在ListView中:Activity泄露了最初绑定在此处的ServiceConnection <youtube.player.internal>

Question

更新:

我刚刚在另一台设备上测试了我的应用程序,发现我确实在运行Android 4.4.2的Nexus 4上出现了错误,但没有在运行Android 4.0.4的Desire S上出现错误.他们都安装了当前的YouTube应用程序(5.3.32),这是使用API​​所必需的.

问题:为什么我会收到这些ServiceConnectionLeaked消息？(见下面的Logcat)

描述:

我正在使用YouTube Android Player API 1.0.0(https://developers.google.com/youtube/android/player/)使用以下适配器代码在ListView中加载视频缩略图:

private final Map<View, YouTubeThumbnailLoader> mThumbnailViewToLoaderMap;

public ListViewAdapter(Activity activity, int layoutId, List<Suggestion> suggestions) {
    super(activity, layoutId, suggestions);     
    mThumbnailViewToLoaderMap = new HashMap<View, YouTubeThumbnailLoader>();
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {

    ViewHolder holder;

    String videoId = getYoutubeId();

    // There are three cases here...
    if (convertView == null) {
        convertView = LayoutInflater.from(mActivity).inflate(R.layout.row_suggestion, parent, false);

        holder = new ViewHolder();
        holder.thumbnailView = (YouTubeThumbnailView) convertView.findViewById(R.id.youtubeThumbnail);

        // ... case 1: The youtube view has not yet been created - we need to initialize the YouTubeThumbnailView.
        holder.thumbnailView.setLayoutParams(mThumbnailLayoutParams);
        holder.thumbnailView.setTag(videoId);
        holder.thumbnailView.initialize(DeveloperKey.DEVELOPER_KEY, this);

        convertView.setTag(holder);

    } else {

        holder = (ViewHolder) convertView.getTag();

        // ... case 2 & 3 The view is already created and...
        YouTubeThumbnailLoader loader = mThumbnailViewToLoaderMap.get(holder.thumbnailView);

        // ... is currently being initialized. We store the current videoId in the tag.
        if (loader == null) {
            holder.thumbnailView.setTag(videoId);

        // ... already initialized. Simply set the right videoId on the loader.
        } else {
            loader.setVideo(videoId);
        }
    }

    holder.thumbnailView.setImageResource(R.drawable.thumbnail_loading);

    return convertView;
}


@Override
public void onInitializationSuccess(YouTubeThumbnailView youTubeThumbnailView, YouTubeThumbnailLoader youTubeThumbnailLoader) {
    String videoId = (String) youTubeThumbnailView.getTag();
    mThumbnailViewToLoaderMap.put(youTubeThumbnailView, youTubeThumbnailLoader);
    youTubeThumbnailLoader.setOnThumbnailLoadedListener(this);
    youTubeThumbnailLoader.setVideo(videoId);
}

public void releaseLoaders() {
    for (YouTubeThumbnailLoader loader : mThumbnailViewToLoaderMap.values()) {
        loader.release();
    }
}

保存此listView的Fragment具有以下代码:

private ListViewAdapter listViewAdapter;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setRetainInstance(true);
}

Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    rootView = (ViewGroup) inflater.inflate(R.layout.fragment_search_results, container, false);
    listView = (ListView) rootView.findViewById(R.id.suggestion_list);

    // see if there is already an adapter
    // and use it as our adapter (e.g. after device rotation)
    if (listViewAdapter != null) {
        listView.setAdapter(listViewAdapter);
    }

    return rootView;
}

@Override
public void onDestroyView() {
    super.onDestroyView();
    mListViewAdapter.releaseLoaders();
}

这是发生的事情:

• 片段已创建,YouTube缩略图已正确加载和显示.

