Source link: https://github.com/FutureMind/recycler-fast-scroll

Recycler Bubble

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.

Usage

Minimal working example

In your layout file:

<RelativeLayout xmlns:android="http://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.

Horizontal orientation

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

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.

Custom views

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

Download via Gradle:

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

License

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
  http://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.

Source link: https://github.com/FutureMind/recycler-fast-scroll

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