03.BLE DataTranfor

Client

• 扫描设备：

final BluetoothManager bluetoothManager =
           (BluetoothManager) getSystemService(Context.BLUETOOTH_SERVICE);
   mBluetoothAdapter = bluetoothManager.getAdapter();
 mBluetoothAdapter.startLeScan(mScanCallBack)

mScanCallBack

new BluetoothAdapter.LeScanCallback() {
      @Override
      public void onLeScan(final BluetoothDevice device, int rssi, byte[] scanRecord) {
         // 可以拿到远程设备和rssi设备信号强度
      }
    }

• Connecting to a GATT Server

BluetoothGatt mBluetoothGatt = device.connectGatt(this, false, mGattCallback)

回调函数
**特征**

* onCharacteristicChanged(BluetoothGatt gatt, BluetoothGattCharacteristic characteristic)
* onCharacteristicRead(BluetoothGatt gatt, BluetoothGattCharacteristic characteristic, int status)
* onCharacteristicWrite(BluetoothGatt gatt, BluetoothGattCharacteristic characteristic, int status)

**状态改变**

* onConnectionStateChange(BluetoothGatt gatt, int status, int newState)

**描述**

* onDescriptorRead(BluetoothGatt gatt, BluetoothGattDescriptor descriptor, int status)
* onDescriptorWrite(BluetoothGatt gatt, BluetoothGattDescriptor descriptor, int status)
* onMtuChanged(BluetoothGatt gatt, int mtu, int status)
* onReadRemoteRssi(BluetoothGatt gatt, int rssi, int status)
* onReliableWriteCompleted(BluetoothGatt gatt, int status)

**发现设备**

* onServicesDiscovered(BluetoothGatt gatt, int status)
*

bluetoothGatt 读写数据

- readCharacteristic(BluetoothGattCharacteristic characteristic)

- readDescriptor(BluetoothGattDescriptor descriptor)

- readRemoteRssi()

- requestConnectionPriority(int connectionPriority)

- requestMtu(int mtu)

- setCharacteristicNotification(BluetoothGattCharacteristic characteristic, boolean enable)

- writeCharacteristic(BluetoothGattCharacteristic characteristic)

- writeDescriptor(BluetoothGattDescriptor descriptor)

Server

设置广播 Ad

• 广播设置 AdvertiseSettings.Builder
• 广播数据设置 AdvertiseData.Builder

connect to gattServer

mBluetoothManager = (BluetoothManager) mContex.getSystemService(Context.BLUETOOTH_SERVICE);
mBluetoothAdapter = mBluetoothManager.getAdapter();
sGattServer = mBluetoothManager.openGattServer(mContex, callback);
//添加service, Characteristic , Descriptor

// callBack 

- onCharacteristicReadRequest(BluetoothDevice device, int requestId, int offset, BluetoothGattCharacteristic characteristic)

- onCharacteristicWriteRequest(BluetoothDevice device, int requestId, BluetoothGattCharacteristic characteristic, boolean preparedWrite, boolean responseNeeded, int offset, byte[] value)

- onConnectionStateChange(BluetoothDevice device, int status, int newState)

- onDescriptorReadRequest(BluetoothDevice device, int requestId, int offset, BluetoothGattDescriptor descriptor)

- onDescriptorWriteRequest(BluetoothDevice device, int requestId, BluetoothGattDescriptor descriptor, boolean preparedWrite, boolean responseNeeded, int offset, byte[] value)

- onExecuteWrite(BluetoothDevice device, int requestId, boolean execute)

- onNotificationSent(BluetoothDevice device, int status)

- onServiceAdded(int status, BluetoothGattService service)

client Server 之间的数据流程传输控制。

//白板画图