Java tutorial
/* * Copyright (C) 2013 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package undot.safedrivers.BLE; import android.app.Activity; import android.app.AlertDialog; import android.app.NotificationManager; import android.app.Service; import android.bluetooth.BluetoothAdapter; import android.bluetooth.BluetoothDevice; import android.bluetooth.BluetoothGatt; import android.bluetooth.BluetoothGattCallback; import android.bluetooth.BluetoothGattCharacteristic; import android.bluetooth.BluetoothGattDescriptor; import android.bluetooth.BluetoothGattService; import android.bluetooth.BluetoothManager; import android.bluetooth.BluetoothProfile; import android.content.Context; import android.content.Intent; import android.os.Binder; import android.os.Handler; import android.os.IBinder; import android.os.Vibrator; import android.support.v4.app.NotificationCompat; import android.util.Log; import android.widget.Toast; import java.io.UnsupportedEncodingException; import java.util.ArrayList; import java.util.List; import undot.safedrivers.R; /** * Service for managing connection and data communication with a GATT server hosted on a * given Bluetooth LE device. */ public class BluetoothLeService extends Service { private final static String TAG = BluetoothLeService.class.getSimpleName(); private static BluetoothGattCharacteristic mSCharacteristic, mModelNumberCharacteristic, mSerialPortCharacteristic, mCommandCharacteristic; BluetoothLeService mBluetoothLeService; private ArrayList<ArrayList<BluetoothGattCharacteristic>> mGattCharacteristics = new ArrayList<ArrayList<BluetoothGattCharacteristic>>(); private boolean mScanning = false; AlertDialog mScanDeviceDialog; private String mDeviceName; private String mDeviceAddress; public enum connectionStateEnum { isNull, isScanning, isToScan, isConnecting, isConnected, isDisconnecting }; private static final int REQUEST_ENABLE_BT = 1; private Handler mHandler = new Handler(); public boolean mConnected = false; private int mBaudrate = 115200; //set the default baud rate to 115200 private String mPassword = "AT+PASSWOR=DFRobot\r\n"; private String mBaudrateBuffer = "AT+CURRUART=" + mBaudrate + "\r\n"; boolean notified = false; public static final String SerialPortUUID = "0000dfb1-0000-1000-8000-00805f9b34fb"; public static final String CommandUUID = "0000dfb2-0000-1000-8000-00805f9b34fb"; public static final String ModelNumberStringUUID = "00002a24-0000-1000-8000-00805f9b34fb"; int rssi_value = 0; int sensor_value_sum = 0; int sensor_counter = 0; int sensor_value = 0; int rssicounter = 0; private BluetoothManager mBluetoothManager; private BluetoothAdapter mBluetoothAdapter; public static BluetoothGatt mBluetoothGatt; public String mBluetoothDeviceAddress; private static final int STATE_DISCONNECTED = 0; private static final int STATE_CONNECTING = 1; private static final int STATE_CONNECTED = 2; public int mConnectionState = STATE_DISCONNECTED; //To tell the onCharacteristicWrite call back function that this is a new characteristic, //not the Write Characteristic to the device successfully. private static final int WRITE_NEW_CHARACTERISTIC = -1; //define the limited length of the characteristic. private static final int MAX_CHARACTERISTIC_LENGTH = 17; //Show that Characteristic is writing or not. private boolean mIsWritingCharacteristic = false; //class to store the Characteristic and content string push into the ring buffer. private class BluetoothGattCharacteristicHelper { BluetoothGattCharacteristic mCharacteristic; String mCharacteristicValue; BluetoothGattCharacteristicHelper(BluetoothGattCharacteristic characteristic, String characteristicValue) { mCharacteristic = characteristic; mCharacteristicValue = characteristicValue; } } //ring buffer private