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/* * Copyright (C) 2013 The Android Open Source Project */*from w w w . jav a 2s . co m*/ * 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 com.movisens.gattsensorexample.services; import java.util.List; import android.annotation.TargetApi; 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.IBinder; import android.os.ParcelUuid; import android.util.Log; import com.movisens.gattsensorexample.utils.BleQueue; import com.movisens.smartgattlib.Descriptor; /** * Service for managing connection and data communication with a GATT server * hosted on a given Bluetooth LE device. */ @TargetApi(18) public class BluetoothLeService extends Service { private final static String TAG = BluetoothLeService.class.getSimpleName(); private BluetoothManager mBluetoothManager; private BluetoothAdapter mBluetoothAdapter; //private String mBluetoothDeviceAddress; private BluetoothGatt mBluetoothGatt; private int mConnectionState = STATE_DISCONNECTED; private BleQueue bleQueue; private static final int STATE_DISCONNECTED = 0; private static final int STATE_CONNECTING = 1; private static final int STATE_CONNECTED = 2; public final static String ACTION_GATT_CONNECTED = "com.movisens.rmssdtrigger.services.BluetoothLeService.ACTION_GATT_CONNECTED"; public final static String ACTION_GATT_DISCONNECTED = "com.movisens.rmssdtrigger.services.BluetoothLeService.ACTION_GATT_DISCONNECTED"; public final static String ACTION_GATT_SERVICES_DISCOVERED = "com.movisens.rmssdtrigger.services.BluetoothLeService.ACTION_GATT_SERVICES_DISCOVERED"; public final static String ACTION_DATA_AVAILABLE = "com.movisens.rmssdtrigger.services.BluetoothLeService.ACTION_DATA_AVAILABLE"; public final static String EXTRA_DATA = "com.movisens.rmssdtrigger.services.BluetoothLeService.EXTRA_DATA"; public final static String EXTRA_CHARACTERISTIC = "com.movisens.rmssdtrigger.services.BluetoothLeService.EXTRA_CHARACTERISTIC"; public final static String ACTION_GATT_SERVICES_ERROR = "com.movisens.rmssdtrigger.services.BluetoothLeService.GATT_SERVICES_ERROR"; // 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; if (status == BluetoothGatt.GATT_SUCCESS) { if (newState == BluetoothProfile.STATE_CONNECTED) { intentAction = ACTION_GATT_CONNECTED; mConnectionState = STATE_CONNECTED; broadcastUpdate(intentAction); Log.i(TAG, "Connected to GATT server."); // Attempts to discover services after successful // connection. Log.i(TAG, "Attempting to start service discovery:" + gatt.discoverServices()); } else if (newState == BluetoothProfile.STATE_DISCONNECTED) { intentAction = ACTION_GATT_DISCONNECTED; mConnectionState = STATE_DISCONNECTED; Log.i(TAG, "Disconnected from GATT server."); broadcastUpdate(intentAction); // Necessary to disconnect and close because of Android bug: // https://code.google.com/p/android/issues/detail?id=58381#c17 // http://stackoverflow.com/a/18889509/2616544 disconnect(); // close(); } } else { // disconnect(); // close(); intentAction = ACTION_GATT_SERVICES_ERROR; mConnectionState = STATE_DISCONNECTED; Log.i(TAG, "Gatt server error, status: " + status + ", newState: " + newState); broadcastUpdate(intentAction); } } @Override public void onServicesDiscovered(BluetoothGatt gatt, int status) { if (status == BluetoothGatt.GATT_SUCCESS) { broadcastUpdate(ACTION_GATT_SERVICES_DISCOVERED); } else { Log.w(TAG, "onServicesDiscovered received: " + status); } } @Override public void onCharacteristicRead(BluetoothGatt gatt, BluetoothGattCharacteristic characteristic, int status) { bleQueue.onCharacteristicRead(gatt, characteristic, status); if (status == BluetoothGatt.GATT_SUCCESS) { broadcastUpdate(ACTION_DATA_AVAILABLE, characteristic); } } @Override public void onCharacteristicWrite(BluetoothGatt gatt, BluetoothGattCharacteristic characteristic, int status) { bleQueue.onCharacteristicWrite(gatt, characteristic, status); if (status == BluetoothGatt.GATT_SUCCESS) { Log.d(TAG, "Characteristic writing successful"); } else if (status == BluetoothGatt.GATT_INSUFFICIENT_AUTHENTICATION) { // this is where the tricky part comes if (gatt.getDevice().getBondState() == BluetoothDevice.BOND_NONE) { Log.e(TAG, "Bonding required!!!"); } else { // this situation happens when you try to connect for the // second time to already bonded device // it should never happen, in my opinion Log.e(TAG, "The phone is trying to read from paired device without encryption. Android Bug?"); // I don't know what to do