蓝牙连接丢失错误

时间:2012-09-11 23:55:56

标签: android bluetooth

我写了一个正常的代码来连接标准的蓝牙设备(一个wocket)。我正在做的是连接到wocket(它只是一块蓝牙芯片),作为客户端。我使用随机UUID连接到wocket。但是连接方法抛出一个IO异常,告诉我它无法连接到蓝牙设备。我使用的代码来自Android开发者论坛: http://developer.android.com/guide/topics/connectivity/bluetooth.html

私有类ConnectThread扩展Thread {     私人最终BluetoothSocket mmSocket;     私人最终的BluetoothDevice mmDevice;

public ConnectThread(BluetoothDevice device) {
    // Use a temporary object that is later assigned to mmSocket,
    // because mmSocket is final
    BluetoothSocket tmp = null;
    mmDevice = device;

    // Get a BluetoothSocket to connect with the given BluetoothDevice
    try {
        // MY_UUID is the app's UUID string, also used by the server code
        tmp = device.createRfcommSocketToServiceRecord(MY_UUID);
    } catch (IOException e) { }
    mmSocket = tmp;
}

public void run() {
    // Cancel discovery because it will slow down the connection
    mBluetoothAdapter.cancelDiscovery();

    try {
        // Connect the device through the socket. This will block
        // until it succeeds or throws an exception
        mmSocket.connect();
        **This call is throwing and IOException saying:
        java.io.IOException Discovery Failed.

**

    } catch (IOException connectException) {
        // Unable to connect; close the socket and get out
        try {
            mmSocket.close();
        } catch (IOException closeException) { }
        return;
    }

    // Do work to manage the connection (in a separate thread)
    manageConnectedSocket(mmSocket);
}

/** Will cancel an in-progress connection, and close the socket */
public void cancel() {
    try {
        mmSocket.close();
    } catch (IOException e) { }
}

}

wocket抛出IOException的原因可能是什么。我认为连接到它是服务器没有任何意义,因为你建立一个UUID的服务器,然后你希望客户端具有相同的UUID,这在我的情况下是不可能的,因为我不能编程wocket。

我正在使用HTC one x和Android 4.0作为测试设备。

提前谢谢。

1 个答案:

答案 0 :(得分:0)

尽管使用随机UUID,但使用串行端口配置文件的UUID,即“00001101-0000-1000-8000-00805f9b34fb”,因为您使用的随机UUID可能不受wocket支持。当你做的时候

createRfcommSocketToServiceRecord(MY_UUID);

它在您要连接的设备上执行服务发现,并查看您提供的UUID是否在设备中,如果存在则连接到设备。