如何使用 BluetoothHeadset API 获取蓝牙连接的设备

Posted 2023-02-24

【中文标题】如何使用 BluetoothHeadset API 获取蓝牙连接的设备

【英文标题】：How to get bluetooth connected devices using BluetoothHeadset API

【发布时间】：2012-09-20 08:49:32

【问题描述】：

我想获取蓝牙连接设备的列表...而不仅仅是配对设备。

我在 API 级别 11 中找到了BluetoothHeadset API，它提供了方法 getConnectedDevices() 来获取连接的蓝牙设备列表。

如何使用此 API 获取蓝牙连接的设备列表？

【参考方案1】：

终于解决了。下面是一些使用BluetoothHeadset API 获取蓝牙音频连接设备的代码 sn-ps。

BluetoothHeadset mBluetoothHeadset;

// Get the default adapter
BluetoothAdapter mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();

// Establish connection to the proxy.
mBluetoothAdapter.getProfileProxy(context, mProfileListener, BluetoothProfile.HEADSET);

// Define Service Listener of BluetoothProfile
private BluetoothProfile.ServiceListener mProfileListener = new BluetoothProfile.ServiceListener() 
    public void onServiceConnected(int profile, BluetoothProfile proxy) 
        if (profile == BluetoothProfile.HEADSET) 
            mBluetoothHeadset = (BluetoothHeadset) proxy;
        
    
    public void onServiceDisconnected(int profile) 
        if (profile == BluetoothProfile.HEADSET) 
            mBluetoothHeadset = null;
        
    
;

// call functions on mBluetoothHeadset to check if Bluetooth SCO audio is connected.
List<BluetoothDevice> devices = mBluetoothHeadset.getConnectedDevices();                        
for ( final BluetoothDevice dev : devices )            
     return mBluetoothHeadset.isAudioConnected(dev);

// finally Close proxy connection after use.
mBluetoothAdapter.closeProfileProxy(BluetoothProfile.HEADSET, mBluetoothHeadset);

【讨论】：

这是一个很好的解决方案..正如上面评论中所说，恭喜;)

我正在使用类似的解决方案，但是当我通过后退按钮退出我的应用程序后尝试连接时，我看到了E/BluetoothA2dp﹕ Could not bind to Bluetooth A2DP Service with Intent act=android.bluetooth.IBluetoothA2dp cmp=com.android.bluetooth/.a2dp.A2dpService 。我确信这一定与没有正确清理有关，但由于我很小心地打电话给closeProfileProxy，我不确定它可能是什么。这是你见过的吗？

【参考方案2】：

首先你需要在 Androindmanifest.xml 中定义 Permission

<uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />
<uses-permission android:name="android.permission.BLUETOOTH" />

搜索连接的设备活动，

private static BluetoothAdapter mBtAdapter;
private final static int REQUEST_ENABLE_BT = 1;

            // Register for broadcasts when a device is discovered
            IntentFilter filter = new IntentFilter(BluetoothDevice.ACTION_FOUND);
            this.registerReceiver(mReceiver, filter);

            // Register for broadcasts when discovery has finished
            filter = new IntentFilter(BluetoothAdapter.ACTION_DISCOVERY_FINISHED);
            this.registerReceiver(mReceiver, filter);


            filter = new IntentFilter( BluetoothAdapter.ACTION_DISCOVERY_STARTED );
            this.registerReceiver( mReceiver, filter );

BroadCastReceiver 类

private final BroadcastReceiver mReceiver = new BroadcastReceiver() 

    @Override
    public void onReceive(Context context, Intent intent) 
    
        try
        
            String action = intent.getAction();

            // When discovery finds a device
            if ( BluetoothDevice.ACTION_FOUND.equals(action) ) 
            
                // Get the BluetoothDevice object from the Intent
                BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
            
        
        catch ( Exception e )
        
            logger.info( DateFormat.format( ConstantCodes.dateFormat ,new java.util.Date()).toString(),"Broadcast Error : " + e.toString(), ConstantCodes.SEARCH_ACTIVITY );
            System.out.println ( "Broadcast Error : " + e.toString() );
        
    
;

【讨论】：

我想获取连接到我的安卓手机的蓝牙设备列表...每次用户点击按钮时。

你打电话给谁connected devices？你的意思是配对？

连接音频电话是什么意思？

我想获取状态为STATE_AUDIO_CONNECTED的蓝牙设备

好的，意思是你只想连接耳机之类的音频蓝牙设备，是吗？