A custom ViewGroup which is made by extending ReyclerView

FeaturedRecyclerView

FeaturedRecyclerView is a custom ViewGroup which is made by extending ReyclerView. As name suggest FeaturedRecyclerView, it features the first item which is at top (by setting its height to featuredItemHeight).

Attributes

featuredItemHeight: Height of first item.
defaultItemHeight : Height of other items.
offset : It is not a xml attribute but a parameter which is received in FeaturedRecyclerViewAdapter's method to animate the property of childs widget.

Diagramatic View

Concept

FutureWork

Horizontal Orientation support would be added.
Reference Points would be changed.

Basic Usage

Add below lines in build.gradle at app level.

compile 'com.github.developer-shivam:FeaturedRecyclerView:1.0.0'

For a working implementation, see /app folder

FeaturedRecyclerView featuredRecyclerView = (FeaturedRecyclerView) findViewById(R.id.featured_recycler_view);
FeatureLinearLayoutManager layoutManager = new FeatureLinearLayoutManager(this);
featuredRecyclerView.setLayoutManager(layoutManager);
CustomRecyclerViewAdapter adapter = new CustomRecyclerViewAdapter(this, dummyData);featuredRecyclerView.setAdapter(adapter);

You must use FeaturedLinearLayoutManager to avoid flickering.

<developer.shivam.featuredrecyclerview.FeaturedRecyclerView android:id="@+id/featured_recycler_view"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:featuredItemHeight="400dp"
    android:defaultItemHeight="200dp" />

Adavantages of using FeaturedRecyclerViewAdapter is that it contains two more methods which can be used to animate the properties of childs attribute (like textView fading).

    @Override
    public void onSmallItemResize(CustomRecyclerViewHolder holder, int position, float offset) {
       holder.tvHeading.setAlpha(offset / 100f);
    }

    @Override
    public void onBigItemResize(CustomRecyclerViewHolder holder, int position, float offset) {
       holder.tvHeading.setAlpha(offset / 100f);
    }