我有两部Android手机(三星Galaxy Tab和HTC Desire)。两者均2.2。 Galaxy Tab应该是A2DP接收器，而Desire是源。我的目标是将“欲望”的声音传递到银河系。我刚刚在API中看到可以建立RFCOMM连接。但是我想建立一个A2DP连接。我对解决方案的要求是，所有电话都不应该 Root 。
我在源代码中找到了Bluetooth UUID类。我试图用UUID打开A2DP连接。
这是服务器端的代码:
private class AcceptThread extends Thread {
public AcceptThread() {
try {
BluetoothServerSocket mmServerSocket = btAdapter.listenUsingRfcommWithServiceRecord("Audio Sink", UUID.fromString("0000110B-0000-1000-8000-00805F9B34FB")); // UUID of Audio sink
mmServerSocket = btAdapter.listenUsingRfcommWithServiceRecord(
"AVCRP Controller", UUID.fromString("0000110E-0000-1000-8000-00805F9B34FB")); // UUID of AVCRP Controller
} catch (IOException e) {
}
}
public void run() {
// Keep listening until exception occurs or a socket is returned
while (true) {
try {
socket = mmServerSocket.accept();
} catch (IOException e) {
break;
}
// If a connection was accepted
if (socket != null) {
try {
mmServerSocket.close();
} catch (IOException e) {
e.printStackTrace();
}
客户端代码:
Method m = device.getClass().getMethod("createRfcommSocket", new Class[] { int.class });
tmp = (BluetoothSocket) m.invoke(device, Integer.valueOf(1));
我可以配对两个设备，并可以建立连接。如果我转到Desire的蓝牙设置并长按“Galaxy”选项卡，则会显示菜单OPTIONS。我可以看到媒体资料。然后，如果尝试检查连接框以将设备与所选配置文件连接，则会收到以下日志:
04-11 17:21:18.994: DEBUG/DTUN_HCID4(1233): dtun_client_get_remote_services()
04-11 17:21:18.994: INFO/DTUN_HCID4(1233): dtun_client_get_remote_services: Get remote services on
04-11 17:21:18.994: INFO/DTUN_CLNT(1233): Client calling DTUN_METHOD_DM_GET_REMOTE_SERVICES (id 5)
04-11 17:21:18.994: INFO/(1220): DTUN_ReceiveCtrlMsg: [DTUN] Received message [BTLIF_DTUN_METHOD_CALL] 4354
04-11 17:21:18.994: INFO/(1220): handle_method_call: handle_method_call :: received DTUN_METHOD_DM_GET_REMOTE_SERVICES (id 5), len 6
04-11 17:21:18.994: ERROR/BTLD(1220): ****************search UUID = 1108***********
04-11 17:21:18.994: WARN/BTLD(1220): ccb timer ticks: 0
04-11 17:21:19.005: INFO//system/bin/btld(1219): btapp_dm_GetRemoteServices()
04-11 17:21:19.005: INFO//system/bin/btld(1219): ##### USerial_Ioctl: BT_Wake, 0x8003 ####
04-11 17:21:19.125: WARN/BTLD(1220): process_service_search_attr_rsp
04-11 17:21:19.144: WARN/BTLD(1220): ccb timer ticks: 0
04-11 17:21:19.155: ERROR/BTLD(1220): ****************search UUID = 111e***********
04-11 17:21:19.155: WARN/BTLD(1220): ccb timer ticks: 0
04-11 17:21:19.287: WARN/BTLD(1220): process_service_search_attr_rsp
04-11 17:21:19.287: WARN/BTLD(1220): ccb timer ticks: 0
04-11 17:21:19.336: ERROR/BTLD(1220): ****************search UUID = 110b***********
04-11 17:21:19.336: WARN/BTLD(1220): ccb timer ticks: 0
04-11 17:21:19.474: WARN/BTLD(1220): process_service_search_attr_rsp
04-11 17:21:19.474: WARN/BTLD(1220): ccb timer ticks: 0
04-11 17:21:19.534: INFO/BTL-IFS(1220): send_ctrl_msg: [BTL_IFS CTRL] send BTLIF_DTUN_SIGNAL_EVT (CTRL) 14 pbytes (hdl 15)
