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android BLE Peripheral 做外设模拟设备,供ios、android 连接通讯。
为了能让其它设备可以发现其设备,先启动特定广播。看自己需要什么广播格式。
android 对外发出广播,都一样,只是更改其中的方法:
android BLE Peripheral 模拟 ibeacon 发出ble 广播
开始广播: 增加使用BluetoothGattServer
1 public void startAdvertising(MockServerCallBack callBack) { 2 //获取BluetoothLeAdvertiser,BLE发送BLE广播用的一个API 3 if (mBluetoothAdvertiser == null) { 4 mBluetoothAdvertiser = mBluetoothAdapter.getBluetoothLeAdvertiser(); 5 } 6 //创建BluetoothGattServerCallback, 7 // MockServerCallBack这个类继承自BluetoothGattServerCallback 8 // BluetoothGattServerCallback这个回调类主要是一些BLE读写的接口 9 // 关于BLE读写的操作都在这个Callback中完成10 if (mBluetoothAdvertiser != null) {11 mMockServerCallBack = callBack;12 //打开BluetoothGattServer13 mGattServer = mBluetoothManager.openGattServer(mActivity, mMockServerCallBack);14 if (mGattServer == null) {15 Log.e(TAG, "gatt is null");16 }17 try {18 mMockServerCallBack.setupServices(mActivity, mGattServer);20 mBluetoothAdvertiser.startAdvertising(createAdvSettings(true, 0)21 , createAdvertiseData(BluetoothUUID.bleServerUUID), mAdvCallback);22 } catch (Exception e) {23 Log.v(TAG, "Fail to setup BleService");24 }25 }26 27 isAdvertising = true;28 }
创建广播,添加serviceUuid,广播内容,自行决定。
addServiceUuid(ParcelUuid serviceUuid) 的作用。
广播数据加入serviceUuid , 当其它设备扫描时,就可以根据此serviceUuid进行特定扫描.
扫描BLE设备的时候:启动扫描时,有可选参数,传入uuid数组。
BluetoothAdapterpublic boolean startLeScan(final UUID[] serviceUuids, final LeScanCallback callback);
使用该函数启动扫描的,会根据所传入的uuid,去扫描过滤,只返回符合条件的设备。
注意:部分手机可能设置uuid后,扫描不到设备,可能底层扫描问题。
1 public static AdvertiseData createAdvertiseData(UUID proximityUuid) { 2 AdvertiseData.Builder builder = new AdvertiseData.Builder(); 4 builder.addManufacturerData(0x0301, new byte[]{0x01, 0x03}); 5 builder.addServiceUuid(ParcelUuid.fromString(BluetoothUUID.bleServerUUID.toString()) 7 AdvertiseData adv = builder.build();10 return adv;11 }
BluetoothGattServerCallback:服务事件的回调
打开notification 对应的value为 BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE
打开indication 对应的value为 BluetoothGattDescriptor.ENABLE_INDICATION_VALUE
关闭notification 对应的value均为BluetoothGattDescriptor.DISABLE_NOTIFICATION_VALUE
服务事件响应过程:
(1) 当客户端开始写入数据时: 触发回调方法 onDescriptorWriteRequest
(2) 在 onDescriptorWriteRequest 方法中,执行下面的方法表示 写入成功 BluetoothGatt.GATT_SUCCESS
1 bluetoothGattServer.sendResponse(device, requestId, BluetoothGatt.GATT_SUCCESS, offset, value);2 // 执行 sendResponse后,会触发回调方法 onCharacteristicWriteRequest
(3) 在 onCharacteristicWriteRequest方法中:
1 public void onCharacteristicWriteRequest(BluetoothDevice device, int requestId2 , BluetoothGattCharacteristic characteristic, boolean preparedWrite, boolean responseNeeded, int offset, byte[] requestBytes) {3 // 这个里可以获得 来自客户端发来的数据 requestBytes4 }
(4) 处理响应内容
BluetoothGattServerCallback :
1 public class MockServerCallBack extends BluetoothGattServerCallback { 2 3 public void setupServices(Context context, BluetoothGattServer gattServer) throws InterruptedException { 4 if (gattServer == null) { 5 throw new IllegalArgumentException("gattServer is null"); 6 } 7 mGattServer = gattServer; 8 // 设置一个GattService以及BluetoothGattCharacteristic 9 BluetoothGattService service = new BluetoothGattService(BluetoothUUID.bleServerUUID, 10 BluetoothGattService.SERVICE_TYPE_PRIMARY); 11 12 BluetoothGattService service2 = new BluetoothGattService(BluetoothUUID.bleServerUUID2, 13 BluetoothGattService.SERVICE_TYPE_PRIMARY); 14 15 //add a read characteristic. 16 // 当是ios设备连接过来时,需添加BluetoothGattCharacteristic.PROPERTY_INDICATE进行兼容。 