www/js/scan.js

var app = {

    // Application Constructor
    initialize: function() {
        document.addEventListener('deviceready', this.onDeviceReady.bind(this), false);
    },

    onDeviceReady: function() {
        console.log(2);
        if (typeof(QRScanner) != 'undefined') {
            //初始化检测，申请摄像头等权限
            console.log(1);
            QRScanner.destroy();
            QRScanner.prepare(onDone); // show the prompt
        } else {
            $.alert('插件加载失败');
        }
        //showRet("http://ykt.supwisdom.com:9116/epay/wxpage/index")
        function onDone(err, status) {
            if (err) {
                console.log(err);
                $.alert('启动扫描出错：' + JSON.stringify(err), '提示');
            }
            if (status.authorized) {
                //绑定扫描监听
                // `QRScanner.cancelScan()` is called.
                QRScanner.scan(displayContents);

                function displayContents(err, text) {
                    if (err) {
                        // an error occurred, or the scan was canceled (error code `6`)
                        $.alert('扫描出错，请稍后再试：' + JSON.stringify(err), '提示');
                    } else {
                        // The scan completed, display the contents of the QR code:
                        //$.alert(text, '提示');
                        showRet(text);
                        QRScanner.destroy();
                    }
                }
                //开始扫描，需要将页面的背景设置成透明
                QRScanner.show();
                console.log("QRScanner.scan");
            } else if (status.denied) {
                // The video preview will remain black, and scanning is disabled. We can
                // try to ask the user to change their mind, but we'll have to send them
                // to their device settings with `QRScanner.openSettings()`.
                $.alert('无法请求道相机权限，请在设置中开启', '提示');
            } else {
                // we didn't get permission, but we didn't get permanently denied. (On
                // Android, a denial isn't permanent unless the user checks the "Don't
                // ask again" box.) We can ask again at the next relevant opportunity.
                $.alert('无法请求道相机权限，请在设置中开启', '提示');
            }
        }
        this.receivedEvent()
    },
    receivedEvent: function() {
        var light = false;
        $('#lightBtn').click(function() {
            if (light) {
                QRScanner.enableLight();
            } else {
                QRScanner.disableLight();
            }
            light = !light;
        });
    },
    goPage: function() {
        QRScanner.destroy();
        window.location = "main.html"
    }
};
app.initialize();
var inAppBrowserRef;
function showRet(url) {
    if(isEmpty(url)){
        return;
    }
    var userid = window.localStorage.getItem("userid"); 
    if(url.indexOf("?")>0){
        url=url+'&uid='+userid;
    }else{
        url=url+'?uid='+userid;
    }
    inAppBrowserRef = cordova.ThemeableBrowser.open(url, '_blank', {
        statusbar: {
            color: '#03a9f4ff'
        },
        toolbar: {
            height: 44,
            color: '#03a9f4ff'
        },
        title: {
            color: '#ffffffff',
            showPageTitle: true
        },
        backButton: {
            image: 'back.png',
            imagePressed: 'back.png',
            align: 'left',
            event: 'backPressed'
        },
        closeButton: {
            image: 'close.png',
            imagePressed: 'close.png',
            align: 'left',
            event: 'closePressed'
        },
        backButtonCanClose: true
    }).addEventListener('backPressed', function(e) {
        //alert('back pressed');
    }).addEventListener('closePressed', function(e) {
        //alert('closePressed pressed');
        inAppBrowserRef.close();
        window.location = "main.html"
    }).addEventListener(cordova.ThemeableBrowser.EVT_ERR, function(e) {
        console.error(e.message);
    }).addEventListener(cordova.ThemeableBrowser.EVT_WRN, function(e) {
        console.log(e.message);
    });
    inAppBrowserRef.addEventListener('loadstart', loadStartCallBack);
    inAppBrowserRef.addEventListener('beforeload', beforeloadCallBack);
}
function loadStartCallBack(params,callback) {
    console.log("1",params.url);
}
function beforeloadCallBack(params,callback) {
    console.log("2",params.url);
}