List of usage examples for android.bluetooth BluetoothGattCharacteristic getDescriptors
public List<BluetoothGattDescriptor> getDescriptors()
From source file:com.wolkabout.hexiwear.service.BluetoothService.java
private void createGATT(final BluetoothDevice device) { bluetoothGatt = device.connectGatt(this, true, new BluetoothGattCallback() { @Override/* ww w . j a v a 2 s . c o m*/ public void onConnectionStateChange(BluetoothGatt gatt, int status, int newState) { isConnected = BluetoothProfile.STATE_CONNECTED == newState; if (isConnected) { Log.i(TAG, "GATT connected."); startForeground(442, getNotification(device)); gatt.discoverServices(); } else { Log.i(TAG, "GATT disconnected."); NotificationService_.intent(BluetoothService.this).stop(); notificationManager.notify(442, getNotification(device)); gatt.connect(); } final Intent connectionStateChanged = new Intent(CONNECTION_STATE_CHANGED); connectionStateChanged.putExtra(CONNECTION_STATE, isConnected); sendBroadcast(connectionStateChanged); } @Override public void onServicesDiscovered(BluetoothGatt gatt, int status) { Log.i(TAG, "Services discovered."); if (status == BluetoothGatt.GATT_INSUFFICIENT_AUTHENTICATION) { handleAuthenticationError(gatt); return; } discoverCharacteristics(gatt); } @Override public void onCharacteristicWrite(BluetoothGatt gatt, BluetoothGattCharacteristic characteristic, int status) { Log.i(TAG, "Characteristic written: " + status); if (status == BluetoothGatt.GATT_INSUFFICIENT_AUTHENTICATION) { handleAuthenticationError(gatt); return; } final byte command = characteristic.getValue()[0]; switch (command) { case WRITE_TIME: Log.i(TAG, "Time written."); final BluetoothGattCharacteristic batteryCharacteristic = readableCharacteristics .get(Characteristic.BATTERY.getUuid()); gatt.setCharacteristicNotification(batteryCharacteristic, true); for (BluetoothGattDescriptor descriptor : batteryCharacteristic.getDescriptors()) { if (descriptor.getUuid().toString().startsWith("00002904")) { descriptor.setValue(BluetoothGattDescriptor.ENABLE_INDICATION_VALUE); gatt.writeDescriptor(descriptor); } } break; case WRITE_NOTIFICATION: Log.i(TAG, "Notification sent."); if (notificationsQueue.isEmpty()) { Log.i(TAG, "Reading characteristics..."); readNextCharacteristics(gatt); } else { Log.i(TAG, "writing next notification..."); alertIn.setValue(notificationsQueue.poll()); gatt.writeCharacteristic(alertIn); } break; default: Log.w(TAG, "No such ALERT IN command: " + command); break; } } @Override public void onDescriptorWrite(BluetoothGatt gatt, BluetoothGattDescriptor descriptor, int status) { readCharacteristic(gatt, Characteristic.MANUFACTURER); } @Override public void onCharacteristicRead(BluetoothGatt gatt, final BluetoothGattCharacteristic gattCharacteristic, int status) { if (status == BluetoothGatt.GATT_INSUFFICIENT_AUTHENTICATION) { handleAuthenticationError(gatt); return; } final String characteristicUuid = gattCharacteristic.getUuid().toString(); final Characteristic characteristic = Characteristic.byUuid(characteristicUuid); switch (characteristic) { case MANUFACTURER: manufacturerInfo.manufacturer = gattCharacteristic.getStringValue(0); readCharacteristic(gatt, Characteristic.FW_REVISION); break; case FW_REVISION: manufacturerInfo.firmwareRevision = gattCharacteristic.getStringValue(0); readCharacteristic(gatt, Characteristic.MODE); break; default: Log.v(TAG, "Characteristic read: " + characteristic.name()); if (characteristic == Characteristic.MODE) { final Mode newMode = Mode.bySymbol(gattCharacteristic.getValue()[0]); if (mode != newMode) { onModeChanged(newMode); } } else { onBluetoothDataReceived(characteristic, gattCharacteristic.getValue()); } if (notificationsQueue.isEmpty()) { readNextCharacteristics(gatt); } else { alertIn.setValue(notificationsQueue.poll()); gatt.writeCharacteristic(alertIn); } break; } } @Override public void onCharacteristicChanged(BluetoothGatt gatt, BluetoothGattCharacteristic gattCharacteristic) { final String characteristicUuid = gattCharacteristic.getUuid().toString(); final Characteristic characteristic = Characteristic.byUuid(characteristicUuid); Log.d(TAG, "Characteristic changed: " + characteristic); if (characteristic == Characteristic.BATTERY) { onBluetoothDataReceived(Characteristic.BATTERY, gattCharacteristic.getValue()); } } }); }
