本文将带你了解Android应用开发之Android蓝牙上位机实现发送指令与接收信息功能的方法，希望本文对大家学Android有所帮助。

现市面上的蓝牙模块基本都相同，开发者只需要下载本文源程序，然后按如下注释处，更改发送指令的内容就可以了。
//发送按键响应 public void onSendButtonClicked(View   v){    try{        OutputStream   os = _socket.getOutputStream();//蓝牙连接输出流        byte[] bos =   {0X53,0x4E,0x06,0x00,0x04,0x05,0x00,0x00,0x0F};  //花括号内是要发送的指令，根据需要更改，这里是我随便输入的        os.write(bos);        }catch(IOException   e){                }    }
下面是接收数据线程，接收数据转换为16进制数的字符串进行显示，在注释的代码部分，若要修改数据显示的编码方式，在此处。
//接收数据线程  Thread ReadThread=new Thread(){               public void   run(){          int num =   0;          byte[] buffer = new   byte[1024];          byte[]   buffer_new = new byte[1024];            int i = 0;            int n = 0;            bRun = true;            //接收线程            while(true){                try{                    while(is.available()==0){                        while(bRun   == false){}                    }                    while(true){                        num   = is.read(buffer);         //读入数据                        n=0;                        for(i=0;i<num;i++){                            if((buffer[i]   == 0x0d)&&(buffer[i+1]==0x0a)){                              buffer_new[n]   = 0x0a;                                i++;                            }else{                                buffer_new[n]   = buffer[i];                          }                            n++;                        }                        String   s = "";                            for   (int i = 0; i < bos.length; i++)                       {                            String   hex = Integer.toHexString(bos[i] & 0xFF);                            if   (hex.length() == 1)                           {                                hex   = '0' + hex;                            }                            s   += hex.toUpperCase()+" ";                             }              //  for循环和Integer.toHexString()方法实现byte数组转换成16进制字符串                        smsg+=s;     //写入接收缓存                        if(is.available()==0)break;    //短时间没有数据才跳出进行显示                    }                    //发送显示消息，进行显示刷新                        handler.sendMessage(handler.obtainMessage());                                           }catch(IOException   e){                  }            }        }  }    

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