RingBuffer<BluetoothGattCharacteristicHelper> mCharacteristicRingBuffer = new RingBuffer<BluetoothGattCharacteristicHelper>( 8); public final static String ACTION_GATT_CONNECTED = "com.example.bluetooth.le.ACTION_GATT_CONNECTED"; public final static String ACTION_GATT_DISCONNECTED = "com.example.bluetooth.le.ACTION_GATT_DISCONNECTED"; public final static String ACTION_GATT_SERVICES_DISCOVERED = "com.example.bluetooth.le.ACTION_GATT_SERVICES_DISCOVERED"; public final static String ACTION_DATA_AVAILABLE = "com.example.bluetooth.le.ACTION_DATA_AVAILABLE"; public final static String EXTRA_DATA = "com.example.bluetooth.le.EXTRA_DATA"; // public final static UUID UUID_HEART_RATE_MEASUREMENT = // UUID.fromString(SampleGattAttributes.HEART_RATE_MEASUREMENT); @Override public void onCreate() { super.onCreate(); initialize(); } // Implements callback methods for GATT events that the app cares about. For example, // connection change and services discovered. private final BluetoothGattCallback mGattCallback = new BluetoothGattCallback() { @Override public void onConnectionStateChange(BluetoothGatt gatt, int status, int newState) { String intentAction; System.out.println("BluetoothGattCallback----onConnectionStateChange" + newState); if (newState == BluetoothProfile.STATE_CONNECTED) { intentAction = ACTION_GATT_CONNECTED; mConnectionState = STATE_CONNECTED; broadcastUpdate(intentAction); Log.i(TAG, "Connected to GATT server."); mBluetoothAdapter.stopLeScan(mLeScanCallback); // Attempts to discover services after successful connection. if (mBluetoothGatt.discoverServices()) { Log.i(TAG, "Attempting to start service discovery:"); } else { Log.i(TAG, "Attempting to start service discovery:not success"); } } else if (newState == BluetoothProfile.STATE_DISCONNECTED) { intentAction = ACTION_GATT_DISCONNECTED; mConnectionState = STATE_DISCONNECTED; Log.i(TAG, "Disconnected from GATT server."); broadcastUpdate(intentAction); } } @Override public void onReadRemoteRssi(BluetoothGatt gatt, int rssi, int status) { super.onReadRemoteRssi(gatt, rssi, status); Log.d("rssionremote", rssi + ""); if (rssi < -90) { // rssi_value = rssi; rssicounter++; } //broadcastUpdate(rssi); } @Override public void onServicesDiscovered(BluetoothGatt gatt, int status) { System.out.println("onServicesDiscovered " + status); if (status == BluetoothGatt.GATT_SUCCESS) { broadcastUpdate(ACTION_GATT_SERVICES_DISCOVERED); for (BluetoothGattService gattService : getSupportedGattServices()) { System.out.println("ACTION_GATT_SERVICES_DISCOVERED " + gattService.getUuid().toString()); } getGattServices(getSupportedGattServices()); } else { Log.w(TAG, "onServicesDiscovered received: " + status); } } @Override public void onCharacteristicWrite(BluetoothGatt gatt, BluetoothGattCharacteristic characteristic, int status) { //this block should be synchronized to prevent the function overloading synchronized (this) { //CharacteristicWrite success if (status == BluetoothGatt.GATT_SUCCESS) { System.out.println("onCharacteristicWrite success:" + new String(characteristic.getValue())); if (mCharacteristicRingBuffer.isEmpty()) { mIsWritingCharacteristic = false; } else { BluetoothGattCharacteristicHelper bluetoothGattCharacteristicHelper = mCharacteristicRingBuffer .next(); if (bluetoothGattCharacteristicHelper.mCharacteristicValue .length() > MAX_CHARACTERISTIC_LENGTH) { try { bluetoothGattCharacteristicHelper.mCharacteristic .setValue(bluetoothGattCharacteristicHelper.mCharacteristicValue .substring(0, MAX_CHARACTERISTIC_LENGTH).getBytes("ISO-8859-1")); } catch (UnsupportedEncodingException e) { // this should never happen because "US-ASCII" is hard-coded. throw new IllegalStateException(e); } if (mBluetoothGatt .writeCharacteristic(bluetoothGattCharacteristicHelper.mCharacteristic)) { System.out.println("writeCharacteristic init " + new String(bluetoothGattCharacteristicHelper.mCharacteristic.getValue()) + ":success"); } else { System.out.println("writeCharacteristic init " + new String(bluetoothGattCharacteristicHelper.mCharacteristic.getValue()) + ":failure"); } bluetoothGattCharacteristicHelper.mCharacteristicValue = bluetoothGattCharacteristicHelper.mCharacteristicValue .substring(MAX_CHARACTERISTIC_LENGTH); } else { try { bluetoothGattCharacteristicHelper.mCharacteristic .setValue(bluetoothGattCharacteristicHelper.mCharacteristicValue .getBytes("ISO-8859-1")); } catch (UnsupportedEncodingException e) { // this should never happen because "US-ASCII" is hard-coded. throw new IllegalStateException(e); } if (mBluetoothGatt .writeCharacteristic(bluetoothGattCharacteristicHelper.mCharacteristic)) { System.out.println("writeCharacteristic init " + new String(bluetoothGattCharacteristicHelper.mCharacteristic.getValue()) + ":success"); } else { System.out.println("writeCharacteristic init " + new String(bluetoothGattCharacteristicHelper.mCharacteristic.getValue()) + ":failure"); } bluetoothGattCharacteristicHelper.mCharacteristicValue = ""; // System.out.print("before pop:"); // System.out.println(mCharacteristicRingBuffer.size()); mCharacteristicRingBuffer.pop(); // System.out.print("after pop:"); // System.out.println(mCharacteristicRingBuffer.size()); } } } //WRITE a NEW CHARACTERISTIC else if (status == WRITE_NEW_CHARACTERISTIC) { if ((!mCharacteristicRingBuffer.isEmpty()) && mIsWritingCharacteristic == false) { BluetoothGattCharacteristicHelper bluetoothGattCharacteristicHelper = mCharacteristicRingBuffer .next(); if (bluetoothGattCharacteristicHelper.mCharacteristicValue .length() > MAX_CHARACTERISTIC_LENGTH) { try { bluetoothGattCharacteristicHelper.mCharacteristic .setValue(bluetoothGattCharacteristicHelper.mCharacteristicValue .substring(0, MAX_CHARACTERISTIC_LENGTH).getBytes("ISO-8859-1")); } catch (UnsupportedEncodingException e) { // this should never happen because "US-ASCII" is hard-coded. throw new IllegalStateException(e); } if (mBluetoothGatt .writeCharacteristic(bluetoothGattCharacteristicHelper.mCharacteristic)) { System.out.println("writeCharacteristic init " + new String(bluetoothGattCharacteristicHelper.mCharacteristic.getValue()) + ":success"); } else { System.out.println("writeCharacteristic init " + new String(bluetoothGattCharacteristicHelper.mCharacteristic.getValue()) + ":failure"); } bluetoothGattCharacteristicHelper.mCharacteristicValue = bluetoothGattCharacteristicHelper.mCharacteristicValue .substring(MAX_CHARACTERISTIC_LENGTH); } else { try { bluetoothGattCharacteristicHelper.mCharacteristic .setValue(bluetoothGattCharacteristicHelper.mCharacteristicValue .getBytes("ISO-8859-1")); } catch (UnsupportedEncodingException e) { // this should never happen because "US-ASCII" is hard-coded. throw new IllegalStateException(e); } if (mBluetoothGatt .writeCharacteristic(bluetoothGattCharacteristicHelper.mCharacteristic)) { System.out.println("writeCharacteristic init " + new String(bluetoothGattCharacteristicHelper.mCharacteristic.getValue()) + ":success"); // System.out.println((byte)bluetoothGattCharacteristicHelper.mCharacteristic.getValue()[0]); // System.out.println((byte)bluetoothGattCharacteristicHelper.mCharacteristic.getValue()[1]); // System.out.println((byte)bluetoothGattCharacteristicHelper.mCharacteristic.getValue()[2]); // System.out.println((byte)bluetoothGattCharacteristicHelper.mCharacteristic.getValue()[3]); // System.out.println((byte)bluetoothGattCharacteristicHelper.mCharacteristic.getValue()[4]); // System.out.println((byte)bluetoothGattCharacteristicHelper.mCharacteristic.getValue()[5]); } else { System.out.println("writeCharacteristic