Android 蓝牙4.0 BLE调试

配备低功耗蓝牙的可穿戴式设备应该是未来的一大趋势。

继IOS去年支持蓝牙BLE之后，Android最新的4.3版本也有了官方的支持。

受软硬件限制，目前的尝试基于第三方SDK。

Host端：支持蓝牙4.0的GS4手机，配合三星的蓝牙BLE开发包 http://developer.samsung.com/ble

Device端：支持蓝牙BLE的单片机CC2540，配合TI开发板 http://processors.wiki.ti.com/index.php/SensorTag_User_Guide

目标：手机监测CC2540的距离和方向

1. 设备匹配

与普通蓝牙设备的匹配类似，区别在于要判断是否是BLE设备。

 mBtAdapter = BluetoothAdapter.getDefaultAdapter();
     if (!mBtAdapter.isEnabled()) {
         Log.i(TAG, "onClick - BT not enabled yet");
         Intent enableIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
         startActivityForResult(enableIntent, REQUEST_ENABLE_BT);
     }
     else {
         Intent newIntent = new Intent(HRPCollectorActivity.this, DeviceListActivity.class);
         startActivityForResult(newIntent, REQUEST_SELECT_DEVICE);
     }

 Set pairedDevices = mBtAdapter.getBondedDevices();
 for (BluetoothDevice pairedDevice : pairedDevices) {
     boolean result = false;
     result = mService.isBLEDevice(pairedDevice);
     if (result == true) {
         addDevice(pairedDevice, 0);
     }
 }

2. 使能Service

要取得与设备的蓝牙通信，必须先Configure该数据类型的Service Profile。

 public static final UUID ACC_MEASUREMENT_CHARAC = UUID.fromString("F000AA51-0451-4000-B000-000000000000");
 public static final UUID ACC_MEASUREMENT_CHARAC2 = UUID.fromString("F000AA52-0451-4000-B000-000000000000");

     BluetoothGattService mHRP = mBluetoothGatt.getService(device, ACC_SERVICE);
     BluetoothGattCharacteristic mHRCPcharac2 = mHRP.getCharacteristic(ACC_MEASUREMENT_CHARAC2);
     value[0] = (byte) 0x01;
     mHRCPcharac2.setValue(value[0], BluetoothGattCharacteristic.FORMAT_UINT8, 0);
     mBluetoothGatt.writeCharacteristic(mHRCPcharac2);
     BluetoothGattCharacteristic mHRMcharac = mHRP.getCharacteristic(ACC_MEASUREMENT_CHARAC);
     mBluetoothGatt.setCharacteristicNotification(mHRMcharac, true);

3. 获取数据

 /**
  * GATT client callbacks
  */
 private BluetoothGattCallback mGattCallbacks = new BluetoothGattCallback() {
     public void onCharacteristicRead(BluetoothGattCharacteristic charac, int status) {
         if (charUuid.equals(ACC_MEASUREMENT_CHARAC)) {
             byte[] accname = charac.getValue();
         }

参考资料：http://blog.csdn.net/ooakk/article/details/7302425

来源：http://blog.csdn.net/qianjin0703/article/details/9995619