独特用户的数量如何大于用户？谷歌分析

Question

我正在使用我的Android应用程序进行谷歌分析活动跟踪， 我不明白独特用户（只下载一次应用的用户）比用户（新用户和回访用户）更大。 这是一个屏幕截图：

编辑，这是我的android代码：

清单：

<!-- Enable Google Play Store Campaign reports -->
        <receiver
            android:name=".analytics.CustomCampaignTrackingReceiver"
            android:exported="true"
            android:permission="android.permission.INSTALL_PACKAGES">
            <intent-filter>
                <action android:name="com.android.vending.INSTALL_REFERRER" />
            </intent-filter>
        </receiver>
        <service
            android:name="com.google.android.gms.analytics.CampaignTrackingService"
            android:enabled="true" />

我的自定义接收器：

public class CustomCampaignTrackingReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {

        //get campaign url
        String campaignUrl = intent.getStringExtra("referrer");
       // Log.i("GAThread", "campaign Url:" + campaignUrl);

        SharedStorage.defaultInstance(context).setCampaignTrackingUrl(campaignUrl);

        // When you're done, pass the intent to the Google Analytics receiver.
        new CampaignTrackingReceiver().onReceive(context, intent);
    }
}

默认跟踪器：

 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);
            analytics.setLocalDispatchPeriod(5);
            //analytics.getLogger().setLogLevel(Logger.LogLevel.VERBOSE);
            // To enable debug logging use: adb shell setprop log.tag.GAv4 DEBUG
            mTracker = analytics.newTracker("********");
        }

        String userId = Storage.getUserId(this);
        if (userId != null)
            mTracker.set("&uid", userId);

        return mTracker;
    }

在onResume和onPause活动中我发送open＆amp;关闭应用程序事件：

onResume(){
 getDefaultTracker().send(new HitBuilders.EventBuilder()
                .setCategory(referrer)//category would be campaign tracking url
                .setAction("openApp")
                .setLabel(userId)
                .build());

}

onPause(){

  getDefaultTracker().send(new HitBuilders.EventBuilder()
                    .setCategory(referrer)//category would be campaign tracking url
                    .setAction("closeApp")
                    .setLabel(userId)
                    .build());
}