Android BLE与终端通信（四）——实现服务器与客户端即时通讯功能

---

前面几篇一直在讲一些基础，其实说实话，蓝牙主要为多的还是一些概念性的东西，当你把概念都熟悉了之后，你会很简单的就可以实现一些逻辑，主要是Socket和I/O流的操作，今天就来一起做一个聊天的小程序，我们都知道，我们实现蓝牙连接，蓝牙是有主从关系的，所以有客户端和服务端之分，我们新建一个工程——BLE_QQ(hh,毕竟是即时通讯嘛，和QQ挨个边)

参考Google的API：http://developer.android.com/guide/topics/connectivity/bluetooth.html

在开始之前，别忘了添加权限

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

一.OpenBluetooth

Google的API上说的是十分的清楚，我们作为初学者要把他当做说明书一样来看待

这样的话，我们就来实现打开蓝牙并且打开可见性，可见性默认是120s，MAX为3600s，这里在强调一遍，打开蓝牙有两种方式，一种是弹框提示，一种是强制打开，这在之前也是提过好多次了的

/**     * 打开蓝牙并且搜索     */    public void openBluetooth(View v) {        // 开启搜索        Intent discoverableIntent = new Intent(                BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE);        // 设置可见性300s        discoverableIntent.putExtra(                BluetoothAdapter.EXTRA_DISCOVERABLE_DURATION, 300);        startActivity(discoverableIntent);        // 强制打开        // mBluetoothAdapter.enable();    }

CloseBluetooth

关闭蓝牙也就直接调用BluetoothAdapter的disable()方法;

    /**     * 关闭蓝牙     */    public void closeBluetooth(View v) {        mBluetoothAdapter.disable();    }

客户端

我们在MainActivity中写一个button直接跳转到ClientActivity中去

    /**     * 打开客户端     */    public void Client(View v) {        startActivity(new Intent(this, ClientActivity.class));    }

