android蓝牙连接createRfcommSocketToServiceRecord方法抛出异常问题

研究android蓝牙连接时，在网上找了个例子，作为客户端在调用connect函数时失败。经查资料

将

socket = device.createRfcommSocketToServiceRecord(UUID.fromString("a60f35f0-b93a-11de-8a39-08002009c666"));

改为

Method m;
            try {
                m = device.getClass().getMethod("createRfcommSocket", new Class[] {int.class});
                try {
                    socket = (BluetoothSocket) m.invoke(device, 1);
                    _bluetooth.cancelDiscovery();
                    try {
                        socket.connect();
                    } catch (IOException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }
                } catch (IllegalArgumentException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                } catch (IllegalAccessException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                } catch (InvocationTargetException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            } catch (SecurityException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            } catch (NoSuchMethodException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }

就可以连接。

 

 

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注释： 实际上tmp = (BluetoothSocket)m.invoke(device,Integer.valueof(可以使用的端口号));这个命令的参数意义。另外实际上第一种socket创建方法是错误的，第2种才是正确的。