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android 蓝牙模块的串口通信_andoird bluetoothdevice 串口通讯

作者：知新_RL | 2024-03-12 18:42:38

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andoird bluetoothdevice 串口通讯


一直先想做一个遥控车，正好放假了，所以这些日子有时间，然后就搜集资料，找到一个博客，忘记是哪个了博主写的了，然后就试这写一下，

做完后一运行就是就Bug ,就是当终端蓝牙开启的时候，打开这个软件时，Android 顿时弹出来个大的ANR ，然后我改了改，没这种毛病了，然后又添了一些，比如当在蓝牙关闭的状态上打开软件，软件自动会打开蓝牙。

挺好玩的的。


一共分两个Activityu第一个是搜索蓝牙进行配对操作，第二个就是发送cdm了。

我用的是Android Studio写的所以不必担心添加权限的问题，如果你是用Eclipse写的那么一定不要忘了添加这两条权限：

<uses-permission android:name="android.permission.BLUETOOTH"/>
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/>

在打开、关闭搜索，配对中主要是用到了两个类：BlueToothAdapter,和 BlueToothSocket这两个类。

里面有一个UUID也不知道是什么东西查API解释是UUID是128位的不可变表示全局惟一标识符(UUID)。什么魔鬼？？望指教。

看代码吧。


一、Mainactivity.xml文件往下看的

  1. <?xml version="1.0" encoding="utf-8"?>
  2. <RelativeLayout
  3.     xmlns:android="http://schemas.android.com/apk/res/android"
  4.     xmlns:tools="http://schemas.android.com/tools"
  5.     android:layout_width="match_parent"
  6.     android:layout_height="match_parent"
  7.     android:paddingBottom="@dimen/activity_vertical_margin"
  8.     android:paddingLeft="@dimen/activity_horizontal_margin"
  9.     android:paddingRight="@dimen/activity_horizontal_margin"
  10.     android:paddingTop="@dimen/activity_vertical_margin"
  11.     tools:context="com.example.hejingzhou.newbuledemo.MainActivity"
  12.     android:background="@drawable/bac">
  13.  
  14.     <Switch
  15.         android:layout_width="50dp"
  16.         android:layout_height="wrap_content"
  17.         android:id="@+id/switchOpenAndClose"
  18.         android:textOff="关闭"
  19.         android:textOn="打开"
  20.         android:checked="false"
  21.         android:layout_alignParentTop="true"
  22.         android:layout_toRightOf="@+id/textView"
  23.         android:layout_toEndOf="@+id/textView"/>
  24.  
  25.     <Button
  26.         android:layout_width="match_parent"
  27.         android:layout_height="wrap_content"
  28.         android:text="允许本设备对外可见"
  29.         android:id="@+id/buttonVisible"
  30.         android:layout_below="@+id/switchOpenAndClose"
  31.         android:layout_centerHorizontal="true"/>
  32.  
  33.     <Button
  34.         android:layout_width="match_parent"
  35.         android:layout_height="wrap_content"
  36.         android:text="搜索其他的设备"
  37.         android:id="@+id/buttonSeraveDevice"
  38.         android:layout_below="@+id/buttonVisible"
  39.         android:layout_centerHorizontal="true"/>
  40.  
  41.     <Button
  42.         android:layout_width="match_parent"
  43.         android:layout_height="wrap_content"
  44.         android:text="退出程序"
  45.         android:id="@+id/buttonExit"
  46.  
  47.         android:layout_alignParentBottom="true"
  48.         android:layout_alignParentLeft="true"
  49.         android:layout_alignParentStart="true"/>
  50.  
  51.     <TextView
  52.         android:layout_width="wrap_content"
  53.         android:layout_height="wrap_content"
  54.         android:textAppearance="?android:attr/textAppearanceLarge"
  55.         android:text="蓝牙开关"
  56.         android:textColor="#FFFFFF"
  57.         android:id="@+id/textView"
  58.         android:layout_alignParentTop="true"
  59.         android:layout_alignParentLeft="true"
  60.         android:layout_alignParentStart="true"/>
  61.  
  62.     <ListView
  63.         android:layout_width="wrap_content"
  64.         android:layout_height="wrap_content"
  65.         android:id="@+id/listViewShow"
  66.         android:layout_centerHorizontal="true"
  67.         android:layout_below="@+id/buttonSeraveDevice"
  68.         android:layout_above="@+id/buttonExit"/>
  69.  
  70.  
  71. </RelativeLayout>


