android 蓝牙模块的串口通信

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

<?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:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.example.hejingzhou.newbuledemo.MainActivity"
    android:background="@drawable/bac">

    <Switch
        android:layout_width="50dp"
        android:layout_height="wrap_content"
        android:id="@+id/switchOpenAndClose"
        android:textOff="关闭"
        android:textOn="打开"
        android:checked="false"
        android:layout_alignParentTop="true"
        android:layout_toRightOf="@+id/textView"
        android:layout_toEndOf="@+id/textView"/>

    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="允许本设备对外可见"
        android:id="@+id/buttonVisible"
        android:layout_below="@+id/switchOpenAndClose"
        android:layout_centerHorizontal="true"/>

    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="搜索其他的设备"
        android:id="@+id/buttonSeraveDevice"
        android:layout_below="@+id/buttonVisible"
        android:layout_centerHorizontal="true"/>

    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="退出程序"
        android:id="@+id/buttonExit"

        android:layout_alignParentBottom="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"/>

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:text="蓝牙开关"
        android:textColor="#FFFFFF"
        android:id="@+id/textView"
        android:layout_alignParentTop="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"/>

    <ListView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/listViewShow"
        android:layout_centerHorizontal="true"
        android:layout_below="@+id/buttonSeraveDevice"
        android:layout_above="@+id/buttonExit"/>


</RelativeLayout>

二、MainActivity.java

<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;

</strong></span></span></span><span style="font-size:18px;">import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothServerSocket;
import android.bluetooth.BluetoothSocket;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.*;
import android.os.Process;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.CompoundButton;
import android.widget.ListView;
import android.widget.Switch;
import android.widget.Toast;

import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.List;
import java.util.UUID;

public class MainActivity extends AppCompatActivity {
    private Switch aSwitch;
    private Button buttonVisible,buttonSearch,buttonExit;
    private ListView listView;

    private Handler handler;

    private BluetoothAdapter bluetoothAdapter;

    static final String SPP_UUID = "00001101-0000-1000-8000-00805F9B34FB";
    private UUID uuid;

    private List<String> listDevice = new ArrayList<>();
    private ArrayAdapter<String> adapterDevice;

    private static BluetoothSocket socket;
    public static BluetoothSocket bluetoothSocket;

    private static AcceptThread acceptThread;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        findViewById();
        OnClick();
        bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
        uuid = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB");
        InitBlueTooth();
    }
    /************************************************************************************************************/
    private void OnClick() {
        //Switch开关
        aSwitch.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                if (isChecked == true) {
                    if (bluetoothAdapter.getState() == BluetoothAdapter.STATE_ON) {
                        return;
                    } else if (bluetoothAdapter.getState() == BluetoothAdapter.STATE_OFF) {
                        bluetoothAdapter.enable();
                        try {
                            Thread.sleep(3000);
                        } catch (InterruptedException e) {
                            e.printStackTrace();
                        }
                        if (bluetoothAdapter.getState() == BluetoothAdapter.STATE_ON) {
                            Toast.makeText(MainActivity.this, "蓝牙已打开", Toast.LENGTH_SHORT).show();
                        }
                        /***********修改修改**********/
                        try {
                            acceptThread = new AcceptThread();
                            handler = new Handler() {
                                public void handle(Message message) {
                                    switch (message.what) {
                                        case 0:
                                            acceptThread.start();
                                    }

                                }

                            };
                        } catch (Exception e) {
                            Toast.makeText(MainActivity.this, "服务监听出错", Toast.LENGTH_SHORT).show();
                        }

                    }
                } else if (isChecked = false) {
                    bluetoothAdapter.disable();
                    if (bluetoothAdapter.getState() == BluetoothAdapter.STATE_OFF)
                        Toast.makeText(MainActivity.this, "蓝牙已关闭", Toast.LENGTH_SHORT).show();
                }
            }
        });
        //可见性Button
        buttonVisible.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent discoverableIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE);
                discoverableIntent.putExtra(BluetoothAdapter.EXTRA_DISCOVERABLE_DURATION, 300);
                startActivity(discoverableIntent);
            }
        });
        //搜索设备
        buttonSearch.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                setTitle("本机蓝牙地址" + bluetoothAdapter.getAddress());
                listDevice.clear();
                bluetoothAdapter.startDiscovery();//启动搜索其他蓝牙设备
            }
        });
        //退出Button
        buttonExit.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if(bluetoothSocket != null)
                {
                    try {
                        bluetoothSocket.close();
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                    MainActivity.this.finish();
                }
            }
        });
    }