ClientActivity

package com.example.ble_qq;import java.io.BufferedReader;import java.io.IOException;import java.io.InputStreamReader;import java.io.PrintStream;import java.net.SocketOptions;import java.util.UUID;import com.example.ble_qq.ServiceActivity.ReceiverInfoThread;import android.app.Activity;import android.bluetooth.BluetoothAdapter;import android.bluetooth.BluetoothDevice;import android.bluetooth.BluetoothServerSocket;import android.bluetooth.BluetoothSocket;import android.os.Bundle;import android.os.Handler;import android.os.Message;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;/** * 客户端 *  * @author LGL * */public class ClientActivity extends Activity {    // 连接成功    private static final int CONN_SUCCESS = 0x1;    // 连接失败    private static final int CONN_FAIL = 0x2;    private static final int RECEIVER_INFO = 0x3;    // 设置文本框为空    private static final int SET_EDITTEXT_NULL = 0x4;    // 接收到的消息    private TextView tv_content;    // 输入框    private EditText et_info;    // 发送按钮    private Button btn_send;    // 本地蓝牙适配器    private BluetoothAdapter mBluetoothAdapter = null;    // 远程设备    private BluetoothDevice device = null;    // 蓝牙设备Socket客户端    private BluetoothSocket socket = null;    private boolean isReceiver = true;    // 设备名称    private static final String NAME = "LGL";    // 输入输出流    private PrintStream out;    private BufferedReader in;    @Override    protected void onCreate(Bundle savedInstanceState) {        // TODO Auto-generated method stub        super.onCreate(savedInstanceState);        setTitle("客户端");        setContentView(R.layout.activity_client);        initView();        // 初始化Socket客户端连接        init();    }    private void initView() {        // 初始化        tv_content = (TextView) findViewById(R.id.tv_content);        et_info = (EditText) findViewById(R.id.et_info);        btn_send = (Button) findViewById(R.id.btn_send);    }    private void init() {        tv_content.setText("客户端已经启动，正在与服务端连接...\n");        // 开始连接        new Thread(new Runnable() {            @Override            public void run() {                try {                    // 得到本地蓝牙适配器                    mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();                    // 通过本地适配器得到地址,这个地址可以公共扫描来获取，就是getAddress()返回的地址                    device = mBluetoothAdapter                            .getRemoteDevice("98:6C:F5:CE:0E:81");                    // 根据UUID返回一个socket,要与服务器的UUID一致                    socket = device.createRfcommSocketToServiceRecord(UUID                            .fromString("00000000-2527-eef3-ffff-ffffe3160865"));                    if (socket != null) {                        // 连接                        socket.connect();                        // 处理流                        out = new PrintStream(socket.getOutputStream());                        in = new BufferedReader(new InputStreamReader(socket                                .getInputStream()));                    }                    // 连接成功发送handler                    handler.sendEmptyMessage(CONN_SUCCESS);                } catch (IOException e) {                    // TODO Auto-generated catch block                    e.printStackTrace();                    Message mes = handler.obtainMessage(CONN_FAIL,                            e.getLocalizedMessage());                    handler.sendMessage(mes);                }            }        }).start();    }    /**     * Handler接收消息     *      */    private Handler handler = new Handler() {        public void handleMessage(Message msg) {            switch (msg.what) {            case CONN_SUCCESS:                setInfo("连接成功! \n");                btn_send.setEnabled(true);                Log.i("设备的名称", device.getName());                Log.i("设备的UUID", device.getUuids() + "");                Log.i("设备的地址", device.getAddress());                // 开始接收信息                new Thread(new ReceiverInfoThread()).start();                break;            case CONN_FAIL:                setInfo("连接失败! \n");                setInfo(msg.obj.toString() + "\n");                break;            case RECEIVER_INFO:                setInfo(msg.obj.toString() + "\n");                break;            case SET_EDITTEXT_NULL:                et_info.setText("");                break;            }        }    };    /**     * 接收消息的线程     */    class ReceiverInfoThread implements Runnable {        @Override        public void run() {            String info = null;            while (isReceiver) {                try {                    info = in.readLine();                    Message msg = handler.obtainMessage(RECEIVER_INFO);                    handler.sendMessage(msg);                } catch (IOException e) {                    // TODO Auto-generated catch block                    e.printStackTrace();                }            }        }    }    /**     * 发送消息     */    public void SendText(View v) {        final String text = et_info.getText().toString();        // 不能为空        if (!TextUtils.isEmpty(text)) {            Toast.makeText(this, "不能为空", Toast.LENGTH_SHORT).show();        }        new Thread(new Runnable() {            @Override            public void run() {                // 输出                out.println(text);                out.flush();                // 把文本框设置为空                handler.sendEmptyMessage(SET_EDITTEXT_NULL);            }        }).start();    }    /**     * 拼接文本信息     */    private void setInfo(String info) {        StringBuffer sb = new StringBuffer();        sb.append(tv_content.getText());        sb.append(info);        tv_content.setText(sb);    }}

服务端

我们在MainActivity中写一个button直接跳转到ServiceActivity中去

    /**     * 打开服务端     */    public void Service(View v) {        startActivity(new Intent(this, ServiceActivity.class));    }

