服务端：

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.Bundle;import android.os.Handler;import android.os.Message;import android.support.v7.app.AppCompatActivity;import android.util.Log;import android.view.View;import android.widget.Button;import android.widget.TextView;import android.widget.Toast;import java.io.IOException;import java.io.InputStream;import java.io.OutputStream;import java.util.HashMap;import java.util.Map;import java.util.UUID;public class MainActivity extends AppCompatActivity implements View.OnClickListener {    private BluetoothAdapter btAdapter;    private String btAdress;    private InputStream input;    private OutputStream output;    private Handler handler;    final String uuid = "af3ad9b2-0ea6-4a90-be06-a1c86bc7e28b";    private TextView getInformationText;    private Button one;    private Button two;    private Button three;    private Button four;    private Button five;    private Button six;    private int position;    private Map
    
      map;    public static boolean isRunning = true;    private BroadcastReceiver receiver;    private IntentFilter filter;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        position = 1;        //初始化        one = (Button) findViewById(R.id.one);        two = (Button) findViewById(R.id.two);        three = (Button) findViewById(R.id.three);        four = (Button) findViewById(R.id.four);        five = (Button) findViewById(R.id.five);        six = (Button) findViewById(R.id.six);        two.setEnabled(false);        three.setEnabled(false);        four.setEnabled(false);        five.setEnabled(false);        six.setEnabled(false);        one.setOnClickListener(this);        two.setOnClickListener(this);        three.setOnClickListener(this);        four.setOnClickListener(this);        five.setOnClickListener(this);        six.setOnClickListener(this);        //初始化标识        map = new HashMap<>();        map.put(1, one);        map.put(2, two);        map.put(3, three);        map.put(4, four);        map.put(5, five);        map.put(6, six);        //注册广播        receiver = new BroadcastReceiver() {            @Override            public void onReceive(Context context, Intent intent) {                String action = intent.getAction();                if (BluetoothDevice.ACTION_PAIRING_REQUEST.equals(action)) {                    Log.i("information", "hello i am a dialog~~~~~");                    Intent btIntent = new Intent(BluetoothDevice.ACTION_BOND_STATE_CHANGED);                    intent.putExtra(BluetoothDevice.EXTRA_BOND_STATE, BluetoothDevice.BOND_BONDED);                    sendBroadcast(btIntent);                }            }        };        filter = new IntentFilter();        filter.addAction(BluetoothDevice.ACTION_PAIRING_REQUEST);        registerReceiver(receiver, filter);        //class:        getInformationText = (TextView) findViewById(R.id.tv);        getInformationText.append("\n");        btAdapter = BluetoothAdapter.getDefaultAdapter();        //打开蓝牙        if (btAdapter.enable()) {            Toast.makeText(this, "蓝牙已成功打开", Toast.LENGTH_LONG).show();            btAdress = btAdapter.getAddress();            Log.i("information", UUID.randomUUID().toString());            //让自己的蓝牙设备永远地可以被搜索到            Intent intent = new Intent(BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE);            intent.putExtra(BluetoothAdapter.EXTRA_DISCOVERABLE_DURATION, 0);            startActivity(intent);            new btGetConnectionThread(btAdapter).start();        } else {            Toast.makeText(this, "请打开蓝牙！", Toast.LENGTH_LONG).show();        }        //初始化handler        handler = new Handler() {            @Override            public void handleMessage(Message msg) {                super.handleMessage(msg);                final String information = ((String) msg.obj);                Log.i("information", information + "-----------" + isRunning);                if (isRunning) {                    get_And_Do(information);                } else {                    //发送信息到下一个界面                    sendBroadcast(new Intent("send_to_me").putExtra("the_order", information));                }                //getInformationText.append("     Zzm: " + information + "\n");            }        };    }    public void click(View view) {        Toast.makeText(this, "已开启连接！", Toast.LENGTH_LONG).show();        new btGetConnectionThread(btAdapter).start();    }    //等待请求的连接    private class btGetConnectionThread extends Thread {        private BluetoothServerSocket btServerSocket;        private BluetoothSocket btSocket;        public btGetConnectionThread(BluetoothAdapter btAdapter) {            try {                btServerSocket = btAdapter.listenUsingRfcommWithServiceRecord(UUID.randomUUID().toString(),                        UUID.fromString(uuid));                if (btServerSocket == null) {                    Toast.makeText(MainActivity.this, "蓝牙建立连接失败！", Toast.LENGTH_LONG).show();                    return;                } else {                    Toast.makeText(MainActivity.this, "蓝牙正在等待连接！", Toast.LENGTH_LONG).show();                }            } catch (IOException e) {                Log.i("information", e.toString());            }        }        @Override        public void run() {            super.run();            //等待客户端来的连接            try {                