When switch fragment with SwipeRefreshLayout during refreshing, fragment freezes but actually still work
UPDATE: I thought it worked correctly. But after some test trouble still exists *sniff*
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
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>
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>
And here is onCreateView()
of ContentView
@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;
}
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.
Well... After some struggling I eventually solved this problem by myself, in a tricky way...
I just need to add these in onPause()
:
@Override
public void onPause() {
super.onPause();
...
if (mSwipeRefreshLayout!=null) {
mSwipeRefreshLayout.setRefreshing(false);
mSwipeRefreshLayout.destroyDrawingCache();
mSwipeRefreshLayout.clearAnimation();
}
}
This issue seems to still be occurring in appcompat 22.1.1. Wrapping the SwipeRefreshLayout inside a FrameLayout solved this for me
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.v4.widget.SwipeRefreshLayout
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>
</FrameLayout>
In addition to @zlm2012 answer, I noticed that this issue was reproduced under Support Library 21.0.0, but seems to be fixed right now at 21.0.3
The solution works, but I think it is better just put those lines into its own function, like:
public void terminateRefreshing() {
mSwipeRefreshLayout.setRefreshing(false);
mSwipeRefreshLayout.destroyDrawingCache();
mSwipeRefreshLayout.clearAnimation();
}
and call when switching the fragment.
Fragment prevFrag = fragmentManager.findFragmentById(drawerContainerId);
if(prevFrag instanceof SwipeRefreshFragment) {
((SwipeRefreshFragment)prevFrag).terminateRefreshing();
}
fragmentManager.beginTransaction().replace(drawerContainerId, fragment).commit();