我只是试图通过蓝牙套接字进行读写,但我的readBytes调用未完成。我认为这很简单,但也许我只是使用了错误类型的流或其他内容。截至目前,我的代码仅发送少量文本作为字节。这是占位符代码,将替换为通过流写入和读取文件的代码。这是我的接收线程:

class ReceiveThread(val inStream:BufferedInputStream):Thread() {

var bytes:ByteArray? = null


override fun run() {
    BluetoothService.log("Begin ${BTS_Constants.THREAD_RECEIVE}")
    BluetoothService.log("preparing to read data")
    name = BTS_Constants.THREAD_RECEIVE

//here is my new code
    inStream.use {
        do{
            count++
            BluetoothService.log("read loop round $count")
            byteList.add(it.read() as Byte)
        }while (it.available()>0)
     }
    BluetoothService.log("data read: ${byteList.get(0) as Char}")
}
}

这是我的发送线程:
class SendThread(val outStream:BufferedOutputStream, val file:File? = null):Thread(){

var bytes:ByteArray? = null

override fun run() {
    BluetoothService.log("Begin : ${BTS_Constants.THREAD_SEND}")
    name = BTS_Constants.THREAD_SEND

    bytes = "hello testing".toByteArray()
    try{
        outStream.use {
            it.write(bytes)
            it.flush()
        }
    }catch (ioe:IOException){

    }

    BluetoothService.log("data sent")
}

}

数据已成功发送,并且BluetoothService.log("data sent")调用已到达并在运行发送线程的设备的logcat中显示。对于运行“接收线程”的设备,将记录“正在准备读取数据”消息,但从不记录data read: "$bytes message"

我如何才能完成对inStream.readBytes()的调用?

编辑:我收到的新错误消息:
11-27 23:45:29.298 16253-16413/com.example.zemcd.fileblue E/AndroidRuntime: FATAL EXCEPTION: RECEIVE
                                                                        Process: com.example.zemcd.fileblue, PID: 16253
                                                                        java.io.IOException: bt socket closed, read return: -1
                  at android.bluetooth.BluetoothSocket.read(BluetoothSocket.java:588)
                  at android.bluetooth.BluetoothInputStream.read(BluetoothInputStream.java:96)
                  at java.io.BufferedInputStream.fill(BufferedInputStream.java:235)
                  at java.io.BufferedInputStream.read(BufferedInputStream.java:254)
                  at com.example.zemcd.fileblue.ReceiveThread.run(BluetoothService.kt:230)

最佳答案

如果查看Kotlin扩展功能 readBytes 的源代码,您会发现它在InputStream.read(buffer) > 0时开始循环。根据documentation:



此循环的第二次迭代将冻结您的程序。
所以不要使用readBytes方法。只是read(buffer)
例如-https://developer.android.com/guide/topics/connectivity/bluetooth.html#ManagingAConnection

更新:

现在ReceiveThread可以从流中接收一条消息。但是您的蓝牙 socket 很近。因此,您的问题出在设置蓝牙连接和inStream的初始化中。也许您发送的部分也有误。

09-28 00:02