    /************************************************************************************************************/
    private void InitBlueTooth() {
        Toast.makeText(MainActivity.this,"正在初始化软件，请稍等...",Toast.LENGTH_SHORT).show();
        
        /*if(bluetoothAdapter == null)
        {
            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();
            return;
        }
        else
        {*/
            if(bluetoothAdapter.getState() == BluetoothAdapter.STATE_OFF)
            {
                aSwitch.setChecked(false);
                bluetoothAdapter.enable();
                if(bluetoothAdapter.getState() == BluetoothAdapter.STATE_ON)
                {
                    Toast.makeText(MainActivity.this,"成功帮您打开蓝牙",Toast.LENGTH_LONG).show();
                }else
                {
                    Toast.makeText(MainActivity.this,"打开蓝牙失败，请手动打开您的蓝牙",Toast.LENGTH_LONG).show();
                }


            }else if(bluetoothAdapter.getState() == bluetoothAdapter.STATE_ON)
            {
                acceptThread = new AcceptThread();

                handler = new Handler()
                {
                  public void handleMessage(Message msg)
                  {
                      switch (msg.what)
                      {
                          case 0:
                              acceptThread.start();
                              break;
                      }

                  }

                };

            }
            //注册Receiver蓝牙设备的相关结果
            //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。
            IntentFilter intentFilter = new IntentFilter();
            intentFilter.addAction(BluetoothDevice.ACTION_FOUND);
            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
            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。
            intentFilter.addAction(BluetoothAdapter.ACTION_STATE_CHANGED);//广播操作：当地蓝牙适配器的状态已更改。
            registerReceiver(serachDevices,intentFilter);
       // }
    }

    /**************************************************************************************************************/
    private void findViewById() {
        aSwitch = (Switch)findViewById(R.id.switchOpenAndClose);
        buttonVisible = (Button)findViewById(R.id.buttonVisible);
        buttonSearch = (Button)findViewById(R.id.buttonSeraveDevice);
        buttonExit = (Button)findViewById(R.id.buttonExit);
        listView = (ListView)findViewById(R.id.listViewShow);
        adapterDevice = new ArrayAdapter<String>(MainActivity.this,android.R.layout.simple_list_item_1,listDevice);
        listView.setAdapter(adapterDevice);
        listView.setOnItemClickListener(new ItemClickEvent());//设置ListView 的单击监听
    }

    /*************************************************************************************************************/
    class AcceptThread extends Thread
    {
        private final BluetoothServerSocket serverSocket;//蓝牙服务套接口
        public AcceptThread()
        {
            BluetoothServerSocket BTServerSocket = null;
            try {
                Method listenMethod = bluetoothAdapter.getClass().getMethod("listenUsingRfcommOn",new  Class[]{int.class});
                BTServerSocket = (BluetoothServerSocket)listenMethod.invoke(bluetoothAdapter,Integer.valueOf(1));
            } catch (NoSuchMethodException e) {
                e.printStackTrace();
            } catch (InvocationTargetException e) {
                e.printStackTrace();
            } catch (IllegalAccessException e) {
                e.printStackTrace();
            }
            serverSocket = BTServerSocket;
        }
        public void run()
        {
            while (true)
            {
                try {
                    socket = serverSocket.accept();
                    Log.e("MainActivity","socket = serverSocket.accept();错误");
                } catch (IOException e) {
                   break;
                }
                if(socket != null)
                {
                    manageConnectedSocket();
                    try {
                        serverSocket.close();
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                    break;
                }
            }
            Message message = new Message();
            message.what = 0;
            handler.sendMessage(message);

        }

        public void cancel()
        {
            try {
                serverSocket.close();
            } catch (IOException e) {
                Log.e("MainActivity","注销错误");
            }
        }
    }

    /*************************************************************************************************************/
    class ItemClickEvent implements AdapterView.OnItemClickListener {

        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
            String str = listDevice.get(position);
            String[] values = str.split("\\|");
            String address = values[1];
            Log.i("address",values[1]);
            uuid = UUID.fromString(SPP_UUID);
            Log.i("uuid",uuid.toString());

