2014-09-蓝牙4.0初体验.docx

蓝牙4.0Ble 开发要点Android 4.3才开始支持BLE API，所以保证在蓝牙4.0在Android 4.3及其以上的系统使用首先要确定他所需要的权限，2个权限如下：BLE分为三部分Service、Characteristic、Descriptor，这三部分都由UUID作为唯一标示符。一个蓝牙4.0的终端可以包含多个Service，一个Service可以包含多个Characteristic，一个Characteristic包含一个Value和多个Descriptor，一个Descriptor包含一个Value。蓝牙使用第一步：判断手机是否支持蓝牙4.0 方法如下if(getPackageManager().hasSystemFeature(PackageManager.FEATURE_BLUETOOTH_LE) / 满足条件，表示手机支持初始化 Bluetooth adapter, 通过蓝牙管理器得到一个参考蓝牙适配器(API必须在以上android4.3或以上和版本)BluetoothManager bluetoothManager = (BluetoothManager) getSystemService(Context.BLUETOOTH_SERVICE);mBluetoothAdapter = bluetoothManager.getAdapter();蓝牙使用第二步：搜索蓝牙设备/开始搜索mBluetoothAdapter.startLeScan(mLeScanCallback);/停止搜索mBluetoothAdapter.stopLeScan(mLeScanCallback);搜索蓝牙的回调方法：/ Device scan callback.private BluetoothAdapter.LeScanCallback mLeScanCallback = new BluetoothAdapter.LeScanCallback() Overridepublic void onLeScan(final BluetoothDevice device, final int rssi, final byte scanRecord) runOnUiThread(new Runnable() Overridepublic void run() / 可以获取搜索到的蓝牙的一些信息 ，包括名称，mark地址等等name = device.getName();address = device.getAddress(););第三步：蓝牙连接mBluetoothGatt = device.connectGatt(this, false, mGattCallback);此方法会根据连接的结果给予回调方法；private final BluetoothGattCallback mGattCallback = new BluetoothGattCallback() Overridepublic void onConnectionStateChange(BluetoothGatt gatt, int status,int newState) String intentAction;System.out.println(=status: + status+,newState=+newState);/ 蓝牙连接成功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:+ mBluetoothGatt.discoverServices();/ 蓝牙连接成功之后，必须调用此方法来发现蓝牙的服务mBluetoothGatt.discoverServices()； / 蓝牙连接失败else if (newState = BluetoothProfile.STATE_DISCONNECTED) intentAction = ACTION_GATT_DISCONNECTED;mConnectionState = STATE_DISCONNECTED;Log.i(TAG, Disconnected from GATT server.);broadcastUpdate(intentAction);/ 发现服务Overridepublic void onServicesDiscovered(BluetoothGatt gatt, int status) if (status = BluetoothGatt.GATT_SUCCESS) / 发现服务 else / 读取蓝牙数据Overridepublic void onCharacteristicRead(BluetoothGatt gatt,BluetoothGattCharacteristic characteristic, int status) System.out.println(onCharacteristicRead);if (status = BluetoothGatt.GATT_SUCCESS) broadcastUpdate(ACTION_DATA_AVAILABLE, characteristic);Overridepublic void onDescriptorWrite(BluetoothGatt gatt,BluetoothGattDescriptor descriptor, int status) System.out.println(onDescriptorWriteonDescriptorWrite = + status+ , descriptor = + descriptor.getUuid().toString();/ 服务状态发生变化Overridepublic void onCharacteristicChanged(BluetoothGatt gatt,BluetoothGattCharacteristic characteristic) broadcastUpdate(ACTION_DATA_AVAILABLE, characteristic);if (characteristic.getValue() != null) System.out.println(characteristic.getStringValue(0);System.out.println(-onCharacteristicChanged-);/ 获取蓝牙信号强度Overridepublic void onReadRemoteRssi(BluetoothGatt gatt, int rssi, int status) System.out.println(rssi = + rssi);/ 写入数据public void onCharacteristicWrite(BluetoothGatt gatt,BluetoothGattCharacteristic characteristic, int status) System.out.println(-write success- status: + status);System.out.println(-write success- WriteType: + characteristic.getWriteType();第四步：蓝牙服务读取 读取蓝牙服务，遍历服务，获取到自己需要的服务uuid遍历次服务下的特征值，判断读，写，通知属性，设置通知属性发送数据到蓝牙设备打开通知for (BluetoothGattService gattService : gattServices) uuid_1 = gattService.getUuid().toString();Log.e(info1,uuid_1=+uuid_1);List gattCharacteristics = gattService.getCharacteristics();Map charas = new HashMap();if(Config.uuid.equals(uuid_1)String uuid=null;/ Loops through available Characteristics.for (final BluetoothGattCharacteristic gattCharacteristic : gattCharacteristics) uuid = gattCharacteristic.getUuid().toString();Log.e(info1,uuid=+uuid);if(Config.uuid_write.equals(uuid)final int prop = gattCharacteristic.getProperties();/ 具有可写属性 if (prop & BluetoothGattCharacteristic.PROPERTY_WRITE) 0) Log.e(info,uuid_write 可读);/ 具有通知属性 if (prop & BluetoothGattCharacteristic.PROPERTY_NOTIFY) 0) Log.e(info,uuid_write 通知属性);if (prop & BluetoothGattCharacteristic.PROPERTY_WRITE) 0) Log.e(info,uuid_write 可写);charas.put(uuid, gattCharacteristic);if(Config.uuid_read.equals(uuid)final int prop = gattCharacteristic.getProperties();/ 具有可写属性 if (prop & BluetoothGattCharacteristic.PROPERTY_WRITE) 0) Log.e(info,uuid_read 可写);/ 具有可读属性 if (prop & BluetoothGattCharacteristic.PROPERTY_READ) 0) Log.e(info,uuid_read 可读);/ 具有通知属性 if (prop & BluetoothGattCharacteristic.PROPERTY_NOTIFY) 0) Log.e(info,uuid_read 通知属性);MyApplication.getInstance().bindService.setCharacteristicNotification(gattCharacteristic, true);charas.put(uuid, gattCharacteristic);i