Java Code Examples for eu.davidea.flexibleadapter.FlexibleAdapter#useTag()

private void initializeRecyclerView() {
    // Initialize Adapter and RecyclerView
    // Use of stableIds, I strongly suggest to implement 'item.hashCode()'
    FlexibleAdapter.useTag("ViewPagerAdapter");
    mAdapter = new FlexibleAdapter<>(createList(50, 5), getActivity(), true);
    mAdapter.setAnimationOnForwardScrolling(DatabaseConfiguration.animateOnForwardScrolling);

    RecyclerView mRecyclerView = getView().findViewById(R.id.recycler_view);
    mRecyclerView.setLayoutManager(new SmoothScrollLinearLayoutManager(getActivity()));
    mRecyclerView.setAdapter(mAdapter);
    mRecyclerView.setHasFixedSize(true); //Size of RV will not change
    // NOTE: Use default item animator 'canReuseUpdatedViewHolder()' will return true if
    // a Payload is provided. FlexibleAdapter is actually sending Payloads onItemChange.
    mRecyclerView.setItemAnimator(new DefaultItemAnimator());

    // Add FastScroll to the RecyclerView, after the Adapter has been attached the RecyclerView!!!
    FastScroller fastScroller = getView().findViewById(R.id.fast_scroller);
    mAdapter.setFastScroller(fastScroller);

    // Sticky Headers
    mAdapter.setDisplayHeadersAtStartUp(true)
            .setStickyHeaders(true);
}
 

@SuppressWarnings({"ConstantConditions", "NullableProblems"})
private void initializeRecyclerView(Bundle savedInstanceState) {
    // Initialize Adapter and RecyclerView
    FlexibleAdapter.useTag("DataBindingAdapter");
    mAdapter = new BindingFlexibleAdapter<>(getActivity(), true);
    mAdapter.setAnimationOnForwardScrolling(DatabaseConfiguration.animateOnForwardScrolling);
    mRecyclerView = getView().findViewById(R.id.recycler_view);
    mRecyclerView.setLayoutManager(createNewLinearLayoutManager());
    mRecyclerView.setAdapter(mAdapter);
    mRecyclerView.setHasFixedSize(true); //Size of RV will not change
    // NOTE: Use default item animator 'canReuseUpdatedViewHolder()' will return true if
    // a Payload is provided. FlexibleAdapter is actually sending Payloads onItemChange.
    mRecyclerView.setItemAnimator(new GarageDoorItemAnimator());

    // Add FastScroll to the RecyclerView, after the Adapter has been attached the RecyclerView!!!
    FastScroller fastScroller = getView().findViewById(R.id.fast_scroller);
    mAdapter.setFastScroller(fastScroller);

    // New empty views handling, to set after FastScroller
    EmptyViewHelper.create(mAdapter,
            getView().findViewById(R.id.empty_view),
            getView().findViewById(R.id.filter_view));

    mAdapter.setLongPressDragEnabled(true)
            .setHandleDragEnabled(true)
            .setSwipeEnabled(true)
            .setDisplayHeadersAtStartUp(true)
            .setStickyHeaders(true);

    SwipeRefreshLayout swipeRefreshLayout = getView().findViewById(R.id.swipeRefreshLayout);
    swipeRefreshLayout.setEnabled(true);
    mListener.onFragmentChange(swipeRefreshLayout, mRecyclerView, Mode.IDLE);

    mAdapter.addScrollableHeaderWithDelay(new ScrollableUseCaseItem(
            getString(R.string.databinding_use_case_title),
            getString(R.string.databinding_use_case_description)), 500L, false);
}
 

