Android无线蓝牙开发总结

2016年12月25日 17:06:21 峥嵘life 阅读数：4091 标签： android 蓝牙通信更多

个人分类： android

一.蓝牙基础知识

蓝牙（Bluetooth）是一种短距离的无线通信技术标准。这个名子来源于10世纪丹麦国王Harald Blatand，英文名子是Harold Bluetooth。

（一）蓝牙的四层协议

蓝牙协议分为4层，即核心协议层、电缆替代协议层、电话控制协议层和采纳的其它协议层。这4种协议中最重要的是核心协议。蓝牙的核心协议包括基带、链路管理、逻辑链路控制和适应协议四部分。其中链路管理（LMP）负责蓝牙组件间连接的建立。逻辑链路控制与适应协议（L2CAP）位于基带协议层上，属于数据链路层，是一个为高层传输和应用层协议屏蔽基带协议的适配协议。

（二）蓝牙的操作

Android提供蓝牙API来执行这些不同的操作。
1. 开关蓝牙
2. 扫描其他蓝牙设备
3. 获取配对设备列表
4. 连接到通过服务发现其他设备

（三）蓝牙权限

1. android.permission.BLUETOOTH:

允许程序连接到已配对的蓝牙设备,请求连接/接收连接/传输数据需要改权限, 主要用于对配对后进行操作;

2. android.permission.BLUETOOTH_ADMIN :

允许程序发现和配对蓝牙设备, 该权限用来管理蓝牙设备, 有了这个权限, 应用才能使用本机的蓝牙设备, 主要用于对配对前的操作;

（四）BluetoothAdapter

BluetoothAdapter代表了移动设备的本地的蓝牙适配器, 通过该蓝牙适配器可以对蓝牙进行基本操作
BluetoothAdapter.getDefaultAdapter()该静态方法可以获取该适配器对象.

（五）蓝牙的BluetoothAdapter .STATE 状态值，即开关状态

1.蓝牙关闭 int STATE_OFF //值为10, 蓝牙模块处于关闭状态;
2.蓝牙打开中 int STATE_TURNING_ON //值为11, 蓝牙模块正在打开;
3.蓝牙开启 int STATE_ON //值为12, 蓝牙模块处于开启状态;
4. 蓝牙开启中 int STATE_TURNING_OFF //值为13, 蓝牙模块正在关闭;
蓝牙开关状态顺序 : STATE_OFF –> STATE_TURNING_ON –> STATE_ON –>STATE_TURNING_OFF –> STATE_OFF;

（六）BluetoothAdapter SCAN_MOD状态值，即扫描状态

无功能状态 : int SCAN_MODE_NONE //值为20, 查询扫描和页面扫描都失效,
该状态下蓝牙模块既不能扫描其它设备, 也不可见;

扫描状态 : int SCAN_MODE_CONNECTABLE //值为21, 查询扫描失效, 页面扫描有效,
该状态下蓝牙模块可以扫描其它设备, 从可见性来说只对已配对的蓝牙设备可见, 只有配对的设备才能主动连接本设备;

可见状态 : int SCAN_MODE_CONNECTABLE_DISCOVERABLE //值为23, 查询扫描和页
面扫描都有效;

（七）打开/关闭蓝牙的两种方法：

1.直接调用函数enable()去打开蓝牙设备；

2.系统API去打开蓝牙设备，该方式会弹出一个对话框样式的Activity供用户选择是否打开蓝牙设备。

代码示例：

<span style="color:#000000"><code><span style="color:#880000">//第一种启动蓝牙的方法，不推荐</span>
<span style="color:#880000">//bluetoothAdapter.enable();</span>
<span style="color:#880000">//第二种启动蓝牙的方法，推荐</span>
startActivityForResult(<span style="color:#000088">new</span> Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE), REQUEST_ENABLE);
<span style="color:#880000">//第二种方法要写数据回调方法</span>
<span style="color:#880000">/**
 * 数据回调方法
 */</span>
<span style="color:#9b859d">@Override</span>
<span style="color:#000088">protected</span> <span style="color:#000088">void</span> <span style="color:#009900">onActivityResult</span>(<span style="color:#000088">int</span> requestCode, <span style="color:#000088">int</span> resultCode, Intent data) {
    <span style="color:#000088">super</span>.onActivityResult(requestCode, resultCode, data);
    <span style="color:#000088">if</span> (requestCode == REQUEST_ENABLE) {
        <span style="color:#000088">if</span> (resultCode == RESULT_OK) {
            Toast.makeText(<span style="color:#000088">this</span>, <span style="color:#009900">"蓝牙已开启"</span>, Toast.LENGTH_SHORT).show();
           <span style="color:#880000">// getMyBondedDevices();//获取绑定的蓝牙设备</span>
            adapter.notifyDataSetChanged();<span style="color:#880000">//刷新适配器</span>
        } <span style="color:#000088">else</span> {
            Toast.makeText(<span style="color:#000088">this</span>, <span style="color:#009900">"蓝牙未开启"</span>, Toast.LENGTH_SHORT).show();
        }
    } 
}</code></span>

（八)关闭蓝牙，直接调用API 函数即disable()即可。

public boolean disable ()
返回值：该函数会立即返回。
1.true 表示关闭操作成功
2. false 表示蓝牙操作失败， ①、当前蓝牙已经关闭； ②、其他一些异常情况

（九）扫描蓝牙设备

<span style="color:#000000"><code>  1.public boolean startDiscovery () 
      功能： 扫描蓝牙设备的开启
      注意： 如果蓝牙没有开启，该方法会返回false ，即不会开始扫描过程。

  2.public  boolean cancelDiscovery ()
     功能： 取消扫描过程。
     注意： 如果蓝牙没有开启，该方法会返回false。

 3.public boolean isDiscovering ()
    功能： 是否正在处于扫描过程中。
    注意： 如果蓝牙没有开启，该方法会返回false。
</code></span>

这里要特别注意，蓝牙扫描的时候，它会发出系统的广播，这是我们就要创建广播接收者来接收数据，数据里面就有蓝牙的设备对象和名称等等，广播也是蓝牙知识的重中之重。

（十）蓝牙的广播

Action值	说明
ACTION_STATE_CHANGED	蓝牙状态值发生改变
*ACTION_SCAN_MODE_CHANGED	蓝牙扫描状态(SCAN_MODE)发生改变*
ACTION_DISCOVERY_STARTED	蓝牙扫描过程开始
ACTION_DISCOVERY_FINISHED	蓝牙扫描过程结束
ACTION_LOCAL_NAME_CHANGED	蓝牙设备Name发生改变
ACTION_REQUEST_DISCOVERABLE	请求用户选择是否使该蓝牙能被扫描

