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我正在尝试将 Google Analytics 集成到我的应用程序中,并按照此处的教程进行一切设置:

我有一个 MainActivity 扩展 Activity 并附加了三个 Tab 片段,我在这个 Activity 中初始化代码,如:

private static final String PROPERTY_ID = "UA-xxxxxx";

    //Logging TAG
    private static final String TAG = "MyApp";

    public static int GENERAL_TRACKER = 0;

    public enum TrackerName {
        APP_TRACKER, 
        GLOBAL_TRACKER, 
        ECOMMERCE_TRACKER,
    }

    HashMap<TrackerName, Tracker> mTrackers = new HashMap<TrackerName, Tracker>();

    public MainActivity() {
        super();
    }

    synchronized Tracker getTracker(TrackerName trackerId) {
        if (!mTrackers.containsKey(trackerId)) {

            GoogleAnalytics analytics = GoogleAnalytics.getInstance(this);
            Tracker t = (trackerId == TrackerName.APP_TRACKER) ? analytics.newTracker(R.xml.app_tracker)
                    : (trackerId == TrackerName.GLOBAL_TRACKER) ? analytics.newTracker(PROPERTY_ID)
                            : analytics.newTracker(R.xml.ecommerce_tracker);
                    mTrackers.put(trackerId, t);

        }
        return mTrackers.get(trackerId);
    }

现在在我想要做的一个选项卡中:

((MainActivity) getApplication()).getTracker(MainActivity.TrackerName.APP_TRACKER);

但是我得到以下信息:

无法在上述代码行中从 Application 转换为 MainActivity。有什么提示吗?我试图在其中使用它的片段具有以下签名:

public class FragmentTab1 extends Fragment
4

1 回答 1

3

如果您在片段中调用它,也许您需要调用 getActivity 来代替?

((MainActivity) getActivity()).getTracker(MainActivity.TrackerName.APP_TRACKER); 
于 2014-09-03T07:42:51.420 回答