在Android程序中可以实现自动扫描蓝牙、配对蓝牙、建立数据通道。
蓝牙分不同类型,可以参考(http://gqdy365.iteye.com/admin/blogs/2229304)
可以入下面方法获取蓝牙设备支持的类型:
- BluetoothDevice device;
- Arrays.toString(device.getUuids());
我的蓝牙音箱支持的类型有:
- 0000111e-0000-1000-8000-00805f9b34fb:Handsfree
- 0000110b-0000-1000-8000-00805f9b34fb:AudioSink
- 0000110e-0000-1000-8000-00805f9b34fb:AVRemoteControl
- 00001203-0000-1000-8000-00805f9b34fb:GenericFileTransfer
这篇文字只讨论如何与蓝牙耳机(蓝牙音箱)连接。
蓝牙耳机一般都支持A2DP(蓝牙立体声,用于音乐播放)、HFP协议(通话),参考:http://gqdy365.iteye.com/admin/blogs/2231553
所以下面操作要同时操作A2DP和HFP,两个都连接成功,才算连接成功;
一、A2DP的操作可以分三步:
1、扫描蓝牙设备:
注册并监听广播:
- BluetoothAdapter.ACTION_DISCOVERY_STARTED
- BluetoothDevice.ACTION_FOUND
- BluetoothAdapter.ACTION_DISCOVERY_FINISHED
启动扫描:
- BluetoothAdapter.getDefaultAdapter().startDiscovery();
对扫描的结果按类型进行筛选,只保留我们需要的蓝牙耳机:
- if(device.getBluetoothClass().getDeviceClass() == BluetoothClass.Device.AUDIO_VIDEO_WEARABLE_HEADSET
- || device.getBluetoothClass().getDeviceClass() == BluetoothClass.Device.AUDIO_VIDEO_HANDSFREE){
- //蓝牙耳机
- }
2、配对指定的蓝牙设备:
这个跟配对普通蓝牙一样,方法如下:
- public static boolean createBond(BluetoothDevice btDevice){
- boolean result = false;
- try{
- Method m = btDevice.getClass().getDeclaredMethod(“createBond”,new Class[]{});
- m.setAccessible(true);
- Boolean originalResult = (Boolean) m.invoke(btDevice);
- result = originalResult.booleanValue();
- }catch(Exception ex){
- }
- return result;
- }
等配对完成之后就是要建立数据连接;
3、建立数据连接:
if you SDK between 11 and 16.call a2dp.connectSink(btDevice) or a2dp.connect(btDevice)
- private static IBluetoothA2dp getIBluetoothA2dp() {
- IBluetoothA2dp ibta = null;
- try {
- final Class serviceManager = Class.forName(“android.os.ServiceManager”);
- final Method getService = serviceManager.getDeclaredMethod(“getService”, String.class);
- final IBinder iBinder = (IBinder) getService.invoke(null, “bluetooth_a2dp”);
- final Class iBluetoothA2dp = Class.forName(“android.bluetooth.IBluetoothA2dp”);
- final Class[] declaredClasses = iBluetoothA2dp.getDeclaredClasses();
- final Class c = declaredClasses[0];
- final Method asInterface = c.getDeclaredMethod(“asInterface”, IBinder.class);
- asInterface.setAccessible(true);
- ibta = (IBluetoothA2dp) asInterface.invoke(null, iBinder);
- } catch (final Exception e) {
- Log.e(“Error ” + e.getMessage());
- }
- return ibta;
- }
参考:http://stackoverflow.com/questions/8467178/working-around-a2dp-and-hfp-limitations-of-android-pre-honeycomb
如果API大于16需要用如下的方法:
- private void initA2dpService(){
- // Intent i = getExplicitIntent(mContext,new Intent(IBluetoothA2dp.class.getName()));//5.0以上系统需要显示intent
- //详细参考http://blog.csdn.net/l2show/article/details/47421961
- Intent i = new Intent(IBluetoothA2dp.class.getName());
- boolean success = mContext.bindService(i, mConnection, Context.BIND_AUTO_CREATE);
- if (success) {
- } else {
- }
- }
- public ServiceConnection mConnection = new ServiceConnection() {
- @Override
- public void onServiceConnected(ComponentName name, IBinder service) {
- try {
- mA2dpService = IBluetoothA2dp.Stub.asInterface(service);
- } catch (Exception e) {
- e.printStackTrace();
- }
- }
- @Override
- public void onServiceDisconnected(ComponentName name) {
- // TODO Auto-generated method stub
- }
- };
- public Intent getExplicitIntent(Context context, Intent implicitIntent) {
- // Retrieve all services that can match the given intent
- PackageManager pm = context.getPackageManager();
- List<ResolveInfo> resolveInfo = pm.queryIntentServices(implicitIntent, 0);
- // Make sure only one match was found
- if (resolveInfo == null || resolveInfo.size() != 1) {
- return null;
- }
- // Get component info and create ComponentName
- ResolveInfo serviceInfo = resolveInfo.get(0);
- String packageName = serviceInfo.serviceInfo.packageName;
- String className = serviceInfo.serviceInfo.name;
- ComponentName component = new ComponentName(packageName, className);
- // Create a new intent. Use the old one for extras and such reuse
- Intent explicitIntent = new Intent(implicitIntent);
- // Set the component to be explicit
- explicitIntent.setComponent(component);
- return explicitIntent;
- }
建立连接:mA2dpService.connect(device);
断开连接:mA2dpService.disconnect(device);
参考:http://stackoverflow.com/questions/14705167/how-connect-paired-bluetooth-a2dp-device-on-android-4-2-using-reflection
http://blog.csdn.net/qs_csu/article/details/45114251
二、HFP操作:
下面只针对4.0及以上版本;
1、初始化:
- private void initOrCloseBtCheck(boolean init){
- if(init){
- mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
- mBluetoothAdapter.getProfileProxy(mContext, new 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;
- }
- }
- },BluetoothProfile.HEADSET);
- }else{
- mBluetoothAdapter.closeProfileProxy(BluetoothProfile.HEADSET,mBluetoothHeadset);
- }
- }
建立连接:
- Method m = mBluetoothHeadset.getClass().getDeclaredMethod(“connect”,BluetoothDevice.class);
- m.setAccessible(true);
- //连接Headset
- boolean successHeadset = (Boolean)m.invoke(mBluetoothHeadset, device);
断开连接:
- Method m = mBluetoothHeadset.getClass().getDeclaredMethod(“disconnect”,BluetoothDevice.class);
- m.setAccessible(true);
- m.invoke(mBluetoothHeadset, device);
三、状态判断:
蓝牙耳机连接成功:
- mA2dpService.getConnectionState(device) == BluetoothA2dp.STATE_DISCONNECTED && mBluetoothHeadset.getConnectionState(device) == BluetoothProfile.STATE_DISCONNECTED
断开成功:
- (mA2dpService.getConnectionState(device) == BluetoothA2dp.STATE_CONNECTED || mA2dpService.getConnectionState(device) == BluetoothA2dp.STATE_PLAYING)
- && mBluetoothHeadset.getConnectionState(device) == BluetoothProfile.STATE_CONNECTED