通过蓝牙从winRT发送文件到android / WP设备

时间:2014-03-03 07:26:02

标签: c# bluetooth windows-runtime

我正在开发一个Windows应用商店应用并尝试通过蓝牙将文件发送到Android(和Windows手机)设备。

基于example from MSDN我写了以下代码:

public async static void SendAsync(StorageFile file)
{
    var id = RfcommDeviceService.GetDeviceSelector(RfcommServiceId.ObexObjectPush);
    var devices = await DeviceInformation.FindAllAsync(id);
    // -> Returns one windows phone and two android devices

    if (devices.Count > 0)
    {
        // Use the 3th device (android tablet)
        var service = await RfcommDeviceService.FromIdAsync(devices[2].Id);

         // Create a socket and connect to the target
         using (var socket = new StreamSocket())
         {
            await socket.ConnectAsync(
                service.ConnectionHostName,
                service.ConnectionServiceName,
                SocketProtectionLevel.BluetoothEncryptionAllowNullAuthentication);


            byte[] bytes;
            using (var stream = await file.OpenStreamForReadAsync())
            {
                // stream.Length = 4621038
                bytes = new Byte[stream.Length];

                await stream.ReadAsync(bytes, 0, bytes.Length);
            }

            using (var dataWriter = new DataWriter(socket.OutputStream))
            {
                dataWriter.WriteBytes(bytes);
                Debug.WriteLine("Sending data...");
                var result = await dataWriter.StoreAsync();
                var flushed = await dataWriter.FlushAsync();
                dataWriter.DetachStream();
                Debug.WriteLine("Sending data finished. Result: " + result + " flushed: " +     flushed);
                // Output: 
                // Sending data...
                // Sending data finished. Result: 4621038 flushed: True
            }
        }
    }
}

Package.appxmanifest看起来像:

<m2:DeviceCapability Name="bluetooth.rfcomm">
    <m2:Device Id="any">
        <m2:Function Type="name:obexObjectPush" />
        <m2:Function Type="name:obexFileTransfer" />
        <m2:Function Type="name:genericFileTransfer" />
    </m2:Device>
</m2:DeviceCapability>

运行代码时,似乎工作正常。该应用程序询问“可能[AppName]使用您的[DeviceName]?”并且字节似乎是发送的(dataWriter.StoreAsync()返回要发送的字节数。)

Android设备将被激活(灯亮)一秒钟。但就是这样。我希望在Android设备上得到一个请求,如:“Windows 8尝试发送文件,接受是/否”,但我没有。

发送的文件不在Android设备上(通常情况下,通过蓝牙发送的文件位于蓝牙文件夹中)。

你有什么想法让它发挥作用/发现错误吗?

谢谢, 扬

2 个答案:

答案 0 :(得分:0)

刚才简短的说明。 OBEX有一个协议,它不只是发送原始文件。我会稍后再写,但我们会看到类似的东西:

CONNECT->
<-OK
PUT+filename+data->
<-CONTINUE
PUT+FINAL+data->
<-OK
disconnect

答案 1 :(得分:0)

您必须实施obex协议连接,放置,断开操作才能执行此操作。 请参考此线程: Send data through Bluetooth windows 10 universal app