ServiceActivity

package com.example.ble_qq;import java.io.BufferedReader;import java.io.IOException;import java.io.InputStreamReader;import java.io.PrintStream;import java.util.UUID;import android.app.Activity;import android.bluetooth.BluetoothAdapter;import android.bluetooth.BluetoothServerSocket;import android.bluetooth.BluetoothSocket;import android.os.Bundle;import android.os.Handler;import android.os.IBinder;import android.os.Message;import android.text.TextUtils;import android.view.View;import android.widget.Button;import android.widget.EditText;import android.widget.TextView;import android.widget.Toast;/** * 服务端 *  * @author LGL * */public class ServiceActivity extends Activity {    // 连接成功    private static final int CONN_SUCCESS = 0x1;    // 连接失败    private static final int CONN_FAIL = 0x2;    private static final int RECEIVER_INFO = 0x3;    // 设置文本框为空    private static final int SET_EDITTEXT_NULL = 0x4;    // 接收到的消息    private TextView tv_content;    // 输入框    private EditText et_info;    // 发送按钮    private Button btn_send;    // 本地蓝牙适配器    private BluetoothAdapter mBluetoothAdapter = null;    // 蓝牙设备Socket服务端    private BluetoothServerSocket serviceSocket = null;    // 蓝牙设备Socket客户端    private BluetoothSocket socket = null;    // 设备名称‘    private static final String NAME = "LGL";    private boolean isReceiver = true;    // 输入输出流    private PrintStream out;    private BufferedReader in;    @Override    protected void onCreate(Bundle savedInstanceState) {        // TODO Auto-generated method stub        super.onCreate(savedInstanceState);        setTitle("服务端");        setContentView(R.layout.activity_service);        initView();        // 创建蓝牙服务端的Socket        initService();    }    private void initView() {        // 初始化        tv_content = (TextView) findViewById(R.id.tv_content);        et_info = (EditText) findViewById(R.id.et_info);        btn_send = (Button) findViewById(R.id.btn_send);    }    private void initService() {        tv_content.setText("服务器已经启动，正在等待设备连接...\n");        // 开启线程操作        new Thread(new Runnable() {            @Override            public void run() {                // 得到本地适配器                mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();                // 创建蓝牙Socket服务端                try {                    // 服务端地址                    serviceSocket = mBluetoothAdapter                            .listenUsingInsecureRfcommWithServiceRecord(                                    NAME,                                    UUID.fromString("00000000-2527-eef3-ffff-ffffe3160865"));                    // 阻塞线程等待连接                    socket = serviceSocket.accept();                    if (socket != null) {                        // I/O流                        out = new PrintStream(socket.getOutputStream());                        in = new BufferedReader(new InputStreamReader(socket                                .getInputStream()));                    }                    // 连接成功发送handler                    handler.sendEmptyMessage(CONN_SUCCESS);                } catch (IOException e) {                    // TODO Auto-generated catch block                    e.printStackTrace();                    Message mes = handler.obtainMessage(CONN_FAIL,                            e.getLocalizedMessage());                    handler.sendMessage(mes);                }            }        }).start();    }    /**     * Handler接收消息     *      */    private Handler handler = new Handler() {        public void handleMessage(Message msg) {            switch (msg.what) {            case CONN_SUCCESS:                setInfo("连接成功! \n");                btn_send.setEnabled(true);                new Thread(new ReceiverInfoThread()).start();                break;            case CONN_FAIL:                setInfo("连接失败! \n");                setInfo(msg.obj.toString() + "\n");                break;            case RECEIVER_INFO:                setInfo(msg.obj.toString() + "\n");                break;            case SET_EDITTEXT_NULL:                et_info.setText("");                break;            }        }    };    /**     * 接收消息的线程     */    class ReceiverInfoThread implements Runnable {        @Override        public void run() {            String info = null;            while (isReceiver) {                try {                    info = in.readLine();                    Message msg = handler.obtainMessage(RECEIVER_INFO);                    handler.sendMessage(msg);                } catch (IOException e) {                    // TODO Auto-generated catch block                    e.printStackTrace();                }            }        }    }    /**     * 发送消息     */    public void SendText(View v) {        final String text = et_info.getText().toString();        // 不能为空        if (!TextUtils.isEmpty(text)) {            Toast.makeText(this, "不能为空", Toast.LENGTH_SHORT).show();        }        new Thread(new Runnable() {            @Override            public void run() {                // 输出                out.println(text);                out.flush();                // 把文本框设置为空                handler.sendEmptyMessage(SET_EDITTEXT_NULL);            }        }).start();    }    /**     * 拼接文本信息     */    private void setInfo(String info) {        StringBuffer sb = new StringBuffer();        sb.append(tv_content.getText());        sb.append(info);        tv_content.setText(sb);    }}

XML

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical" >    <TextView        android:id="@+id/tv_content"        android:layout_width="match_parent"        android:layout_height="0dp"        android:layout_weight="1" />    <EditText        android:id="@+id/et_info"        android:layout_width="match_parent"        android:layout_height="wrap_content" />    <Button        android:id="@+id/btn_send"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:onClick="SendText"        android:text="发送" /></LinearLayout>

实际上运行结果是这样的，我们必须准备两部手机，然后先用蓝牙配对，在进行连接

这样我们两个设备就配对成功了

Demo下载地址：http://download.csdn.net/detail/qq_26787115/9420355