二、MainActivity.java

  1. <span style="font-family:SimSun;"><span style="color:#2b2b2b;"><span style="font-size: 18px; line-height: 27px; background-color: rgb(248, 248, 248);"><strong>package com.example.hejingzhou.newbuledemo;
  2.  
  3. </strong></span></span></span><span style="font-size:18px;">import android.bluetooth.BluetoothAdapter;
  4. import android.bluetooth.BluetoothDevice;
  5. import android.bluetooth.BluetoothServerSocket;
  6. import android.bluetooth.BluetoothSocket;
  7. import android.content.BroadcastReceiver;
  8. import android.content.Context;
  9. import android.content.Intent;
  10. import android.content.IntentFilter;
  11. import android.os.*;
  12. import android.os.Process;
  13. import android.support.v7.app.AppCompatActivity;
  14. import android.util.Log;
  15. import android.view.View;
  16. import android.widget.AdapterView;
  17. import android.widget.ArrayAdapter;
  18. import android.widget.Button;
  19. import android.widget.CompoundButton;
  20. import android.widget.ListView;
  21. import android.widget.Switch;
  22. import android.widget.Toast;
  23.  
  24. import java.io.IOException;
  25. import java.lang.reflect.InvocationTargetException;
  26. import java.lang.reflect.Method;
  27. import java.util.ArrayList;
  28. import java.util.List;
  29. import java.util.UUID;
  30.  
  31. public class MainActivity extends AppCompatActivity {
  32.     private Switch aSwitch;
  33.     private Button buttonVisible,buttonSearch,buttonExit;
  34.     private ListView listView;
  35.  
  36.     private Handler handler;
  37.  
  38.     private BluetoothAdapter bluetoothAdapter;
  39.  
  40.     static final String SPP_UUID = "00001101-0000-1000-8000-00805F9B34FB";
  41.     private UUID uuid;
  42.  
  43.     private List<String> listDevice = new ArrayList<>();
  44.     private ArrayAdapter<String> adapterDevice;
  45.  
  46.     private static BluetoothSocket socket;
  47.     public static BluetoothSocket bluetoothSocket;
  48.  
  49.     private static AcceptThread acceptThread;
  50.  
  51.     @Override
  52.     protected void onCreate(Bundle savedInstanceState) {
  53.         super.onCreate(savedInstanceState);
  54.         setContentView(R.layout.activity_main);
  55.         findViewById();
  56.         OnClick();
  57.         bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
  58.         uuid = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB");
  59.         InitBlueTooth();
  60.     }
  61.     /************************************************************************************************************/
  62.     private void OnClick() {
  63.         //Switch开关
  64.         aSwitch.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
  65.             @Override
  66.             public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
  67.                 if (isChecked == true) {
  68.                     if (bluetoothAdapter.getState() == BluetoothAdapter.STATE_ON) {
  69.                         return;
  70.                     } else if (bluetoothAdapter.getState() == BluetoothAdapter.STATE_OFF) {
  71.                         bluetoothAdapter.enable();
  72.                         try {
  73.                             Thread.sleep(3000);
  74.                         } catch (InterruptedException e) {
  75.                             e.printStackTrace();
  76.                         }
  77.                         if (bluetoothAdapter.getState() == BluetoothAdapter.STATE_ON) {
  78.                             Toast.makeText(MainActivity.this, "蓝牙已打开", Toast.LENGTH_SHORT).show();
  79.                         }
  80.                         /***********修改修改**********/
  81.                         try {
  82.                             acceptThread = new AcceptThread();
  83.                             handler = new Handler() {
  84.                                 public void handle(Message message) {
  85.                                     switch (message.what) {
  86.                                         case 0:
  87.                                             acceptThread.start();
  88.                                     }
  89.  
  90.                                 }
  91.  
  92.                             };
  93.                         } catch (Exception e) {
  94.                             Toast.makeText(MainActivity.this, "服务监听出错", Toast.LENGTH_SHORT).show();
  95.                         }
  96.  
  97.                     }
  98.                 } else if (isChecked = false) {
  99.                     bluetoothAdapter.disable();
  100.                     if (bluetoothAdapter.getState() == BluetoothAdapter.STATE_OFF)
  101.                         Toast.makeText(MainActivity.this, "蓝牙已关闭", Toast.LENGTH_SHORT).show();
  102.                 }
  103.             }
  104.         });
  105.         //可见性Button
  106.         buttonVisible.setOnClickListener(new View.OnClickListener() {
  107.             @Override
  108.             public void onClick(View v) {
  109.                 Intent discoverableIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE);
  110.                 discoverableIntent.putExtra(BluetoothAdapter.EXTRA_DISCOVERABLE_DURATION, 300);
  111.                 startActivity(discoverableIntent);
  112.             }
  113.         });
  114.         //搜索设备
  115.         buttonSearch.setOnClickListener(new View.OnClickListener() {
  116.             @Override
  117.             public void onClick(View v) {