btSocket = btServerSocket.accept();            } catch (IOException e) {                // Toast.makeText(MainActivity.this,"蓝牙连接，接收失败！",Toast.LENGTH_LONG).show();                new btGetConnectionThread(btAdapter).start();                return;            }            if (btSocket != null) {                try {                    // Toast.makeText(MainActivity.this,"蓝牙连接成功！",Toast.LENGTH_LONG).show();                    btServerSocket.close();                    try {                        input = btSocket.getInputStream();                        output = btSocket.getOutputStream();                        new GetInformationThread().start();                    } catch (IOException e) {                        Log.i("information", "获取流失败！");                    }                    //连接成功后要做的事情                } catch (IOException e) {                    Log.i("information", e.toString());                    //    Toast.makeText(MainActivity.this,"蓝牙连接关闭失败！正在重新等待连接！",Toast.LENGTH_LONG).show();                    new btGetConnectionThread(btAdapter).start();                    return;                }            } else {                Log.i("information", "获取，socket失败！");                //  Toast.makeText(MainActivity.this,"蓝牙连接失败，正在重新等待连接！",Toast.LENGTH_LONG).show();                new btGetConnectionThread(btAdapter).start();                //Looper.loop();                return;            }        }    }    //连接后接收信息的线程    private class GetInformationThread extends Thread {        @Override        public void run() {            super.run();            boolean is = true;            while (is) {                byte[] bytes = new byte[1024];                int length = 0;                String getInformation = null;                if (input != null || output != null) {                    try {                        length = input.read(bytes);                        getInformation = new String(bytes, 0, length, "utf-8");                        //处理信息                        Message message = new Message();                        message.obj = getInformation;                        handler.sendMessage(message);                    } catch (IOException e) {                        Log.i("information", e.toString());                    }                }            }        }    }    //写的监听事件    @Override    public void onClick(View v) {        switch (v.getId()) {            case R.id.one:                //方法：下面同上                one();                break;            case R.id.two:                two();                break;            case R.id.three:                three();                break;            case R.id.four:                four();                break;            case R.id.five:                five();                break;            case R.id.six:                six();                break;        }    }    //各个控制的方法    private void one() {        isRunning = false;        startActivity(new Intent(this, One.class));    }    private void two() {        startActivity(new Intent(this, Two.class));        isRunning = false;    }    private void three() {        startActivity(new Intent(this, Three.class));        isRunning = false;    }    private void four() {        startActivity(new Intent(this, Four.class));        isRunning = false;    }    private void five() {        startActivity(new Intent(this, Five.class));        isRunning = false;    }    private void six() {        startActivity(new Intent(this, Six.class));        isRunning = false;    }    //得到控制端的信息再做出相应的反应    private void get_And_Do(String information) {        switch (information) {            case "left":                if (position != 1 && position != 4) {                    map.get(position).setEnabled(false);                    map.get(position - 1).setEnabled(true);                    position -= 1;                }                break;            case "front":                if (position != 1 && position != 2 && position != 3) {                    map.get(position).setEnabled(false);                    map.get(position - 3).setEnabled(true);                    position -= 3;                }                break;            case "down":                if (position != 4 && position != 5 && position != 6) {                    map.get(position).setEnabled(false);                    map.get(position + 3).setEnabled(true);                    position += 3;                }                break;            case "right":                if (position != 6 && position != 3) {                    map.get(position).setEnabled(false);                    map.get(position + 1).setEnabled(true);                    position += 1;                }                break;            case "sure":                map.get(position).callOnClick();                break;        }    }}
    

客户端：

