接着介绍微信硬件jsapi接口
首先看微信硬件jsapi接口介绍
上述就是微信硬件设备jsapi接口关于startScanWXDevice扫描设备介绍,接下来我们利用java+jsp代码实现,本代码基于springMVC框架内。
一)springMVC controller方法
/**** www.vxzsk.com原创 ****/ @RequestMapping(value="/wxlanya") public ModelAndView wxJsSdkConfig(HttpServletRequest request,HttpServletResponse response){ String url=null; if(StringUtils.isNotEmpty(request.getQueryString())){ url = request.getRequestURL()+"?"+request.getQueryString(); }else{ url = request.getRequestURL()+""; } System.out.println("请求地址"+url); //1,获取access_token AccessToken accessToken = WeixinUtil.getAccessToken(AppConst.APP_ID, AppConst.APPSECRET); String access_token=accessToken.getToken(); String ticket = WeixinUtil.getJsapiTicket(access_token); Map<String,String> map = WeixinUtil.sign(ticket, url); request.setAttribute("timestamp", map.get("timestamp")); request.setAttribute("nonceStr", map.get("nonceStr")); request.setAttribute("signature", map.get("signature")); request.setAttribute("appId", AppConst.APP_ID); return new ModelAndView("/weixin/nfc/wxlanya"); }
1,变量jsapiTicket的获取请参考https://www.vxzsk.com/298.html
2,WeixinUtil中的sign方法如下:
/***
* 获取界面调用jsapi的所需参数
* @param jsapi_ticket 凭据
* @param url 界面请求地址
* @return V型知识库 www.vxzsk.com
*/
public
static
Map<String, String> sign(String jsapi_ticket, String url) {
Map<String, String> ret =
new
HashMap<String, String>();
String nonce_str = create_nonce_str();
String timestamp = create_timestamp();
String string1;
String signature =
""
;
//注意这里参数名必须全部小写,且必须有序
string1 =
"jsapi_ticket="
+ jsapi_ticket +
"&noncestr="
+ nonce_str +
"×tamp="
+ timestamp +
"&url="
+ url;
System.out.println(string1);
try
{
MessageDigest crypt = MessageDigest.getInstance(
"SHA-1"
);
crypt.reset();
crypt.update(string1.getBytes(
"UTF-8"
));
signature = byteToHex(crypt.digest());
}
catch
(NoSuchAlgorithmException e)
{
e.printStackTrace();
}
catch
(UnsupportedEncodingException e)
{
e.printStackTrace();
}
ret.put(
"url"
, url);
ret.put(
"jsapi_ticket"
, jsapi_ticket);
ret.put(
"nonceStr"
, nonce_str);
ret.put(
"timestamp"
, timestamp);
ret.put(
"signature"
, signature);
return
ret;
}
private
static
String byteToHex(
final
byte
[] hash) {
Formatter formatter =
new
Formatter();
for
(
byte
b : hash)
{
formatter.format(
"%02x"
, b);
}
String result = formatter.toString();
formatter.close();
return
result;
}
private
static
String create_nonce_str() {
return
UUID.randomUUID().toString();
}
private
static
String create_timestamp() {
return
Long.toString(System.currentTimeMillis() /
1000
);
}
3, AppConst.APP_ID的值其实是一个固定值,替换为自己公众号中的appid即可。
二)新建wxlanya.jsp页面
1,在controller中返回界面为wxlanya.jsp 其实本界面就是H5界面,界面中有个扫描设备按钮,点击此按钮触发以下js代码
//点击获取设备按钮的函数 开始 $("#CallGetWXrefresh").on("click",function(e){ //1. 打开微信设备 my_openWXDeviceLib(); //2. 扫描设备 my_startScanWXDevice(); }); //点击获取设备按钮的函数 结束
1),my_openWXDeviceLib();打开微信设备函数库函数 已经在https://www.vxzsk.com/333.html 介绍,不清楚的读者可前往研读。
2),my_startScanWXDevice();方法就是实现扫描设备接口的方法,方法代码如下
/********************************************** * 扫描设备 * 作者:脚踩代码--V型知识库 2017-02-14 * my_getWXDeviceInfos * 入口参数:无 * 出口参数:返回一个已经链接的设备的ID **********************************************/ function my_startScanWXDevice(){ WeixinJSBridge.invoke('startScanWXDevice', {}, function(res){ mlog("扫描设备返回:"+res.err_msg); }); return; }
2,测试
在这里,本案例请求spring的controller方法路径为http://www.xxxx.com/wx/wxlanya.do 进入wxlanya.jsp页面,效果如下
上图弹出调用微信硬件jsapi成功标识,点击扫描设备按钮,效果如下
返回“ok”,证明我们已经成功调用startScanWXDevice接口
3,完整wxlanya.jsp代码