04-11 17:21:19.534: INFO/DTUN_HCID4(1233): dtun_dm_sig_rmt_services: success=1, service=00040040
04-11 17:21:19.534: DEBUG/DTUN_HCID4(1233): Adding UUID 0000111E-0000-1000-8000-00805F9B34FB
04-11 17:21:19.534: DEBUG/DEVICE(1233): Just add the profiles for /org/bluez/1233/hci0/dev_xx_xx_xx_xx_xx_xx
04-11 17:21:19.534: INFO/DTUN_HCID4(1233): Adding uuid 0000111E-0000-1000-8000-00805F9B34FB
04-11 17:21:19.534: DEBUG/DTUN_HCID4(1233): Adding UUID 0000110B-0000-1000-8000-00805F9B34FB
04-11 17:21:19.534: DEBUG/DEVICE(1233): Just add the profiles for /org/bluez/1233/hci0/dev_xx_xx_xx_x_xx_xx
04-11 17:21:19.534: INFO/DTUN_HCID4(1233): Adding uuid 0000110B-0000-1000-8000-00805F9B34FB
04-11 17:21:19.534: INFO/DTUN_HCID4(1233): Calling sink_init
04-11 17:21:19.534: DEBUG/ADAPTER(1233): adapter_get_device(Xx:xx:xx:xx:xx:xx)
04-11 17:21:19.534: DEBUG/DEVICE(1233): btd_device_ref(0xfa10): ref=2
04-11 17:21:19.534: INFO/DTUN_HCID4(1233): sink_init
04-11 17:21:19.534: DEBUG/DTUN_HCID4(1233): Registered interface org.bluez.AudioSink on path /org/bluez/1233/hci0/dev_xx_xx_xx_xx_xx_xx
04-11 17:21:19.544: ERROR/BluetoothEventLoop.cpp(96): event_filter: Received signal org.bluez.Device:PropertyChanged from /org/bluez/1233/hci0/dev_xx_xx_xx_xx_xx_xx
04-11 17:21:19.544: DEBUG/BluetoothService(96): updateDeviceServiceChannelCache(xx:xx:xx:xx:xx:xx)
04-11 17:21:19.554: INFO/DEVICE(1233): pattern = 0000111e-0000-1000-8000-00805f9b34fb, id = 4
04-11 17:21:19.564: DEBUG/BluetoothService(96): uuid(system): 0000111e-0000-1000-8000-00805f9b34fb 4382
04-11 17:21:19.574: VERBOSE/BluetoothEventRedirector(492): Received android.bleutooth.device.action.UUID
04-11 17:21:19.700: WARN/BTLD(1220): ccb timer ticks: 0
04-11 17:21:20.615: INFO//system/bin/btld(1219): ##### USerial_Ioctl: BT_Sleep, 0x8004 ####
04-11 17:21:24.634: DEBUG/dalvikvm(594): GC_EXPLICIT freed 46 objects / 2320 bytes in 50ms
04-11 17:21:24.675: INFO/System.out(1336): public android.bluetooth.BluetoothA2dp(android.content.Context)
04-11 17:21:24.684: DEBUG/BluetoothA2dpService(96): connectSink(xx:xx:xx:xx:xx:xx)
04-11 17:21:24.684: INFO/BluetoothA2dpService(96): checkSinkSuspendState() : state = 1 prevState = 0
04-11 17:21:24.684: INFO/BluetoothA2dpService(96): checkSinkSuspendState() : mTargetA2dpState = -1
04-11 17:21:24.684: INFO/BluetoothA2dpService(96): checkSinkSuspendState() : initialStart = false initialSuspend = false
04-11 17:21:24.694: VERBOSE/BluetoothEventRedirector(492): Received android.bluetooth.a2dp.action.SINK_STATE_CHANGED
04-11 17:21:24.694: DEBUG/CachedBluetoothDevice(492): onProfileStateChanged:[]
04-11 17:21:24.705: DEBUG/BluetoothA2dpService(96): A2DP state : device: BC:47:60:0F:4B:F3 State:0->1
04-11 17:21:24.705: INFO/DTUN_CLNT(1233): Client calling DTUN_METHOD_AM_AV_OPEN (id 20)