@SuppressWarnings({"ConstantConditions", "NullableProblems"})
private void initializeRecyclerView(Bundle savedInstanceState) {
    // Initialize Adapter and RecyclerView
    // ExampleAdapter makes use of stableIds, I strongly suggest to implement 'item.hashCode()'
    FlexibleAdapter.useTag("StaggeredLayoutAdapter");
    mAdapter = new FlexibleAdapter<>(DatabaseService.getInstance().getDatabaseList(), getActivity());
    mRecyclerView = getView().findViewById(R.id.recycler_view);
    // Customize the speed of the smooth scroll.
    // NOTE: Every time you change this value you MUST recreate the LayoutManager instance
    // and to assign it again to the RecyclerView!
    TopSnappedSmoothScroller.MILLISECONDS_PER_INCH = 33f; //Make faster the smooth scroll
    mRecyclerView.setLayoutManager(createNewStaggeredGridLayoutManager());
    // This value is restored to 100f (default) right here, because it is used in the
    // constructor by Android. If we don't change it now, others LayoutManager will be
    // impacted too by the above modification!
    TopSnappedSmoothScroller.MILLISECONDS_PER_INCH = 100f;

    mRecyclerView.setAdapter(mAdapter);
    mRecyclerView.setHasFixedSize(true); //Size of RV will not change
    // NOTE: Use default item animator 'canReuseUpdatedViewHolder()' will return true if
    // a Payload is provided. FlexibleAdapter is actually sending Payloads onItemChange.
    mRecyclerView.setItemAnimator(new DefaultItemAnimator());
    mRecyclerView.addItemDecoration(new FlexibleItemDecoration(getActivity())
            .addItemViewType(R.layout.recycler_staggered_item, 8)
            .withEdge(true));

    mAdapter.setDisplayHeadersAtStartUp(true) //Show Headers at startUp!
            .setNotifyMoveOfFilteredItems(true)
            .setPermanentDelete(true) //Default=true
            .setOnlyEntryAnimation(true);

    SwipeRefreshLayout swipeRefreshLayout = getView().findViewById(R.id.swipeRefreshLayout);
    swipeRefreshLayout.setEnabled(true);
    mListener.onFragmentChange(swipeRefreshLayout, mRecyclerView, Mode.IDLE);

    // Add 1 Scrollable Header
    mAdapter.addScrollableHeader(new ScrollableUseCaseItem(
            getString(R.string.staggered_use_case_title),
            getString(R.string.staggered_use_case_description)));
}
 

@SuppressWarnings({"ConstantConditions", "NullableProblems"})
private void initializeRecyclerView(Bundle savedInstanceState) {
    FlexibleAdapter.useTag("AnimatorsAdapter");
    mAdapter = new ExampleAdapter(DatabaseService.getInstance().getDatabaseList(), getActivity());
    mAdapter.expandItemsAtStartUp()
            .setAutoCollapseOnExpand(false)
            .setAutoScrollOnExpand(true)
            .setOnlyEntryAnimation(false)
            .setAnimationEntryStep(true) //In Overall, watch the effect at initial loading when Grid Layout is set
            .setAnimationOnForwardScrolling(DatabaseConfiguration.animateOnForwardScrolling)
            .setAnimationOnReverseScrolling(true)
            .setAnimationInterpolator(new DecelerateInterpolator())
            .setAnimationDuration(300L);
    mRecyclerView = getView().findViewById(R.id.recycler_view);
    mRecyclerView.setLayoutManager(createNewLinearLayoutManager());
    mRecyclerView.setAdapter(mAdapter);
    //mRecyclerView.setHasFixedSize(true); //Size of RV will not change

    // NOTE: Custom item animators inherit 'canReuseUpdatedViewHolder()' from Default Item
    // Animator. It will return true if a Payload is provided. FlexibleAdapter is actually
    // sending Payloads onItemChange notifications.
    mRecyclerView.setItemAnimator(new FlexibleItemAnimator());
    initializeSpinnerItemAnimators();
    initializeSpinnerScrollAnimators();

    mAdapter.setSwipeEnabled(true)
            .getItemTouchHelperCallback()
            .setSwipeFlags(ItemTouchHelper.RIGHT); //Enable swipe

