1.加入权限

  1. <uses-feature
  2.         android:name="android.hardware.bluetooth_le"
  3.         android:required="true" />
  4.  
  5.     <uses-permission android:name="android.permission.BLUETOOTH" />
  6.     <uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />

2.代码：

  1. package myapplication.com.myapplicationble;
  2.  
  3. import android.app.Service;
  4. import android.bluetooth.BluetoothAdapter;
  5. import android.bluetooth.BluetoothDevice;
  6. import android.bluetooth.BluetoothServerSocket;
  7. import android.bluetooth.BluetoothSocket;
  8. import android.content.Context;
  9. import android.content.Intent;
  10. import android.os.AsyncTask;
  11. import android.os.Handler;
  12. import android.os.IBinder;
  13. import android.os.Message;
  14. import android.support.v7.app.AppCompatActivity;
  15. import android.os.Bundle;
  16. import android.util.Log;
  17. import android.view.View;
  18. import android.widget.Button;
  19. import android.widget.EditText;
  20. import android.widget.PopupMenu;
  21. import android.widget.PopupWindow;
  22. import android.widget.TextView;
  23. import android.widget.Toast;
  24.  
  25. import java.io.ByteArrayOutputStream;
  26. import java.io.IOException;
  27. import java.io.InputStream;
  28. import java.io.OutputStream;
  29. import java.net.Socket;
  30. import java.util.UUID;
  31. public class MainActivity extends AppCompatActivity {
  32.  
  33.     private BluetoothAdapter BA;
  34.     BluetoothServerSocket mmServerSocket;
  35.  
  36.     private static String address = "20:16:09:26:81:80"; // <==应填写蓝牙串口模块的蓝牙地址。
  37.     private BluetoothSocket btSocket = null;
  38.     private OutputStream outStream = null;
  39.     public InputStream inStream = null;
  40.     EditText editText;
  41.     TextView textView;
  42.     Button button, button1;
  43.     private static final UUID MY_UUID = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB");
  44.  
  45.     @Override
  46.     protected void onCreate(Bundle savedInstanceState) {
  47.         super.onCreate(savedInstanceState);
  48.         setContentView(R.layout.activity_main);
  49.  
  50.         initView();
  51.  
  52.     }
  53.     /**
  54.      * 连接蓝牙
  55.      * **/
  56.     public void connect() {
  57.         BA = BluetoothAdapter.getDefaultAdapter();
  58.         BluetoothDevice device = BA.getRemoteDevice(address);
  59.  
  60. //          pairedDevices = BA.getBondedDevices();
  61.         try {
  62.             btSocket = device.createRfcommSocketToServiceRecord(MY_UUID);
  63.            // new  ReceiveDatas(btSocket).start();
  64.         } catch (IOException e) {
  65.         }
  66.         BA.cancelDiscovery();
  67.         try {
  68.             btSocket.connect();
  69.          //   String s="sm";
  70.             outStream = btSocket.getOutputStream();
  71.           //  outStream.write(s.getBytes());
  72.             //outStream.write(0x41);
  73.  
  74.             inStream = btSocket.getInputStream();
  75.             while (true){
  76.                 byte[] buffer = new byte[100];
  77.                 int count = inStream.read(buffer);
  78.                int a= inStream.available();
  79.                 String ss= new String(buffer, 0, count, "utf-8");
  80.                 System.out.println("***A"+ss);
    　　　　　　// 输出信息缺少……不全，占时不会
  81.             }
  82.  
  83.         } catch (IOException e) {
  84.         }
  85.         try {
  86.           //  btSocket.close();
  87.         } catch (Exception e2) {
  88.  
  89.             // Log .e(TAG,"ON RESUME: Unable to close socket during connection failure", e2);
  90.         }
  91.     }
  92.  
  93.     public void initView() {
  94.  
  95.         editText = (EditText) findViewById(R.id.edit);
  96.         textView = (TextView) findViewById(R.id.textView);
  97.         button = (Button) findViewById(R.id.button);
  98.         button1 = (Button) findViewById(R.id.button1);
  99.         BA = BluetoothAdapter.getDefaultAdapter();
  100.        /**
  101.         * 连接蓝牙
  102.         * */
  103.         button1.setOnClickListener(new View.OnClickListener() {
  104.             @Override
  105.             public void onClick(View v) {
  106.                 System.out.println("***11");
  107.                 as();
  108.             }
  109.         });
  110.         /**
  111.          * 发送信息
  112.          * **/
  113.         button.setOnClickListener(new View.OnClickListener() {
  114.             @Override
  115.             public void onClick(View v) {
  116.                 String s = editText.getText().toString();
  117.                 try {
  118.  
  119. 　　　　　　　　　　//   outStream.write(s.getBytes()); 发送数据
  120.  
  121.                     outStream = btSocket.getOutputStream();
  122.                     inStream=btSocket.getInputStream();
  123.                     outStream.write("sm".getBytes());
  124.                     outStream.write("\r\n".getBytes());
  125.  
  126.                 } catch (IOException e) {
  127.                     e.printStackTrace();
  128.                 }
  129.             }
  130.         });
  131.  
  132.     }
  133.  
  134. /**
  135.  *
  136.  *   连接蓝牙
  137.  * **/
  138.     public void as() {
  139.         new AsyncTask() {
  140.  
  141.             @Override
  142.             protected String doInBackground(Object[] params) {
  143.  
  144.                 connect();
  145.                 return null;
  146.             }
  147.  
  148.             @Override
  149.             protected void onPreExecute() {
  150.                 super.onPreExecute();
  151.             }
  152.  
  153.             @Override
  154.             protected void onPostExecute(Object o) {
  155.                 super.onPostExecute(o);
  156.                 Toast.makeText(getApplicationContext(), "2", Toast.LENGTH_SHORT).show();
  157.             }
  158.         }.execute();
  159.     }
  160.  
  161. }