init " + new String(bluetoothGattCharacteristicHelper.mCharacteristic.getValue()) + ":failure"); } bluetoothGattCharacteristicHelper.mCharacteristicValue = ""; // System.out.print("before pop:"); // System.out.println(mCharacteristicRingBuffer.size()); mCharacteristicRingBuffer.pop(); // System.out.print("after pop:"); // System.out.println(mCharacteristicRingBuffer.size()); } } mIsWritingCharacteristic = true; //clear the buffer to prevent the lock of the mIsWritingCharacteristic if (mCharacteristicRingBuffer.isFull()) { mCharacteristicRingBuffer.clear(); mIsWritingCharacteristic = false; } } else //CharacteristicWrite fail { mCharacteristicRingBuffer.clear(); System.out.println("onCharacteristicWrite fail:" + new String(characteristic.getValue())); System.out.println(status); } } } @Override public void onCharacteristicRead(BluetoothGatt gatt, BluetoothGattCharacteristic characteristic, int status) { if (status == BluetoothGatt.GATT_SUCCESS) { gatt.readRemoteRssi(); System.out.println("onCharacteristicRead " + characteristic.getUuid().toString()); if (mSCharacteristic == mModelNumberCharacteristic) { if (new String(characteristic.getValue()).toUpperCase().startsWith("DF BLUNO")) { setCharacteristicNotification(mSCharacteristic, false); mSCharacteristic = mCommandCharacteristic; mSCharacteristic.setValue(mPassword); writeCharacteristic(mSCharacteristic); mSCharacteristic.setValue(mBaudrateBuffer); writeCharacteristic(mSCharacteristic); mSCharacteristic = mSerialPortCharacteristic; setCharacteristicNotification(mSCharacteristic, true); mConnectionState = STATE_CONNECTED; } else { Toast.makeText(getBaseContext(), "Please select DFRobot devices", Toast.LENGTH_SHORT) .show(); } } else if (mSCharacteristic == mSerialPortCharacteristic) { // Log.d("data",new String(characteristic.getValue())); } broadcastUpdate(ACTION_DATA_AVAILABLE, characteristic); } } @Override public void onDescriptorWrite(BluetoothGatt gatt, BluetoothGattDescriptor characteristic, int status) { System.out.println("onDescriptorWrite " + characteristic.getUuid().toString() + " " + status); } @Override public void onCharacteristicChanged(BluetoothGatt gatt, BluetoothGattCharacteristic characteristic) { //System.out.println("onCharacteristicChanged "+new String(characteristic.getValue())); //0 Log.d("data", new String(characteristic.getValue())); gatt.readRemoteRssi(); // TODO Auto-generated method stub String[] values = new String[1]; values[0] = new String(characteristic.getValue()).substring(0, 1); // Log.d("sitting",Integer.decode(values[0].replaceAll("[^\\.0123456789]", "").substring(0,1))+""); if (Integer.decode(values[0].replaceAll("[^\\.0123456789]", "")) == 1 || Integer.decode(values[0].replaceAll("[^\\.0123456789]", "")) == 0) { // Log.d("is","numeric"); sensor_value_sum += Integer.decode(values[0].replaceAll("[^\\.0123456789]", "")); sensor_counter++; if (sensor_counter == 10) { sensor_value = (sensor_value_sum / sensor_counter); Log.d("sensor value", sensor_value_sum + " " + sensor_counter); sensor_counter = 0; sensor_value_sum = 0; } } Log.d("rssicounter", rssicounter + ""); if (rssicounter > 10 && sensor_value == 1) { Vibrator v = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE); // Vibrate for 500 milliseconds v.vibrate(500); if (!notified) { NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(getBaseContext()) .setSmallIcon(R.mipmap.ic_launcher).setContentTitle(" ?") .setContentText(" ?!"); // Sets an ID for the notification int mNotificationId = 001; // Gets an instance of the NotificationManager service NotificationManager mNotifyMgr = (NotificationManager) getSystemService(NOTIFICATION_SERVICE); // Builds the notification and issues it. mNotifyMgr.notify(mNotificationId, mBuilder.build()); notified = true; } rssicounter = 0; } else if (rssicounter > 10) { rssicounter = 0; } // broadcastUpdate(ACTION_DATA_AVAILABLE, characteristic); } }; public static boolean isNumeric(String str) { try { double d = Double.parseDouble(str); } catch (NumberFormatException nfe) { return false; } return true; } private void broadcastUpdate(final String action) { final Intent intent = new Intent(action); sendBroadcast(intent); } private void broadcastUpdate(final String action, final BluetoothGattCharacteristic characteristic) { final Intent intent = new Intent(action); System.out.println("BluetoothLeService broadcastUpdate"); // This is special handling for the Heart Rate Measurement profile. Data parsing is // carried out as per profile specifications: // http://developer.bluetooth.org/gatt/characteristics/Pages/CharacteristicViewer.aspx?u=org.bluetooth.characteristic.heart_rate_measurement.xml // if (UUID_HEART_RATE_MEASUREMENT.equals(characteristic.getUuid())) { // int flag = characteristic.getProperties(); // int format = -1; // if ((flag & 0x01) != 0) { // format = BluetoothGattCharacteristic.FORMAT_UINT16; // Log.d(TAG, "Heart rate format UINT16."); // } else { // format = BluetoothGattCharacteristic.FORMAT_UINT8; // Log.d(TAG, "Heart rate format UINT8."); // } // final int heartRate = characteristic.getIntValue(format, 1); // Log.d(TAG, String.format("Received heart rate: %d", heartRate)); // intent.putExtra(EXTRA_DATA, String.valueOf(heartRate)); // } else { // For all other profiles, writes the data formatted in HEX. final byte[] data = characteristic.getValue(); if (data != null && data.length > 0) { intent.putExtra(EXTRA_DATA, new String(data)); sendBroadcast(intent); } // } } private void broadcastUpdate(int rssi) { final Intent intent = new Intent(ACTION_DATA_AVAILABLE); intent.putExtra("RSSI", rssi); sendBroadcast(intent); } public class LocalBinder extends Binder { BluetoothLeService getService() { return BluetoothLeService.this; } } @Override public IBinder onBind(Intent intent) { return mBinder; } @Override public boolean onUnbind(Intent intent) { // After using a given device, you should make sure that BluetoothGatt.close() is called // such that resources are cleaned up properly. In this particular example, close() is // invoked when the UI is disconnected from the Service. close(); return super.onUnbind(intent); } private final IBinder mBinder = new LocalBinder(); /** * Initializes a reference to the local Bluetooth adapter. * * @return Return true if the initialization is successful. */ public boolean initialize() { // For API level 18 and above, get a reference to BluetoothAdapter through // BluetoothManager. System.out.println("BluetoothLeService initialize" + mBluetoothManager); if (mBluetoothManager == null) { mBluetoothManager = (BluetoothManager) getSystemService(Context.BLUETOOTH_SERVICE); if (mBluetoothManager == null) { Log.e(TAG, "Unable to initialize BluetoothManager."); return false; } } mBluetoothAdapter = mBluetoothManager.getAdapter(); if (mBluetoothAdapter != null) { mBluetoothAdapter.startLeScan(mLeScanCallback); } else { Log.e(TAG, "Unable to obtain a BluetoothAdapter."); return false; } return true; } /** * Connects to the GATT server hosted on the Bluetooth LE device. * * @param address The device address of the destination device. * * @return Return true if the connection is initiated successfully. The connection result * is reported asynchronously through the * {@code BluetoothGattCallback#onConnectionStateChange(android.bluetooth.BluetoothGatt, int, int)} * callback. */ public boolean connect(final String address) { System.out.println("BluetoothLeService connect" + address + mBluetoothGatt); if (mBluetoothAdapter == null || address == null) { Log.w(TAG, "BluetoothAdapter