var ga = require('path/to/ga.js');
var GoogleAnalytics = ga.GoogleAnalytics;
App({
    // ...
    tracker: null,
    getTracker: function () {
        if (!this.tracker) {
            // 初始化GoogleAnalytics Tracker
            this.tracker = GoogleAnalytics.getInstance(this)
                            .setAppName('小程序名称')
                            .setAppVersion('小程序版本号')
                            .newTracker('UA-XXXXXX-X'); //用你的 Tracking ID 代替
           
            //使用自己的合法域名做跟踪数据转发
            this.tracker.setTrackerServer("https://ga-proxy.example.com"); 
        }
        return this.tracker;
    },
    // ...
})

var ga = require('path/to/ga.js');
var HitBuilders = ga.HitBuilders;
Page({
    // ...

    // 一般在onShow()里处理ScreenView
    onShow: function(){
        // 获取那个Tracker实例
        var t = getApp().getTracker();
        t.setScreenName('这是我的首屏页');
        t.send(new HitBuilders.ScreenViewBuilder().build());
    },
    // ...
})

var ga = require('path/to/ga.js');
var GoogleAnalytics = ga.GoogleAnalytics;

var app = getApp(); //获取微信小程序的App实例

// 初始化GoogleAnalytics
var gaInstance = GoogleAnalytics.getInstance(app);
gaInstance.setAppName('小程序名称'); // 设置APP名称
gaInstance.setAppVersion('小程序版本号'); //设置APP版本号，[可选]

// 创建一个跟踪器 Tracker
var tracker = gaInstance.newTracker('UA-XXXXXX-X'); // 参数是谷歌统计媒体资源中的 跟踪ID (Tracking ID)

//使用自己的合法域名做跟踪数据转发
tracker.setTrackerServer("https://ga-proxy.example.com"); 

// app.js
var ga = require('path/to/ga.js');
var GoogleAnalytics = ga.GoogleAnalytics;
App({
    // ...
    tracker: null,
    getTracker: function () {
        if (!this.tracker) {
            // 初始化GoogleAnalytics Tracker
            this.tracker = GoogleAnalytics.getInstance(this)
                            .setAppName('小程序名称')
                            .setAppVersion('小程序版本号')
                            .newTracker('UA-XXXXXX-X'); 

            //使用自己的合法域名做跟踪数据转发
            this.tracker.setTrackerServer("https://ga-proxy.example.com")
        }
        return this.tracker;
    },
    // ...
})

// /pages/index/index.js

Page({
    // ...
    onShow: function(){

        // 获取全局跟踪器
        var t = getApp().getTracker();

        // 后续的所有匹配数据都会使用这个屏幕名称。
        t.setScreenName('这是首页');

        // t.send(Hit) 上报数据
    },
    // ...
})

var ga = require('path/to/ga.js');
var HitBuilders = ga.HitBuilders;
Page({
    // ...

    // 一般在onShow()里处理ScreenView
    onShow: function(){
        // 获取那个Tracker实例
        var t = getApp().getTracker();
        t.setScreenName('当前屏幕名称'); 
        t.send(new HitBuilders.ScreenViewBuilder().build());
    },
    // ...
})

t.send(new HitBuilders.ScreenViewBuilder()
    .setCustomDimension(1,"维度1")
    .setCustomDimension(2,"维度2")
    .setCustomMetric(1,100.35)
    .setCustomMetric(2,200).build());

t.send(new HitBuilders.EventBuilder()
    .setCategory('视频')
    .setAction('点击')
    .setLabel('播放') // 可选
    .setValue(1).build()); // 可选

t.send(new HitBuilders.ExceptionBuilder()
    .setDescription('异常描述信息')  
    .setFatal(false).build()); // 可选，是否严重错误，默认为 true

t.send(new HitBuilders.TimingBuilder()
    .setCategory('计时器')
    .setValue(63000)
    .setVariable('用户注册')
    .setLabel('表单').build());

// Start a new session with the hit.
t.send(new HitBuilders.ScreenViewBuilder()
    .setNewSession()
    .build());

  // You only need to set User ID on a tracker once. By setting it on the
  // tracker, the ID will be sent with all subsequent hits.
  t.set("&uid", '12345');

  // This hit will be sent with the User ID value and be visible in
  // User-ID-enabled views (profiles).
  t.send(new HitBuilders.EventBuilder()
      .setCategory("UX")
      .setAction("User Sign In")
      .build());

// Set screen name.
t.setScreenName(screenName);

// In this example, campaign information is set using
// a url string with Google Analytics campaign parameters.
// Note: 这只是示例，网址 ? 前面部分其实没有用处，主要是utm_XXXXX系列参数的解析
//
var campaignUrl = "http://example.com/index.html?" +
    "utm_source=email&utm_medium=email_marketing&utm_campaign=summer" +
    "&utm_content=email_variation_1";

// Campaign data sent with this hit.
t.send(new HitBuilders.ScreenViewBuilder()
    .setCampaignParamsFromUrl(campaignUrl)
    .build()
);

t.setScreenName(screenName);
var campaignUrl = "http://example.com/index.html?" +
    "utm_source=email&utm_medium=email_marketing&utm_campaign=summer" +
    "&utm_content=email_variation_1";
t.setCampaignParamsOnNextHit(campaignUrl); // 下一个发送的匹配会带上这些参数

t.send(new HitBuilders.ScreenViewBuilder().build());

// app.js
var ga = require('path/to/ga.js');
var CampaignParams = ga.CampaignParams;

App({
    //...
    onLaunch: function(options) {
        if (options && options.scene) {
            var campaignUrl = CampaignParams.buildFromWeappScene(options.scene).toUrl();
            var t = getApp().getTracker();
            t.setCampaignParamsOnNextHit(campaignUrl);

            // 下一个发送的匹配就会带上微信场景信息
            // t.send(Hit) 
        }
    },
    //...
})

{"path": "pages/index/index?utm_source=Coffee%20Bar&utm_medium=qrcode", "width": 430}

// path 一般是你小程序的入口页，也可以是 App 上注册过的 pages 中的一个

// pages/index/index.js
var ga = require('path/to/ga.js');
var CampaignParams = ga.CampaignParams;

Page({
    //...
    onLoad: function(options) {
        var t = getApp().getTracker();
        // 解析options中的 utm_xxxxxx 参数，生成一个广告连接 URL
        var campaignUrl = CampaignParams.parseFromPageOptions(options).toUrl();
        t.setCampaignParamsOnNextHit(campaignUrl);

        // 下一个发送的匹配就会带上广告来源信息
        // t.send(Hit) 
    },
    //...
})

{"path" : "pages/index/index?var1=Coffee%20Bar&var2=Scan%20Qrcode", "width": 430}


// 扫码进入小程序后 
Page({
    onLoad: funciton(options) {
        // 此时 options 是这样的 
        // { "var1" : "Coffee Bar", "var2" : "Scan Qrcode" }
        // 需要指定和 utm_xxx 的映射关系
        var map = {
            "var1" : "utm_source", // 把 var1 对应到  utm_source
            "var2" : "utm_medium"
        };

        var campaignUrl = CampaignParams.parseFromPageOptions(options, map).toUrl();
        var t = getApp().getTracker();
        t.setCampaignParamsOnNextHit(campaignUrl);
    }
})