  118.                 setTitle("本机蓝牙地址" + bluetoothAdapter.getAddress());
  119.                 listDevice.clear();
  120.                 bluetoothAdapter.startDiscovery();//启动搜索其他蓝牙设备
  121.             }
  122.         });
  123.         //退出Button
  124.         buttonExit.setOnClickListener(new View.OnClickListener() {
  125.             @Override
  126.             public void onClick(View v) {
  127.                 if(bluetoothSocket != null)
  128.                 {
  129.                     try {
  130.                         bluetoothSocket.close();
  131.                     } catch (IOException e) {
  132.                         e.printStackTrace();
  133.                     }
  134.                     MainActivity.this.finish();
  135.                 }
  136.             }
  137.         });
  138.     }
  139.  
  140.     /************************************************************************************************************/
  141.     private void InitBlueTooth() {
  142.         Toast.makeText(MainActivity.this,"正在初始化软件，请稍等...",Toast.LENGTH_SHORT).show();
  143.         
  144.         /*if(bluetoothAdapter == null)
  145.         {
  146.             Toast.makeText(MainActivity.this,"您的蓝牙不可用，请查验您的手机是否具有此功能",Toast.LENGTH_LONG).show();
  147.             return;
  148.         }
  149.         else
  150.         {*/
  151.             if(bluetoothAdapter.getState() == BluetoothAdapter.STATE_OFF)
  152.             {
  153.                 aSwitch.setChecked(false);
  154.                 bluetoothAdapter.enable();
  155.                 if(bluetoothAdapter.getState() == BluetoothAdapter.STATE_ON)
  156.                 {
  157.                     Toast.makeText(MainActivity.this,"成功帮您打开蓝牙",Toast.LENGTH_LONG).show();
  158.                 }else
  159.                 {
  160.                     Toast.makeText(MainActivity.this,"打开蓝牙失败，请手动打开您的蓝牙",Toast.LENGTH_LONG).show();
  161.                 }
  162.  
  163.  
  164.             }else if(bluetoothAdapter.getState() == bluetoothAdapter.STATE_ON)
  165.             {
  166.                 acceptThread = new AcceptThread();
  167.  
  168.                 handler = new Handler()
  169.                 {
  170.                   public void handleMessage(Message msg)
  171.                   {
  172.                       switch (msg.what)
  173.                       {
  174.                           case 0:
  175.                               acceptThread.start();
  176.                               break;
  177.                       }
  178.  
  179.                   }
  180.  
  181.                 };
  182.  
  183.             }
  184.             //注册Receiver蓝牙设备的相关结果
  185.             //IntentFilter结构化的描述意图值匹配。IntentFilter可以匹配操作、类别和数据(通过其类型、计划和/或路径)的意图。它还包括一个“优先级”值用于订单多个匹配过滤器。
  186.             IntentFilter intentFilter = new IntentFilter();
  187.             intentFilter.addAction(BluetoothDevice.ACTION_FOUND);
  188.             intentFilter.addAction(BluetoothDevice.ACTION_BOND_STATE_CHANGED);//广播操作：指示远程设备上的键状态的改变
  189.             intentFilter.addAction(BluetoothAdapter.ACTION_SCAN_MODE_CHANGED);//广播操作：指示本地适配器的蓝牙扫描模式已经改变。
  190.             intentFilter.addAction(BluetoothAdapter.ACTION_STATE_CHANGED);//广播操作：当地蓝牙适配器的状态已更改。
  191.             registerReceiver(serachDevices,intentFilter);
  192.        // }
  193.     }
  194.  
  195.     /**************************************************************************************************************/
  196.     private void findViewById() {
  197.         aSwitch = (Switch)findViewById(R.id.switchOpenAndClose);
  198.         buttonVisible = (Button)findViewById(R.id.buttonVisible);
  199.         buttonSearch = (Button)findViewById(R.id.buttonSeraveDevice);
  200.         buttonExit = (Button)findViewById(R.id.buttonExit);
  201.         listView = (ListView)findViewById(R.id.listViewShow);
  202.         adapterDevice = new ArrayAdapter<String>(MainActivity.this,android.R.layout.simple_list_item_1,listDevice);
  203.         listView.setAdapter(adapterDevice);
  204.         listView.setOnItemClickListener(new ItemClickEvent());//设置ListView 的单击监听
  205.     }
  206.  
  207.     /*************************************************************************************************************/
  208.     class AcceptThread extends Thread
  209.     {
  210.         private final BluetoothServerSocket serverSocket;//蓝牙服务套接口
  211.         public AcceptThread()
  212.         {
  213.             BluetoothServerSocket BTServerSocket = null;
  214.             try {
  215.                 Method listenMethod = bluetoothAdapter.getClass().getMethod("listenUsingRfcommOn",new  Class[]{int.class});
  216.                 BTServerSocket = (BluetoothServerSocket)listenMethod.invoke(bluetoothAdapter,Integer.valueOf(1));
  217.             } catch (NoSuchMethodException e) {
  218.                 e.printStackTrace();
  219.             } catch (InvocationTargetException e) {
  220.                 e.printStackTrace();
  221.             } catch (IllegalAccessException e) {
  222.                 e.printStackTrace();
  223.             }
  224.             serverSocket = BTServerSocket;
  225.         }
  226.         public void run()
  227.         {
  228.             while (true)
  229.             {
  230.                 try {
  231.                     socket = serverSocket.accept();
  232.                     Log.e("MainActivity","socket = serverSocket.accept();错误");