现在我第一次旋转设备(让我们说横向方向):

• 创建了Fragment,现有的适配器连接到listView,但没有为所有当前可见的列表项加载缩略图.
• 当我向下滚动时,新的列表项进入屏幕.
  • 如果这样的新列表项使用新的ViewHolder,则其缩略图正确加载.
  • 如果这样的新列表项使用来自第一个可见列表项的ViewHolder,则根本不加载其缩略图.

因此,这会产生一个缩略图列表,这些缩略图可以正确加载并且根本不加载.现在我再次旋转设备(回到纵向):

• 创建Fragment,现有适配器连接到listView并正确加载所有缩略图.

现在我第三次旋转设备(我们再次处于先前错误的横向方向):

• 创建Fragment,现有适配器连接到listView并正确加载所有缩略图.

因此,只有在第一次设备旋转后才会发生某些事情,因此可见的缩略图不会加载到其列表项中.

logcat在第一次轮换后显示每个缩略图请求的以下消息:

    03-09 17:43:08.770  30446-30446/com.mypackage.name E/ActivityThread: Activity com.mypackage.name.activities.SearchActivity has leaked ServiceConnection com.google.android.youtube.player.internal.r$e@41b0a6c0 that was originally bound here
    android.app.ServiceConnectionLeaked: Activity com.mypackage.name.activities.SearchActivity has leaked ServiceConnection com.google.android.youtube.player.internal.r$e@41b0a6c0 that was originally bound here
            at android.app.LoadedApk$ServiceDispatcher.(LoadedApk.java:1041)
            at android.app.LoadedApk.getServiceDispatcher(LoadedApk.java:935)
            at android.app.ContextImpl.bindServiceAsUser(ContextImpl.java:1692)
            at android.app.ContextImpl.bindService(ContextImpl.java:1680)
            at android.content.ContextWrapper.bindService(ContextWrapper.java:496)
            at com.google.android.youtube.player.internal.r.e(Unknown Source)
            at com.google.android.youtube.player.YouTubeThumbnailView.initialize(Unknown Source)
            at com.mypackage.name.adapters.ListViewAdapter.getView(ListViewAdapter.java:94)
            at com.mypackage.name.views.ListView.obtainView(ListView.java:1285)
            at com.mypackage.name.views.ListView.fillDown(ListView.java:1046)
            at com.mypackage.name.views.ListView.populate(ListView.java:720)
            at com.mypackage.name.views.ListView.onLayout(ListView.java:677)
            at android.view.View.layout(View.java:14520)
            at android.view.ViewGroup.layout(ViewGroup.java:4604)
            at android.widget.RelativeLayout.onLayout(RelativeLayout.java:1077)
            at android.view.View.layout(View.java:14520)
            at android.view.ViewGroup.layout(ViewGroup.java:4604)
            at android.widget.FrameLayout.onLayout(FrameLayout.java:448)
            ...

为什么我会收到这些ServiceConnectionLeaked消息？

我已经搜索过,在大多数情况下,必须提供某种API初始化,其中必须提供应用程序上下文而不是活动上下文.但是对于YouTubePlayer Android API,没有这样的初始化(至少在我的部分代码中没有).

Answer 1

我终于找到了解决方案.我追踪了第一次创建所有vies和片段时发生的每一步,并将其与第一次旋转期间发生的事情进行比较.记下创建和重用的每个对象,我发现在片段的onCreateView-Method期间,我重新启动了listView,但是将旧的适配器设置为它.到目前为止,这不是一个问题,也不是良好的做法,因为我可以重新使用适配器所持有的每一个信息(如果我错了,请纠正我).

早期初始化适配器时存在问题.适配器在第一次旋转之前初始化,并将当前活动作为其上下文.因此,在轮换之后,它仍然具有旧的肖像活动作为上下文,尽管它在新创建的景观活动中存在.=>经典活动泄漏.

似乎YoutubeThumbnail-initializer使用了这个上下文,尽管没有提示或文档.因此,当我使用应用程序上下文初始化适配器时,此应用程序上下文将用于YouTubeThumbnails,并且不会产生任何泄漏.