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%> <% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; session.setAttribute("basePath",basePath); %> <!DOCTYPE html> <html class="ie"><!--<![endif]--> <head> <meta charset="utf-8"> <title>微信蓝牙设备-V型知识库www.vxzsk.com</title> <meta name="viewport" content="width=320.1,initial-scale=1,minimum-scale=1,maximum-scale=1,user-scalable=no"> <link rel="stylesheet" href="<%=basePath %>/resource/device/weui.min.css?what=0"> <script src="http://libs.baidu.com/jquery/2.0.0/jquery.js"></script> <script src="http://res.wx.qq.com/open/js/jweixin-1.1.0.js"> </script> </head> <body ontouchstart> <!--标题行--> <h2 style="color: white;background-color: green;text-align: center;background-position: center;">蓝牙设备</h2> <div class="page"> <div class="bd spacing"> <div class="weui_cells weui_cells_form"> <div class="weui_cell"> <div class="weui_cell_hd"><label class="weui_label" style="width: auto;">当前设备: </label></div> <div class="weui_cell_bd weui_cell_primary"> <label id="lbdeviceid" class="weui_label" style="width: auto;"></label> </div> </div> <div class="weui_cell"> <div class="weui_cell_hd"><label class="weui_label" style="width: auto;">状态信息: </label></div> <div class="weui_cell_bd weui_cell_primary"> <label id="lbInfo" class="weui_label" style="width: auto;"></label> </div> </div> <div class="weui_cell" > <div class="weui_cell_hd"><label class="weui_label">日志: </label></div> <div class="weui_cell_bd weui_cell_primary"> <textarea id="logtext" class="weui_textarea" placeholder="日志" rows="5"></textarea> </div> </div> </div> <div class="weui_btn_area weui"> <button class="weui_btn weui_btn weui_btn_warn" id="CallGetWXrefresh">扫描设备</button><br> </div> </div> <div class="weui_dialog_alert" id="Mydialog" style="display: none;"> <div class="weui_mask"></div> <div class="weui_dialog"> <div class="weui_dialog_hd" id="dialogTitle"><strong class="weui_dialog_title">着急啦</strong></div> <div class="weui_dialog_bd" id="dialogContent">亲,使用本功能,请先打开手机蓝牙!</div> <div class="weui_dialog_ft"> <a href="#" class="weui_btn_dialog primary">确定</a> </div> </div> </div> <!--BEGIN toast--> <div id="toast" style="display: none;"> <div class="weui_mask_transparent"></div> <div class="weui_toast"> <i class="weui_icon_toast"></i> <p class="weui_toast_content" id="toast_msg">已完成</p> </div> </div> <!--end toast--> <!-- loading toast --> <div id="loadingToast" class="weui_loading_toast" style="display:none;"> <div class="weui_mask_transparent"></div> <div class="weui_toast"> <div class="weui_loading"> <div class="weui_loading_leaf weui_loading_leaf_0"></div> <div class="weui_loading_leaf weui_loading_leaf_1"></div> <div class="weui_loading_leaf weui_loading_leaf_2"></div> <div class="weui_loading_leaf weui_loading_leaf_3"></div> <div class="weui_loading_leaf weui_loading_leaf_4"></div> <div class="weui_loading_leaf weui_loading_leaf_5"></div> <div class="weui_loading_leaf weui_loading_leaf_6"></div> <div class="weui_loading_leaf weui_loading_leaf_7"></div> <div class="weui_loading_leaf weui_loading_leaf_8"></div> <div class="weui_loading_leaf weui_loading_leaf_9"></div> <div class="weui_loading_leaf weui_loading_leaf_10"></div> <div class="weui_loading_leaf weui_loading_leaf_11"></div> </div> <p class="weui_toast_content" id="loading_toast_msg">数据加载中</p> </div> </div> <!-- End loading toast --> <!--BEGIN dialog1--> <div class="weui_dialog_confirm" id="dialog1" style="display: none;"> <div class="weui_mask"></div> <div class="weui_dialog"> <div class="weui_dialog_hd"><strong class="weui_dialog_title">弹窗标题</strong></div> <div class="weui_dialog_bd">自定义弹窗内容,居左对齐显示,告知需要确认的信息等</div> <div class="weui_dialog_ft"> <a href="javascript:;" class="weui_btn_dialog default" id="qxBtn">取消</a> <a href="javascript:;" class="weui_btn_dialog primary" id="okBtn">确定</a> </div> </div> </div> <!--END dialog1--> <!