Android使用inputStream从蓝牙读取

发布于 2024-11-29 11:19:31 字数 1101 浏览 1 评论 0原文

我编写了一个程序，通过 SPP 不断从蓝牙读取数据，并将流中的内容打印到编辑文本框中。我有以下线程：

myTimer = new Timer();
myTimer.schedule(new TimerTask(){
   @Override
   public void run(){
     TimerMethod();
   }
},0,1000);

private void TimerMethod(){this.runOnUiThread(startReading);}


private Runnable startReading = new Runnable(){

    public void run(){
        EditText _txtArea = (EditText) findViewById(R.id._txtArea);
    try{
        inStream = btSocket.getInputStream();
    }catch (IOException e3) {
        _txtArea.append("inStream establishment Failed!");

    }

现在传入的消息可以是任意大小，我想继续阅读，直到没有任何内容可供阅读。我尝试了一个实现，我做了这样的事情：

   byte[] msgIn = new byte[15];
   inStream.read(msgIn, 0, 15);
            int len = msgIn.length;
            for (int i=0; i<len; i++){
                out = new Character ((char) msgIn[i]).toString();       
                _txtArea.append(out);

但这将读取限制为 15 个字节，并且代码似乎不是很有效。如果有人想知道为什么我有以下行 out = new Character ((char) msgIn[i]).toString();这是因为传入的数据是 ASCII 格式，我将其转换为字符。读取完所有内容后，当没有其他内容可读取时，也使用此方法，程序会挂起。有谁知道我可以继续阅读直到所有数据都被读取的方法吗？

原文

I have written a program that constantly reads from the Bluetooth via SPP and prints the contents in the stream to a edittext box. I have the following thread:

myTimer = new Timer();
myTimer.schedule(new TimerTask(){
   @Override
   public void run(){
     TimerMethod();
   }
},0,1000);

private void TimerMethod(){this.runOnUiThread(startReading);}


private Runnable startReading = new Runnable(){

    public void run(){
        EditText _txtArea = (EditText) findViewById(R.id._txtArea);
    try{
        inStream = btSocket.getInputStream();
    }catch (IOException e3) {
        _txtArea.append("inStream establishment Failed!");

    }

Now the msg's incoming can be of any size and I want to keep reading until there isn't anything remaining to be read. I tried an implementation where i did something like this:

   byte[] msgIn = new byte[15];
   inStream.read(msgIn, 0, 15);
            int len = msgIn.length;
            for (int i=0; i<len; i++){
                out = new Character ((char) msgIn[i]).toString();       
                _txtArea.append(out);

But that limits the read to 15 bytes and the code doesn't seem very effecient. If anyone is wondering why i have the following line out = new Character ((char) msgIn[i]).toString(); it's because the data coming in is in ASCII i am converting it to a char. Also using this method after reading all of the contents when there is nothing else to read the program hangs. Does anyone know a way i can keep reading until all of the data has been read?

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