    SwipeRefreshLayout swipeRefreshLayout = getView().findViewById(R.id.swipeRefreshLayout);
    swipeRefreshLayout.setEnabled(false);
    mListener.onFragmentChange(swipeRefreshLayout, mRecyclerView, Mode.IDLE);

    // Add 1 Scrollable Header
    mAdapter.addScrollableHeader(new ScrollableUseCaseItem(
            getString(R.string.animator_use_case_title),
            getString(R.string.animator_use_case_description)));
}
 

@SuppressWarnings({"ConstantConditions", "NullableProblems"})
private void initializeRecyclerView(Bundle savedInstanceState) {
    // Initialize Adapter and RecyclerView
    // ExampleAdapter makes use of stableIds, I strongly suggest to implement 'item.hashCode()'
    FlexibleAdapter.useTag("HolderSectionsAdapter");
    mAdapter = new ExampleAdapter(DatabaseService.getInstance().getDatabaseList(), getActivity());

    mRecyclerView = getView().findViewById(R.id.recycler_view);
    mRecyclerView.setLayoutManager(createNewLinearLayoutManager());
    mRecyclerView.setAdapter(mAdapter);
    mRecyclerView.setHasFixedSize(true); //Size of RV will not change
    // NOTE: Use default item animator 'canReuseUpdatedViewHolder()' will return true if
    // a Payload is provided. FlexibleAdapter is actually sending Payloads onItemChange.
    mRecyclerView.setItemAnimator(new DefaultItemAnimator());

    // Add FastScroll to the RecyclerView, after the Adapter has been attached the RecyclerView!!!
    FastScroller fastScroller = getView().findViewById(R.id.fast_scroller);
    fastScroller.addOnScrollStateChangeListener((MainActivity) getActivity());
    mAdapter.setFastScroller(fastScroller);

    mAdapter.setDisplayHeadersAtStartUp(true)
            .setStickyHeaders(true)
            .setOnlyEntryAnimation(true);

    SwipeRefreshLayout swipeRefreshLayout = getView().findViewById(R.id.swipeRefreshLayout);
    swipeRefreshLayout.setEnabled(true);
    mListener.onFragmentChange(swipeRefreshLayout, mRecyclerView, Mode.IDLE);

    // Add 1 Scrollable Header
    mAdapter.addScrollableHeader(new ScrollableUseCaseItem(
            getString(R.string.model_holders_use_case_title),
            getString(R.string.model_holders_use_case_description)));
}
 

@SuppressWarnings({"unchecked", "ConstantConditions"})
private void initializeRecyclerView() {
    // Initialize Adapter and RecyclerView
    // true = it makes use of stableIds, I strongly suggest to implement 'item.hashCode()'
    FlexibleAdapter.useTag("InstagramHeadersAdapter");
    mAdapter = new FlexibleAdapter<>(null, getActivity(), true);
    mAdapter.addListener(getActivity())
            .setAnimationOnForwardScrolling(true)
            .setAnimationOnReverseScrolling(true);
    mRecyclerView = getView().findViewById(R.id.recycler_view);
    mRecyclerView.setLayoutManager(createNewLinearLayoutManager());
    mRecyclerView.setAdapter(mAdapter);
    mRecyclerView.setHasFixedSize(true); //Size of RV will not change
    // NOTE: Use default item animator 'canReuseUpdatedViewHolder()' will return true if
    // a Payload is provided. FlexibleAdapter is actually sending Payloads onItemChange.
    mRecyclerView.setItemAnimator(new DefaultItemAnimator());
    // 24dpi as empty space between sections (each post)
    mRecyclerView.addItemDecoration(new FlexibleItemDecoration(getActivity())
            .withSectionGapOffset(24));