PS：如果蓝牙没有开启，用户点击确定后，会首先开启蓝牙，继而设置蓝牙能被扫描。
Action值： ACTION_REQUEST_ENABLE // 请求用户选择是否打开蓝牙
示例：
创建广播接收者：

<span style="color:#000000"><code><span style="color:#880000">/**
 * 广播接收者的创建
 */</span>
<span style="color:#000088">private</span> BroadcastReceiver receiver = <span style="color:#000088">new</span> BroadcastReceiver() {
    <span style="color:#9b859d">@Override</span>
    <span style="color:#000088">public</span> <span style="color:#000088">void</span> <span style="color:#009900">onReceive</span>(Context context, Intent intent) {
        <span style="color:#880000">//获取设备的发送的广播</span>
        <span style="color:#880000">//做数据处理</span>
     }
};</code></span>

注册广播接收者

<span style="color:#000000"><code><span style="color:#880000">/**
 * 广播的注册，注意这里Action可以添加多个
 */</span>
<span style="color:#9b859d">@Override</span>
<span style="color:#000088">protected</span> <span style="color:#000088">void</span> <span style="color:#009900">onResume</span>() {
    <span style="color:#000088">super</span>.onResume();
<span style="color:#880000">//添加蓝牙广播的Action，发现蓝牙设备时的Action</span>
    IntentFilter intentFilter = <span style="color:#000088">new</span> 
IntentFilter(BluetoothDevice.ACTION_FOUND);
<span style="color:#880000">//添加蓝牙广播的Action，蓝牙设备扫描完毕时的Action </span>
intentFilter.addAction(BluetoothAdapter.ACTION_DISCOVERY_FINISHED);
    registerReceiver(receiver, intentFilter);<span style="color:#880000">//注册广播接收者</span>
}</code></span>

广播的注销

<span style="color:#000000"><code><span style="color:#880000">/**
 * 广播的停止
 */</span>
<span style="color:#9b859d">@Override</span>
<span style="color:#000088">protected</span> <span style="color:#000088">void</span> <span style="color:#009900">onPause</span>() {
    <span style="color:#000088">super</span>.onPause();
    unregisterReceiver(receiver);<span style="color:#880000">//取消广播</span>
}</code></span>

一般监听发现蓝牙和蓝牙扫描完成的广播就可以了。
通过广播接收数据后，再对数据进行处理。就可以看到我们手机上显示的蓝牙设设备名称和其他信息。

（十一）获取蓝牙的相关信息的方法

1.public String getName ()

功能：获取蓝牙设备Name

2.public String getAddress ()

功能：获取蓝牙设备的硬件地址(MAC地址)，例如：00:11:22:AA:BB:CC

3.public boolean setName (String name)

功能：设置蓝牙设备的Name。

4.public SetgetBondedDevices ()

功能：获取与本机蓝牙所有绑定的远程蓝牙信息，以BluetoothDevice类实例(稍后讲到)返回。
注意：如果蓝牙未开启，该函数会返回一个空集合。

5.public static boolean checkBluetoothAddress (String address)

<span style="color:#000000"><code> 功能：　验证蓝牙设备MAC地址是否有效。所有设备地址的英文字母必须大写，48位，形如：00:43:A8:23:10:F1 。
</code></span>

返回值： true 设备地址有效，false 设备地址无效

6.public BluetoothDevice getRemoteDevice (String address)

功能：以给定的MAC地址去创建一个 BluetoothDevice 类实例(代表远程蓝牙实例)。即使该蓝牙地址不可见，也会产生一个BluetoothDevice 类实例。
返回：BluetoothDevice 类实例。注意，如果该蓝牙设备MAC地址不能被识别，其蓝牙Name为null。
异常：如果MAC address无效，抛出IllegalArgumentException。

使用上面的方法就可以对蓝牙进行扫描显示。但是要使用蓝牙通信就要使用到Socket编程了。

二．蓝牙Socket通信

关于Socket编程，之前有一篇java的简介和使用示例：
http://blog.csdn.net/wenzhi20102321/article/details/52620323

（一）UUID

      在蓝牙中，每个服务和服务属性都唯一地由全局唯一标识符 ,Universally Unique Identifier（UUID）来校验。正如它的名字所暗示的，每一个这样的标识符都要在时空上保证唯一。UUID类可表现为短整形（16或32位）和长整形（128 位）UUID。他提供了分别利用String和16位或32位数值来创建类的构造函数，提供了一个可以比较两个UUID（如果两个都是128位）的方法，还有一个可以转换一个UUID为一个字符串的方法。UUID实例是不可改变的（immutable），只有被UUID标示的服务可以被发现。
      UUID的格式被分成5段，其中中间3段的字符数相同，都是4个，第1段是8个字符，最后一段是12个字符。所以UUID实际上是8个-4个-4个-4个-12个的字符串。

      UUID相当于Socket的端口，而蓝牙地址相当于Socket的IP。两个蓝牙设备进行连接时需要使用同一个UUID, 这是一个服务的唯一标识，而且这个UUID的值必须是
00001101-0000-1000-8000-00805F9B34FB

      上面这个UUID，直接复制使用就可以了。

下面是蓝牙Socket使用示例：

三．蓝牙Socket通信示例

程序实现两台手机的蓝牙发送消息，并接受消息。这里的蓝牙是不需要网络支持的。
程序运行后,扫描蓝牙后的界面：
Android无线蓝牙开发总结
程序进行通信后的界面，要两个手机哦！

两个手机，其中一个设置为服务器，然后点击连接的手机，就可以进行消息发送和接收了。
上面只是实现文本通信，文本也只是进行简单处理。

程序设计代码：

（一）添加权限

<span style="color:#000000"><code><span style="color:#006666"><<span style="color:#4f4f4f">uses-permission</span> <span style="color:#4f4f4f">android:name</span>=<span style="color:#009900">"android.permission.BLUETOOTH_ADMIN"</span> /></span>
<span style="color:#006666"><<span style="color:#4f4f4f">uses-permission</span> <span style="color:#4f4f4f">android:name</span>=<span style="color:#009900">"android.permission.BLUETOOTH"</span> /></span>
<span style="color:#880000"><!--6.0以上才要加的额外权限 --></span>
<span style="color:#006666"><<span style="color:#4f4f4f">uses-permission</span> <span style="color:#4f4f4f">android:name</span>=<span style="color:#009900">"android.permission.ACCESS_COARSE_LOCATION"</span> /></span></code></span>

（二）布局文件的设计

<span style="color:#000000"><code><span style="color:#006666"><?xml version="1.0" encoding="utf-8"?></span>
<span style="color:#006666"><<span style="color:#4f4f4f">LinearLayout</span> <span style="color:#4f4f4f">xmlns:android</span>=<span style="color:#009900">"http://schemas.android.com/apk/res/android"</span>
    <span style="color:#4f4f4f">android:layout_width</span>=<span style="color:#009900">"match_parent"</span>
    <span style="color:#4f4f4f">android:layout_height</span>=<span style="color:#009900">"match_parent"</span>
    <span style="color:#4f4f4f">android:orientation</span>=<span style="color:#009900">"vertical"</span>></span>

