Android端同單片機利用藍牙模塊的通信實現(xiàn)這次期末的課程設(shè)計做了一個智能燈光控制系統(tǒng)，系統(tǒng)整體的功能不在此贅述，系統(tǒng)主要是要實現(xiàn)下位機同上位機的通信，上位機選用的是Android手機端，下位機是52單片機，通過藍牙模塊實現(xiàn)通信。雖然系統(tǒng)很簡單，但還是第一次完成的走完從下位機數(shù)據(jù)采集，數(shù)據(jù)傳輸，再到上位機的處理這個流程，故在這里做一個記錄，也希望能夠幫到有需要的人。一、下位機通信下位機選用的是52單片機，數(shù)據(jù)來自幾個傳感器，傳感器采集到數(shù)據(jù)后通過串口發(fā)送到藍牙模塊，然后藍牙模塊發(fā)送到上位機。因代碼量較大，所以只在這里貼出傳輸有關(guān)的函數(shù)。//利用串口發(fā)送一個字符voidSendOneByte(unsignedcharc){SBUF=c;while(!TI);TI=0;}//重寫putchar函數(shù)，就可以直接調(diào)用printf（）函數(shù)向串口發(fā)送數(shù)據(jù)，程序自動將printf（）中的數(shù)據(jù)轉(zhuǎn)換成char調(diào)用putchar發(fā)送charputchar(charch){ES=0;SBUF=ch;while(!TI);TI=0;ES=1;return0;}//初始化串口voidInitUART(){TMOD=0x20;PCON=0x00;SCON=0x50;TH1=0xFD;TL1=0xFD;TR1=1;ES=1;EA=1;}//串口中斷voidUARTInterrupt()interrupt4{//RI為1則表示串口接收到數(shù)據(jù)if(RI){RI=0;r_buf=SBUF;//價格SBUF中的數(shù)據(jù)賦給r_buf,然后就可以對數(shù)據(jù)進行處理}}voidmain(){InitUART();while(1){}}二、藍牙模塊藍牙模塊我選用的是HC-05，這個模塊我之前也沒用使用過，查詢了一些資料后就能夠上手了，感覺還是很好用。模塊有六個引腳，如果用的是帶一個小按鈕的HC-05，EN就不用接；然后VCC和GND分別接電源和地；TXD和RXD在配置AT指令的時候分別接單片機的TXD和RXD，但是在正常使用時，HC-05的TXD和RXD分別接單片機的RXD和TXD，這個需要注意；還有一個引腳是state，當有藍牙連接的時候會置1，將其隨意連接到單片機的引腳上。使用前先利用AT指令集配置模塊，設(shè)置波特率和主從模式等，然后就可以連線使用。連接后藍牙模塊會進入快閃模式，進入AT指令集后會進入慢閃模式，當有藍牙設(shè)備連接后會進入雙閃模式。三、Android端程序Android端主要就是接受數(shù)據(jù)，做出一定處理，還需發(fā)送指令給單片機。我用的代碼也是在網(wǎng)上找的然后又做了一些修改，源代碼出處找不到了。主要代碼如下：1、DeveiceListActivity類publicclassDeviceListActivityextendsActivity{//調(diào)試用privatestaticfinalStringTAG="DeviceListActivity";privatestaticfinalbooleanD=true;//返回時數(shù)據(jù)標簽publicstaticStringEXTRA_DEVICE_ADDRESS="設(shè)備地址";//成員域privateBluetoothAdaptermBtAdapter;privateArrayAdapter<String>mPairedDevicesArrayAdapter;privateArrayAdapter<String>mNewDevicesArrayAdapter;@OverrideprotectedvoidonCreate(BundlesavedInstanceState){super.onCreate(savedInstanceState);//創(chuàng)建并顯示窗口requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);//設(shè)置窗口顯示模式為窗口方式setContentView(R.layout.device_list);//設(shè)定默認返回值為取消setResult(Activity.RESULT_CANCELED);//設(shè)定掃描按鍵響應(yīng)ButtonscanButton=(Button)findViewById(R.id.button_scan);scanButton.setOnClickListener(newOnClickListener(){publicvoidonClick(Viewv){doDiscovery();v.setVisibility(View.GONE);}});//初使化設(shè)備存儲數(shù)組mPairedDevicesArrayAdapter=newArrayAdapter<String>(this,R.layout.device_name);mNewDevicesArrayAdapter=newArrayAdapter<String>(this,R.layout.device_name);//設(shè)置已配隊設(shè)備列表ListViewpairedListView=(ListView)findViewById(R.id.paired_devices);pairedListView.setAdapter(mPairedDevicesArrayAdapter);pairedListView.setOnItemClickListener(mDeviceClickListener);//設(shè)置新查找設(shè)備列表ListViewnewDevicesListView=(ListView)findViewById(R.id.new_devices);newDevicesListView.setAdapter(mNewDevicesArrayAdapter);newDevicesListView.setOnItemClickListener(mDeviceClickListener);//注冊接收查找到設(shè)備action接收器IntentFilterfilter=newIntentFilter(BluetoothDevice.ACTION_FOUND);this.registerReceiver(mReceiver,filter);//注冊查找結(jié)束action接收器filter=newIntentFilter(BluetoothAdapter.ACTION_DISCOVERY_FINISHED);this.registerReceiver(mReceiver,filter);//得到本地藍牙m(xù)BtAdapter=BluetoothAdapter.getDefaultAdapter();}@OverrideprotectedvoidonDestroy(){super.onDestroy();//關(guān)閉服務(wù)查找if(mBtAdapter!