    // New empty views handling
    EmptyViewHelper.create(mAdapter, getView().findViewById(R.id.empty_view));

    mAdapter.setDisplayHeadersAtStartUp(true) //Show Headers at startUp!
            .setStickyHeaders(true) //Make headers sticky
            // Endless scroll with 1 item threshold
            .setLoadingMoreAtStartUp(true)
            .setEndlessScrollListener(this, new ProgressItem())
            .setEndlessScrollThreshold(1); //Default=1

    SwipeRefreshLayout swipeRefreshLayout = getView().findViewById(R.id.swipeRefreshLayout);
    swipeRefreshLayout.setEnabled(true);
    mListener.onFragmentChange(swipeRefreshLayout, mRecyclerView, Mode.IDLE);
}
 

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

    // Restore FAB button and icon
    initializeFab();

    FlexibleAdapter.useTag("AsyncFilterAdapter");
    // IMPORTANT! Upgrading to Support Library v26, stableIds must remain = false.
    // StableIds cause the entry animation not animate properly: alpha property of views
    // remain 1 (item not changed) while the entry animation requires the view to be invisible
    // when Swapping / Changing the Adapter.
    if (configure) {
        // Create configuration list
        DatabaseService.getInstance().createConfigurationDatabase(getResources());
        mAdapter = new FlexibleAdapter<>(DatabaseService.getInstance().getDatabaseList(),
                getActivity(), false);
    } else {
        // Create Database with custom size
        // N. of items (1000 items it's already a medium size)
        DatabaseService.getInstance().createEndlessDatabase(DatabaseConfiguration.size);
        mAdapter = new FlexibleAdapter<>(DatabaseService.getInstance().getDatabaseList(),
                getActivity(), false);
    }

    initializeRecyclerView();
    configure = !configure;
}
 

private void initializeRecyclerView(Bundle savedInstanceState) {
    // Initialize Adapter and RecyclerView
    // ExampleAdapter makes use of stableIds, I strongly suggest to implement 'item.hashCode()'
    FlexibleAdapter.useTag("EndlessScrollingAdapter");
    if (savedInstanceState != null) {
        mAdapter = new ExampleAdapter(DatabaseService.getInstance().getDatabaseList(), getActivity());
    } else {
        mAdapter = new ExampleAdapter(null, getActivity());
    }
    mAdapter.setAutoScrollOnExpand(true)
            //.setAnimateToLimit(Integer.MAX_VALUE) //Use the default value
            .setNotifyMoveOfFilteredItems(true) //When true, filtering on big list is very slow, not in this case!
            .setNotifyChangeOfUnfilteredItems(true) //true by default
            .setAnimationOnForwardScrolling(DatabaseConfiguration.animateOnForwardScrolling)
            .setAnimationOnReverseScrolling(true);
    mRecyclerView = getView().findViewById(R.id.recycler_view);
    mRecyclerView.setLayoutManager(createNewLinearLayoutManager());
    mRecyclerView.setAdapter(mAdapter);
    mRecyclerView.setHasFixedSize(true); //Size of RV will not change
    // NOTE: Use the custom FadeInDownAnimator for ALL notifications for ALL items,
    // but ScrollableFooterItem implements AnimatedViewHolder with a unique animation: SlideInUp!
    mRecyclerView.setItemAnimator(new FadeInDownItemAnimator());

    // Add FastScroll to the RecyclerView, after the Adapter has been attached the RecyclerView!!!
    FastScroller fastScroller = getView().findViewById(R.id.fast_scroller);
    fastScroller.addOnScrollStateChangeListener((MainActivity) getActivity());
    mAdapter.setFastScroller(fastScroller);

    // New empty views handling, to set after FastScroller
    EmptyViewHelper.create(mAdapter,
            getView().findViewById(R.id.empty_view),
            getView().findViewById(R.id.filter_view));

    mAdapter.setLongPressDragEnabled(true) //Enable long press to drag items
            .setHandleDragEnabled(true) //Enable drag using handle view
            .setSwipeEnabled(true); //Enable swipe items