not initialized or unspecified address."); return false; } // Previously connected device. Try to reconnect. // if (mBluetoothDeviceAddress != null && address.equals(mBluetoothDeviceAddress) // && mBluetoothGatt != null) { // Log.d(TAG, "Trying to use an existing mBluetoothGatt for connection."); // if (mBluetoothGatt.connect()) { // System.out.println("mBluetoothGatt connect"); // mConnectionState = STATE_CONNECTING; // return true; // } else { // System.out.println("mBluetoothGatt else connect"); // return false; // } // } final BluetoothDevice device = mBluetoothAdapter.getRemoteDevice(address); if (device == null) { Log.w(TAG, "Device not found. Unable to connect."); return false; } // We want to directly connect to the device, so we are setting the autoConnect // parameter to false. System.out.println("device.connectGatt connect"); synchronized (this) { mBluetoothGatt = device.connectGatt(this, false, mGattCallback); } Log.d(TAG, "Trying to create a new connection."); mBluetoothDeviceAddress = address; mConnectionState = STATE_CONNECTING; return true; } /** * Disconnects an existing connection or cancel a pending connection. The disconnection result * is reported asynchronously through the * {@code BluetoothGattCallback#onConnectionStateChange(android.bluetooth.BluetoothGatt, int, int)} * callback. */ public void disconnect() { System.out.println("BluetoothLeService disconnect"); if (mBluetoothAdapter == null || mBluetoothGatt == null) { Log.w(TAG, "BluetoothAdapter not initialized"); return; } mBluetoothGatt.disconnect(); } /** * After using a given BLE device, the app must call this method to ensure resources are * released properly. */ public void close() { System.out.println("BluetoothLeService close"); if (mBluetoothGatt == null) { return; } mBluetoothGatt.close(); mBluetoothGatt = null; } /** * Request a read on a given {@code BluetoothGattCharacteristic}. The read result is reported * asynchronously through the {@code BluetoothGattCallback#onCharacteristicRead(android.bluetooth.BluetoothGatt, android.bluetooth.BluetoothGattCharacteristic, int)} * callback. * * @param characteristic The characteristic to read from. */ public void readCharacteristic(BluetoothGattCharacteristic characteristic) { if (mBluetoothAdapter == null || mBluetoothGatt == null) { Log.w(TAG, "BluetoothAdapter not initialized"); return; } mBluetoothGatt.readCharacteristic(characteristic); } /** * Write information to the device on a given {@code BluetoothGattCharacteristic}. The content string and characteristic is * only pushed into a ring buffer. All the transmission is based on the {@code onCharacteristicWrite} call back function, * which is called directly in this function * * @param characteristic The characteristic to write to. */ public void writeCharacteristic(BluetoothGattCharacteristic characteristic) { if (mBluetoothAdapter == null || mBluetoothGatt == null) { Log.w(TAG, "BluetoothAdapter not initialized"); return; } //The character size of TI CC2540 is limited to 17 bytes, otherwise characteristic can not be sent properly, //so String should be cut to comply this restriction. And something should be done here: String writeCharacteristicString; try { writeCharacteristicString = new String(characteristic.getValue(), "ISO-8859-1"); } catch (UnsupportedEncodingException e) { // this should never happen because "US-ASCII" is hard-coded. throw new IllegalStateException(e); } System.out.println("allwriteCharacteristicString:" + writeCharacteristicString); //As the communication is asynchronous content string and characteristic should be pushed into an ring buffer for further transmission mCharacteristicRingBuffer .push(new