安卓：LoaderCallbacks.OnLoadFinished叫了两声

问题描述

我注意到采用了Android装载机和片段奇怪的现象。当我方向更改后调用LoaderManager.initLoader（）onLoadFinished不叫（尽管文档建议我应该ppared这个$ P $），但是在此之后叫了两声。这里是链接发布在谷歌组，描述了同样的情况<一href="https://groups.google.com/forum/?fromgroups#!topic/android-developers/aA2vHYxSskU">https://groups.google.com/forum/?fromgroups#!topic/android-developers/aA2vHYxSskU 。我写了示例应用程序中，我只简单的初始化加载在Fragment.onActivityCreated（）检查，如果发生这种情况，它确实。任何人都注意到了这一点？

I noticed strange situation using Android Loaders and Fragments. When I invoke LoaderManager.initLoader() after orientation change onLoadFinished is not called (although documentation suggests I should be prepared for this) but it is called twice after this. Here is link to post in google groups which describe the same situation https://groups.google.com/forum/?fromgroups#!topic/android-developers/aA2vHYxSskU . I wrote sample application in which I only init simple Loader in Fragment.onActivityCreated() to check if this happens and it does. Anyone noticed this?

推荐答案

您可以把您的片段的onResume（）回调内部initLoader（）方法;那么装载机的onLoadFinished（）将不会被两次再调用。

You can put the initLoader() method inside your Fragment's onResume() callback; then the Loader's onLoadFinished() will not be called twice anymore.

    @Override
public void onResume()
{
    super.onResume();
    getLoaderManager().initLoader(0, null, this);
}

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