import android.bluetooth.BluetoothAdapter;import android.bluetooth.BluetoothDevice;import android.bluetooth.BluetoothSocket;import android.content.BroadcastReceiver;import android.content.Context;import android.content.Intent;import android.content.IntentFilter;import android.os.Bundle;import android.os.Handler;import android.os.Looper;import android.support.v7.app.AppCompatActivity;import android.text.TextUtils;import android.util.Log;import android.view.View;import android.widget.Button;import android.widget.EditText;import android.widget.TextView;import android.widget.Toast;import java.io.IOException;import java.io.InputStream;import java.io.OutputStream;import java.io.UnsupportedEncodingException;import java.util.UUID;public class Android_below_four_zero extends AppCompatActivity {    private TextView textView1;    private TextView textView2;    private BluetoothAdapter btAdapter;    final int STARTBLUETOOTH = 1994;    final int SCANBLUETOOTH = 2010;    private BluetoothSocket btSocket;    private Handler handler1;    private InputStream input;    private OutputStream output;    private BroadcastReceiver btResult;    private BluetoothDevice btDevice;    //UUID    final String uuid = "af3ad9b2-0ea6-4a90-be06-a1c86bc7e28b";    private EditText sendInformation;    private Button sending;    private Button front;    private Button down;    private Button left;    private Button right;    private Button sure;    private Button back;    private ControlOrder order;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        //initialView        textView1 = (TextView) findViewById(R.id.Bt1);        textView2 = (TextView) findViewById(R.id.Bt2);        front = (Button) findViewById(R.id.front);        down = (Button) findViewById(R.id.down);        left = (Button) findViewById(R.id.left);        right = (Button) findViewById(R.id.right);        sure = (Button) findViewById(R.id.sure);        back = (Button) findViewById(R.id.back);        sendInformation = ((EditText) findViewById(R.id.send));        sending = ((Button) findViewById(R.id.sending));        //获取蓝牙设备管理对象        btAdapter = BluetoothAdapter.getDefaultAdapter();        //判断蓝牙是否打开，如果没有就会提醒打开        if (btAdapter.isEnabled()) {            Toast.makeText(this, "蓝牙已成功打开", Toast.LENGTH_SHORT).show();            textView1.setText("本地蓝牙的名字：" + btAdapter.getName());            //扫描设备            bluetoothScaning(btAdapter);        } else {            startActivityForResult(new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE), STARTBLUETOOTH);        }        //发现设备的广播        btResult = new BroadcastReceiver() {            @Override            public void onReceive(Context context, Intent intent) {                String action = intent.getAction();                Log.i("information", "---------" + action);                if (BluetoothDevice.ACTION_FOUND.equals(action)) {                    btDevice =intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);                    if (null == btDevice) {                        Toast.makeText(context, "未发现设备", Toast.LENGTH_SHORT).show();                    } else {                        textView2.setText("扫描到的蓝牙的名字：" + btDevice.getName());                    }                }                if (BluetoothAdapter.ACTION_DISCOVERY_FINISHED.equals(action)) {                    Toast.makeText(context, "搜索蓝牙完成", Toast.LENGTH_SHORT).show();                }                if (BluetoothDevice.ACTION_BOND_STATE_CHANGED.equals(action)) {                    int state = btDevice.getBondState();                    if (state == BluetoothDevice.BOND_BONDED)                        Toast.makeText(context, "完成配对", Toast.LENGTH_SHORT).show();                    if (state == BluetoothDevice.BOND_BONDING)                        Log.i("information","正在配对");                    if (state == BluetoothDevice.BOND_NONE)                        Log.i("information","配对取消");                }                if (BluetoothDevice.ACTION_PAIRING_REQUEST.equals(action)) {                    Toast.makeText(context, "正在请求配对！", Toast.LENGTH_SHORT).show();                    //BluetoothaAutoConnectUtils.setPassWord(btDevice.getClass(),btDevice,"0000");                }            }        };        //注册广播        IntentFilter filter = new IntentFilter();        filter.addAction(BluetoothDevice.ACTION_BOND_STATE_CHANGED);        filter.addAction(BluetoothAdapter.ACTION_DISCOVERY_FINISHED);        filter.addAction(BluetoothDevice.ACTION_FOUND);        filter.addAction(BluetoothDevice.ACTION_PAIRING_REQUEST);        registerReceiver(btResult, filter);    }    //打开蓝牙后返回的数据    @Override    protected void onActivityResult(int requestCode, int resultCode, Intent data) {        super.onActivityResult(requestCode, resultCode, data);        if (requestCode == STARTBLUETOOTH && resultCode == RESULT_OK) {            Toast.makeText(this, "蓝牙已成功打开", Toast.LENGTH_SHORT).show();            textView1.setText("本地蓝牙的名字：" + btAdapter.getName());            bluetoothScaning(btAdapter);        } else if (requestCode == SCANBLUETOOTH && resultCode == RESULT_OK) {            /            //        } else {            Toast.makeText(this, "蓝牙操作失败", Toast.LENGTH_LONG).show();            Toast.makeText(this, "" + requestCode + "     " + resultCode, Toast.LENGTH_LONG).show();        }        //    }    //蓝牙扫描的方法    private void bluetoothScaning(BluetoothAdapter btAdapter) {        if (btAdapter.getScanMode() == BluetoothAdapter.SCAN_MODE_NONE) {            //如果没在扫描则开启扫描            Intent btIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE);            //设置扫描时间            btIntent.putExtra(BluetoothAdapter.EXTRA_DISCOVERABLE_DURATION, 6000);            startActivityForResult(btIntent, SCANBLUETOOTH);            // Log.i("information","hello");        } else {            //如果在扫描，或则已经获取了结果,开启重新扫描            