Android蓝牙不安全Rfcomm的"服务发现失败"

Question

Android蓝牙不安全Rfcomm的"服务发现失败"

Mat*_*att 13 android bluetooth insecure-connection

有没有人知道如何在API级别2.3.3的2个Android设备之间创建不安全的RFCOMM连接,同时使用任意声明的服务名称？(不是随机或更改服务名称,只是我自己定义的服务名称)

细节

我试图在2个Android设备之间创建一个不安全的Rfcomm连接:Droid X2和华硕Transformer.我假设这两款设备都具有Android 2.3.3级别的功能,实际上可以使用不安全的Rfcomm.

当我尝试按照此处所述创建蓝牙连接时,使用now public createInsecureRfcommSocketToServiceRecord()和listenUsingInsecureRfcommWithServiceRecord(SERVICE,UUID),我得到一个报告:

java.io.IOException: Service discovery failed
at android.bluetooth.BluetoothSocket$SdpHelper.doSdp(BluetoothSocket.java:377)
at android.bluetooth.BluetoothSocket.connect(BluetoothSocket.java:201)
at com.s4d.bluenomad.DeviceConnections$ClientThread.run(DeviceConnections.java:406)

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我发现了一个相关的问题,即有人创建正常连接时会收到此错误并使用反射来调用私有方法.但是,我不知道现在的私有方法会对应于启动"不安全"连接.我尝试使用相关问题中提出的解决方案,但Android要求我配对设备,这正是我需要避免的.我确实需要不安全的方法.

我甚至尝试了这里概述的官方和黑客解决方案的组合

相关代码片段

创建ServerThread以侦听连接

Log.i(TAG, "Constructing a ServerThread");
// Use a temporary object that is later assigned to serverSocket,
// because serverSocket is final
BluetoothServerSocket tmp = null;
try {
    // MY_UUID is the app's UUID string, also used by the client code
    tmp = btAdapter.listenUsingInsecureRfcommWithServiceRecord(SERVICE_NAME, SERVICE_UUID);
    Log.i(TAG,"Started listening on insecure RFCOMM channel for service requests for: " + SERVICE_NAME);
} catch (IOException e) { }
serverSocket = tmp;

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ServerThread侦听连接

BluetoothSocket socket;
while(true)
{
    try
    {
        socket = serverSocket.accept();
    }
    catch( IOException e)
    {
        break;
    }

    if( socket != null )
    {
        Log.i(TAG, "Received new socket connection requesting service: " + SERVICE_NAME);
    }
    else
    {
        Log.i(TAG, "Socket connection attempted, but socket received is NULL.");
    }
}

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创建ClientThread以启动连接

Log.i(TAG, "Constructing a ClientThread");
BluetoothSocket tmp = null;
try {
    // MY_UUID is the app's UUID string, also used by the server code
    tmp = device.createInsecureRfcommSocketToServiceRecord(SERVICE_UUID);
    Log.i(TAG,"Created client socket on insecure RFCOMM channel for service requests for: " + SERVICE_NAME);
} 
catch (IOException e) 
{ 
    Log.i(TAG, "Failed to createInsecureRfcommSocket() against MAC: " + device.getAddress());
}
clientSocket = tmp;

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ClientThread连接到服务器

try
{
    clientSocket.connect();
}
catch( final IOException e)
{
    DeviceConnections.this.runOnUiThread(new Runnable()
    {

        @Override
        public void run() 
        {
            console.append("Client unable to connect to service.");
            Log.i(TAG, "Client socket unable to connect() to: " + clientSocket.getRemoteDevice().getAddress());
            e.printStackTrace();
        }

    });

}

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我得到日志输出"客户端套接字无法连接()到:[MY_MAC_ADDRESS]",然后我得到"服务发现失败"异常的堆栈跟踪.