  233.                 } catch (IOException e) {
  234.                    break;
  235.                 }
  236.                 if(socket != null)
  237.                 {
  238.                     manageConnectedSocket();
  239.                     try {
  240.                         serverSocket.close();
  241.                     } catch (IOException e) {
  242.                         e.printStackTrace();
  243.                     }
  244.                     break;
  245.                 }
  246.             }
  247.             Message message = new Message();
  248.             message.what = 0;
  249.             handler.sendMessage(message);
  250.  
  251.         }
  252.  
  253.         public void cancel()
  254.         {
  255.             try {
  256.                 serverSocket.close();
  257.             } catch (IOException e) {
  258.                 Log.e("MainActivity","注销错误");
  259.             }
  260.         }
  261.     }
  262.  
  263.     /*************************************************************************************************************/
  264.     class ItemClickEvent implements AdapterView.OnItemClickListener {
  265.  
  266.         @Override
  267.         public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
  268.             String str = listDevice.get(position);
  269.             String[] values = str.split("\\|");
  270.             String address = values[1];
  271.             Log.i("address",values[1]);
  272.             uuid = UUID.fromString(SPP_UUID);
  273.             Log.i("uuid",uuid.toString());
  274.  
  275.             BluetoothDevice BtDev = bluetoothAdapter.getRemoteDevice(address);//getRemoteDevice获取BluetoothDevice对象从给定的蓝牙硬件地址
  276.             Log.i("获取的蓝牙硬件对象","   "+BtDev);
  277.             Method method;
  278.             try {
  279.                 method = BtDev.getClass().getMethod("createRfcommSocket",new Class[]{int.class});
  280.                 bluetoothSocket = (BluetoothSocket) method.invoke(BtDev,Integer.valueOf(1));
  281.             } catch (NoSuchMethodException e) {
  282.                 e.printStackTrace();
  283.             } catch (InvocationTargetException e) {
  284.                 e.printStackTrace();
  285.             } catch (IllegalAccessException e) {
  286.                 e.printStackTrace();
  287.             }
  288.  
  289.             bluetoothAdapter.cancelDiscovery();//对蓝牙进行信号注销
  290.             try {
  291.                 bluetoothSocket.connect();//蓝牙配对
  292.                 Toast.makeText(MainActivity.this,"连接成功进入控制界面",Toast.LENGTH_SHORT).show();
  293.  
  294.                 Intent intent = new Intent();
  295.                 intent.setClass(MainActivity.this, SendMessageActivity.class);
  296.                 startActivity(intent);
  297.             } catch (IOException e) {
  298.                 e.printStackTrace();
  299.                 Toast.makeText(MainActivity.this,"连接失败",Toast.LENGTH_SHORT).show();
  300.             }
  301.  
  302.         }
  303.     }
  304.     /*************************************************************************************************************/
  305.     /**
  306.      * 基类代码,将收到发送的意图sendBroadcast()。
  307.      */
  308.     private BroadcastReceiver serachDevices = new BroadcastReceiver() {
  309.         @Override
  310.         public void onReceive(Context context, Intent intent) {
  311.             String action = intent.getAction();
  312.             Bundle bundle = intent.getExtras();
  313.             Object[] listName = bundle.keySet().toArray();
  314.  
  315.             //显示收到的消息及细节
  316.             for(int i = 0;i < listName.length;i++)
  317.             {
  318.                 String keyName = listName[i].toString();
  319.                 Log.i(keyName,String.valueOf(bundle.get(keyName)));
  320.             }
  321.             if(BluetoothDevice.ACTION_FOUND.equals(action))
  322.             {
  323.                 BluetoothDevice BTDevice = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
  324.                 String str = BTDevice.getName()+"|"+BTDevice.getAddress();
  325.                 if(listDevice.indexOf(str) == -1)//indexOf检索字符串，如果为null返回-1
  326.                 {
  327.                     listDevice.add(str);
  328.                 }
  329.                 adapterDevice.notifyDataSetChanged();//每次改变刷新一下自己
  330.             }
  331.  
  332.         }
  333.     };
  334.     /*************************************************************************************************************/
  335.     @Override
  336.     protected void onDestroy() {
  337.         this.unregisterReceiver(serachDevices);
  338.         super.onDestroy();
  339.         android.os.Process.killProcess(Process.myPid());//杀死Pid
  340.         acceptThread.cancel();
  341.         acceptThread.destroy();
  342.     }
  343.  
  344.     /*************************************************************************************************************/
  345.     private void manageConnectedSocket()
  346.     {
  347.         bluetoothSocket = socket;
  348.         Intent newActivity = new Intent();
  349.         newActivity.setClass(MainActivity.this,SendMessageActivity.class);
  350.         startActivity(newActivity);
  351.     }
  352.  
  353. }</span><span style="font-family:SimSun;"><span style="color:#2b2b2b;"><span style="font-size: 18px; line-height: 27px; background-color: rgb(248, 248, 248);"><strong>
  354. </strong></span></span></span>