    <span style="color:#006666"><<span style="color:#4f4f4f">Button
</span>        <span style="color:#4f4f4f">android:layout_width</span>=<span style="color:#009900">"match_parent"</span>
        <span style="color:#4f4f4f">android:layout_height</span>=<span style="color:#009900">"wrap_content"</span>
        <span style="color:#4f4f4f">android:onClick</span>=<span style="color:#009900">"open"</span>
        <span style="color:#4f4f4f">android:text</span>=<span style="color:#009900">"开启蓝牙"</span> /></span>

    <span style="color:#006666"><<span style="color:#4f4f4f">Button
</span>        <span style="color:#4f4f4f">android:layout_width</span>=<span style="color:#009900">"match_parent"</span>
        <span style="color:#4f4f4f">android:layout_height</span>=<span style="color:#009900">"wrap_content"</span>
        <span style="color:#4f4f4f">android:onClick</span>=<span style="color:#009900">"close"</span>
        <span style="color:#4f4f4f">android:text</span>=<span style="color:#009900">"关闭蓝牙"</span> /></span>

    <span style="color:#006666"><<span style="color:#4f4f4f">Button
</span>        <span style="color:#4f4f4f">android:layout_width</span>=<span style="color:#009900">"match_parent"</span>
        <span style="color:#4f4f4f">android:layout_height</span>=<span style="color:#009900">"wrap_content"</span>
        <span style="color:#4f4f4f">android:onClick</span>=<span style="color:#009900">"found"</span>
        <span style="color:#4f4f4f">android:text</span>=<span style="color:#009900">"暴露自己的设备名称"</span> /></span>

    <span style="color:#006666"><<span style="color:#4f4f4f">Button
</span>        <span style="color:#4f4f4f">android:layout_width</span>=<span style="color:#009900">"match_parent"</span>
        <span style="color:#4f4f4f">android:layout_height</span>=<span style="color:#009900">"wrap_content"</span>
        <span style="color:#4f4f4f">android:onClick</span>=<span style="color:#009900">"scan"</span>
        <span style="color:#4f4f4f">android:text</span>=<span style="color:#009900">"扫描蓝牙设备"</span> /></span>

    <span style="color:#006666"><<span style="color:#4f4f4f">Button
</span>        <span style="color:#4f4f4f">android:layout_width</span>=<span style="color:#009900">"match_parent"</span>
        <span style="color:#4f4f4f">android:layout_height</span>=<span style="color:#009900">"wrap_content"</span>
        <span style="color:#4f4f4f">android:onClick</span>=<span style="color:#009900">"createServer"</span>
        <span style="color:#4f4f4f">android:text</span>=<span style="color:#009900">"设置为蓝牙服务端"</span> /></span>

    <span style="color:#006666"><<span style="color:#4f4f4f">Button
</span>        <span style="color:#4f4f4f">android:layout_width</span>=<span style="color:#009900">"match_parent"</span>
        <span style="color:#4f4f4f">android:layout_height</span>=<span style="color:#009900">"wrap_content"</span>
        <span style="color:#4f4f4f">android:onClick</span>=<span style="color:#009900">"listen"</span>
        <span style="color:#4f4f4f">android:text</span>=<span style="color:#009900">"监听数据的接收"</span> /></span>

    <span style="color:#006666"><<span style="color:#4f4f4f">LinearLayout
</span>        <span style="color:#4f4f4f">android:layout_width</span>=<span style="color:#009900">"match_parent"</span>
        <span style="color:#4f4f4f">android:layout_height</span>=<span style="color:#009900">"wrap_content"</span>
        <span style="color:#4f4f4f">android:orientation</span>=<span style="color:#009900">"horizontal"</span>></span>

        <span style="color:#006666"><<span style="color:#4f4f4f">EditText
</span>            <span style="color:#4f4f4f">android:id</span>=<span style="color:#009900">"@+id/et_send"</span>
            <span style="color:#4f4f4f">android:layout_width</span>=<span style="color:#009900">"0dp"</span>
            <span style="color:#4f4f4f">android:layout_height</span>=<span style="color:#009900">"wrap_content"</span>
            <span style="color:#4f4f4f">android:layout_weight</span>=<span style="color:#009900">"2"</span>
            <span style="color:#4f4f4f">android:singleLine</span>=<span style="color:#009900">"true"</span> /></span>

        <span style="color:#006666"><<span style="color:#4f4f4f">Button
</span>            <span style="color:#4f4f4f">android:id</span>=<span style="color:#009900">"@+id/btn_send"</span>
            <span style="color:#4f4f4f">android:layout_width</span>=<span style="color:#009900">"0dp"</span>
            <span style="color:#4f4f4f">android:layout_height</span>=<span style="color:#009900">"wrap_content"</span>
            <span style="color:#4f4f4f">android:layout_weight</span>=<span style="color:#009900">"1"</span>
            <span style="color:#4f4f4f">android:onClick</span>=<span style="color:#009900">"send"</span>
            <span style="color:#4f4f4f">android:text</span>=<span style="color:#009900">"send"</span> /></span>
    <span style="color:#006666"></<span style="color:#4f4f4f">LinearLayout</span>></span>

    <span style="color:#006666"><<span style="color:#4f4f4f">ScrollView
</span>        <span style="color:#4f4f4f">android:layout_width</span>=<span style="color:#009900">"match_parent"</span>
        <span style="color:#4f4f4f">android:layout_height</span>=<span style="color:#009900">"match_parent"</span>></span>

        <span style="color:#006666"><<span style="color:#4f4f4f">LinearLayout
</span>            <span style="color:#4f4f4f">android:layout_width</span>=<span style="color:#009900">"match_parent"</span>
            <span style="color:#4f4f4f">android:layout_height</span>=<span style="color:#009900">"match_parent"</span>
            <span style="color:#4f4f4f">android:orientation</span>=<span style="color:#009900">"vertical"</span>></span>

            <span style="color:#006666"><<span style="color:#4f4f4f">TextView
</span>                <span style="color:#4f4f4f">android:id</span>=<span style="color:#009900">"@+id/tv_show"</span>
                <span style="color:#4f4f4f">android:layout_width</span>=<span style="color:#009900">"match_parent"</span>
                <span style="color:#4f4f4f">android:layout_height</span>=<span style="color:#009900">"wrap_content"</span> /></span>