if (!btAdapter.isDiscovering()) {                btAdapter.startDiscovery();            } else {                //停止扫描重新扫描                btAdapter.cancelDiscovery();                btAdapter.startDiscovery();            }        }    }    //解除注册的广播    @Override    protected void onDestroy() {        unregisterReceiver(btResult);        btAdapter.disable();        super.onDestroy();    }    //重新连接    public void click(View view) {        bluetoothScaning(btAdapter);    }    //执行连接    public void click_1(View view) {         new BtConnectThread(btDevice).start();        // BluetoothaAutoConnectUtils.createConnection(btDevice.getClass(),btDevice);    }    //建立请求连接蓝牙的线程    private class BtConnectThread extends Thread {        public BtConnectThread(BluetoothDevice btDevice) {            //获取通信Socket            if (null != btDevice) {                try {                    btSocket = btDevice.createInsecureRfcommSocketToServiceRecord(UUID.fromString(uuid));                } catch (IOException e) {                    Toast.makeText(Android_below_four_zero.this, "蓝牙建立连接失败", Toast.LENGTH_SHORT).show();                }            } else {                Toast.makeText(Android_below_four_zero.this, "蓝牙未搜索到设备", Toast.LENGTH_SHORT).show();            }        }        @Override        public void run() {            super.run();            Looper.prepare();            if (btSocket != null) {                try {                    btAdapter.cancelDiscovery();                    //连接                    btSocket.connect();                    if (!btSocket.isConnected()) {                        Toast.makeText(Android_below_four_zero.this, "蓝牙连接失败，请重试", Toast.LENGTH_SHORT).show();                    } else {                        if (!btDevice.getName().equals("null")) {                            Toast.makeText(Android_below_four_zero.this, "与 " + btDevice.getName() + " 蓝牙设备连接成功", Toast.LENGTH_SHORT).show();                            try {                                input = btSocket.getInputStream();                                output = btSocket.getOutputStream();                                if (null != output) {                                    Log.i("information", "---------------------11");                                    control();                                }                                if (null != input) {                                    Log.i("information", "---------------------22");                                }                            } catch (IOException e) {                                Log.i("information", "获取流失败！");                            }                            Looper.loop();                        } else {                            Toast.makeText(Android_below_four_zero.this, "蓝牙连接成功", Toast.LENGTH_SHORT).show();                            try {                                input = btSocket.getInputStream();                                output = btSocket.getOutputStream();                                control();                            } catch (IOException e) {                                Log.i("information", "获取流失败！");                            }                            Looper.loop();                        }                        //连接成功时候的操作                    }                } catch (Exception e) {                    Toast.makeText(Android_below_four_zero.this, "蓝牙连接超时，请重试", Toast.LENGTH_SHORT).show();                    Log.i("information", e.toString());                    Looper.loop();                }            }        }    }    //链接后的处理线程    private class BtConnect extends Thread {        @Override        public void run() {            super.run();        }    }    //链接后发送信息    public void click_2(View view) {        if (null == output || null == input) {            Toast.makeText(Android_below_four_zero.this, "蓝牙连接异常！不能发信息", Toast.LENGTH_SHORT).show();        } else {            String information = sendInformation.getText().toString();            if (TextUtils.isEmpty(information)) {                Toast.makeText(Android_below_four_zero.this, "不能发送空信息！", Toast.LENGTH_LONG).show();            } else {                //发送信息                byte[] bytes = new byte[0];                try {                    bytes = information.getBytes("utf-8");                } catch (UnsupportedEncodingException e) {                    e.printStackTrace();                }                try {                    output.write(bytes);                    Log.i("information", information);                    Toast.makeText(Android_below_four_zero.this, "发送信息成功！", Toast.LENGTH_LONG).show();                } catch (IOException e) {                    Toast.makeText(Android_below_four_zero.this, "发送信息失败！", Toast.LENGTH_LONG).show();                }            }        }        sendInformation.setText("");    }    //初始化监听器以及监听    private void control() {        order = new ControlOrder(this, output, R.id.front,                R.id.down,                R.id.left,                R.id.right,                R.id.sure,                R.id.back);        //设置指令监听        front.setOnClickListener(order);        down.setOnClickListener(order);        left.setOnClickListener(order);        right.setOnClickListener(order);        sure.setOnClickListener(order);        back.setOnClickListener(order);    }}