            BluetoothDevice BtDev = bluetoothAdapter.getRemoteDevice(address);//getRemoteDevice获取BluetoothDevice对象从给定的蓝牙硬件地址
            Log.i("获取的蓝牙硬件对象","   "+BtDev);
            Method method;
            try {
                method = BtDev.getClass().getMethod("createRfcommSocket",new Class[]{int.class});
                bluetoothSocket = (BluetoothSocket) method.invoke(BtDev,Integer.valueOf(1));
            } catch (NoSuchMethodException e) {
                e.printStackTrace();
            } catch (InvocationTargetException e) {
                e.printStackTrace();
            } catch (IllegalAccessException e) {
                e.printStackTrace();
            }

            bluetoothAdapter.cancelDiscovery();//对蓝牙进行信号注销
            try {
                bluetoothSocket.connect();//蓝牙配对
                Toast.makeText(MainActivity.this,"连接成功进入控制界面",Toast.LENGTH_SHORT).show();

                Intent intent = new Intent();
                intent.setClass(MainActivity.this, SendMessageActivity.class);
                startActivity(intent);
            } catch (IOException e) {
                e.printStackTrace();
                Toast.makeText(MainActivity.this,"连接失败",Toast.LENGTH_SHORT).show();
            }

        }
    }
    /*************************************************************************************************************/
    /**
     * 基类代码,将收到发送的意图sendBroadcast()。
     */
    private BroadcastReceiver serachDevices = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            String action = intent.getAction();
            Bundle bundle = intent.getExtras();
            Object[] listName = bundle.keySet().toArray();

            //显示收到的消息及细节
            for(int i = 0;i < listName.length;i++)
            {
                String keyName = listName[i].toString();
                Log.i(keyName,String.valueOf(bundle.get(keyName)));
            }
            if(BluetoothDevice.ACTION_FOUND.equals(action))
            {
                BluetoothDevice BTDevice = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
                String str = BTDevice.getName()+"|"+BTDevice.getAddress();
                if(listDevice.indexOf(str) == -1)//indexOf检索字符串，如果为null返回-1
                {
                    listDevice.add(str);
                }
                adapterDevice.notifyDataSetChanged();//每次改变刷新一下自己
            }

        }
    };
    /*************************************************************************************************************/
    @Override
    protected void onDestroy() {
        this.unregisterReceiver(serachDevices);
        super.onDestroy();
        android.os.Process.killProcess(Process.myPid());//杀死Pid
        acceptThread.cancel();
        acceptThread.destroy();
    }

    /*************************************************************************************************************/
    private void manageConnectedSocket()
    {
        bluetoothSocket = socket;
        Intent newActivity = new Intent();
        newActivity.setClass(MainActivity.this,SendMessageActivity.class);
        startActivity(newActivity);
    }

}</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>
</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

package com.example.hejingzhou.newbuledemo;
<span style="font-size:18px;">
import android.os.Message;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.CompoundButton;
import android.widget.EditText;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.ToggleButton;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;
import java.util.logging.Handler;

public class SendMessageActivity extends AppCompatActivity  implements RadioGroup.OnCheckedChangeListener {

    private RadioGroup radioGroup;
    private RadioButton radioPc, radioMo;
    private ToggleButton TB1, TB2, TB3, TB4;
    private EditText EtReceive, EtSend;
    private Button BtSend, BtBack, BtClose;

    private android.os.Handler handler;

    private String encodeType = "GBK";
    private boolean isRecording = false;

    private OutputStream outputStream = null;
    private ConnectedThread connectedThread;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_send_message);
        findViewById();
        StartThread();
        onClickListener();
    }

    private void onClickListener() {
        BtClose.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                try {
                    MainActivity.bluetoothSocket.close();//关闭蓝牙接口
                    connectedThread.Stop();
                    setTitle("蓝牙连接断开");
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        });

        BtBack.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                SendMessageActivity.this.finish();
            }
        });

        TB1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (TB1.isChecked() == false) {
                    sendMessage("11");
                } else if (TB1.isChecked() == true) {
                    sendMessage("10");
                }
            }
        });
        TB2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (TB2.isChecked() == false) {
                    sendMessage("21");
                } else if (TB2.isChecked() == true) {
                    sendMessage("20");
                }
            }
        });
        TB3.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (TB3.isChecked() == false) {
                    sendMessage("31");
                } else if (TB3.isChecked() == true) {
                    sendMessage("30");
                }
            }
        });
        TB4.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (TB4.isChecked() == false) {
                    sendMessage("41");
                } else if (TB4.isChecked() == true) {
                    sendMessage("40");
                }
            }
        });