3.操作图

<1>连接后发送数据oooo到蓝牙，接收端显示oooo

<2> 终端发送数据，手机端打印出数据ooooui  [oooo]是打印的字符串，ui为接收的数据

修改——-->：

接受数据：

  1. private class ConnectedThread extends Thread {
  2.        private final BluetoothSocket socket;
  3.        private final InputStream inputStream;
  4.        private final OutputStream outputStream;
  5.        public ConnectedThread(BluetoothSocket socket) {
  6.            this.socket = socket;
  7.            InputStream input = null;
  8.            OutputStream output = null;
  9.            try {
  10.                input = socket.getInputStream();
  11.                output = socket.getOutputStream();
  12.            } catch (IOException e) {
  13.                e.printStackTrace();
  14.            }
  15.            this.inputStream = input;
  16.            this.outputStream = output;
  17.        }
  18.        public void run() {
  19.            byte[] buff = new byte[1024];
  20.            int bytes;
  21.            while (true) {
  22.                try {
  23.                    bytes = inputStream.read(buff);
  24.                    String str = new String(buff, "ISO-8859-1");
  25.                    str = str.substring(0, bytes);
  26.                    Log.e("recv", str);
  27.  
  28.                    Message message=handler.obtainMessage();
  29.                    message.obj=str;
  30.                    handler.sendMessage(message);
  31.                } catch (IOException e) {
  32.                    e.printStackTrace();
  33.                    break;
  34.                }
  35.            }
  36.        }
  37.        public void write(byte[] bytes) {
  38.            try {
  39.                outputStream.write(bytes);
  40.            } catch (IOException e) {
  41.                e.printStackTrace();
  42.            }
  43.        }
  44.        public void cancel() {
  45.            try {
  46.                socket.close();
  47.            } catch (IOException e) {
  48.                e.printStackTrace();
  49.            }
  50.        }
  51.    }

---------------------------------------------------------------------------------------------------------------------------------------------------------

完成后代码：

1.权限：

  1.     <uses-feature
  2.         android:name="android.hardware.bluetooth_le"
  3.         android:required="true" />
  4.  
  5.     <uses-permission android:name="android.permission.BLUETOOTH" />
  6.     <uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />

