With significant changes to recyclerview and stable jetpack compose being released, this project will no longer be maintained.

Provides fast scroll and section indexer for recycler view. Uses a different mechanism than similar libraries to provide smooth movement of scroller handle when scrolling the list. Can be used with vertical and horizontal RecyclerViews. You can style it or even use a custom layout and animations for your fast scroll handle and bubble.

In your layout file:

<RelativeLayout xmlns:android="https://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <android.support.v7.widget.RecyclerView
        android:id="@+id/recyclerview"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        />

    <com.futuremind.recyclerviewfastscroll.FastScroller
        android:id="@+id/fastscroll"
        android:orientation="vertical"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:layout_alignParentRight="true"/>

</RelativeLayout>

In Activity/Fragment:

        recyclerView = (RecyclerView) findViewById(R.id.recyclerview);
        fastScroller = (FastScroller) findViewById(R.id.fastscroll);
        recyclerView.setLayoutManager(new LinearLayoutManager(this));
        recyclerView.setAdapter(adapter);

        //has to be called AFTER RecyclerView.setAdapter()
        fastScroller.setRecyclerView(recyclerView);

In your RecyclerView.Adapter

        public class MyAdapter ... implements SectionTitleProvider{
            
            ...
            
            @Override
            public String getSectionTitle(int position) {
                //this String will be shown in a bubble for specified position
                return getItem(position).substring(0, 1);
            }
            
        }

Note: You have to populate your adapter with enough items for the FastScroll to show. I has an auto-hide mechanism in case there is nothing to scroll.

You can use this library with horizontal LayoutManager. To do it use android:orientation="horizontal" attribute:

    <com.futuremind.recyclerviewfastscroll.FastScroller
        android:id="@+id/fastscroll"
        android:orientation="horizontal"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"/>

Styling was introduced in version 0.1.5 with a limited set of styleable attributes. More are on their way.

You can style the attributes in the xml layout:

    <com.futuremind.recyclerviewfastscroll.FastScroller
           ...
           app:fastscroll__handleColor="#8f93d1"
           app:fastscroll__bubbleColor="#5e64ce"
           app:fastscroll__bubbleTextAppearance="@style/StyledScrollerTextAppearance"
           />

Or directly in the code:

         fastScroller.setBubbleColor(0xffff0000);
         fastScroller.setHandleColor(0xffff0000);
         fastScroller.setBubbleTextAppearance(R.style.StyledScrollerTextAppearance);

See the example code for more info.

You can set custom layouts and animations for your handle and bubble, using:

        myViewProvider = new MyScrollerViewProvider();
        fastScroller.setViewProvider(myViewProvider);

For more information, consult CustomScrollerViewProvider in the example code.

Download via Gradle:

compile 'com.futuremind.recyclerfastscroll:fastscroll:0.2.5'

Copyright 2015 Future Mind

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

   https://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.