    SwipeRefreshLayout swipeRefreshLayout = getView().findViewById(R.id.swipeRefreshLayout);
    swipeRefreshLayout.setEnabled(true);
    mListener.onFragmentChange(swipeRefreshLayout, mRecyclerView, Mode.IDLE);

    // EndlessScrollListener - OnLoadMore (v5.0.0)
    mAdapter.setLoadingMoreAtStartUp(savedInstanceState == null) //To call only if the list is empty
            //.setEndlessPageSize(3) //Endless is automatically disabled if newItems < 3
            //.setEndlessTargetCount(15) //Endless is automatically disabled if totalItems >= 15
            .setEndlessScrollThreshold(20) //Default=1
            .setEndlessScrollListener(this, mProgressItem)
            .setTopEndless(false);

    // Add 1 Header item
    ScrollableLayoutItem scrollHeader = new ScrollableLayoutItem("SLI");
    scrollHeader.setTitle("Endless Scrolling");
    scrollHeader.setSubtitle("...with ScrollableHeaderItem");
    mAdapter.addScrollableHeader(scrollHeader);
}
 

@SuppressWarnings({"ConstantConditions", "NullableProblems"})
private void initializeRecyclerView(Bundle savedInstanceState) {
    // Initialize Adapter and RecyclerView
    // ExampleAdapter makes use of stableIds, I strongly suggest to implement 'item.hashCode()'
    FlexibleAdapter.useTag("ExpandableSectionAdapter");
    mAdapter = new ExampleAdapter(DatabaseService.getInstance().getDatabaseList(), getActivity());
    // OnItemAdd and OnItemRemove listeners
    mAdapter.addListener(this);
    mAdapter.expandItemsAtStartUp()
            .setAutoCollapseOnExpand(false)
            .setAutoScrollOnExpand(true)
            .setAnimateToLimit(Integer.MAX_VALUE) //Size limit = MAX_VALUE will always animate the changes
            .setNotifyMoveOfFilteredItems(true) //When true, filtering on big list is very slow!
            .setAnimationOnForwardScrolling(DatabaseConfiguration.animateOnForwardScrolling)
            .setAnimationOnReverseScrolling(true);
    mRecyclerView = getView().findViewById(R.id.recycler_view);
    mRecyclerView.setLayoutManager(createNewLinearLayoutManager());
    mRecyclerView.setAdapter(mAdapter);
    mRecyclerView.setHasFixedSize(true); //Size of RV will not change
    // NOTE: Use default item animator 'canReuseUpdatedViewHolder()' will return true if
    // a Payload is provided. FlexibleAdapter is actually sending Payloads onItemChange.
    mRecyclerView.setItemAnimator(new DefaultItemAnimator());
    // Custom divider item decorator
    mRecyclerView.addItemDecoration(new FlexibleItemDecoration(getActivity())
            .addItemViewType(R.layout.recycler_expandable_header_item)
            .withOffset(4));

    // Add FastScroll to the RecyclerView, after the Adapter has been attached the RecyclerView!!!
    FastScroller fastScroller = getView().findViewById(R.id.fast_scroller);
    fastScroller.addOnScrollStateChangeListener((MainActivity) getActivity());
    mAdapter.setFastScroller(fastScroller);

    // New empty views handling, to set after FastScroller
    EmptyViewHelper.create(mAdapter,
            getView().findViewById(R.id.empty_view),
            getView().findViewById(R.id.filter_view));

    mAdapter.setLongPressDragEnabled(true) //Enable long press to drag items
            .setHandleDragEnabled(true) //Enable handle drag
            //.setDisplayHeadersAtStartUp(true); //Show Headers at startUp: (not necessary if Headers are also Expandable AND expanded at startup)
            .setStickyHeaders(true);

    SwipeRefreshLayout swipeRefreshLayout = getView().findViewById(R.id.swipeRefreshLayout);
    swipeRefreshLayout.setEnabled(true);
    mListener.onFragmentChange(swipeRefreshLayout, mRecyclerView, Mode.IDLE);
}
 

