Question

我有一个带有两个片段的ViewPager，每个片段都有一个RecyclerView。问题是，在我在另一个片段中添加第二个Recycler之前，一个Recycler一直没有问题。

当我滚动第二个Recycler时，第一个回收商中的项目（带有图像和文本的cardview）做了一些奇怪的事情。基本上，cardview的文本随机消失，有些项目有文本，有些则没有。即使是小吃店也不会再出现了。

知道发生了什么事吗？

activity_main.xml中

<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/drawer_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <android.support.design.widget.CoordinatorLayout
        android:id="@+id/coordinator_layout"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <!-- Toolbar -->
        <android.support.design.widget.AppBarLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content">

            <include android:id="@+id/appbar"
                layout="@layout/aux_toolbar_main"/>

            <android.support.design.widget.TabLayout
                android:id="@+id/tabs"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                style="@style/MyCustomTabLayout"
                app:tabMode="fixed"
                app:tabGravity="fill"/>

        </android.support.design.widget.AppBarLayout>

        <android.support.v4.view.ViewPager
            android:id="@+id/viewPager"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_below="@+id/tabs"
            android:background="@android:color/white"
            app:layout_behavior="@string/appbar_scrolling_view_behavior"/>

    </android.support.design.widget.CoordinatorLayout>

    <include layout="@layout/left_navigation_drawer"/>

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

main.java

@Override
protected void onCreate(Bundle savedInstanceState)
{
    super.onCreate(savedInstanceState);

    setContentView(R.layout.activity_main);

    _initToolbar();
    _initViewPager();
    _initNavigationDrawer();
    _initAnimations();

    mBackPressed = 0;
}

private void _initViewPager()
{
    mViewPager = (ViewPager) findViewById(R.id.viewPager);
    mTabLayout = (TabLayout) findViewById(R.id.tabs);

    ViewPagerAdapter adapter = new ViewPagerAdapter(getSupportFragmentManager());

    mProductsFragment    = new ProductsFragment();
    mRecommendedFragment = new RecommendedFragment();

    adapter.addFragment(mRecommendedFragment, "Fragment 2");
    adapter.addFragment(mProductsFragment, "Fragment 1");
    mViewPager.setAdapter(adapter);

    mViewPager.setCurrentItem(1);
    mTabLayout.setupWithViewPager(mViewPager);
}

class ViewPagerAdapter extends FragmentStatePagerAdapter
{
    private final List<Fragment> mFragmentList = new ArrayList<>();
    private final List<String> mFragmentTitleList = new ArrayList<>();

    public ViewPagerAdapter(FragmentManager manager)
    {
        super(manager);
    }

    @Override
    public Fragment getItem(int position)
    {
        return mFragmentList.get(position);
    }

    @Override
    public int getCount()
    {
        return mFragmentList.size();
    }

    public void addFragment(Fragment fragment, String title)
    {
        mFragmentList.add(fragment);
        mFragmentTitleList.add(title);
    }

    @Override
    public CharSequence getPageTitle(int position)
    {
        return mFragmentTitleList.get(position);
    }
}

Fragment1.xml

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/frame"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.wallakoala.wallakoala.Fragments.ProductsFragment">

    <!-- Recycler Grid -->
    <android.support.v7.widget.RecyclerView
        android:id="@+id/grid_recycler"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:scrollbars="none"
        android:clipToPadding="false"/>

    ...

</FrameLayout>

Fragment2.xml 如果我滚动这个回收站，会发生奇怪的事情。

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/recommended_frame"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    xmlns:app="http://schemas.android.com/apk/res-auto">

    <android.support.v7.widget.RecyclerView
        android:id="@+id/recommended_grid_recycler"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:scrollbars="none"
        android:clipToPadding="false"/>

    ...

</FrameLayout>

编辑：添加两个片段代码

Fragment1.java 当奇怪的事情发生时。

@Override
@SuppressWarnings("ConstantConditions")
public void onActivityCreated(Bundle savedInstanceState)
{
    super.onActivityCreated(savedInstanceState);

    // FrameLayout
    mFrameLayout = (FrameLayout)getView().findViewById(R.id.frame);

    ...

    // RecyclerView
    mProductsRecyclerView = (RecyclerView)getView().findViewById(R.id.grid_recycler);

    _initRecyclerView();
}

@SuppressWarnings("deprecation")
private void _initRecyclerView()
{
    mProductsRecyclerView.setVisibility(View.VISIBLE);

    mStaggeredGridLayoutManager = new StaggeredGridLayoutManager(2, StaggeredGridLayoutManager.VERTICAL);
    mProductAdapter = new ProductsGridAdapter(getActivity()
                                , mProductsDisplayedList
                                , mFrameLayout);

    mProductsRecyclerView.setHasFixedSize(true);
    mProductsRecyclerView.setLayoutManager(mStaggeredGridLayoutManager);
    mProductsRecyclerView.setAdapter(mProductAdapter);
    mProductsRecyclerView.setItemViewCacheSize(NUM_CACHED_PRODUCTS);
    mProductsRecyclerView.setOnScrollListener(new RecyclerView.OnScrollListener()
    {
        boolean scrollingUp;

        @Override
        public void onScrollStateChanged(RecyclerView recyclerView, int newState) {}

        @Override
        public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
            scrollingUp = dy > 0;

            if (scrollingUp)
            {
                ...
            }
        }
    });
}

Fragment2.java 如果我滚动此回收器，它会弄乱另一个

@Override
@SuppressWarnings("ConstantConditions")
public void onActivityCreated(Bundle savedInstanceState)
{
    super.onActivityCreated(savedInstanceState);

    // FrameLayout
    mFrameLayout = (FrameLayout)getView().findViewById(R.id.recommended_frame);

    // RecyclerView
    mProductsRecyclerView = (RecyclerView)getView().findViewById(R.id.recommended_grid_recycler);

    _initRecyclerView();
}

private void _initRecyclerView()
{
    mGridLayoutManager = new GridLayoutManager(getActivity(), 1);
    mProductAdapter = new RecommendedListAdapter(getActivity()
            , mProductsDisplayedList
            , mFrameLayout);

    mProductsRecyclerView.setLayoutManager(mGridLayoutManager);
    mProductsRecyclerView.setAdapter(mProductAdapter);
    mProductsRecyclerView.setVisibility(View.VISIBLE);
    mProductsRecyclerView.setOnScrollListener(new RecyclerView.OnScrollListener()
    {
        boolean scrollingUp;

        @Override
        public void onScrollStateChanged(RecyclerView recyclerView, int newState) {}

        @Override
        public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
            scrollingUp = dy > 0;

            if (scrollingUp)
            {
                ...
            }
        }
    });
}

我不想用代码填充整个页面，所以如果缺少某些代码，我会添加它。

提前致谢，

在ViewPager中使用两个RecyclerView的奇怪行为

0 个答案: