private final BluetoothGattCallback mGattCallback = new BluetoothGattCallback() {
@Override
public void onConnectionStateChange(BluetoothGatt gatt, int status,
        int newState) {
    // TODO Auto-generated method stub
    String intentAction;
    if(newState == BluetoothProfile.STATE_CONNECTED) {
        intentAction = ACTION_GATT_CONNECTED;
        mConnectionState = STATE_CONNECTED;
        mBluetoothGatt.readRemoteRssi();