应用安装的Google分析，广告系列归因

Question

Google关于广告系列跟踪的文档充其量是混乱的。

是否有教程或示例（Google样本似乎不包括广告系列归因），其中显示了如何设置广告系列归因？

例如，doc说

// Get tracker.
Tracker t = ((AnalyticsSampleApp) getActivity().getApplication()).getTracker(
    TrackerName.APP_TRACKER);
// Set screen name.
t.setScreenName(screenName);

// In this example, campaign information is set using
// a url string with Google Analytics campaign parameters.
// Note: This is for illustrative purposes. In most cases campaign
//       information would come from an incoming Intent.
String campaignData = "http://examplepetstore.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(campaignData)
    .build()
);

显然我们只想报告安装一次，但我该怎么办呢？ doc没有说我们应该放置代码的位置。