单项选择题

建立蓝牙连接时通过()方法类获取BluetoothAdapter对象。

A.BluetoothAdapter.getBluetoothAdapterAdapter()
B.BluetoothAdapteradapter=newBluetoothAdapter()
C.BluetoothAdapter.BluetoothAdapterAdapter()
D.BluetoothAdapter.getDefaultAdapter()