04-11 17:21:24.705: INFO/(1220): DTUN_ReceiveCtrlMsg: [DTUN] Received message [BTLIF_DTUN_METHOD_CALL] 4354
04-11 17:21:24.705: INFO/(1220): handle_method_call: handle_method_call :: received DTUN_METHOD_AM_AV_OPEN (id 20), len 6
04-11 17:21:24.705: ERROR/BTLD(1220): reset flags
04-11 17:21:24.705: WARN/BTLD(1220): ccb timer ticks: 0
04-11 17:21:24.705: DEBUG/DTUN_HCID4(1233): stream creation in progress
04-11 17:21:24.714: INFO//system/bin/btld(1219): ##### USerial_Ioctl: BT_Wake, 0x8003 ####
04-11 17:21:24.958: WARN/BTLD(1220): process_service_search_attr_rsp
04-11 17:21:25.017: WARN/BTLD(1220): ccb timer ticks: 0
04-11 17:21:25.227: ERROR/BTLD(1220): bta_av_rc_create ACP handle exist for shdl:0
04-11 17:21:25.325: WARN/BTLD(1220): bta_dm_rm_cback:0, status:1
04-11 17:21:25.325: WARN/BTLD(1220): bta_dm_act no entry for connected service cbs
04-11 17:21:25.325: INFO/BTL-IFS(1220): send_ctrl_msg: [BTL_IFS CTRL] send BTLIF_DTUN_SIGNAL_EVT (CTRL) 44 pbytes (hdl 15)
04-11 17:21:25.325: WARN/BTLD(1220): btui_av_callback(BTA_AV_OPEN_EVT::FAILED (page-timeout or protocol)::status: 3
04-11 17:21:25.325: INFO/DTUN_HCID4(1233): pending
04-11 17:21:25.325: INFO/DTUN_HCID4(1233): orig_msg = e588
04-11 17:21:25.325: ERROR/BluetoothA2dpService.cpp(96): onConnectSinkResult: D-Bus error: org.bluez.Error.Failed (Stream connection failed)
04-11 17:21:25.325: INFO/BluetoothA2dpService(96): checkSinkSuspendState() : state = 0 prevState = 1
04-11 17:21:25.325: INFO/BluetoothA2dpService(96): checkSinkSuspendState() : mTargetA2dpState = -1
04-11 17:21:25.325: INFO/BluetoothA2dpService(96): checkSinkSuspendState() : initialStart = false initialSuspend = false
04-11 17:21:25.334: VERBOSE/BluetoothEventRedirector(492): Received android.bluetooth.a2dp.action.SINK_STATE_CHANGED
04-11 17:21:25.334: INFO/BluetoothEventRedirector(492): Failed to connect BT A2DP
04-11 17:21:25.334: DEBUG/CachedBluetoothDevice(492): onProfileStateChanged:[]
04-11 17:21:25.334: DEBUG/BluetoothA2dpService(96): A2DP state : device: BC:47:60:0F:4B:F3 State:1->0
04-11 17:21:25.925: INFO//system/bin/btld(1219): ##### USerial_Ioctl: BT_Sleep, 0x8004 ####
04-11 17:21:26.775: WARN/BTLD(1220): ccb timer ticks: 2147483648
04-11 17:21:26.785: INFO//system/bin/btld(1219): ##### USerial_Ioctl: BT_Wake, 0x8003 ####
04-11 17:21:27.725: INFO//system/bin/btld(1219): ##### USerial_Ioctl: BT_Sleep, 0x8004 ####
有人知道我在做什么错吗？
一个普遍的问题是，是否可以通过蓝牙连接两部Android手机并从一部手机流向另一部手机？您有其他替代方法吗？
谢谢
最佳答案
您不能通过RFCOMM / SPP来完成它-仅连接到A2DP UUID是不够的-需要执行配置文件连接/配置文件级别协议(protocol)过程来实现A2DP-超过A2DP的更多内容可以直接通过L2CAP protocol进行操作(并且不需要RFCOMM)。
您可能无法在两部电话之间手动进行操作，因为要流式传输一台设备需要是A2DP接收器，而其他A2DP源则必须是电话，而电话通常只是源设备(可以流向接收器设备的流的源)是Headsets或Bluetooth speakers。
关于android - 如何以编程方式创建A2DP连接，或者如何将Android手机模拟为A2DP接收器？，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/5623699/