here // This error was found on Nexus 7 with KRT16S build of // Andorid 4.4. It does not appear on Samsung S4 with // Andorid 4.3. } } else { Log.e(TAG, "Error writing characteristic, status: " + status); } } @Override public void onDescriptorWrite(BluetoothGatt gatt, BluetoothGattDescriptor descriptor, int status) { if (status == BluetoothGatt.GATT_SUCCESS) { Log.d(TAG, "Discriptor writing successful"); } else if (status == BluetoothGatt.GATT_INSUFFICIENT_AUTHENTICATION) { // this is where the tricky part comes if (gatt.getDevice().getBondState() == BluetoothDevice.BOND_NONE) { Log.e(TAG, "Bonding required!!!"); } else { // this situation happens when you try to connect for the // second time to already bonded device // it should never happen, in my opinion Log.e(TAG, "The phone is trying to read from paired device without encryption. Android Bug?"); // I don't know what to do here // This error was found on Nexus 7 with KRT16S build of // Andorid 4.4. It does not appear on Samsung S4 with // Andorid 4.3. } } else { Log.e(TAG, "Error writing descriptor, status: " + status); } bleQueue.onDescriptorWrite(gatt, descriptor, status); }; @Override public void onCharacteristicChanged(BluetoothGatt gatt, BluetoothGattCharacteristic characteristic) { broadcastUpdate(ACTION_DATA_AVAILABLE, characteristic); } }; 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); intent.putExtra(EXTRA_DATA, characteristic.getValue()); intent.putExtra(EXTRA_CHARACTERISTIC, new ParcelUuid(characteristic.getUuid())); sendBroadcast(intent); } public class LocalBinder extends Binder { public 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. 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) { 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) { 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()) { // mConnectionState = STATE_CONNECTING; // return true; // } else { // return false; // } // }// else // if (mBluetoothDeviceAddress != null // && !address.equals(mBluetoothDeviceAddress) // && mBluetoothGatt != null) { // Log.d(TAG, "Clearing out existing connection"); // disconnect(); // close(); // } 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. mBluetoothGatt = device.connectGatt(this, false, mGattCallback); bleQueue = new BleQueue(mBluetoothGatt); 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() { 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() { 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; } bleQueue.readCharacteristic(characteristic); } /** * 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 writeCharacteristic(BluetoothGattCharacteristic characteristic) { if (mBluetoothAdapter == null || mBluetoothGatt == null) { Log.w(TAG, "BluetoothAdapter not initialized"); return; } bleQueue.writeCharacteristic(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); // Is this specific to Heart Rate Measurement? BluetoothGattDescriptor descriptor = characteristic .getDescriptor(Descriptor.CLIENT_CHARACTERISTIC_CONFIGURATION); if (descriptor != null) { descriptor .setValue(BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE); bleQueue.writeDescriptor(descriptor); } } /** * Enables or disables notification on a give characteristic. * * @param characteristic * Characteristic to act on. * @param enabled * If true, enable notification. False otherwise. */ public void setCharacteristicIndication( BluetoothGattCharacteristic characteristic, boolean enabled) { if (mBluetoothAdapter == null || mBluetoothGatt == null) { Log.w(TAG, "BluetoothAdapter not initialized"); return; } mBluetoothGatt.setCharacteristicNotification(characteristic, enabled); // Is this specific to Heart Rate Measurement? BluetoothGattDescriptor descriptor = characteristic .getDescriptor(Descriptor.CLIENT_CHARACTERISTIC_CONFIGURATION); if (descriptor != null) { descriptor .setValue(BluetoothGattDescriptor.ENABLE_INDICATION_VALUE); bleQueue.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(); } public boolean isConnected() { return mConnectionState == STATE_CONNECTED; } public static boolean setBluetooth(boolean enable) { BluetoothAdapter bluetoothAdapter = BluetoothAdapter .getDefaultAdapter(); boolean isEnabled = bluetoothAdapter.isEnabled(); if (enable && !isEnabled) { return bluetoothAdapter.enable(); } else if (!enable && isEnabled) { return bluetoothAdapter.disable(); } // No need to change bluetooth state return true; } @Override public void onDestroy() { super.onDestroy(); disconnect(); close(); } }