问题描述
我是新来的Android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.
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