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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));

这总是返回 HEADSET 2（已连接）、Health 0（已断开）和 A2DP 0（已断开）。有没有连接蓝牙耳机没关系，耳机连接状态只有在蓝牙被禁用时才为0

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