2.Activity：

  1. package myapplication.com.myapplicationble;
  2.  
  3. import android.app.Service;
  4. import android.bluetooth.BluetoothAdapter;
  5. import android.bluetooth.BluetoothDevice;
  6. import android.bluetooth.BluetoothServerSocket;
  7. import android.bluetooth.BluetoothSocket;
  8. import android.content.Context;
  9. import android.content.Intent;
  10. import android.os.AsyncTask;
  11. import android.os.Handler;
  12. import android.os.IBinder;
  13. import android.os.Message;
  14. import android.support.v7.app.AppCompatActivity;
  15. import android.os.Bundle;
  16. import android.util.Log;
  17. import android.view.View;
  18. import android.widget.Button;
  19. import android.widget.EditText;
  20. import android.widget.PopupMenu;
  21. import android.widget.PopupWindow;
  22. import android.widget.TextView;
  23. import android.widget.Toast;
  24.  
  25. import java.io.BufferedReader;
  26. import java.io.ByteArrayOutputStream;
  27. import java.io.IOException;
  28. import java.io.InputStream;
  29. import java.io.InputStreamReader;
  30. import java.io.OutputStream;
  31. import java.net.Socket;
  32. import java.util.ArrayList;
  33. import java.util.UUID;
  34. public class MainActivity extends AppCompatActivity {
  35.  
  36.     private BluetoothAdapter BA;
  37.     BluetoothServerSocket mmServerSocket;
  38.     String message="";
  39.     private static String address = "20:16:09:26:81:80"; // <==应填写蓝牙串口模块的蓝牙地址。
  40.     private BluetoothSocket btSocket = null;
  41.     private OutputStream outStream = null;
  42.     public InputStream inStream = null;
  43.     EditText editText;
  44.     TextView textView;
  45.     Button button, button1;
  46.     boolean BluetoothFlag;
  47.     private static final UUID MY_UUID = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB");
  48.  
  49.     @Override
  50.     protected void onCreate(Bundle savedInstanceState) {
  51.         super.onCreate(savedInstanceState);
  52.         setContentView(R.layout.activity_main);
  53.  
  54.         initView();
  55.  
  56.     }
  57.  
  58.     /**
  59.      * 连接蓝牙
  60.      **/
  61.     public void connect() {
  62.         BA = BluetoothAdapter.getDefaultAdapter();
  63.         BluetoothDevice device = BA.getRemoteDevice(address);
  64.  
  65. //          pairedDevices = BA.getBondedDevices();
  66.         try {
  67.             btSocket = device.createRfcommSocketToServiceRecord(MY_UUID);
  68.         } catch (IOException e) {
  69.         }
  70.         BA.cancelDiscovery();
  71.         try {
  72.             btSocket.connect();
  73.            // String s="sm";
  74.             outStream = btSocket.getOutputStream();
  75.             //outStream.write(s.getBytes());
  76.             //outStream.write(0x41);
  77.             inStream = btSocket.getInputStream();
  78. //            while (true){
  79. //                byte[] buffer = new byte[1];
  80. //                int length = 0;
  81. //                byte bb = 0;
  82. //                String line = null;
  83. //                ArrayList<Byte> list = new ArrayList<Byte>();
  84. //                while (inStream.read(buffer) == -1) {
  85. //                    try {
  86. //                        Thread.sleep(100);
  87. //                    } catch (InterruptedException e) {
  88. //                        e.printStackTrace();
  89. //                    }
  90. //                    System.out.print("-->"   +inStream.read(buffer));
  91. //                }
  92. //            }
  93.  
  94.             /***
  95.              * 1
  96.              * **/
  97. //            while (true) {
  98. //
  99. //                if(inStream.available()>=0){
  100. //                    byte[] buffer = new byte[1024];
  101. //                    int count = inStream.read(buffer);
  102. //                    // System.out.println("***MAX:" + a);
  103. //                    String ss = new String(buffer, 0, count, "utf-8");
  104. //                    System.out.println("*--" + ss);
  105. //                }
  106. //
  107. //            }
  108.  
  109.             /****
  110.              *  2
  111.              * */
  112.  
  113. //            BluetoothFlag = true;
  114. //            MyThread bluetoothThread = new MyThread();
  115. //            bluetoothThread.start();
  116.  
  117.             /***
  118.              *
  119.              *  3
  120.              *  */
  121.  
  122.             ConnectedThread connectedThread = new ConnectedThread(btSocket);
  123.             connectedThread.start();
  124.  
  125.         } catch (IOException e) {
  126.         }
  127.         try {
  128.             //  btSocket.close();
  129.         } catch (Exception e2) {
  130.  
  131.             // Log .e(TAG,"ON RESUME: Unable to close socket during connection failure", e2);
  132.         }
  133.     }
  134.  
  135.     public void initView() {
  136.  
  137.         editText = (EditText) findViewById(R.id.edit);
  138.         textView = (TextView) findViewById(R.id.textView);
  139.         button = (Button) findViewById(R.id.button);
  140.         button1 = (Button) findViewById(R.id.button1);
  141.         BA = BluetoothAdapter.getDefaultAdapter();
  142.         /**
  143.          * 连接蓝牙
  144.          * */
  145.         button1.setOnClickListener(new View.OnClickListener() {
  146.             @Override
  147.             public void onClick(View v) {
  148.                 System.out.println("***11");
  149.                 as();
  150.             }
  151.         });
  152.         /**
  153.          * 发送信息
  154.          * **/
  155.         button.setOnClickListener(new View.OnClickListener() {
  156.             @Override
  157.             public void onClick(View v) {
  158.                 String s = editText.getText().toString();
  159.                 try {
  160.  
  161.                     outStream = btSocket.getOutputStream();
  162.                     inStream = btSocket.getInputStream();
  163.                    // outStream.write("\r\n".getBytes());
  164.                    outStream.write("sm".getBytes());
  165.                   outStream.write("\r\n".getBytes());
  166.  
  167.                 } catch (IOException e) {
  168.                     e.printStackTrace();
  169.                 }
  170.             }
  171.         });
  172.  
  173.     }
  174.  
  175.     /**
  176.      * 连接蓝牙
  177.      **/
  178.     public void as() {
  179.         new AsyncTask() {
  180.  
  181.             @Override
  182.             protected String doInBackground(Object[] params) {
  183.  
  184.                 connect();
  185.                 return null;
  186.             }
  187.  
  188.             @Override
  189.             protected void onPreExecute() {
  190.                 super.onPreExecute();
  191.             }
  192.  
  193.             @Override
  194.             protected void onPostExecute(Object o) {
  195.                 super.onPostExecute(o);
  196.                 Toast.makeText(getApplicationContext(), "2", Toast.LENGTH_SHORT).show();
  197.             }
  198.         }.execute();
  199.     }
  200.  
  201.    /**
  202.     * 在接受不到数据
  203.     * **/
  204.  
  205.    private class ConnectedThread extends Thread {
  206.        private final BluetoothSocket socket;
  207.        private final InputStream inputStream;
  208.        private final OutputStream outputStream;
  209.        public ConnectedThread(BluetoothSocket socket) {
  210.            this.socket = socket;
  211.            InputStream input = null;
  212.            OutputStream output = null;
  213.            try {
  214.                input = socket.getInputStream();
  215.                output = socket.getOutputStream();
  216.            } catch (IOException e) {
  217.                e.printStackTrace();
  218.            }
  219.            this.inputStream = input;
  220.            this.outputStream = output;
  221.        }
  222.        public void run() {
  223.            byte[] buff = new byte[1024];
  224.            int bytes;
  225.            while (true) {
  226.                try {
  227.                    bytes = inputStream.read(buff);
  228.                    String str = new String(buff, "ISO-8859-1");
  229.                    str = str.substring(0, bytes);
  230.                    Log.e("recv", str);
  231.  
  232.                    Message message=handler.obtainMessage();
  233.                    message.obj=str;
  234.                    handler.sendMessage(message);
  235.                } catch (IOException e) {
  236.                    e.printStackTrace();
  237.                    break;
  238.                }
  239.            }
  240.        }
  241.        public void write(byte[] bytes) {
  242.            try {
  243.                outputStream.write(bytes);
  244.            } catch (IOException e) {
  245.                e.printStackTrace();
  246.            }
  247.        }
  248.        public void cancel() {
  249.            try {
  250.                socket.close();
  251.            } catch (IOException e) {
  252.                e.printStackTrace();
  253.            }
  254.        }
  255.    }
  256.     Handler  handler=new Handler(){
  257.         @Override
  258.         public void handleMessage(Message msg) {
  259.  
  260.             String s= (String) msg.obj;
  261.             message=message+s;
  262.             if(message.contains("RTS_Mon->")){
  263.                 textView.setText(message);
  264.  
  265.             }
  266.         }
  267.     };
  268.  
  269. }