=null){mBtAdapter.cancelDiscovery();}//注銷action接收器this.unregisterReceiver(mReceiver);}publicvoidOnCancel(Viewv){finish();}/***開始服務(wù)和設(shè)備查找*/privatevoiddoDiscovery(){if(D)Log.d(TAG,"doDiscovery()");//在窗口顯示查找中信息setProgressBarIndeterminateVisibility(true);setTitle("查找設(shè)備中...");//顯示其它設(shè)備（未配對設(shè)備）列表findViewById(R.id.title_new_devices).setVisibility(View.VISIBLE);//關(guān)閉再進行的服務(wù)查找if(mBtAdapter.isDiscovering()){mBtAdapter.cancelDiscovery();}//并重新開始mBtAdapter.startDiscovery();}//選擇設(shè)備響應(yīng)函數(shù)privateOnItemClickListenermDeviceClickListener=newOnItemClickListener(){publicvoidonItemClick(AdapterView<?>av,Viewv,intarg2,longarg3){//準備連接設(shè)備，關(guān)閉服務(wù)查找mBtAdapter.cancelDiscovery();//得到mac地址Stringinfo=((TextView)v).getText().toString();Stringaddress=info.substring(info.length()-17);//設(shè)置返回數(shù)據(jù)Intentintent=newIntent();intent.putExtra(EXTRA_DEVICE_ADDRESS,address);//設(shè)置返回值并結(jié)束程序setResult(Activity.RESULT_OK,intent);finish();}};//查找到設(shè)備和搜索完成action監(jiān)聽器privatefinalBroadcastReceivermReceiver=newBroadcastReceiver(){@OverridepublicvoidonReceive(Contextcontext,Intentintent){Stringaction=intent.getAction();//查找到設(shè)備actionif(BluetoothDevice.ACTION_FOUND.equals(action)){//得到藍牙設(shè)備BluetoothDevicedevice=intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);//如果是已配對的則略過，已得到顯示，其余的在添加到列表中進行顯示if(device.getBondState()!=BluetoothDevice.BOND_BONDED){mNewDevicesArrayAdapter.add(device.getName()+"\n"+device.getAddress());}else{//添加到已配對設(shè)備列表mPairedDevicesArrayAdapter.add(device.getName()+"\n"+device.getAddress());}//搜索完成action}elseif(BluetoothAdapter.ACTION_DISCOVERY_FINISHED.equals(action)){setProgressBarIndeterminateVisibility(false);setTitle("選擇要連接的設(shè)備");if(mNewDevicesArrayAdapter.getCount()==0){StringnoDevices="沒有找到新設(shè)備";mNewDevicesArrayAdapter.add(noDevices);}}}};}

2、Client類publicclassBTClientextendsActivity{privatefinalstaticintREQUEST_CONNECT_DEVICE=1;//宏定義查詢設(shè)備句柄privatefinalstaticStringMY_UUID="00001101-0000-1000-8000-00805F9B34FB";//SPP服務(wù)UUID號privateInputStreamis;//輸入流，用來接收藍牙數(shù)據(jù)privateEditTextedit0;//發(fā)送數(shù)據(jù)輸入句柄privateTextViewlightSwitch;privateTextViewlightStrength;privateTextViewlightMode;privateTextViewlightPower;privateStringswitchMsg="";privateStringstrengthMsg="";privateStringmodeMsg="";BluetoothDevice_device=null;//藍牙設(shè)備BluetoothSocket_socket=null;//藍牙通信socketbooleanbRun=true;booleanbThread=false;booleantimesign=false;privateBluetoothAdapter_bluetooth=BluetoothAdapter.getDefaultAdapter();//獲取本地藍牙適配器，即藍牙設(shè)備/**Calledwhentheactivityisfirstcreated.