即使父 Activity 暂停，admob AdView 使用的 WebViewCoreThread 也在使用高 CPU

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问题描述

我正在使用 Google Admob SDK v6.1.0 (https://developers.google.com/mobile-ads-sdk/download)，并以编程方式(不是 XML)实例化 com.google.ads.AdView，并将其动态添加到我的 Activity 中的 LinearLayout 中.

I'm using Google Admob SDK v6.1.0 (https://developers.google.com/mobile-ads-sdk/download), and I instantiate the com.google.ads.AdView programmatically (not in XML), and add it into a LinearLayout, dynamically in my Activity.

我的一位用户报告说，当他们在我的 Activity 中单击 Home 按钮(以使其成为背景)时，他们开始看到来自我的应用的 CPU 使用率很高.我能够在 Jellybean 平台上重现这一点，并注意到高 CPU 使用率的来源是 WebViewCoreThread.

One of my users reported that when they click the Home button while in my Activity (in order to background it), they start seeing high CPU usage sourced to my app. I was able to reproduce this on a Jellybean platform, and noticed that the source for high CPU usage was a WebViewCoreThread.

我的 Activity 根本不使用任何 WebView，但我能够逐步完成 Activity 的初始化，并注意到当我实例化 AdMob AdView 对象时，这个 WebViewCoreThread 启动.正如 AdMob 引用中的状态，我在我的 Activity 的 onDestroy() 方法中对这个 AdView 调用了 destroy().我也更改了我的代码，在我的 onPause() 方法中调用 AdView.onDestroy().但似乎没有什么会导致 WebViewCoreThread 停止.我想，如果那个线程粘在我身边，我会没事的.但是如果我一遍又一遍地启动我的活动，这个线程开始使用我的 CPU 的 8% 到 25% 之间的任何地方，即使我的活动不在前台.

My Activity doesn't use any WebViews at all, but I was able to step through my Activity's initialization, and noticed that this WebViewCoreThread starts when I instantiate the AdMob AdView object. As state in the AdMob's references, I call destroy() on this AdView in my Activity's onDestroy() method. And I aso changed my code to call AdView.onDestroy() in my onPause() method. But nothing seems to be causing the WebViewCoreThread to stop. I guess, I'm okay if that thread sticks around. But if I start my Activity several times over and over again, this thread starts using anywhere between 8 to 25% of my CPU, even my activity is not in the foreground.

我注意到其他一些用户说您必须调用 WebView.onPause() 作为纠正措施.(http://stackoverflow.com/questions/2040963/webview-threads-never-stop-webviewcorethread-cookiesyncmanager-http0-3) 但这对我来说是不可能的，因为我的网络视图是由 AdMob 的 AdView 创建的.我还更改了我的代码，为 mt Admob AdView 的容器 LinearLayout 对象调用 .removeAllViews()，然后调用 System.gc() 强制垃圾收集，但似乎没有什么能杀死我的 WebViewCoreThread，最终它开始占用 CPU，直到我强制-杀死我的应用程序的进程.

I noticed a few other users saying that you must call WebView.onPause() as a corrective action. (http://stackoverflow.com/questions/2040963/webview-threads-never-stop-webviewcorethread-cookiesyncmanager-http0-3) But this isn't directly possible for me, since my web view is created by AdMob's AdView. I also changed my code to call .removeAllViews() for mt Admob AdView's container LinearLayout object, and then call System.gc() to force garbage collection, but nothing seems to kill my WebViewCoreThread and eventually it starts eating up the CPU until I force-kill my app's process.

任何线索为什么 AdMob 会这样做，以及如何强制终止该线程?

Any clues why AdMob is doing this, and how I can force this thread to be killed?

我附加了一个我创建的类来封装 AdView 创建和销毁.我在我的活动初始化中调用了这个类的 getNewAd() 方法.我在我的 Activity 的 onPause() 和 onDestroy() 方法中调用了这个类的 removeAd():

I'm attaching a class that I created to encapsulate AdView creation and destruction. I call this class's getNewAd() method in my activity's initialization. And I call this class's removeAd() in my Activity's onPause() and onDestroy() methods:

package com.shiprack.client;

import com.google.ads.AdRequest;
import com.google.ads.AdSize;
import com.google.ads.AdView;
import com.mobclix.android.sdk.Mobclix;
import com.mobclix.android.sdk.MobclixMMABannerXLAdView;

import android.app.Activity;
import android.view.Gravity;
import android.view.ViewGroup.LayoutParams;
import android.widget.LinearLayout;

public class AdManager {
    public AdManager(EventLog logger, LinearLayout container, Activity activity) {
        _container = container;
        _activity = activity;
        _eventLogger = logger;
    }

    public void setNetwork(int network) {
        _network = network;
    }

    public void getNewAd() {
        LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(LayoutParams.FILL_PARENT,LayoutParams.FILL_PARENT);
        params.gravity = Gravity.CENTER;
        switch (_network) {
            case TrackDatabase.AD_NETWORK_ADMOB: {
                _admobBanner = new AdView(_activity, AdSize.BANNER, "a14dc419375634c");
                _container.addView(_admobBanner, params);
                _admobBanner.loadAd(new AdRequest());
                break;
            }
            case TrackDatabase.AD_NETWORK_MOBCLIX: {
                Mobclix.onCreate(_activity);
                _mobclixBanner = new MobclixMMABannerXLAdView(_activity);
                _container.addView(_mobclixBanner, params);
                _mobclixBanner.getAd();
                break;
            }
        }
    }

    public void removeAd() {
        switch (_network) {
            case TrackDatabase.AD_NETWORK_ADMOB: {
                _admobBanner.destroy();
                break;
            }
            case TrackDatabase.AD_NETWORK_MOBCLIX: {
                _mobclixBanner.cancelAd();
                break;
            }
        }
        _container.removeAllViews();
    }

    private EventLog _eventLogger;
    private LinearLayout _container;
    private Activity _activity;
    private AdView _admobBanner;
    private MobclixMMABannerXLAdView _mobclixBanner;
    private int _network;
}

即使父 Activity 暂停，admob AdView 使用的 WebViewCoreThread 也在使用高 CPU

问题描述

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