            <span style="color:#006666"><<span style="color:#4f4f4f">TextView
</span>                <span style="color:#4f4f4f">android:id</span>=<span style="color:#009900">"@+id/tv_show_service"</span>
                <span style="color:#4f4f4f">android:layout_width</span>=<span style="color:#009900">"match_parent"</span>
                <span style="color:#4f4f4f">android:layout_height</span>=<span style="color:#009900">"wrap_content"</span>
                <span style="color:#4f4f4f">android:gravity</span>=<span style="color:#009900">"right"</span> /></span>

            <span style="color:#006666"><<span style="color:#4f4f4f">ListView
</span>                <span style="color:#4f4f4f">android:id</span>=<span style="color:#009900">"@+id/lv"</span>
                <span style="color:#4f4f4f">android:layout_width</span>=<span style="color:#009900">"match_parent"</span>
                <span style="color:#4f4f4f">android:layout_height</span>=<span style="color:#009900">"200dp"</span> /></span>
        <span style="color:#006666"></<span style="color:#4f4f4f">LinearLayout</span>></span>
    <span style="color:#006666"></<span style="color:#4f4f4f">ScrollView</span>></span>
<span style="color:#006666"></<span style="color:#4f4f4f">LinearLayout</span>></span></code></span>

（三）可读写流的类

<span style="color:#000000"><code><span style="color:#000088">package</span> fuxi.bluetooth20;

<span style="color:#000088">import</span> android.bluetooth.BluetoothSocket;
<span style="color:#000088">import</span> android.util.Log;

<span style="color:#000088">import</span> java.io.InputStream;
<span style="color:#000088">import</span> java.io.OutputStream;

<span style="color:#880000">/**
 * 在子线程中进行读写操作
 */</span>
<span style="color:#000088">public</span> <span style="color:#000088">class</span> <span style="color:#4f4f4f">RWStream</span> <span style="color:#000088">extends</span> <span style="color:#4f4f4f">Thread</span> {

    InputStream is;<span style="color:#880000">//输入流</span>
    OutputStream os;<span style="color:#880000">//输出流</span>

    <span style="color:#880000">//蓝牙的Socket对象</span>
    <span style="color:#000088">private</span> <span style="color:#000088">final</span> BluetoothSocket socket;

    <span style="color:#880000">//通过构造方法传入Socket对象</span>
    <span style="color:#000088">public</span> <span style="color:#009900">RWStream</span>(BluetoothSocket socket) {
        <span style="color:#000088">this</span>.socket = socket;
    }

    <span style="color:#9b859d">@Override</span>
    <span style="color:#000088">public</span> <span style="color:#000088">void</span> <span style="color:#009900">run</span>() {
        <span style="color:#000088">super</span>.run();
        <span style="color:#000088">try</span> {
            is = socket.getInputStream();<span style="color:#880000">//获取Socket的输入流</span>
            os = socket.getOutputStream();<span style="color:#880000">//获取Socket的输出流</span>

            <span style="color:#000088">byte</span>[] buf = <span style="color:#000088">new</span> <span style="color:#000088">byte</span>[<span style="color:#006666">1024</span>];
            <span style="color:#000088">int</span> len = <span style="color:#006666">0</span>;
            Log.e(<span style="color:#009900">"TAG"</span>, <span style="color:#009900">"-----------开始读取----(is==null)   "</span> + (is == <span style="color:#000088">null</span>));
            <span style="color:#000088">while</span> (socket.isConnected()) {<span style="color:#880000">//当Socket是连接状态时，就一直进行数据的读取</span>
                <span style="color:#000088">while</span> ((len = is.read(buf)) != -<span style="color:#006666">1</span>) {
                    String message = <span style="color:#000088">new</span> String(buf, <span style="color:#006666">0</span>, len);
                    <span style="color:#880000">//获取流里面的数据</span>
                    Log.e(<span style="color:#009900">"TAG"</span>, <span style="color:#009900">"----------"</span> + message);
                    <span style="color:#880000">//如果在另一端设置的接口对象，那么就传递数据</span>
                    <span style="color:#000088">if</span> (dateShow != <span style="color:#000088">null</span>) {
                        dateShow.getMessager(message);
                    }
                }
            }
        } <span style="color:#000088">catch</span> (Exception e) {
            Log.e(<span style="color:#009900">"TAG"</span>, <span style="color:#009900">"-----------线程异常"</span>);
        }
    }

    <span style="color:#880000">/**
     * 数据的写入
     */</span>
    <span style="color:#000088">public</span> <span style="color:#000088">void</span> <span style="color:#009900">write</span>(String msg) {
        Log.e(<span style="color:#009900">"TAG"</span>, <span style="color:#009900">"--------os!=null   "</span> + (os != <span style="color:#000088">null</span>));
        <span style="color:#000088">if</span> (os != <span style="color:#000088">null</span>) {
            <span style="color:#000088">try</span> {
                <span style="color:#880000">//Socket数据的写入</span>
                os.write(msg.getBytes());
                <span style="color:#880000">//刷新输出流数据</span>
                os.flush();
            } <span style="color:#000088">catch</span> (Exception e) {
                Log.e(<span style="color:#009900">"TAG"</span>, <span style="color:#009900">"---写入--------异常"</span> + e.getMessage());
            }
        }
    }

    <span style="color:#880000">/**
     * 定义接口实现数据回调
     */</span>
    interface DataShow {
        <span style="color:#880000">//返回数据，读取到的字符串，传递过去</span>
        <span style="color:#000088">void</span> getMessager(String message);

    }

    <span style="color:#880000">//定义接口对象</span>
    DataShow dateShow;

    <span style="color:#880000">//接口的对象的设置方法</span>
    <span style="color:#000088">public</span> <span style="color:#000088">void</span> <span style="color:#009900">setDataShow</span>(DataShow dateShow) {
        <span style="color:#000088">this</span>.dateShow = dateShow;
    }
}</code></span>

（四）蓝牙服务器端(Socket服务端)的设计

<span style="color:#000000"><code><span style="color:#000088">package</span> fuxi.bluetooth20;

<span style="color:#000088">import</span> android.bluetooth.BluetoothAdapter;
<span style="color:#000088">import</span> android.bluetooth.BluetoothServerSocket;
<span style="color:#000088">import</span> android.bluetooth.BluetoothSocket;
<span style="color:#000088">import</span> android.util.Log;

<span style="color:#000088">import</span> java.io.IOException;

<span style="color:#880000">/**
 * 蓝牙设置的服务器端
 */</span>

<span style="color:#000088">public</span> <span style="color:#000088">class</span> <span style="color:#4f4f4f">BlueServer</span> <span style="color:#000088">extends</span> <span style="color:#4f4f4f">Thread</span> {
    <span style="color:#880000">//可读写数据的对象</span>
    RWStream rwStream;

