当SwipeRefreshLayout开关片段中令人耳目一新，片段冻结但实际上仍工作 [英] When switch fragment with SwipeRefreshLayout during refreshing, fragment freezes but actually still work

问题描述

更新：我认为它工作正常。但经过一些测试的麻烦仍然存在*嗅出*

于是我做了一个简单的版本，看看究竟发生，我结识了令人耳目一新的片段应该已经分离仍留在那里。或者准确地说，旧片段的观点离开了那里，在的新片段上。由于我原来的应用程序RecyclerView的背景是不是透明的，所以原来我以前说过。

Then I made a simpler version to see what exactly happen and I get to know that the refreshing fragment which should have been detached still left there. Or exactly, the view of the old fragment left there, on top of the newer fragment. Since RecyclerView's background of my original app is not transparent, so It turned out what I said before.

END OF UPDATE

我有一个 MainActivity 有这样的布局：

I have a MainActivity with layout like this:

<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools" android:id="@+id/drawer_layout"
android:layout_width="match_parent" android:layout_height="match_parent">

    <!-- As the main content view, the view below consumes the entire
         space available using match_parent in both dimensions. -->
    <FrameLayout android:id="@+id/container" android:layout_width="match_parent"
        android:layout_height="match_parent" />

    <!-- android:layout_gravity="start" tells DrawerLayout to treat
         this as a sliding drawer on the left side for left-to-right
         languages and on the right side for right-to-left languages.
         If you're not building against API 17 or higher, use
         android:layout_gravity="left" instead. -->
    <!-- The drawer is given a fixed width in dp and extends the full height of
         the container. -->
    <fragment android:id="@+id/navigation_drawer"
        android:layout_width="@dimen/navigation_drawer_width" android:layout_height="match_parent"
        android:layout_gravity="start" tools:layout="@layout/fragment_navigation_drawer" />

</android.support.v4.widget.DrawerLayout>

该片段内容查看我用它来填补 @ ID /容器配置为：

The fragment ContentView I use to fill @id/container is configured as:

<android.support.v4.widget.SwipeRefreshLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/contentView"
android:layout_width="match_parent"
android:layout_height="match_parent">

<android.support.v7.widget.RecyclerView
    android:id="@+id/tweet_list"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/grey_300"/>

</android.support.v4.widget.SwipeRefreshLayout>

这里是 onCreateView（） 内容查看

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    // Inflate the layout for this fragment
    View inflatedView = inflater.inflate(R.layout.fragment_content, container, false);

    mRecyclerView = (RecyclerView) inflatedView.findViewById(R.id.tweet_list);
    mRecyclerView.setHasFixedSize(false);

    mLinearLayoutManager = new LinearLayoutManager(getActivity().getApplicationContext());
    mRecyclerView.setLayoutManager(mLinearLayoutManager);

    mTweetList = new ArrayList<Tweet>;
    mAdapter = new TweetAdapter(mTweetList);
    mRecyclerView.setAdapter(mAdapter);
    mRecyclerView.setItemAnimator(new DefaultItemAnimator());

    mSwipeRefreshLayout = (SwipeRefreshLayout) inflatedView.findViewById(R.id.contentView);
    mSwipeRefreshLayout.setOnRefreshListener(
        ...
    );
    return inflatedView;
}

然后在 MainActivity 我切换到显示通过切换不同的内容内容查看。所有看起来不错，除了一件事：当我切换内容查看片段期间由抽屉式导航栏，然后内容冻结耳目一新。但实际上所有的东西像往常一样工作，除非你还看不出来。

Then in MainActivity I switch the content to display by switching different ContentView. All looks good except one thing: when I switch ContentView fragments DURING refreshing by navigation drawer, then content freezes. But actually all things work as usual except you cannot see it.

推荐答案

嗯......经过一番挣扎我最终被自己解决了这个问题，在一个取巧的办法......

Well... After some struggling I eventually solved this problem by myself, in a tricky way...

我只需要在的onPause添加这些（）：

@Override
public void onPause() {
    super.onPause();
    ...

    if (mSwipeRefreshLayout!=null) {
        mSwipeRefreshLayout.setRefreshing(false);
        mSwipeRefreshLayout.destroyDrawingCache();
        mSwipeRefreshLayout.clearAnimation();
    }
}

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