BlackBerry 蓝牙编程（三）

最新推荐文章于 2023-01-11 23:43:14 发布

转载最新推荐文章于 2023-01-11 23:43:14 发布 · 886 阅读

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#blackberry #编程 #service #buffer #string #byte

本文详细介绍了如何在蓝牙服务端启动并运行SPP、L2CAP及OBEX三种不同的服务，包括创建UUID、获取本地蓝牙设备、建立连接、读写数据等关键步骤。

作者: 俞伟

蓝牙服务器端

首先启动蓝牙服务

1 . 第一步获取 L o cal D e v ice:

LocalDevice device = LocalDevice. getLocalDevice ();

2 . 第二步设置搜索模式并设置搜索模式为全局模式：

device.setDiscoverable(DiscoveryAgent. GIAC );

3 . 启动蓝牙服务：

三种连接方式 S P P , L 2 CA P , OBEX ，根据条件启动不同服务。

public void startBluetoothService ( int uuid){

_uuid = uuid;

try {

// 获取本地蓝牙设备

LocalDevice device = LocalDevice. getLocalDevice ();

int mode = device.getDiscoverable();

if (mode != DiscoveryAgent. GIAC ){

// 设置搜索方式为全局方式，发现附近所有蓝牙设备

device.setDiscoverable(DiscoveryAgent. GIAC );

switch ( _uuid ){

case BluetoothJSR82Demo. SPP_UUID :

// 启动 SPP 服务， StreamConnectio n

SPPServerThread sppThread = new SPPServerThread();

sppThread.start();

break ;

case BluetoothJSR82Demo. OPP_UUID :

// 启动 OPP 服务， OBEX

OPPServerThread oppThread = new OPPServerThread();

oppThread.start();

break ;

case BluetoothJSR82Demo. L2CAP_UUID :

// 启动 L2 CA P 服务 , L2CAPConnectio nNotifier

L2CAPServerThread l2capThread = new L2CAPServerThread();

l2capThread.start();

break ;

}

catch (BluetoothStateException bse){

BluetoothJSR82Demo. errorDialog (bse.toString());

}

启用蓝牙 S PP 服务

蓝牙 SP P 服务基于 Str ea m Co nn ect i o n 。

1 . 首先创建服务唯一标识 U UID

UUID uuid = new UUID( _uuid );

2 . 获取本地蓝牙设备，启动服务

LocalDevice local = LocalDevice. getLocalDevice (); StreamConnectionNotifier service = (StreamConnectionNotifier) Connector. open ( "btspp://localhost:" + uuid + ";name=" + SERVICE_NAME_SPP );

connection = service.acceptAndOpen();

3 . 获取输入输出流与客户端进行读写

public void runSPPService(){

try {

StreamConnection connection = null ;

DataOutputStream os = null ; DataInputStream is = null ; try {

// 创建服务唯一标识 UUID

UUID uuid = new UUID( _uuid );

// 获取本地蓝牙设备

LocalDevice local = LocalDevice. getLocalDevice ();

// 创建 StreamCo nnectionNotifier

StreamConnectionNotifier service = (StreamConnectionNotifier) Connector.open ( "btspp://localhost:" + uuid + ";name=" +

SERVICE_NAME_SPP );

// 等待 St re am C on ne ct io n 客户端的链接

connection = service.acceptAndOpen();

// 获取输入流读取数据

is = connection.openDataInputStream();

byte [] buffer = new byte [1024];

int readBytes = is.read(buffer);

String receivedMessage = new String(buffer, 0, readBytes);

// 发送消息给客户端

String message = "/nJSR-82 SERVER says hello!" ; os = connection.openDataOutputStream(); os.write(message.getBytes());

os.flush();

}

finally {

os.close();

is.close();

}

catch (IOException ioe){

BluetoothJSR82Demo. errorDialog (ioe.toString());

}

启动蓝牙 L 2 C AP 服务

1 ．首先创建 UUID ，获取本地连接

UUID uuid = new UUID( _uuid );