    <span style="color:#000088">public</span> RWStream <span style="color:#009900">getRwStream</span>() {
        <span style="color:#000088">return</span> rwStream;
    }

    <span style="color:#880000">//蓝牙设备管理器</span>
    <span style="color:#000088">private</span> <span style="color:#000088">final</span> BluetoothAdapter adapter;

    <span style="color:#880000">//通过构造方法传入设置管理器</span>
    <span style="color:#000088">public</span> <span style="color:#009900">BlueServer</span>(BluetoothAdapter adapter) {
        <span style="color:#000088">this</span>.adapter = adapter;
    }

    <span style="color:#880000">//线程内的任务</span>
    <span style="color:#9b859d">@Override</span>
    <span style="color:#000088">public</span> <span style="color:#000088">void</span> <span style="color:#009900">run</span>() {
        <span style="color:#000088">super</span>.run();
        <span style="color:#000088">try</span> {
            <span style="color:#880000">//创建蓝牙服务端的Socket，这里第一个参数是服务器的名称，第二个参数是UUID的字符串的值</span>
            BluetoothServerSocket socket = adapter.listenUsingRfcommWithServiceRecord(<span style="color:#009900">"server"</span>, MainActivity.uuid);
            Log.e(<span style="color:#009900">"TAG"</span>, <span style="color:#009900">"--------------->>开始监听客户端连接"</span>);
            <span style="color:#880000">//获取蓝牙客户端对象，这是一个同步方法，用客户端接入才有后面的操作</span>
            BluetoothSocket client = socket.accept();
            Log.e(<span style="color:#009900">"TAG"</span>, <span style="color:#009900">"--------------->>有客户端接入"</span>);
            <span style="color:#880000">//获取可读可写对象</span>
            rwStream = <span style="color:#000088">new</span> RWStream(client);
            <span style="color:#880000">//开始可读可写线程的操作，这里是一直在读取数据的状态</span>
            rwStream.start();
        } <span style="color:#000088">catch</span> (IOException e) {
            e.printStackTrace();
        }

    }
}</code></span>

（五）主方法类的设计

<span style="color:#000000"><code><span style="color:#000088">package</span> fuxi.bluetooth20;

<span style="color:#000088">import</span> android.Manifest;
<span style="color:#000088">import</span> android.bluetooth.BluetoothAdapter;
<span style="color:#000088">import</span> android.bluetooth.BluetoothDevice;
<span style="color:#000088">import</span> android.bluetooth.BluetoothSocket;
<span style="color:#000088">import</span> android.content.BroadcastReceiver;
<span style="color:#000088">import</span> android.content.Context;
<span style="color:#000088">import</span> android.content.Intent;
<span style="color:#000088">import</span> android.content.IntentFilter;
<span style="color:#000088">import</span> android.content.pm.PackageManager;
<span style="color:#000088">import</span> android.graphics.Color;
<span style="color:#000088">import</span> android.os.Build;
<span style="color:#000088">import</span> android.os.Bundle;
<span style="color:#000088">import</span> android.os.Handler;
<span style="color:#000088">import</span> android.os.Message;
<span style="color:#000088">import</span> android.support.annotation.NonNull;
<span style="color:#000088">import</span> android.support.v7.app.AppCompatActivity;
<span style="color:#000088">import</span> android.text.TextUtils;
<span style="color:#000088">import</span> android.util.Log;
<span style="color:#000088">import</span> android.view.View;
<span style="color:#000088">import</span> android.widget.AdapterView;
<span style="color:#000088">import</span> android.widget.ArrayAdapter;
<span style="color:#000088">import</span> android.widget.Button;
<span style="color:#000088">import</span> android.widget.EditText;
<span style="color:#000088">import</span> android.widget.ListView;
<span style="color:#000088">import</span> android.widget.TextView;
<span style="color:#000088">import</span> android.widget.Toast;

<span style="color:#000088">import</span> java.io.IOException;
<span style="color:#000088">import</span> java.util.ArrayList;
<span style="color:#000088">import</span> java.util.List;
<span style="color:#000088">import</span> java.util.UUID;

<span style="color:#000088">import</span> <span style="color:#000088">static</span> android.util.Log.e;

<span style="color:#880000">/**
 * 蓝牙的使用示例
 */</span>
<span style="color:#000088">public</span> <span style="color:#000088">class</span> <span style="color:#4f4f4f">MainActivity</span> <span style="color:#000088">extends</span> <span style="color:#4f4f4f">AppCompatActivity</span> {

    <span style="color:#880000">//控制蓝牙设备的对象</span>
    BluetoothAdapter bluetoothAdapter;
    <span style="color:#880000">//布局内的ListView控件</span>
    ListView listView;
    TextView tv_show;
    TextView tv_show_service;
    EditText et_send;
    Button btn_send;
    ArrayAdapter adapter;<span style="color:#880000">//适配器对象的定义</span>
    <span style="color:#880000">//蓝牙设备的对象的集合</span>
    ArrayList<BluetoothDevice> devices = <span style="color:#000088">new</span> ArrayList<>();
    <span style="color:#880000">//设备的名称集合</span>
    ArrayList<String> deviceNames = <span style="color:#000088">new</span> ArrayList<>();
    <span style="color:#880000">//手机蓝牙的UUID固定值</span>
    <span style="color:#000088">public</span> <span style="color:#000088">static</span> <span style="color:#000088">final</span> UUID uuid = UUID.fromString(<span style="color:#009900">"00001101-0000-1000-8000-00805F9B34FB"</span>);
    <span style="color:#000088">private</span> <span style="color:#000088">static</span> <span style="color:#000088">final</span> <span style="color:#000088">int</span> REQUEST_LOCATION = <span style="color:#006666">1000</span>;<span style="color:#880000">//手机动态请求权限的请求码</span>
    <span style="color:#000088">private</span> <span style="color:#000088">static</span> <span style="color:#000088">final</span> <span style="color:#000088">int</span> REQUEST_ENABLE = <span style="color:#006666">1001</span>;<span style="color:#880000">//启动蓝牙设备的请求码</span>
    <span style="color:#000088">private</span> <span style="color:#000088">static</span> <span style="color:#000088">final</span> <span style="color:#000088">int</span> REQUEST_DISCOVER_MYSELF = <span style="color:#006666">1002</span>;<span style="color:#880000">//设置自身蓝牙设备可被发现的请求码</span>