三、sendMessageActivity.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@drawable/ee"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    tools:context="com.example.hejingzhou.newbuledemo.SendMessageActivity">

    <TextView
        android:id="@+id/textView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:text="控制界面"
        android:textAppearance="?android:attr/textAppearanceLarge"/>

    <TextView
        android:id="@+id/textView3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_below="@+id/textView2"
        android:layout_marginTop="42dp"
        android:text="请选择通信对象"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:textSize="15dp"/>

    <RadioGroup
        android:id="@+id/radioGroup"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_alignBottom="@+id/textView3"
        android:layout_alignLeft="@+id/textView2"
        android:layout_alignStart="@+id/textView2"
        android:layout_alignTop="@+id/textView3"
        android:orientation="horizontal">

        <RadioButton
            android:id="@+id/radioPC"
            android:checked="true"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="PC"/>

        <RadioButton
            android:id="@+id/radioMobile"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Mobile"/>
    </RadioGroup>

    <TextView
        android:id="@+id/textView4"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_below="@+id/textView3"
        android:layout_marginTop="62dp"
        android:text="继电器1"/>

    <ToggleButton
        android:id="@+id/toggleButton"
        android:layout_width="75dp"
        android:layout_height="35dp"
        android:checked="false"
        android:layout_alignBottom="@+id/textView4"
        android:layout_toEndOf="@+id/textView4"
        android:layout_toRightOf="@+id/textView4"
        android:text="New ToggleButton"/>

    <TextView
        android:id="@+id/textView5"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBottom="@+id/toggleButton"
        android:layout_alignLeft="@+id/radioGroup"
        android:layout_alignStart="@+id/radioGroup"
        android:layout_marginLeft="38dp"
        android:layout_marginStart="38dp"
        android:text="继电器2"/>