LocalDevice local = LocalDevice. getLocalDevice ();

2 ．打开 L 2 CA P 连接，等待客户端连接

L2CAPConnectionNotifier service = (L2CAPConnectionNotifier) Connector. open ( "btl2cap://localhost:" + uuid + ";name=" + SERVICE_NAME_L2CAP );

connection = service.acceptAndOpen();

3 ．接收客户端消息

byte [] buffer = new byte [ 1024 ];

int readBytes = connection.receive(buffer);

String receivedMessage = new String(buffer, 0, readBytes);

4 ．向客户端发送数据

String message = "/nJSR-82 SERVER says hello!" ;

connection.send(message.getBytes());

public void runL2CAPService (){

try {

L2CAPConnection connection = null ;

try {

// 创建 UUID ，获取本地蓝牙设备

UUID uuid = new UUID( _uuid );

LocalDevice local = LocalDevice. getLocalDevice ();

// 打开 L2CAP 连接，等待客户端的链接

L2CAPConnectionNotifier service = (L2CAPConnectionNotifier) Connector. open ( "btl2cap://localhost:" + uuid + ";name=" +

SERVICE_NAME_L2CAP );

connection = service.acceptAndOpen();

// 创建缓存，读取数据

byte [] buffer = new byte [ 1024 ];

int readBytes = connection.receive(buffer);

String receivedMessage = new String(buffer, 0, readBytes);

// 向客户端发送数据

String message = "/nJSR-82 SERVER says hello!" ;

connection.send(message.getBytes());

}

finally {

connection.close();

}

catch (IOException ioe){

BluetoothJSR82Demo. errorDialog (ioe.toString());

}

启动蓝牙 OBE X 服务

1 ．首先创建蓝牙服务唯一标识 UUI D 并获取本地蓝牙设备

UUID uuid = new UUID( _uuid );

LocalDevice local = LocalDevice. getLocalDevice ();

2 ．打开 OBE X 连接

SessionNotifier sessionNotifier = (SessionNotifier) Connector. open ( "btgoep://localhost:" + uuid + ";name=" + SERVICE_NAME_OPP );

3 ．注册 OBE X 处理器来处理客户端请求

sessionNotifier.acceptAndOpen( new ObexServerRequestHandler());

public void run(){

try {

// 创建服务唯一标识 UUID ，获取本地蓝牙设备

UUID uuid = new UUID( _uuid );

LocalDevice local = LocalDevice. getLocalDevice ();

// 打开 OBEX 连接并等待客户端 OBEX 连接

SessionNotifier sessionNotifier = (SessionNotifier) Connector.open ( "btgoep://localhost:" + uuid + ";name=" + SERVICE_NAME_OPP );

// 注册 ObextServe rRequestHandler 来处理客户端请求

sessionNotifier.acceptAndOpen( new ObexServerRequestHandler());

}

catch (IOException ioe){

BluetoothJSR82Demo. errorDialog (ioe.toString());

}

4 . 实现 OBE X 处理器接口 S e rverR equ est H and ler 。 o n C o nn ect ( ) 在 OB EX 连接建立的时候被调用，是处理连接相关逻辑的地方。当客户端有数据通过 OBEX 连接输入服务端时， o n P u t() 被调用，读取数据并处理。同时通过 Operati o n 获取输出流向客户端发送数据。

class ObexServerRequestHandler extends ServerRequestHandler{

// 当与客户端连接上时，调用该函数

public int onConnect(HeaderSet request, HeaderSet reply){

updateStatus( "[SERVER] OPP session created" );

return ResponseCodes. OBEX_HTTP_OK ;

}

// 当接收数据和发送数据时调用该函数，从 Op er a ti on 获取 InputStream, OutputStream

public int onPut(Operation op){

try {

InputStream is = op.openInputStream();

// 读取数据

byte b[] = new byte [1024];