问题描述
我是 Android 编程的新手，并且有 java 概念，我想知道如何使用蓝牙发送和接收数据而无需配对或任何密码(仅当两台设备都安装了我的应用程序时)，有什么建议吗?
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
据我所知，如果没有配对，就不可能通过 RFCOMM 套接字发送或数据.我已经对我正在开发的应用程序进行了广泛的尝试.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:
- 如果两台设备配对且可发现，则可以进行双向通信
- 如果两个设备已配对，但服务器"设备(Android 设备尝试连接的那个)设置为不可发现，那么双向通信仍然是可能的
- 如果两个设备未配对，但服务器"设备可发现，则在双向通信成为可能之前仍需要配对请求.这意味着 RFCOMM 客户端 套接字(即来自 Android 的套接字)需要设备配对.这是在运行 Android 2.2 的三星 Captivate 上进行的测试.我觉得这很奇怪，因为我可以理解在允许 RFCOMM 服务器套接字之前需要配对，但要求对客户端套接字进行配对有点严格.
- 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.
正如@ethrbunny 提到的，你也可以只使用 WiFi，在每个设备上设置并行服务器/客户端线程，然后发送任何你想要的.要发现本地网络上的服务，您可以选择使用 zeroconf.
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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