更新:我以为它已经正确执行了,但在进行一些测试后发现问题仍然存在*哭泣*
于是我制作了一个更简单的版本来查看到底发生了什么,我知道应该被分离的刷新片段仍然留在那里。确切地说,旧片段的视图还留在那里,覆盖在较新的片段上面。由于我的原始应用程序的RecyclerView背景不透明,所以结果就像我之前说的那样。
更新结束
我有一个类似这样的布局MainActivity
:
<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>
我使用的用于填充@id/container
的片段ContentView
配置如下:
<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ContentView
的onCreateView()
方法
@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
中,我通过切换不同的ContentView
来显示内容。一切看起来都很好,除了一个问题:当我在导航抽屉正在刷新时切换ContentView
片段,内容会停止更新。但实际上所有的事情都像平常一样工作,只是你看不到它。