    <ToggleButton
        android:id="@+id/toggleButton2"
        android:layout_width="75dp"
        android:layout_height="35dp"
        android:checked="false"
        android:layout_alignBottom="@+id/textView5"
        android:layout_toEndOf="@+id/textView2"
        android:layout_toRightOf="@+id/textView2"
        android:text="New ToggleButton"/>

    <TextView
        android:id="@+id/textView6"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/textView4"
        android:layout_marginTop="40dp"
        android:layout_toLeftOf="@+id/toggleButton"
        android:layout_toStartOf="@+id/toggleButton"
        android:text="继电器3"/>

    <ToggleButton
        android:id="@+id/toggleButton3"
        android:layout_width="75dp"
        android:layout_height="35dp"
        android:checked="false"
        android:layout_alignBottom="@+id/textView6"
        android:layout_toEndOf="@+id/textView6"
        android:layout_toRightOf="@+id/textView6"
        android:text="New ToggleButton"/>

    <TextView
        android:id="@+id/textView7"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/textView5"
        android:layout_alignStart="@+id/textView5"
        android:layout_alignTop="@+id/textView6"
        android:text="继电器4"/>

    <ToggleButton
        android:id="@+id/toggleButton4"
        android:layout_width="75dp"
        android:layout_height="35dp"
        android:checked="false"
        android:layout_alignBottom="@+id/toggleButton3"
        android:layout_toEndOf="@+id/textView7"
        android:layout_toRightOf="@+id/textView7"
        android:text="New ToggleButton"/>


    <EditText
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/editTextreceive"
        android:hint="接收区"
        android:layout_above="@+id/editTextsend"
        android:layout_alignParentRight="true"
        android:layout_alignParentEnd="true"/>

    <EditText
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/editTextsend"
        android:hint="发送区"
        android:layout_above="@+id/buttonsend"
        android:layout_alignParentRight="true"
        android:layout_alignParentEnd="true"/>

    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="发送"
        android:id="@+id/buttonsend"
        android:layout_above="@+id/buttonback"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"/>

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="返回"
        android:id="@+id/buttonback"
        android:layout_alignParentBottom="true"
        android:layout_alignRight="@+id/textView3"
        android:layout_alignEnd="@+id/textView3"/>

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="关闭"
        android:id="@+id/buttonclose"
        android:layout_alignTop="@+id/buttonback"
        android:layout_toRightOf="@+id/textView7"
        android:layout_toEndOf="@+id/textView7"/>

</RelativeLayout>

四、sendMessageActivity.Java

  1. package com.example.hejingzhou.newbuledemo;
  2. <span style="font-size:18px;">
  3. import android.os.Message;
  4. import android.support.v7.app.AppCompatActivity;
  5. import android.os.Bundle;
  6. import android.util.Log;
  7. import android.view.View;
  8. import android.widget.Button;
  9. import android.widget.CompoundButton;
  10. import android.widget.EditText;
  11. import android.widget.RadioButton;
  12. import android.widget.RadioGroup;
  13. import android.widget.TextView;
  14. import android.widget.Toast;
  15. import android.widget.ToggleButton;
  16.  
  17. import java.io.IOException;
  18. import java.io.InputStream;
  19. import java.io.OutputStream;
  20. import java.io.UnsupportedEncodingException;
  21. import java.util.logging.Handler;
  22.  
  23. public class SendMessageActivity extends AppCompatActivity  implements RadioGroup.OnCheckedChangeListener {
  24.  
  25.     private RadioGroup radioGroup;
  26.     private RadioButton radioPc, radioMo;
  27.     private ToggleButton TB1, TB2, TB3, TB4;
  28.     private EditText EtReceive, EtSend;
  29.     private Button BtSend, BtBack, BtClose;
  30.  
  31.     private android.os.Handler handler;
  32.  
  33.     private String encodeType = "GBK";
  34.     private boolean isRecording = false;
  35.  
  36.     private OutputStream outputStream = null;
  37.     private ConnectedThread connectedThread;
  38.  
  39.     @Override
  40.     protected void onCreate(Bundle savedInstanceState) {
  41.         super.onCreate(savedInstanceState);
  42.         setContentView(R.layout.activity_send_message);
  43.         findViewById();
  44.         StartThread();
  45.         onClickListener();
  46.     }
  47.  
  48.     private void onClickListener() {
  49.         BtClose.setOnClickListener(new View.OnClickListener() {
  50.             @Override
  51.             public void onClick(View v) {
  52.                 try {
  53.                     MainActivity.bluetoothSocket.close();//关闭蓝牙接口
  54.                     connectedThread.Stop();
  55.                     setTitle("蓝牙连接断开");
  56.                 } catch (IOException e) {
  57.                     e.printStackTrace();
  58.                 }
  59.             }
  60.         });
  61.  
  62.         BtBack.setOnClickListener(new View.OnClickListener() {
  63.             @Override
  64.             public void onClick(View v) {
  65.                 SendMessageActivity.this.finish();
  66.             }
  67.         });
  68.  
  69.         TB1.setOnClickListener(new View.OnClickListener() {
  70.             @Override
  71.             public void onClick(View v) {
  72.                 if (TB1.isChecked() == false) {
  73.                     sendMessage("11");
  74.                 } else if (TB1.isChecked() == true) {
  75.                     sendMessage("10");
  76.                 }
  77.             }
  78.         });
  79.         TB2.setOnClickListener(new View.OnClickListener() {
  80.             @Override
  81.             public void onClick(View v) {
  82.                 if (TB2.isChecked() == false) {
  83.                     sendMessage("21");
  84.                 } else if (TB2.isChecked() == true) {
  85.                     sendMessage("20");
  86.                 }
  87.             }
  88.         });
  89.         TB3.setOnClickListener(new View.OnClickListener() {
  90.             @Override
  91.             public void onClick(View v) {
  92.                 if (TB3.isChecked() == false) {
  93.                     sendMessage("31");
  94.                 } else if (TB3.isChecked() == true) {
  95.                     sendMessage("30");
  96.                 }
  97.             }
  98.         });
  99.         TB4.setOnClickListener(new View.OnClickListener() {
  100.             @Override
  101.             public void onClick(View v) {
  102.                 if (TB4.isChecked() == false) {
  103.                     sendMessage("41");
  104.                 } else if (TB4.isChecked() == true) {
  105.                     sendMessage("40");
  106.                 }
  107.             }
  108.         });
  109.  
  110.         BtSend.setOnClickListener(new View.OnClickListener() {
  111.             @Override
  112.             public void onClick(View v) {
  113.                 String infoSend = EtSend.getText().toString();
  114.                 sendMessage(infoSend);
  115.                 setTitle("发送成功");
  116.             }
  117.         });
  118.     }
  119.  
  120.     public void sendMessage(String str) {
  121.  
  122.         try {
  123.             outputStream = MainActivity.bluetoothSocket.getOutputStream();
  124.         } catch (IOException e) {
  125.             Toast.makeText(getApplicationContext(), "输出流失败", Toast.LENGTH_SHORT);
  126.         }
  127.  
  128.         byte[] msgBuffer = null;
  129.         try {
  130.             msgBuffer = str.getBytes(encodeType);
  131.         } catch (UnsupportedEncodingException e) {
  132.             e.printStackTrace();
  133.             Log.e("decode 错误","编码异常",e);
  134.         }
  135.  
  136.         try {
  137.             outputStream.write(msgBuffer);
  138.             setTitle("成功发送命令");
  139.             Log.i("成功发送命令","  "+str);
  140.         } catch (IOException e) {
  141.             Toast.makeText(getApplicationContext(),"发送命令失败",Toast.LENGTH_SHORT);
  142.         }
  143.  
  144.     }
  145.  
  146.     /*public static void setEditTextEnable(TextView view,Boolean able){
  147.         // view.setTextColor(R.color.read_only_color);   //设置只读时的文字颜色
  148.         if (view instanceof android.widget.EditText){