--BEGIN dialog2--> <div class="weui_dialog_alert" id="dialog2" style="display: none;"> <div class="weui_mask"></div> <div class="weui_dialog"> <div class="weui_dialog_hd"><strong class="weui_dialog_title">弹窗标题</strong></div> <div class="weui_dialog_bd">弹窗内容,告知当前页面信息等</div> <div class="weui_dialog_ft"> <a href="javascript:;" class="weui_btn_dialog primary">确定</a> </div> </div> </div> <!--END dialog2--> </div> <div id="myparams" style="display: none"> <span id="timestamp">${timestamp }</span> <span id="nonceStr">${nonceStr }</span> <span id="signature">${signature }</span> <span id="appId">${appId }</span> </div> </body> <script type="text/javascript"> jQuery(document).ready(function(){ //初始化库 loadXMLDoc(); //初始化库结束 //点击获取设备按钮的函数 开始 $("#CallGetWXrefresh").on("click",function(e){ //1. 打开微信设备 my_openWXDeviceLib(); //2. 扫描设备 my_startScanWXDevice(); }); //点击获取设备按钮的函数 结束 }); //初始化 微信硬件jsapi库 function loadXMLDoc() { var appId =jQuery("#appId").text(); var timestamp=jQuery("#timestamp").text(); var nonceStr =jQuery("#nonceStr").text(); var signature=jQuery("#signature").text(); wx.config({ beta: true, debug: true,// 开启调试模式,调用的所有api的返回值会在客户端alert出来,若要查看传入的参数,可以在pc端打开,参数信息会通过log打出,仅在pc端时才会打印。 appId: appId, timestamp: timestamp, nonceStr: nonceStr, signature: signature, jsApiList: [ 'openWXDeviceLib', 'closeWXDeviceLib', 'getWXDeviceInfos', 'getWXDeviceBindTicket', 'getWXDeviceUnbindTicket', 'startScanWXDevice', 'stopScanWXDevice', 'connectWXDevice', 'disconnectWXDevice', 'sendDataToWXDevice', 'onWXDeviceBindStateChange', 'onWXDeviceStateChange', 'onScanWXDeviceResult', 'onReceiveDataFromWXDevice', 'onWXDeviceBluetoothStateChange', ] }); alert("初始化库结束"); } //判断调用jsapi返回状态 true表示成功 wx.error(function (res) { alert("调用微信jsapi返回的状态:"+res.errMsg); }); /******************************分割线************************************************/ /********************************************************* * 打开微信设备 * 作者:wxh 2016-04-04 * my_openWXDeviceLib * 入口参数:无 * 出口参数:0表示打开成功;1表示打开失败 *********************************************************/ function my_openWXDeviceLib(){ var x=0; WeixinJSBridge.invoke('openWXDeviceLib', {}, function(res){ mlog("打开设备返回:"+res.err_msg); if(res.err_msg=='openWXDeviceLib:ok') { if(res.bluetoothState=='off') { showdialog("太着急啦","亲,使用前请先打开手机蓝牙!"); $("#lbInfo").innerHTML="1.请打开手机蓝牙"; $("#lbInfo").css({color:"red"}); x=1; isOver(); }; if(res.bluetoothState=='unauthorized') { showdialog("出错啦","亲,请授权微信蓝牙功能并打开蓝牙!"); $("#lbInfo").html("1.请授权蓝牙功能"); $("#lbInfo").css({color:"red"}); x=1; isOver(); }; if(res.bluetoothState=='on') { //showdialog("太着急啦","亲,请查看您的设备是否打开!"); $("#lbInfo").html("1.蓝牙已打开"); $("#lbInfo").css({color:"red"}); //$("#lbInfo").attr(("style", "background-color:#000"); x=0; //isOver(); }; } else { $("#lbInfo").html("1.微信蓝牙打开失败"); x=1; showdialog("微信蓝牙状态","亲,请授权微信蓝牙功能并打开蓝牙!"); } }); return x; //0表示成功 1表示失败 } /********************************************** * 扫描设备 * 作者:2017-02-14 * my_getWXDeviceInfos * 入口参数:无 * 出口参数:返回一个已经链接的设备的ID **********************************************/ function my_startScanWXDevice(){ WeixinJSBridge.invoke('startScanWXDevice', {}, function(res){ mlog("扫描设备返回:"+res.err_msg); }); return; } //打印日志 function mlog(m){ var log=$('#logtext').val(); //log=log+m; log = m; $('#logtext').val(log); } /*************************************************************** * 显示提示信息 ***************************************************************/ function showdialog(DialogTitle,DialogContent){ var $dialog = $("#Mydialog"); $dialog.find("#dialogTitle").html(DialogTitle); $dialog.find("#dialogContent").html(DialogContent); $dialog.show(); $dialog.find(".weui_btn_dialog").one("click", function(){ $dialog.hide(); }); } </script> </html>
----------只要把上述controller中的方法和jsp页面的代码复制到工程目录下,即可正常运行,案例经过本作者测试并成功运行
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