@SuppressWarnings({"ConstantConditions", "NullableProblems"})
private void initializeRecyclerView(Bundle savedInstanceState) {
    // Get the Database list
    List<AbstractFlexibleItem> items = DatabaseService.getInstance().getDatabaseList();

    // Initialize Adapter and RecyclerView
    // ExampleAdapter makes use of stableIds, I strongly suggest to implement 'item.hashCode()'
    FlexibleAdapter.useTag("SelectionModesAdapter");
    mAdapter = new ExampleAdapter(items, getActivity());
    mAdapter.setNotifyChangeOfUnfilteredItems(true) //true is the default! This will rebind new item when refreshed
            .setMode(Mode.SINGLE);

    mRecyclerView = getView().findViewById(R.id.recycler_view);
    mRecyclerView.setLayoutManager(createNewLinearLayoutManager());
    mRecyclerView.setAdapter(mAdapter);
    mRecyclerView.setHasFixedSize(true); //Size of RV will not change
    // NOTE: Use default item animator 'canReuseUpdatedViewHolder()' will return true if
    // a Payload is provided. FlexibleAdapter is actually sending Payloads onItemChange.
    mRecyclerView.setItemAnimator(new DefaultItemAnimator());
    // Divider item decorator with DrawOver enabled
    mRecyclerView.addItemDecoration(new FlexibleItemDecoration(getActivity())
            .withDivider(R.drawable.divider, R.layout.recycler_simple_item)
            .withDrawOver(true));
    mRecyclerView.postDelayed(new Runnable() {
        @Override
        public void run() {
            Snackbar.make(getView(), "Selection SINGLE is enabled", Snackbar.LENGTH_SHORT).show();
        }
    }, 1500L);

    // Add FastScroll to the RecyclerView, after the Adapter has been attached the RecyclerView!!!
    FastScroller fastScroller = getView().findViewById(R.id.fast_scroller);
    fastScroller.setAutoHideEnabled(true);        //true is the default value!
    fastScroller.setAutoHideDelayInMillis(1000L); //1000ms is the default value!
    fastScroller.setMinimumScrollThreshold(70); //0 pixel is the default value! When > 0 it mimics the fling gesture
    fastScroller.addOnScrollStateChangeListener((MainActivity) getActivity());
    // The color (accentColor) is automatically fetched by the FastScroller constructor, but you can change it at runtime
    // fastScroller.setBubbleAndHandleColor(Color.RED);
    mAdapter.setFastScroller(fastScroller);

    SwipeRefreshLayout swipeRefreshLayout = getView().findViewById(R.id.swipeRefreshLayout);
    swipeRefreshLayout.setEnabled(true);
    mListener.onFragmentChange(swipeRefreshLayout, mRecyclerView, Mode.SINGLE);

    // Add 2 Scrollable Headers
    mAdapter.addUserLearnedSelection(savedInstanceState == null);
    mAdapter.addScrollableHeaderWithDelay(new ScrollableUseCaseItem(
            getString(R.string.selection_modes_use_case_title),
            getString(R.string.selection_modes_use_case_description)), 1200L, true
    );
}
 

@SuppressWarnings({"ConstantConditions", "NullableProblems"})
private void initializeRecyclerView(Bundle savedInstanceState) {
    // Initialize Adapter and RecyclerView
    // ExampleAdapter makes use of stableIds, I strongly suggest to implement 'item.hashCode()'
    FlexibleAdapter.useTag("HeadersSectionsAdapter");
    mAdapter = new ExampleAdapter(DatabaseService.getInstance().getDatabaseList(), getActivity());
    mAdapter.setNotifyMoveOfFilteredItems(true)
            .setAnimationOnForwardScrolling(DatabaseConfiguration.animateOnForwardScrolling);
    mRecyclerView = getView().findViewById(R.id.recycler_view);
    mRecyclerView.setAdapter(mAdapter);
    mRecyclerView.setLayoutManager(createNewLinearLayoutManager());
    mRecyclerView.setHasFixedSize(true); //Size of RV will not change
    // NOTE: Use default item animator 'canReuseUpdatedViewHolder()' will return true if
    // a Payload is provided. FlexibleAdapter is actually sending Payloads onItemChange.
    mRecyclerView.setItemAnimator(new DefaultItemAnimator());
    mRecyclerView.addItemDecoration(new FlexibleItemDecoration(getActivity())
            //.addItemViewType(R.layout.recycler_header_item, 8, 8, 8, 8)
            .addItemViewType(R.layout.recycler_simple_item, 0, 8, 0, 8)
            .withSectionGapOffset(24)
            .withEdge(true));