        BtSend.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String infoSend = EtSend.getText().toString();
                sendMessage(infoSend);
                setTitle("发送成功");
            }
        });
    }

    public void sendMessage(String str) {

        try {
            outputStream = MainActivity.bluetoothSocket.getOutputStream();
        } catch (IOException e) {
            Toast.makeText(getApplicationContext(), "输出流失败", Toast.LENGTH_SHORT);
        }

        byte[] msgBuffer = null;
        try {
            msgBuffer = str.getBytes(encodeType);
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
            Log.e("decode 错误","编码异常",e);
        }

        try {
            outputStream.write(msgBuffer);
            setTitle("成功发送命令");
            Log.i("成功发送命令","  "+str);
        } catch (IOException e) {
            Toast.makeText(getApplicationContext(),"发送命令失败",Toast.LENGTH_SHORT);
        }

    }

    /*public static void setEditTextEnable(TextView view,Boolean able){
        // view.setTextColor(R.color.read_only_color);   //设置只读时的文字颜色
        if (view instanceof android.widget.EditText){
            view.setCursorVisible(able);      //设置输入框中的光标不可见
            view.setFocusable(able);           //无焦点
            view.setFocusableInTouchMode(able);     //触摸时也得不到焦点
        }
    }*/

    @Override
    protected void onDestroy() {
        try {
            MainActivity.bluetoothSocket.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
        super.onDestroy();
    }

    private void StartThread() {
        connectedThread = new ConnectedThread();
        handler = new MyHandler();
        connectedThread.Start();
    }

    private void findViewById() {
        radioGroup = (RadioGroup) findViewById(R.id.radioGroup);
        radioPc = (RadioButton) findViewById(R.id.radioPC);
        radioMo = (RadioButton) findViewById(R.id.radioMobile);
        TB1 = (ToggleButton) findViewById(R.id.toggleButton);
        TB2 = (ToggleButton) findViewById(R.id.toggleButton2);
        TB3 = (ToggleButton) findViewById(R.id.toggleButton3);
        TB4 = (ToggleButton) findViewById(R.id.toggleButton4);
        EtReceive = (EditText)findViewById(R.id.editTextreceive);
        EtSend = (EditText)findViewById(R.id.editTextsend);
        BtSend = (Button)findViewById(R.id.buttonsend);
        BtBack = (Button)findViewById(R.id.buttonback);
        BtClose = (Button)findViewById(R.id.buttonclose);


    }

    //单选按钮
    @Override
    public void onCheckedChanged(RadioGroup group, int checkedId) {

        switch (checkedId)
        {
            case R.id.radioPC:
                encodeType = "GBK";
                break;
            case R.id.radioMobile:
                encodeType = "UTF-1";
                break;
            default:
                break;
        }
    }

    /**
     * 连接线程
     */
    class ConnectedThread extends  Thread
    {
        private InputStream inputStream = null;
        private long wait;
        private Thread thread;

        public ConnectedThread()
        {
            isRecording = false;
            this.wait = 50;
            thread = new Thread(new ReadRunnable());
        }

        public void Stop()
        {
            isRecording = false;
        }
        public void Start()
        {
            isRecording = true;
            State state = thread.getState();
            if(state == State.NEW)
            {
                thread.start();
            }else thread.resume();
        }

        private class ReadRunnable implements Runnable
        {

            @Override
            public void run() {
                while(isRecording)
                {
                    try {
                        inputStream = MainActivity.bluetoothSocket.getInputStream();

                    } catch (IOException e) {
                        Toast.makeText(getApplicationContext(),"创建input流失败",Toast.LENGTH_SHORT).show();
                    }
                    int length =20;
                    byte[] temp = new byte[length];//创建一个byte数组进行获取
                    if(inputStream != null)
                    {
                        try {
                            int len = inputStream.read(temp,0,length-1);
                            if(len > 0)
                            {
                                byte[] bluetoothbuff = new byte[len];
                                System.arraycopy(temp,0,bluetoothbuff,0,bluetoothbuff.length);

                                String readStr = new String(bluetoothbuff,encodeType);
                                handler.obtainMessage(01,len,-1,readStr).sendToTarget();
                            }
                            Thread.sleep(wait);
                        } catch (IOException e) {
                            e.printStackTrace();
                        } catch (InterruptedException e) {
                            handler.sendEmptyMessage(00);
                        }
                    }
                }
            }
        }

    }
    private class MyHandler extends android.os.Handler
    {
        @Override
        public void dispatchMessage(Message msg) {
            switch (msg.what)
            {
                case 00:
                    isRecording = false;
                    EtReceive.setText("");
                    EtSend.setHint("soclet连接已关闭");
                    break;
                case 01:
                    String info = (String)msg.obj;
                    EtReceive.append(info);
                    break;
                default:
                    break;
            }
        }
    }
}</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