安卓串口中InputStream数据接收不完整

串口读数组本身就很可能需要读几次才能读完，建议是写一个拼接数据的方法，每次记录读取的数据和数据的长度

一开始的写法如下会出现串口读取断开情况

protected class LReadThread extends Thread {        @Override        public void run() {            super.run();            while (!interrupted()) {                int size;                try {                    //处理读取                    byte[] buffer = new byte[64];                    if (lInputStream == null)                        return;                    size = lInputStream.read(buffer);                    if (size > 0) {                        onDataReceived(buffer, size, 0);                    }                } catch (IOException e) {                    e.printStackTrace();                }            }        }    }

然后百度之后写法如下不过这个写法要求你的卡号是\n结尾的

  protected class LReadThread extends Thread {        @Override        public void run() {            super.run();            while (!interrupted()) {                int bytes;                int ch;//读取字符串变量                try {                    if (lInputStream == null)                        return;                    //处理读取                    byte[] buffer = new byte[64];                    bytes=0;                    while ((ch = lInputStream.read()) != '\n'){                        if (ch != -1) {                            buffer[bytes] = (byte) ch;                            bytes++;                        }                    }                    buffer[bytes] = '\n';                    bytes++;                    if (bytes > 0) {                        onDataReceived(buffer, bytes, 0);                    }                } catch (IOException e) {                    e.printStackTrace();                }            }        }    }

上面的有限制，所以呢大部分的可以是使用下面的代码处理，flag 是自己添加的区分那一个线程，

还有就是byte 大于8的问题，这个看自己要读取卡号的大小自己添加判断就行

private class MReadThread extends Thread {        @Override        public void run() {            super.run();            while (!isInterrupted()) {                try {                    if (mInputStream == null)                        return;                    byte[] buffer = new byte[64];                    int mcount;                    if (mInputStream.available() <= 0) {                        continue;                    } else {                        Thread.sleep(300);                    }                    mcount = mInputStream.read(buffer);                    if (mcount > 8) {                        onDataReceived(buffer, mcount, 1);                    }                } catch (IOException e) {                    e.printStackTrace();                    return;                } catch (InterruptedException e) {                    e.printStackTrace();                    return;                }            }        }    }

参考链接非常感谢

https://blog.csdn.net/clliu_hust/article/details/80874272

https://blog.csdn.net/lilidejing/article/details/37913627

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