    // Add FastScroll to the RecyclerView, after the Adapter has been attached the RecyclerView!!!
    FastScroller fastScroller = getView().findViewById(R.id.fast_scroller);
    fastScroller.addOnScrollStateChangeListener((MainActivity) getActivity());
    mAdapter.setFastScroller(fastScroller);

    // New empty views handling, to set after FastScroller
    EmptyViewHelper.create(mAdapter,
            getView().findViewById(R.id.empty_view),
            getView().findViewById(R.id.filter_view),
            (EmptyViewHelper.OnEmptyViewListener) getActivity()); // Optional!!

    // More settings
    mAdapter.setLongPressDragEnabled(true)
            .setHandleDragEnabled(true)
            .setSwipeEnabled(true)
            .setStickyHeaderElevation(5)
            .setUnlinkAllItemsOnRemoveHeaders(true)
            // Show Headers at startUp, 1st call, correctly executed, no warning log message!
            .setDisplayHeadersAtStartUp(true)
            .setStickyHeaders(true);
    // Simulate developer 2nd call mistake, now it's safe, not executed, no warning log message!
    //.setDisplayHeadersAtStartUp(true)
    // Simulate developer 3rd call mistake, still safe, not executed, warning log message displayed!
    //.showAllHeaders();

    SwipeRefreshLayout swipeRefreshLayout = getView().findViewById(R.id.swipeRefreshLayout);
    swipeRefreshLayout.setEnabled(true);
    mListener.onFragmentChange(swipeRefreshLayout, mRecyclerView, Mode.IDLE);

    // Add 2 Scrollable Headers and 1 Footer
    mAdapter.addUserLearnedSelection(savedInstanceState == null);
    mAdapter.addScrollableHeaderWithDelay(new ScrollableUseCaseItem(
            getString(R.string.headers_sections_use_case_title),
            getString(R.string.headers_sections_use_case_description)), 900L, false);
    mAdapter.addScrollableFooter();
}
 

@SuppressWarnings({"ConstantConditions", "NullableProblems"})
private void initializeRecyclerView(Bundle savedInstanceState) {
    // Initialize Adapter and RecyclerView
    // ExampleAdapter makes use of stableIds, I strongly suggest to implement 'item.hashCode()'
    FlexibleAdapter.useTag("ExpandableMultiLevelAdapter");
    mAdapter = new ExampleAdapter(DatabaseService.getInstance().getDatabaseList(), getActivity());
    mAdapter.expandItemsAtStartUp()
            .setNotifyMoveOfFilteredItems(true)
            .setAutoCollapseOnExpand(false)
            .setMinCollapsibleLevel(1) //Auto-collapse only items with level >= 1 (avoid to collapse also sections!)
            .setAutoScrollOnExpand(true);
    mRecyclerView = getView().findViewById(R.id.recycler_view);
    mRecyclerView.setLayoutManager(createNewLinearLayoutManager());
    mRecyclerView.setAdapter(mAdapter);
    mRecyclerView.setHasFixedSize(true); //Size of RV will not change
    // NOTE: Use default item animator 'canReuseUpdatedViewHolder()' will return true if
    // a Payload is provided. FlexibleAdapter is actually sending Payloads onItemChange.
    mRecyclerView.setItemAnimator(new DefaultItemAnimator());