3.xml

  1. <?xml version="1.0" encoding="utf-8"?>
  2. <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
  3.     xmlns:tools="http://schemas.android.com/tools"
  4.     android:layout_width="match_parent"
  5.     android:layout_height="match_parent"
  6.     android:paddingBottom="@dimen/activity_vertical_margin"
  7.     android:paddingLeft="@dimen/activity_horizontal_margin"
  8.     android:paddingRight="@dimen/activity_horizontal_margin"
  9.     android:paddingTop="@dimen/activity_vertical_margin"
  10.     tools:context="myapplication.com.myapplicationble.MainActivity">
  11.  
  12.     <TextView
  13.         android:id="@+id/textView"
  14.         android:layout_width="wrap_content"
  15.         android:layout_height="wrap_content"
  16.         android:text="Hello World!" />
  17.     <EditText
  18.         android:layout_below="@+id/textView"
  19.         android:id="@+id/edit"
  20.         android:layout_width="match_parent"
  21.         android:textColor="@color/hei"
  22.         android:layout_height="wrap_content"/>
  23.     <Button
  24.         android:layout_height="wrap_content"
  25.         android:layout_width="match_parent"
  26.         android:id="@+id/button"
  27.         android:layout_below="@+id/edit"
  28.         android:text="send"
  29.         />
  30.     <Button
  31.  
  32.         android:layout_height="wrap_content"
  33.         android:layout_width="match_parent"
  34.         android:id="@+id/button1"
  35.         android:layout_below="@+id/button"
  36.         android:text="lianjie"
  37.         />
  38.  
  39. </RelativeLayout>

code:链接：http://pan.baidu.com/s/1jHAL0WI 密码：xvss

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