    <span style="color:#9b859d">@Override</span>
    <span style="color:#000088">protected</span> <span style="color:#000088">void</span> <span style="color:#009900">onCreate</span>(Bundle savedInstanceState) {
        <span style="color:#000088">super</span>.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        <span style="color:#880000">//实例化</span>
        bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
        listView = (ListView) findViewById(R.id.lv);
        tv_show = (TextView) findViewById(R.id.tv_show);
        tv_show_service = (TextView) findViewById(R.id.tv_show_service);
        et_send = (EditText) findViewById(R.id.et_send);
        btn_send = (Button) findViewById(R.id.btn_send);
        <span style="color:#880000">//创建适配器,使用系统布局</span>
        adapter = <span style="color:#000088">new</span> ArrayAdapter(<span style="color:#000088">this</span>, android.R.layout.simple_list_item_1, deviceNames);
        <span style="color:#880000">//给ListView设置适配器</span>
        listView.setAdapter(adapter);
        <span style="color:#880000">//判断是否有了权限</span>
        checkPermission();
        <span style="color:#880000">//给ListView设置点击事件，点击对应的条目就创建对应的客户端，并经行数据的读取和写入</span>
        listView.setOnItemClickListener(<span style="color:#000088">new</span> AdapterView.OnItemClickListener() {
            <span style="color:#9b859d">@Override</span>
            <span style="color:#000088">public</span> <span style="color:#000088">void</span> <span style="color:#009900">onItemClick</span>(AdapterView<?> parent, View view, <span style="color:#000088">int</span> position, <span style="color:#000088">long</span> id) {
                <span style="color:#880000">//连接服务器</span>
                connServer(devices.get(position));
            }
        });


    }

    <span style="color:#880000">/**
     * 打开蓝牙设备
     */</span>
    <span style="color:#000088">public</span> <span style="color:#000088">void</span> <span style="color:#009900">open</span>(View view) {
        <span style="color:#880000">//不推荐</span>
        <span style="color:#880000">//bluetoothAdapter.enable();</span>
        <span style="color:#880000">//推荐</span>
        startActivityForResult(<span style="color:#000088">new</span> Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE), REQUEST_ENABLE);
    }

    <span style="color:#880000">/**
     * 关闭蓝牙设备
     */</span>
    <span style="color:#000088">public</span> <span style="color:#000088">void</span> <span style="color:#009900">close</span>(View view) {
        bluetoothAdapter.disable();<span style="color:#880000">//关闭</span>
        <span style="color:#880000">//擦除页面数据</span>
        deviceNames.clear();
        adapter.notifyDataSetChanged();
    }

    <span style="color:#880000">/**
     * 扫描蓝牙设备
     */</span>
    <span style="color:#000088">public</span> <span style="color:#000088">void</span> <span style="color:#009900">scan</span>(View view) {

        <span style="color:#000088">if</span> (bluetoothAdapter.isEnabled()) {
            <span style="color:#880000">//先清除页面数据！</span>
            devices.clear();
            deviceNames.clear();

            <span style="color:#880000">//使用广播的方法去获取设备，这里就要动态创建广播，并进行接听了</span>
            <span style="color:#880000">//定义一个系统规定action的广播，</span>
            <span style="color:#880000">//当系统没扫描到一个蓝牙设备就会发送一条广播</span>
            <span style="color:#880000">// 当系统做完扫描后，系统会发送广播，你只需在广播接收者做好处理</span>
            bluetoothAdapter.startDiscovery();
        } <span style="color:#000088">else</span> {
            Toast.makeText(<span style="color:#000088">this</span>, <span style="color:#009900">"请先开启蓝牙"</span>, Toast.LENGTH_SHORT).show();
        }
    }

    <span style="color:#880000">/**
     * 让自身蓝牙设备可被发现
     */</span>
    <span style="color:#000088">public</span> <span style="color:#000088">void</span> <span style="color:#009900">found</span>(View view) {
        getMyBondedDevices();
        <span style="color:#000088">if</span> (bluetoothAdapter.isDiscovering()) {<span style="color:#880000">//如果蓝牙设置正在扫描</span>
            Toast.makeText(<span style="color:#000088">this</span>, <span style="color:#009900">"正在扫描，别急"</span>, Toast.LENGTH_SHORT).show();
        } <span style="color:#000088">else</span> {
            <span style="color:#880000">//这里可以设置显示自己蓝牙设备的时间，默认是300秒，也可以自定义单位是秒</span>
            Intent intent = <span style="color:#000088">new</span> Intent(BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE).putExtra(BluetoothAdapter.EXTRA_DISCOVERABLE_DURATION, <span style="color:#006666">600</span>);
            startActivityForResult(intent, REQUEST_DISCOVER_MYSELF);
        }
    }

    <span style="color:#880000">/**
     * 开启蓝牙服务的服务端
     */</span>
    <span style="color:#000088">boolean</span> isServer = <span style="color:#000088">false</span>;<span style="color:#880000">//默认是普通客户端</span>
    BlueServer server;<span style="color:#880000">//创建蓝牙服务器的对象，在服务器做相关操作</span>

    <span style="color:#000088">public</span> <span style="color:#000088">void</span> <span style="color:#009900">createServer</span>(View view) {
        server = <span style="color:#000088">new</span> BlueServer(bluetoothAdapter);
        server.start();
        isServer = <span style="color:#000088">true</span>;<span style="color:#880000">//设置为服务端</span>
    }

    <span style="color:#880000">/**
     * 发送数据
     */</span>
    <span style="color:#000088">public</span> <span style="color:#000088">void</span> <span style="color:#009900">send</span>(View view) {
        String et = et_send.getText().toString();<span style="color:#880000">//获取输入框的数据</span>
        <span style="color:#880000">//给另一端写入数据</span>
        write(et);
    }

    <span style="color:#880000">/**
     * 数据的传递
     */</span>
    <span style="color:#000088">public</span> <span style="color:#000088">void</span> <span style="color:#009900">write</span>(String msg) {
        <span style="color:#000088">if</span> (isServer) {<span style="color:#880000">//服务器的写数据</span>
            btn_send.setText(<span style="color:#009900">"服务器"</span>);
            handlerSendMessager(<span style="color:#006666">1</span>, msg);
            e(<span style="color:#009900">"TAG"</span>, <span style="color:#009900">"----------(server != null && server.getRwStream() != null)  "</span> + (server != <span style="color:#000088">null</span> && server.getRwStream() != <span style="color:#000088">null</span>));
            <span style="color:#000088">if</span> (server != <span style="color:#000088">null</span> && server.getRwStream() != <span style="color:#000088">null</span>) {
                server.getRwStream().write(msg);
            }
        } <span style="color:#000088">else</span> {<span style="color:#880000">//客户端的写数据</span>
            btn_send.setText(<span style="color:#009900">"客户端"</span>);
            handlerSendMessager(<span style="color:#006666">2</span>, msg);
            <span style="color:#000088">if</span> (client != <span style="color:#000088">null</span>) {
                client.write(msg);
            }
        }
    }

    <span style="color:#880000">/**
     * 监听数据的接收
     */</span>
    <span style="color:#000088">public</span> <span style="color:#000088">void</span> <span style="color:#009900">listen</span>(View view) {