    // Add FastScroll to the RecyclerView, after the Adapter has been attached the RecyclerView!!!
    FastScroller fastScroller = getView().findViewById(R.id.fast_scroller);
    fastScroller.addOnScrollStateChangeListener((MainActivity) getActivity());
    mAdapter.setFastScroller(fastScroller);

    // New empty views handling, to set after FastScroller
    EmptyViewHelper.create(mAdapter,
            getView().findViewById(R.id.empty_view),
            getView().findViewById(R.id.filter_view));

    mAdapter.setLongPressDragEnabled(true) //Enable long press to drag items
            .setHandleDragEnabled(true) //Enable handle drag
            .setSwipeEnabled(true); //Enable swipe items
    //.setDisplayHeadersAtStartUp(true); //Show Headers at startUp: not necessary if Headers are also Expandable!

    mRecyclerView.addItemDecoration(new FlexibleItemDecoration(getActivity())
            .withSectionGapOffset(24));

    SwipeRefreshLayout swipeRefreshLayout = getView().findViewById(R.id.swipeRefreshLayout);
    swipeRefreshLayout.setEnabled(true);
    mListener.onFragmentChange(swipeRefreshLayout, mRecyclerView, Mode.IDLE);

    // Add 1 Scrollable Header
    mAdapter.addUserLearnedSelection(savedInstanceState == null);
}
 

@SuppressWarnings({"ConstantConditions", "NullableProblems"})
private void initializeRecyclerView(Bundle savedInstanceState) {
    // Initialize Adapter and RecyclerView
    // OverallAdapter makes use of stableIds, I strongly suggest to implement 'item.hashCode()'
    FlexibleAdapter.useTag("OverallAdapter");
    mAdapter = new OverallAdapter(getActivity());
    mAdapter.setOnlyEntryAnimation(true)
            .setAnimationInterpolator(new DecelerateInterpolator())
            .setAnimationInitialDelay(INITIAL_DELAY_300);

    // Prepare the RecyclerView and attach the Adapter to it
    mRecyclerView = getView().findViewById(R.id.recycler_view);
    mRecyclerView.setItemViewCacheSize(0); //Setting ViewCache to 0 (default=2) will animate items better while scrolling down+up with LinearLayout
    mRecyclerView.setLayoutManager(createNewStaggeredGridLayoutManager());
    mRecyclerView.setAdapter(mAdapter);
    mRecyclerView.setHasFixedSize(true); //Size of RV will not change
    mItemDecoration = new FlexibleItemDecoration(getActivity())
            .addItemViewType(R.layout.recycler_overall_item)
            .withOffset(8) // This helps when top items are removed!!
            .withEdge(true);
    mRecyclerView.addItemDecoration(mItemDecoration);

    // After Adapter is attached to RecyclerView
    mAdapter.setLongPressDragEnabled(true);
    mRecyclerView.postDelayed(new Runnable() {
        @Override
        public void run() {
            if (getView() != null) { //Fix NPE when closing app before the execution of Runnable
                Snackbar.make(getView(), "Long press drag is enabled", Snackbar.LENGTH_SHORT).show();
            }
        }
    }, 4000L);

    SwipeRefreshLayout swipeRefreshLayout = getView().findViewById(R.id.swipeRefreshLayout);
    swipeRefreshLayout.setEnabled(true);
    mListener.onFragmentChange(swipeRefreshLayout, mRecyclerView, Mode.IDLE);

    // Add 1 Scrollable Header
    scrollableUseCaseItem = new ScrollableUseCaseItem(
            getString(R.string.overall_use_case_title),
            getString(R.string.overall_use_case_description));
    // Delayed! So entry animation will perform together
    mAdapter.addScrollableHeaderWithDelay(scrollableUseCaseItem, INITIAL_DELAY_300, true);
}