  149.             view.setCursorVisible(able);      //设置输入框中的光标不可见
  150.             view.setFocusable(able);           //无焦点
  151.             view.setFocusableInTouchMode(able);     //触摸时也得不到焦点
  152.         }
  153.     }*/
  154.  
  155.     @Override
  156.     protected void onDestroy() {
  157.         try {
  158.             MainActivity.bluetoothSocket.close();
  159.         } catch (IOException e) {
  160.             e.printStackTrace();
  161.         }
  162.         super.onDestroy();
  163.     }
  164.  
  165.     private void StartThread() {
  166.         connectedThread = new ConnectedThread();
  167.         handler = new MyHandler();
  168.         connectedThread.Start();
  169.     }
  170.  
  171.     private void findViewById() {
  172.         radioGroup = (RadioGroup) findViewById(R.id.radioGroup);
  173.         radioPc = (RadioButton) findViewById(R.id.radioPC);
  174.         radioMo = (RadioButton) findViewById(R.id.radioMobile);
  175.         TB1 = (ToggleButton) findViewById(R.id.toggleButton);
  176.         TB2 = (ToggleButton) findViewById(R.id.toggleButton2);
  177.         TB3 = (ToggleButton) findViewById(R.id.toggleButton3);
  178.         TB4 = (ToggleButton) findViewById(R.id.toggleButton4);
  179.         EtReceive = (EditText)findViewById(R.id.editTextreceive);
  180.         EtSend = (EditText)findViewById(R.id.editTextsend);
  181.         BtSend = (Button)findViewById(R.id.buttonsend);
  182.         BtBack = (Button)findViewById(R.id.buttonback);
  183.         BtClose = (Button)findViewById(R.id.buttonclose);
  184.  
  185.  
  186.     }
  187.  
  188.     //单选按钮
  189.     @Override
  190.     public void onCheckedChanged(RadioGroup group, int checkedId) {
  191.  
  192.         switch (checkedId)
  193.         {
  194.             case R.id.radioPC:
  195.                 encodeType = "GBK";
  196.                 break;
  197.             case R.id.radioMobile:
  198.                 encodeType = "UTF-1";
  199.                 break;
  200.             default:
  201.                 break;
  202.         }
  203.     }
  204.  
  205.     /**
  206.      * 连接线程
  207.      */
  208.     class ConnectedThread extends  Thread
  209.     {
  210.         private InputStream inputStream = null;
  211.         private long wait;
  212.         private Thread thread;
  213.  
  214.         public ConnectedThread()
  215.         {
  216.             isRecording = false;
  217.             this.wait = 50;
  218.             thread = new Thread(new ReadRunnable());
  219.         }
  220.  
  221.         public void Stop()
  222.         {
  223.             isRecording = false;
  224.         }
  225.         public void Start()
  226.         {
  227.             isRecording = true;
  228.             State state = thread.getState();
  229.             if(state == State.NEW)
  230.             {
  231.                 thread.start();
  232.             }else thread.resume();
  233.         }
  234.  
  235.         private class ReadRunnable implements Runnable
  236.         {
  237.  
  238.             @Override
  239.             public void run() {
  240.                 while(isRecording)
  241.                 {
  242.                     try {
  243.                         inputStream = MainActivity.bluetoothSocket.getInputStream();
  244.  
  245.                     } catch (IOException e) {
  246.                         Toast.makeText(getApplicationContext(),"创建input流失败",Toast.LENGTH_SHORT).show();
  247.                     }
  248.                     int length =20;
  249.                     byte[] temp = new byte[length];//创建一个byte数组进行获取
  250.                     if(inputStream != null)
  251.                     {
  252.                         try {
  253.                             int len = inputStream.read(temp,0,length-1);
  254.                             if(len > 0)
  255.                             {
  256.                                 byte[] bluetoothbuff = new byte[len];
  257.                                 System.arraycopy(temp,0,bluetoothbuff,0,bluetoothbuff.length);
  258.  
  259.                                 String readStr = new String(bluetoothbuff,encodeType);
  260.                                 handler.obtainMessage(01,len,-1,readStr).sendToTarget();
  261.                             }
  262.                             Thread.sleep(wait);
  263.                         } catch (IOException e) {
  264.                             e.printStackTrace();
  265.                         } catch (InterruptedException e) {
  266.                             handler.sendEmptyMessage(00);
  267.                         }
  268.                     }
  269.                 }
  270.             }
  271.         }
  272.  
  273.     }
  274.     private class MyHandler extends android.os.Handler
  275.     {
  276.         @Override
  277.         public void dispatchMessage(Message msg) {
  278.             switch (msg.what)
  279.             {
  280.                 case 00:
  281.                     isRecording = false;
  282.                     EtReceive.setText("");
  283.                     EtSend.setHint("soclet连接已关闭");
  284.                     break;
  285.                 case 01:
  286.                     String info = (String)msg.obj;
  287.                     EtReceive.append(info);
  288.                     break;
  289.                 default:
  290.                     break;
  291.             }
  292.         }
  293.     }
  294. }</span>

效果：




可以通过串口助手进行查看信息。

源代码：http://download.csdn.net/detail/csdnhejingzhou/9413145



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