        <span style="color:#880000">//服务器的监听数据</span>
        <span style="color:#000088">if</span> (server != <span style="color:#000088">null</span>) {
            server.getRwStream().setDataShow(<span style="color:#000088">new</span> RWStream.DataShow() {
                <span style="color:#9b859d">@Override</span>
                <span style="color:#000088">public</span> <span style="color:#000088">void</span> <span style="color:#009900">getMessager</span>(<span style="color:#000088">final</span> String message) {
                    <span style="color:#880000">//要在主线程中改变UI</span>
                    Log.e(<span style="color:#009900">"TAG"</span>, <span style="color:#009900">"-------listen---Service"</span> + message);
                    handlerSendMessager(<span style="color:#006666">2</span>, message);
                }
            });
            <span style="color:#880000">//客户端的监听数据</span>
        } <span style="color:#000088">else</span> <span style="color:#000088">if</span> (client != <span style="color:#000088">null</span>) {
            client.setDataShow(<span style="color:#000088">new</span> RWStream.DataShow() {
                <span style="color:#9b859d">@Override</span>
                <span style="color:#000088">public</span> <span style="color:#000088">void</span> <span style="color:#009900">getMessager</span>(<span style="color:#000088">final</span> String message) {
                    <span style="color:#880000">//要在主线程中改变UI</span>
                    e(<span style="color:#009900">"TAG"</span>, <span style="color:#009900">"-------listen---client"</span> + message);
                    handlerSendMessager(<span style="color:#006666">1</span>, message);
                }
            });
        }
    }

    <span style="color:#880000">/**
     * Handler包装类
     */</span>
    <span style="color:#000088">private</span> <span style="color:#000088">void</span> <span style="color:#009900">handlerSendMessager</span>(<span style="color:#000088">int</span> what, String messge) {
        Message msg = Message.obtain();
        msg.what = what;
        msg.obj = messge;
        handler.sendMessage(msg);
    }

    <span style="color:#880000">/**
     * 创建Handler对象用于线程间通信
     */</span>
    Handler handler = <span style="color:#000088">new</span> Handler() {
        <span style="color:#9b859d">@Override</span>
        <span style="color:#000088">public</span> <span style="color:#000088">void</span> <span style="color:#009900">handleMessage</span>(Message msg) {
            <span style="color:#000088">super</span>.handleMessage(msg);
            <span style="color:#880000">//显示数据在文本中</span>
            <span style="color:#000088">if</span> (msg.what == <span style="color:#006666">1</span>) {
                <span style="color:#880000">//服务器的数据在右边</span>
                tv_show_service.setTextColor(Color.RED);
                tv_show_service.setTextSize(<span style="color:#006666">20</span>);
                tv_show_service.append(msg.obj + <span style="color:#009900">"\n"</span>);
            } <span style="color:#000088">else</span> {
                <span style="color:#880000">//客户端的数据在左边</span>
                tv_show.setTextColor(Color.BLUE);
                tv_show.setTextSize(<span style="color:#006666">20</span>);
                tv_show.append(msg.obj + <span style="color:#009900">"\n"</span>);
            }

        }
    };


    <span style="color:#880000">/**
     * 客户端连接服务器
     */</span>
    RWStream client;

    <span style="color:#000088">private</span> <span style="color:#000088">void</span> <span style="color:#009900">connServer</span>(BluetoothDevice device) {
        <span style="color:#000088">try</span> {
            <span style="color:#880000">//创建蓝牙客户端的Socket对象，这里是类BluetoothSocket，服务端是BluetoothServerSocket</span>
            BluetoothSocket socket = device.createRfcommSocketToServiceRecord(uuid);
            socket.connect();<span style="color:#880000">//连接Socket</span>
            <span style="color:#880000">//创建可读写的客户对象，传入Socket对象</span>
            client = <span style="color:#000088">new</span> RWStream(socket);
            <span style="color:#880000">//开始客户端的线程</span>
            client.start();
        } <span style="color:#000088">catch</span> (IOException e) {
            e.printStackTrace();
        }

    }


    <span style="color:#880000">/**
     * 判断是否有蓝牙的权限，如果手机系统是6.0以上的就要动态创建权限
     */</span>
    <span style="color:#000088">private</span> <span style="color:#000088">void</span> <span style="color:#009900">checkPermission</span>() {
        <span style="color:#000088">if</span> (Build.VERSION.SDK_INT >= <span style="color:#006666">23</span>) {
            <span style="color:#880000">//23</span>
            <span style="color:#000088">int</span> check = checkSelfPermission(Manifest.permission.ACCESS_COARSE_LOCATION);
            <span style="color:#000088">if</span> (check != PackageManager.PERMISSION_GRANTED) {
                <span style="color:#880000">//请求权限</span>
                requestPermissions(<span style="color:#000088">new</span> String[]{Manifest.permission.ACCESS_COARSE_LOCATION}, REQUEST_LOCATION);
            }
        }
    }

    <span style="color:#880000">/**
     * 动态请求权限后，返回页面时的回调方法
     */</span>
    <span style="color:#9b859d">@Override</span>
    <span style="color:#000088">public</span> <span style="color:#000088">void</span> <span style="color:#009900">onRequestPermissionsResult</span>(<span style="color:#000088">int</span> requestCode, @NonNull String[] permissions, @NonNull <span style="color:#000088">int</span>[] grantResults) {
        <span style="color:#000088">super</span>.onRequestPermissionsResult(requestCode, permissions, grantResults);
        <span style="color:#000088">if</span> (requestCode == REQUEST_LOCATION && grantResults[<span style="color:#006666">0</span>] == PackageManager.PERMISSION_GRANTED) {
            Toast.makeText(<span style="color:#000088">this</span>, <span style="color:#009900">"权限已获取"</span>, Toast.LENGTH_SHORT).show();
        } <span style="color:#000088">else</span> {
            Toast.makeText(<span style="color:#000088">this</span>, <span style="color:#009900">"权限未获取"</span>, Toast.LENGTH_SHORT).show();
            finish();<span style="color:#880000">//关闭页面</span>
        }
    }