BluetoothGattCharacteristicHelper(characteristic, writeCharacteristicString)); System.out.println("mCharacteristicRingBufferlength:" + mCharacteristicRingBuffer.size()); //The progress of onCharacteristicWrite and writeCharacteristic is almost the same. So callback function is called directly here //for details see the onCharacteristicWrite function mGattCallback.onCharacteristicWrite(mBluetoothGatt, characteristic, WRITE_NEW_CHARACTERISTIC); } /** * Enables or disables notification on a give characteristic. * * @param characteristic Characteristic to act on. * @param enabled If true, enable notification. False otherwise. */ public void setCharacteristicNotification(BluetoothGattCharacteristic characteristic, boolean enabled) { if (mBluetoothAdapter == null || mBluetoothGatt == null) { Log.w(TAG, "BluetoothAdapter not initialized"); return; } mBluetoothGatt.setCharacteristicNotification(characteristic, enabled); //BluetoothGattDescriptor descriptor = characteristic.getDescriptor(characteristic.getUuid()); //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); // } } /** * Retrieves a list of supported GATT services on the connected device. This should be * invoked only after {@code BluetoothGatt#discoverServices()} completes successfully. * * @return A {@code List} of supported services. */ public List<BluetoothGattService> getSupportedGattServices() { if (mBluetoothGatt == null) return null; return mBluetoothGatt.getServices(); } // Device scan callback. private BluetoothAdapter.LeScanCallback mLeScanCallback = new BluetoothAdapter.LeScanCallback() { @Override public void onLeScan(final BluetoothDevice device, final int rssi, byte[] scanRecord) { if (device.getName() != null) { Log.d("device", device.getName() + ""); if (device.getName().equals("BlunoV1.8")) { connect(device.getAddress()); // Log.d("rssi service",rssi+""); } } } }; private void getGattServices(List<BluetoothGattService> gattServices) { if (gattServices == null) return; String uuid = null; mModelNumberCharacteristic = null; mSerialPortCharacteristic = null; mCommandCharacteristic = null; mGattCharacteristics = new ArrayList<ArrayList<BluetoothGattCharacteristic>>(); // Loops through available GATT Services. for (BluetoothGattService gattService : gattServices) { uuid = gattService.getUuid().toString(); System.out.println("displayGattServices + uuid=" + uuid); List<BluetoothGattCharacteristic> gattCharacteristics = gattService.getCharacteristics(); ArrayList<BluetoothGattCharacteristic> charas = new ArrayList<BluetoothGattCharacteristic>(); // Loops through available Characteristics. for (BluetoothGattCharacteristic gattCharacteristic : gattCharacteristics) { charas.add(gattCharacteristic); uuid = gattCharacteristic.getUuid().toString(); if (uuid.equals(ModelNumberStringUUID)) { mModelNumberCharacteristic = gattCharacteristic; System.out.println( "mModelNumberCharacteristic " + mModelNumberCharacteristic.getUuid().toString()); } else if (uuid.equals(SerialPortUUID)) { mSerialPortCharacteristic = gattCharacteristic; System.out.println( "mSerialPortCharacteristic " + mSerialPortCharacteristic.getUuid().toString()); // updateConnectionState(R.string.comm_establish); } else if (uuid.equals(CommandUUID)) { mCommandCharacteristic = gattCharacteristic; System.out.println( "mSerialPortCharacteristic " + mSerialPortCharacteristic.getUuid().toString()); // updateConnectionState(R.string.comm_establish); } } mGattCharacteristics.add(charas); } if (mModelNumberCharacteristic == null || mSerialPortCharacteristic == null || mCommandCharacteristic == null) { Log.d("charactaristics", "null"); Toast.makeText(getApplicationContext(), "characteristics null", Toast.LENGTH_SHORT); } else { mSCharacteristic = mModelNumberCharacteristic; setCharacteristicNotification(mSCharacteristic, true); readCharacteristic(mSCharacteristic); } } }