From source file:com.example.android.bluetoothlegatt.BluetoothLeService.java
/** * Enables or disables notification on a give characteristic. * * @param characteristic Characteristic to act on. * @param enabled If true, enable notification. False otherwise. *///from w w w. ja va 2 s . co m public void setCharacteristicNotification(BluetoothGattCharacteristic characteristic, boolean enabled) { if (mBluetoothAdapter == null || mBluetoothGatt == null) { Log.w(TAG, "BluetoothAdapter not initialized"); return; } if (!mBluetoothGatt.setCharacteristicNotification(characteristic, enabled)) { Log.e(TAG, "setCharacteristicNotification fail! enabled=" + enabled); } if ((UUID.fromString("0000fff4-0000-1000-8000-00805f9b34fb")).equals(characteristic.getUuid())) { //mBluetoothGatt.writeCharacteristic(characteristic); List<BluetoothGattDescriptor> descs = characteristic.getDescriptors(); for (int i = 0; i < descs.size(); i++) { BluetoothGattDescriptor desc = descs.get(i); desc.setValue(BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE); Log.d(TAG, "writeDescriptor notify, uuid=" + desc.getUuid().toString()); mBluetoothGatt.writeDescriptor(desc); } //BluetoothGattDescriptor descriptor = characteristic.getDescriptor(UUID.fromString("00002902-0000-1000-8000-00805f9b34fb")); //descriptor.setValue(BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE); //mBluetoothGatt.writeDescriptor(descriptor); } // This is specific to Heart Rate Measurement. if (UUID_HEART_RATE_MEASUREMENT.equals(characteristic.getUuid())) { BluetoothGattDescriptor descriptor = characteristic .getDescriptor(UUID.fromString(SampleGattAttributes.CLIENT_CHARACTERISTIC_CONFIG)); descriptor.setValue(BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE); mBluetoothGatt.writeDescriptor(descriptor); } }
From source file:com.megster.cordova.ble.central.Peripheral.java
public JSONObject asJSONObject(BluetoothGatt gatt) { JSONObject json = asJSONObject();/* ww w . j a va2 s . co m*/ try { JSONArray servicesArray = new JSONArray(); JSONArray characteristicsArray = new JSONArray(); json.put("services", servicesArray); json.put("characteristics", characteristicsArray); if (connected && gatt != null) { for (BluetoothGattService service : gatt.getServices()) { servicesArray.put(UUIDHelper.uuidToString(service.getUuid())); for (BluetoothGattCharacteristic characteristic : service.getCharacteristics()) { JSONObject characteristicsJSON = new JSONObject(); characteristicsArray.put(characteristicsJSON); characteristicsJSON.put("service", UUIDHelper.uuidToString(service.getUuid())); characteristicsJSON.put("characteristic", UUIDHelper.uuidToString(characteristic.getUuid())); //characteristicsJSON.put("instanceId", characteristic.getInstanceId()); characteristicsJSON.put("properties", Helper.decodeProperties(characteristic)); // characteristicsJSON.put("propertiesValue", characteristic.getProperties()); if (characteristic.getPermissions() > 0) { characteristicsJSON.put("permissions", Helper.decodePermissions(characteristic)); // characteristicsJSON.put("permissionsValue", characteristic.getPermissions()); } JSONArray descriptorsArray = new JSONArray(); for (BluetoothGattDescriptor descriptor : characteristic.getDescriptors()) { JSONObject descriptorJSON = new JSONObject(); descriptorJSON.put("uuid", UUIDHelper.uuidToString(descriptor.getUuid())); descriptorJSON.put("value", descriptor.getValue()); // always blank if (descriptor.getPermissions() > 0) { descriptorJSON.put("permissions", Helper.decodePermissions(descriptor)); // descriptorJSON.put("permissionsValue", descriptor.getPermissions()); } descriptorsArray.put(descriptorJSON); } if (descriptorsArray.length() > 0) { characteristicsJSON.put("descriptors", descriptorsArray); } } } } } catch (JSONException e) { // TODO better error handling e.printStackTrace(); } return json; }