我有一个简单的音频记录器应用程序，当我停止记录时，希望立即通过蓝牙将记录的文件发送到手机。
但是我缺少什么，我也不知道。
它基于用C编写的示例本机ui应用程序，这是我到目前为止所做的：
在_app_resume_cb():中我设置了以下回调：
int error_code = bt_adapter_foreach_bonded_device(bonded_device_cb, NULL);
dlog_print(DLOG_INFO, LOG_TAG, "bt_adapter_foreach_bonded_device. error code: %s", get_error_message(error_code));
error_code = bt_socket_set_connection_state_changed_cb(socket_connection_state_changed_cb,NULL);
dlog_print(DLOG_INFO, LOG_TAG, "registered bt_socket_set_connection_state_changed_cb. error code: %s", get_error_message(error_code));
然后在我的bonded_device_cb()中，我阅读了remote_address和service_uuid
static bool bonded_device_cb(bt_device_info_s *device_info, void *user_data)
{
dlog_print(DLOG_INFO, LOG_TAG, "got a bonded device! \n"
"remote_address: %s \n"
"remote_name: %s \n"
"service_uuid: %s \n"
"is_bonded: %d \n"
"is_connected: %d \n"
"is_authorized: %d \n",
device_info->remote_address,
device_info->remote_name,
*device_info->service_uuid,
device_info->is_bonded,
device_info->is_connected,
device_info->is_authorized);
remote_address = malloc((sizeof(device_info->remote_address)*strlen(device_info->remote_address))+1);
service_uuid = malloc((sizeof(*device_info->service_uuid)*strlen(*device_info->service_uuid))+1);
strcpy(remote_address, device_info->remote_address);
strcpy(service_uuid, *device_info->service_uuid);
dlog_print(DLOG_INFO, LOG_TAG, "copied!! remote_address: %s, service_uuid: %s", remote_address, service_uuid);
return true;
}
稍后再在_app_resume_cb()中使用它以便使用bt_socket_connect_rfcomm()：
dlog_print(DLOG_INFO, LOG_TAG, "remote_address: %s, service_uuid: %s", remote_address, service_uuid);
error_code = bt_socket_connect_rfcomm(remote_address, service_uuid);
dlog_print(DLOG_INFO, LOG_TAG, "bt_socket_connect_rfcomm. error code: %s", get_error_message(error_code));
所以连接error_code成功，并且在我的socket_connection_state_changed_cb()中读取了socket_fd：
static void socket_connection_state_changed_cb(int result, bt_socket_connection_state_e connection_state,
bt_socket_connection_s *connection, void *user_data)
{
dlog_print(DLOG_INFO, LOG_TAG, "socket connection state changed \n"
"result: %s "
"connection_state: %d "
"socket_fd: %d "
"server_fd: %d "
"remote_address: %s "
"local_role: %d "
"service_uuid: %s ",
get_error_message(result),
connection_state,
connection->socket_fd,
connection->server_fd,
connection->remote_address,
connection->local_role,
connection->service_uuid);
socket_fd = connection->socket_fd;
}
然后用于通过bt_socket_send_data()发送数据。我按下停止记录按钮后发送数据：
...
/* Stop the recorder and save the recorded data to a file */
if (_recorder_expect_state(g_recorder, RECORDER_STATE_RECORDING)
|| _recorder_expect_state(g_recorder, RECORDER_STATE_PAUSED))
{
char *filez;
recorder_get_filename(g_recorder, &filez);
stop_recorder();
dlog_print(DLOG_INFO, LOG_TAG, "stopped recording");
Eina_Bool shared = EINA_FALSE;
Eina_File * ein_file = eina_file_open(filez, shared);
size_t fil_size = eina_file_size_get(ein_file);
const char * fil_name = eina_file_filename_get(ein_file);
dlog_print(DLOG_INFO, LOG_TAG, "****opened file?, filez: %s fil_size: %d, fil_name: %s", filez, fil_size, fil_name);
error_code = bt_socket_send_data(socket_fd, data, fil_size);
dlog_print(DLOG_INFO, LOG_TAG, "****sending file!!!!! number of bytes written: %d", error_code);
...
并且在日志中，我可以看到正确打印的文件名和大小。
某些日志打印输出：
got a bonded device! remote_address: 34:2D:0D:12:BB:89 remote_name: Galaxy S8 service_uuid: 00001105-0000-1000-8000-00805F9B34FB is_bonded: 1 is_connected: 1 is_authorized: 0
socket connection state changed result: Successful connection_state: 0 socket_fd: 40 server_fd: -1 remote_address: 34:2D:0D:12:BB:89 local_role: 2 service_uuid: 00001105-0000-1000-8000-00805F9B34FB
...
remote_address: 34:2D:0D:12:BB:89, service_uuid: 00001105-0000-1000-8000-00805F9B34FB
bt_socket_connect_rfcomm. error code: Successful
...
****opened file?, filez: /opt/usr/media/Documents/AUDIO_2019_12_12_18_39_27.3gp fil_size: 835, fil_name: /opt/usr/media/Documents/AUDIO_2019_12_12_18_39_27.3gp
****sending file!!!!! number of bytes written: 835
除非在电话中我是“默默地”完成的，否则我从不会收到“接收文件”的请求？我对此表示高度怀疑。我尝试手动搜索文件，但无济于事。
请告诉我我在想什么！
最诚挚的问候，
Helban
要将特定文件发送到远程设备，应使用“ OPP客户端” API而不是RFCOMM套接字客户端API。 RFCOMM API只是发送消息。也许，Android的套接字服务器仅收到“ FileName”字符串。
您可以在bt_socket_connect_rfcomm API调用位置使用下一个代码吗？
static void _adapter_opp_client_push_responded_cb(int result, const char *remote_address, void *data)
{
DBG(" _adapter_opp_client_push_responded_cb ");
}
static void _adapter_opp_client_push_progress_cb(const char *file, long long size, int percent, void *data)
{
DBG(" _adapter_opp_client_push_progress_cb ");
}
static void _adapter_opp_client_push_finished_cb(int result, const char *remote_address, void *data)
{
DBG(" _adapter_opp_client_push_finished_cb ");
}
result = bt_opp_client_initialize();
result = bt_opp_client_add_file(get_shared_resource_path(this->view->tbt_info->file_name));
result = bt_opp_client_push_files(this->selected_device_info->remote_address, _adapter_opp_client_push_responded_cb, _adapter_opp_client_push_progress_cb, _adapter_opp_client_push_finished_cb, this);
但是很遗憾，“ Tizen可穿戴式”不支持“ OPP”功能。 （可能不包括OPP的特定守护程序，因此下一个OPP功能将为false）
https://www.tizen.org/feature?langredirect=1-> http://tizen.org/feature/network.bluetooth.opp
这意味着，即使您如上所述修改了代码。 API将返回“不支持”。
**目前，无法在已发布的产品中启用该功能。
即使由于功能限制而无法使用本机BT OPP API，也可以使用随附的API。 （SAP API）
您可以在下一个URL中引用并获取其完整信息。https://developer.samsung.com/galaxy-watch/develop/samples/companion/file-native