Question

我正在尝试检查我的设备何时与汽车相连。我认为这款车就像一个蓝牙耳机，因此我在我的活动中使用了以下代码：

    // Get the default adapter
    BluetoothAdapter mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
    BluetoothProfile.ServiceListener mProfileListener = new BluetoothProfile.ServiceListener() {
        public void onServiceConnected(int profile, BluetoothProfile proxy) {
            Time today = new Time(Time.getCurrentTimezone());
            today.setToNow();
            if (profile == BluetoothProfile.HEADSET) {
                mBluetoothHeadset = (BluetoothHeadset) proxy;

                LogginUtil.logString("BluetoothApp", "Headset event called at " + today.format("%k:%M:%S") + " - " + profile);
            } else {
                LogginUtil.logString("BluetoothApp", "Other event called at " + today.format("%k:%M:%S") + " - " + profile);
            }
        }
        public void onServiceDisconnected(int profile) {
            if (profile == BluetoothProfile.HEADSET) {
                mBluetoothHeadset = null;
                Time today = new Time(Time.getCurrentTimezone());
                today.setToNow();
                LogginUtil.logString("BluetoothApp", "Headset event disconnected at " + today.format("%k:%M:%S"));
            }
        }
    };
    // Establish connection to the proxy.
    mBluetoothAdapter.getProfileProxy(getApplicationContext(), mProfileListener, BluetoothProfile.HEADSET);

当我启动应用程序时，打开和关闭蓝牙，我得到以下输出：

Headset event called at "current time" - 1

当我将我的设备与汽车配对时，我得到完全相同的输出：

Headset event called at "current time" - 1

我需要做些什么来检测我的设备是否通过蓝牙与汽车主动连接？

提前感谢您，如果您需要其他任何内容，请告知我们。

编辑澄清

以防万一我的问题被误解了。当设备进入通过蓝牙连接到汽车的状态时，我想得到通知（只是一个日志）。这样的事情可能吗？

Answer 1

我现在无法尝试，但也许这可行：

int[] validStates = {BluetoothHeadset.STATE_AUDIO_CONNECTED};
List<BluetoothDevice> mConnectedDevices =
  mBluetoothHeadset.getDevicesMatchingConnectionStates(validStates);
if (!mConnectedDevices.isEmpty()) {
    // You've got something connected here
}

来源：

http://developer.android.com/reference/android/bluetooth/BluetoothHeadset.html http://developer.android.com/reference/android/bluetooth/BluetoothProfile.html#getConnectedDevices()

Answer 2

一个快速谷歌找到了这个答案，它适用于很多人，所以我很确定它应该适合你。资料来源：How to get Bluetooth Headset connection state on application start-up using Android2.2?

array.push_back(std::move(day));

蓝牙连接汽车

2 个答案: