title: How to create programmatically an A2DP connection or how can I emulate an Android phone to be an A2DP sink?
body: <p>I have two android phones (Samsung Galaxy Tab and HTC Desire). Both 2.2. The Galaxy Tab should be an A2DP sink and the Desire the source. My aim is to route the sound of the Desire to the Galaxy. I just saw in the API that it is possible to establish a RFCOMM connection. But I want to establish an A2DP connection. My requirements to the solution is that none of the phones should be rooted.</p>
  
  <p>I found in the source code the <a href="http://grepcode.com/file/repository.grepcode.com/java/ext/com.google.android/android/2.2_r1.1/android/bluetooth/BluetoothUuid.java?av=f" rel="noreferrer">Bluetooth UUID</a> class. And I tried to open a A2DP Connection with the UUIDs.</p>
  
  <p>This is the code of the server side:</p>
  
  <pre><code>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();
      }
  </code></pre>
  
  <p>Code of the client side:</p>
  
  <pre><code>Method m = device.getClass().getMethod("createRfcommSocket", new Class[] { int.class });
  tmp = (BluetoothSocket) m.invoke(device, Integer.valueOf(1));
  </code></pre>
  
  <p>I could pair both devices and could create a connection. If I go to the bluetooth settings of the Desire and long press on the Galaxy Tab, I have the menu OPTIONS. I can see the media profile. Then if tried to check the connection box to connect the device with the selected profiles I get following log:</p>
  
  <pre><code>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-&gt;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-&gt;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 ####
  </code></pre>
  
  <p>Does anyone know what I am doing wrong?
  A general question is it possible to connect two Android phones via Bluetooth and stream from one phone to the other? Do you have any alternative approaches?</p>
  
  <p>Thanks</p>