17 mCharacteristicRead = new BluetoothGattCharacteristic(BluetoothUUID.readDataUUID 18 , BluetoothGattCharacteristic.PROPERTY_READ | BluetoothGattCharacteristic.PROPERTY_INDICATE 19 , BluetoothGattCharacteristic.PERMISSION_READ); 20 //add a descriptor 21 BluetoothGattDescriptor descriptor = new BluetoothGattDescriptor(BluetoothUUID.CLIENT_CHARACTERISTIC_CONFIG 22 , BluetoothGattCharacteristic.PERMISSION_WRITE); 23 mCharacteristicRead.addDescriptor(descriptor); 24 service.addCharacteristic(mCharacteristicRead); 25 26 BluetoothGattCharacteristic write = new BluetoothGattCharacteristic( 27 BluetoothUUID.writeDataUUID, 28 BluetoothGattCharacteristic.PROPERTY_WRITE | BluetoothGattCharacteristic.PROPERTY_READ | BluetoothGattCharacteristic.PROPERTY_INDICATE, 29 BluetoothGattCharacteristic.PERMISSION_WRITE); 30 31 service.addCharacteristic(write); 32 33 if (mGattServer != null && service != null) { 34 mGattServer.addService(service); 35 mGattServer.addService(service2); 36 } 37 38 } 39 40 //当添加一个GattService成功后会回调改接口。 41 public void onServiceAdded(int status, BluetoothGattService service) { 42 super.onServiceAdded(status, service); 43 if (status == BluetoothGatt.GATT_SUCCESS) { 44 Log.d(TAG, "onServiceAdded status=GATT_SUCCESS service=" + service.getUuid().toString()); 45 } else { 46 Log.d(TAG, "onServiceAdded status!=GATT_SUCCESS"); 47 } 48 } 49 50 //BLE设备连接状态发生改变后回调的接口 51 public void onConnectionStateChange(android.bluetooth.BluetoothDevice device, int status, 52 int newState) { 53 super.onConnectionStateChange(device, status, newState); 54 Log.e(TAG, String.format("1.onConnectionStateChange:device name = %s, address = %s" 55 , device.getName(), device.getAddress())); 56 Log.d(TAG, "onConnectionStateChange status=" + status + "->" + newState); 57 if (newState == BluetoothProfile.STATE_DISCONNECTED) { 58 btClient = null; // 移除连接设备 59 } 60 } 61 62 //当有客户端来读数据时回调的接口 63 64 /** 65 * 特征被读取。当回复响应成功后,客户端会读取然后触发本方法, 66 */ 67 public void onCharacteristicReadRequest(android.bluetooth.BluetoothDevice device, 68 int requestId, int offset, BluetoothGattCharacteristic characteristic) { 69 super.onCharacteristicReadRequest(device, requestId, offset, characteristic); 70 characteristic.setValue(new byte[]{0x03, 0x01}); 71 Log.e(TAG, String.format("1.onCharacteristicReadRequest:device name = %s, address = %s" 72 , device.getName(), device.getAddress())); 73 Log.e(TAG, String.format("onCharacteristicReadRequest:requestId = %s, offset = %s", requestId, offset)); 74 boolean result = mGattServer.sendResponse(device, requestId, BluetoothGatt.GATT_SUCCESS, offset, characteristic.getValue()); 75 76 Log.e(TAG, "read request send response:" + result); 77 } 78 79 //当有客户端来写数据时回调的接口 80 81 /** 82 * 接受具体数据字节 85 */ 86 @Override 87 public void onCharacteristicWriteRequest(android.bluetooth.BluetoothDevice device, 88 int requestId, BluetoothGattCharacteristic characteristic, boolean preparedWrite, 89 boolean responseNeeded, int offset, byte[] value) { 90 super.onCharacteristicWriteRequest(device, requestId, characteristic, preparedWrite, responseNeeded, offset, value); 91 92 mGattServer.sendResponse(device, requestId, BluetoothGatt.GATT_SUCCESS, offset, null); 93 94 // 处理其它设备写进来的数据 95 value. // 处理数据 byte[] value,记住连接设备 96 97 } 98 99 //描述被写入时,在这里执行bluetoothGattServer.sendResponse(device, requestId, BluetoothGatt.GATT_SUCCESS...) 时,触发onCharacteristicWriteRequest100 @Override101 public void onDescriptorWriteRequest(BluetoothDevice device, int requestId, BluetoothGattDescriptor descriptor, boolean preparedWrite, boolean responseNeeded, int offset, byte[] value) {102 super.onDescriptorWriteRequest(device, requestId, descriptor, preparedWrite, responseNeeded, offset, value);103 104 Log.d(TAG, "onDescriptorWriteRequest:" + Arrays.toString(value));105 // now tell the connected device that this was all successfull106 mGattServer.sendResponse(device, requestId, BluetoothGatt.GATT_SUCCESS, offset, value);107 }108 109 }
android BLE Peripheral 做外设模拟设备,供ios、android 连接通讯。