if (Log.isLoggable(TAG, Log.DEBUG)) {
        Log.d(TAG, "Trying to open a Ble GATT server");
    }/*from ww w.  j av  a  2  s .c om*/

    BluetoothManager btManager = (BluetoothManager) getSystemService(Context.BLUETOOTH_SERVICE);
    BluetoothGattServer mGattServer = btManager.openGattServer(this, new BluetoothGattServerCallback() {
        @Override
        public void onConnectionStateChange(BluetoothDevice device, int status, int newState) {
            super.onConnectionStateChange(device, status, newState);
        }
    });

    // The BLE stack is started up before the trust agent service, however Gatt capabilities
    // might not be ready just yet. Keep trying until a GattServer can open up before proceeding
    // to start the rest of the BLE services.
    if (mGattServer == null) {
        Log.e(TAG, "Gatt not available, will try again...in " + BLE_RETRY_MS + "ms");

        Handler handler = new Handler();
        handler.postDelayed(new Runnable() {
            @Override
            public void run() {
                maybeStartBleUnlockService();
            }
        }, BLE_RETRY_MS);
    } else {
        mGattServer.close();
        if (Log.isLoggable(TAG, Log.DEBUG)) {
            Log.d(TAG, "GATT available, starting up UnlockService");
        }
        mCarUnlockService.start();
    }
}

---