我正在读一本新的谷歌Android分析教程，首先，当我在我的等级中添加这些字符串时：

classpath 'com.google.gms:google-services:1.3.0-beta1'
apply plugin: 'com.google.gms.google-services'

我无法同步我的项目(插件找不到错误)。第二，应用程序子类：

package com.google.samples.quickstart.analytics;

import android.app.Application;

import com.google.android.gms.analytics.GoogleAnalytics;
import com.google.android.gms.analytics.Logger;
import com.google.android.gms.analytics.Tracker;

/**
 * This is a subclass of {@link Application} used to provide shared objects for this app, such as
 * the {@link Tracker}.
 */
public class AnalyticsApplication extends Application {
  private Tracker mTracker;

  /**
   * Gets the default {@link Tracker} for this {@link Application}.
   * @return tracker
   */
  synchronized public Tracker getDefaultTracker() {
    if (mTracker == null) {
      GoogleAnalytics analytics = GoogleAnalytics.getInstance(this);
      // To enable debug logging use: adb shell setprop log.tag.GAv4 DEBUG
      mTracker = analytics.newTracker(R.xml.global_tracker);
    }
    return mTracker;
  }
}

我不知道在哪里能找到R.xml.global_tracker文档？