蓝牙耳机：getProfileConnectionState 始终返回连接状态

Question

我正在尝试检查是否有蓝牙耳机连接到设备

    BluetoothAdapter mAdapter;
    mAdapter = BluetoothAdapter.getDefaultAdapter();
    Log.d("TAG","HEADSET: " + mAdapter.getProfileConnectionState(BluetoothProfile.HEADSET));
    Log.d("TAG","HEALTH: " + mAdapter.getProfileConnectionState(BluetoothProfile.HEALTH));
    Log.d("TAG","A2DP: " + mAdapter.getProfileConnectionState(BluetoothProfile.A2DP));

这始终返回 HEADSET 2（已连接）、Health 0（已断开连接）和 A2DP 0（已断开连接）。我是否连接了蓝牙耳机并不重要，只有在禁用蓝牙时，耳机连接状态才为 0