java - 尝试实现 Google Analytics，错误跟踪器类无法解析为变量

Question

我按照谷歌给出的说明并使用示例应用程序。 eclipse 在主屏幕中说，MyApplication 无法解析为变量，但是如果我按住 ctrl+单击它，它会跳转到 MyApplication.java...出了什么问题？

这是 MyApplication.java

public class MyApplication extends Application{

    HashMap<TrackerName, Tracker> mTrackers = new HashMap<TrackerName, Tracker>();
    private static final String PROPERTY_ID = "UA-61709726-1";



    public static int GENERAL_TRACKER = 0;

    public enum TrackerName {
        APP_TRACKER, // Tracker used only in this app.
        GLOBAL_TRACKER, // Tracker used by all the apps from a company. eg: roll-up tracking.
        ECOMMERCE_TRACKER, // Tracker used by all ecommerce transactions from a company.
    }

    public MyApplication() {
        super();
    }

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

                GoogleAnalytics analytics = GoogleAnalytics.getInstance(this);
                analytics.getLogger().setLogLevel(Logger.LogLevel.VERBOSE);
                Tracker t = (trackerId == TrackerName.APP_TRACKER) ? analytics.newTracker(PROPERTY_ID)
                        : (trackerId == TrackerName.GLOBAL_TRACKER) ? analytics.newTracker(
                                R.xml.global_tracker)
                                : analytics.newTracker(R.xml.ecommerce_tracker);
                t.enableAdvertisingIdCollection(true);

                mTrackers.put(trackerId, t);
            }
            return mTrackers.get(trackerId);



        }
}

这是 MainScreen.java

//...............
@Override
    public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);


        Tracker t = ( (MyApplication) .getApplication()).getTracker(
                  TrackerName.APP_TRACKER);

              // Set screen name.
              t.setScreenName("MainScreen");

              // Send a screen view.
              t.send(new HitBuilders.ScreenViewBuilder().build());

//................

我的 list :

 //................

<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

    <application
       android:name=".MyApplication">  <!-- replace with your app class-->
        android:allowBackup="true"
        android:icon="@drawable/app_icon"
        android:label="@string/app_name"
        android:largeHeap="true"
        android:theme="@style/AppTheme" >

        <meta-data
            android:name="com.facebook.sdk.ApplicationId"

 //................

Answer 1

您需要让 Android 知道您希望它使用自定义应用程序实现而不是默认的 android.app.Application 。为此，您需要添加 android:name="<your-app-class>"属性到您的 AndroidManifest.xml:

<manifest>
  ...
  <application
    android:name=".MyApplication">  <!-- replace with your app class-->
    ...
  </application>
</manifest>