我是新来的Andr​​oid编程，并有java的概念，我想知道，我怎么能发送和接收使用蓝牙数据，而无需配对或任何密码（只有两个设备已经安装了我的应用程序）， 任何建议？

I am new to Android programming, and have java concept, I want to know that how can I send and receive data using bluetooth without pairing or any password (Only if both device has my app installed), any suggestion?

推荐答案

据我知道这是不可能送的或的接收通过RFCOMM插座数据，而无需配对。我试过这个广泛的与我开发的应用程序。我的结果是：

As far as I know it's impossible to send or receive data over RFCOMM sockets without pairing. I've tried this extensively with an application that I'm developing. My results are:

如果两个设备配对，并发现，双向通信是可能 如果两个设备配对，但服务器的设备（一个Android设备正在尝试连接到）设置为没有的发现，那么双向通信仍然是可能的 如果两个设备没有配对，但服务器设备的是的发现，则配对请求仍然需要之前的双向通信是可能的。这意味着，RFCOMM的客户的插座（即那些从Android的）要求进行配对的设备。运行Android 2.2这是测试的三星Captivate的。我觉得这很奇怪，因为我能理解，需要配对允许RFCOMM的服务器插槽，但需要对配对的客户的插座是有点苛刻了。 If the two devices are paired and discoverable, bi-directional communication is possible If the two devices are paired, but the "server" device (the one the android device is trying to connect to) is set to be not discoverable, then bi-directional communication is still possible If the two devices are not paired, but the "server" device is discoverable, then a pairing request is still required before bi-directional communication is possible. This means that RFCOMM client sockets (i.e., those from Android) require the devices to be paired. This was tested on a Samsung Captivate running Android 2.2. I find this very strange, as I can understand requiring pairing before allowing RFCOMM server sockets, but requiring pairing for client sockets is a bit stringent.

由于@ethrbunny提到你也可以只用无线网络，设置并行服务器/客户端线程每个设备上，和发送任何你想要的。要在本地网络中，您可以选择使用零配置上发现服务。

As @ethrbunny mentioned you can also just use WiFi, setup parallel server/client threads on each device, and send whatever you want. To discover services on a local network you can optionally use zeroconf.