*/@OverridepublicvoidonCreate(BundlesavedInstanceState){super.onCreate(savedInstanceState);setContentView(R.layout.main);//設(shè)置畫面為主畫面main.xmledit0=(EditText)findViewById(R.id.Edit0);//得到輸入框句柄lightSwitch=(TextView)findViewById(R.id.lightSwitch);lightStrength=(TextView)findViewById(R.id.lightStrength);lightMode=(TextView)findViewById(R.id.lightMode);lightPower=(TextView)findViewById(R.id.lightpower);lightSwitch.setText("關(guān)閉");lightStrength.setText("8");lightMode.setText("時間調(diào)節(jié)模式");lightPower.setText("無數(shù)據(jù)");//如果打開本地藍牙設(shè)備不成功，提示信息，結(jié)束程序if(_bluetooth==null){Toast.makeText(this,"無法打開手機藍牙，請確認手機是否有藍牙功能！",Toast.LENGTH_LONG).show();finish();return;}//設(shè)置設(shè)備可以被搜索newThread(){publicvoidrun(){if(_bluetooth.isEnabled()==false){_bluetooth.enable();}}}.start();}//發(fā)送按鍵響應(yīng)publicvoidonSendButtonClicked(Viewv){try{OutputStreamos=_socket.getOutputStream();//藍牙連接輸出流modeMsg=edit0.getText().toString();if(modeMsg.equals("1")||modeMsg.equals("2")||modeMsg.equals("3")){if(modeMsg.equals("1")){lightMode.setText("手動調(diào)節(jié)模式");lightPower.setText("無數(shù)據(jù)");timesign=false;}elseif(modeMsg.equals("2")){lightMode.setText("自動調(diào)節(jié)模式");timesign=false;}elseif(modeMsg.equals("3")){lightMode.setText("時間調(diào)節(jié)模式");lightPower.setText("無數(shù)據(jù)");}}if(timesign){finalinttimec=Integer.valueOf(modeMsg).intValue()*1000;//CountDownTimercdt=newCountDownTimer(timec,timec){//@Override//publicvoidonTick(longmillisUntilFinished){//}////@Override//publicvoidonFinish(){//edit0.setText("3");//}//};//cdt.start();try{Thread.currentThread().sleep(timec);}catch(InterruptedExceptione){e.printStackTrace();}edit0.setText("3");}if(modeMsg.equals("3")&&!timesign)timesign=true;byte[]bos=edit0.getText().toString().getBytes();edit0.setText("");os.write(bos);}catch(IOExceptione){}}//接收活動結(jié)果，響應(yīng)startActivityForResult()publicvoidonActivityResult(intrequestCode,intresultCode,Intentdata){switch(requestCode){caseREQUEST_CONNECT_DEVICE://連接結(jié)果，由DeviceListActivity設(shè)置返回//響應(yīng)返回結(jié)果if(resultCode==Activity.RESULT_OK){//連接成功，由DeviceListActivity設(shè)置返回//MAC地址，由DeviceListActivity設(shè)置返回Stringaddress=data.getExtras().getString(DeviceListActivity.EXTRA_DEVICE_ADDRESS);//得到藍牙設(shè)備_device=_bluetooth.getRemoteDevice(address);//用服務(wù)號得到sockettry{_socket=_device.createRfcommSocketToServiceRecord(UUID.fromString(MY_UUID));}catch(IOExceptione){Toast.makeText(this,"連接失敗！",Toast.LENGTH_SHORT).show();}//連接socketButtonbtn=(Button)findViewById(R.id.Button03);try{_socket.connect();Toast.makeText(this,"連接"+_device.getName()+"成功！",Toast.LENGTH_SHORT).show();btn.setText("斷開");}catch(IOExceptione){try{Toast.makeText(this,"連接失敗！",Toast.LENGTH_SHORT).show();_socket.close();_socket=null;}catch(IOExceptionee){Toast.makeText(this,"連接失敗！",Toast.LENGTH_SHORT).show();}return;}//打開接收線程try{is=_socket.getInputStream();//得到藍牙數(shù)據(jù)輸入流}catch(IOExceptione){Toast.makeText(this,"接收數(shù)據(jù)失敗！",Toast.LENGTH_SHORT).show();return;}if(bThread==false){ReadThread.start();bThread=true;}else{bRun=true;}}break;default:break;}}//接收數(shù)據(jù)線程ThreadReadThread=newThread(){publicvoidrun(){intnum=0;byte[]buffer=newbyte[1024];bRun=true;//接收線程while(true){try{while(is.available()==0){while(bRun==false){}}while(true){num=is.read(buffer);//讀入數(shù)據(jù)Strings=newString(buffer,0,num);switchMsg=s;strengthMsg=s;if