    <span style="color:#880000">/**
     * 数据回调方法
     */</span>
    <span style="color:#9b859d">@Override</span>
    <span style="color:#000088">protected</span> <span style="color:#000088">void</span> <span style="color:#009900">onActivityResult</span>(<span style="color:#000088">int</span> requestCode, <span style="color:#000088">int</span> resultCode, Intent data) {
        <span style="color:#000088">super</span>.onActivityResult(requestCode, resultCode, data);
        <span style="color:#000088">if</span> (requestCode == REQUEST_ENABLE) {
            <span style="color:#000088">if</span> (resultCode == RESULT_OK) {
                Toast.makeText(<span style="color:#000088">this</span>, <span style="color:#009900">"蓝牙已开启"</span>, Toast.LENGTH_SHORT).show();
                getMyBondedDevices();<span style="color:#880000">//获取绑定的蓝牙设备</span>
                adapter.notifyDataSetChanged();<span style="color:#880000">//刷新适配器</span>
            } <span style="color:#000088">else</span> {
                Toast.makeText(<span style="color:#000088">this</span>, <span style="color:#009900">"蓝牙未开启"</span>, Toast.LENGTH_SHORT).show();
            }
        } <span style="color:#000088">else</span> {

        }
    }

    <span style="color:#880000">/**
     * 获取已经绑定的蓝牙设置
     */</span>
    <span style="color:#000088">private</span> <span style="color:#000088">void</span> <span style="color:#009900">getMyBondedDevices</span>() {
        <span style="color:#880000">//获取所有已经绑定了的设备</span>
        deviceNames.clear();<span style="color:#880000">//清除设备名称的集合</span>
        devices.clear();<span style="color:#880000">//清除蓝牙设备对象的集合</span>
        <span style="color:#000088">if</span> (bluetoothAdapter.getBondedDevices() != <span style="color:#000088">null</span>) {<span style="color:#880000">//如果蓝牙适配器对象不为空时</span>
            <span style="color:#880000">//获取里面的数据的对象</span>
            List<BluetoothDevice> liset = <span style="color:#000088">new</span> ArrayList<>(bluetoothAdapter.getBondedDevices());
            devices.addAll(liset);
            <span style="color:#880000">//拿到适配器对象的名称数据</span>
            <span style="color:#000088">for</span> (BluetoothDevice device : liset) {
                deviceNames.add(device.getName());
            }
        }
    }

    <span style="color:#880000">/**
     * 广播的注册
     */</span>
    <span style="color:#9b859d">@Override</span>
    <span style="color:#000088">protected</span> <span style="color:#000088">void</span> <span style="color:#009900">onResume</span>() {
        <span style="color:#000088">super</span>.onResume();
        IntentFilter intentFilter = <span style="color:#000088">new</span> IntentFilter(BluetoothDevice.ACTION_FOUND);
        <span style="color:#880000">//添加蓝牙广播的Action</span>
        intentFilter.addAction(BluetoothAdapter.ACTION_DISCOVERY_FINISHED);
        registerReceiver(receiver, intentFilter);<span style="color:#880000">//注册广播接收者</span>
    }

    <span style="color:#880000">/**
     * 广播的停止
     */</span>
    <span style="color:#9b859d">@Override</span>
    <span style="color:#000088">protected</span> <span style="color:#000088">void</span> <span style="color:#009900">onPause</span>() {
        <span style="color:#000088">super</span>.onPause();
        unregisterReceiver(receiver);<span style="color:#880000">//取消广播</span>
    }

    <span style="color:#880000">/**
     * 广播接收者的创建
     */</span>
    <span style="color:#000088">private</span> BroadcastReceiver receiver = <span style="color:#000088">new</span> BroadcastReceiver() {
        <span style="color:#9b859d">@Override</span>
        <span style="color:#000088">public</span> <span style="color:#000088">void</span> <span style="color:#009900">onReceive</span>(Context context, Intent intent) {
            <span style="color:#880000">//获取设备的发送的广播</span>
            <span style="color:#000088">if</span> (intent.getAction().equals(BluetoothAdapter.ACTION_DISCOVERY_FINISHED)) {
                Toast.makeText(context, <span style="color:#009900">"蓝牙扫描完毕"</span>, Toast.LENGTH_SHORT).show();
            } <span style="color:#000088">else</span> {
                <span style="color:#880000">//获取蓝牙设置对象</span>
                BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
                <span style="color:#880000">//把对象和名称放到对应的集合中</span>
                devices.add(device);
                deviceNames.add(TextUtils.isEmpty(device.getName()) ? <span style="color:#009900">"未命名"</span> : device.getName());
                adapter.notifyDataSetChanged();
            }
        }
    };


}</code></span>

      上面程序运行后就可以完成蓝牙通信了，上面程序设计中显示多个按钮是为了蓝牙的使用示范，实际程序中，可以减少扫描按钮，比如程序运行就打开蓝牙，监听数据的按钮的方法也是可以嵌入到程序当中。
      本程序虽然可以进行简单通信，但是也是有一些bug的，比如没有按照上面的步骤操作，直接点击后面的按钮是会空指针的！逻辑处理没有完善。
      如果要传输文件，或其他数据都是可以的，那就要对输入流和输出流进行设置了。
      这里对Socket编程简单做几句介绍，其实Socket编程并不是很难理解。Socket编程一般需要一个服务端SocketServie和一个或多个客户端Socket，通过SocketService或Socket对象获取它的输入流实现对数据的读取，获取输出流实现对数据的写入。其中数据如果要一直读取就要写一个一直执行的子线程，让它一直在跑。
      而Tcp/Udp编程就要用到ip地址和端口号了。Socket编程可以结合Tcp使用网络。

Android无线蓝牙开发总结

Android无线蓝牙开发总结

一.蓝牙基础知识

（一）蓝牙的四层协议

（二）蓝牙的操作

（三）蓝牙权限

1. android.permission.BLUETOOTH:

2. android.permission.BLUETOOTH_ADMIN :

（四）BluetoothAdapter

（五）蓝牙的BluetoothAdapter .STATE 状态值 ， 即开关状态

（六）BluetoothAdapter SCAN_MOD状态值 ，即扫描状态

（七）打开/关闭蓝牙的两种方法：

1.直接调用函数enable()去打开蓝牙设备 ；

2.系统API去打开蓝牙设备，该方式会弹出一个对话框样式的Activity供用户选择是否打开蓝牙设备。

（八)关闭蓝牙，直接调用API 函数即disable()即可。

（九）扫描蓝牙设备

（十）蓝牙的广播

（十一）获取蓝牙的相关信息的方法

1.public String getName ()

2.public String getAddress ()

3.public boolean setName (String name)

4.public SetgetBondedDevices ()

5.public static boolean checkBluetoothAddress (String address)

6.public BluetoothDevice getRemoteDevice (String address)

二．蓝牙Socket通信

（一）UUID

下面是蓝牙Socket使用示例：

三．蓝牙Socket通信示例

（一）添加权限

（二）布局文件的设计

（三）可读写流的类

（四）蓝牙服务器端(Socket服务端)的设计

（五）主方法类的设计

相关推荐

（五）蓝牙的BluetoothAdapter .STATE 状态值，即开关状态

（六）BluetoothAdapter SCAN_MOD状态值，即扫描状态

1.直接调用函数enable()去打开蓝牙设备；