Update readme, changelog and screenshoots

CHANGELOG.md

@@ -1,5 +1,28 @@
 # Changelog
 
+## 3.0.0 - 07/09/2019
+
+- Remove class `StatelessSection`
+- Add class `SectionAdapter`
+- Add class `SectionedRecyclerViewAdapterV2Compat`
+- Move inner class `EmptyViewHolder` to package `utils`
+
+### SectionedRecyclerViewAdapter class
+- Add method `getAdapterForSection`
+- Removed `notify*` and `get*Position*` methods
+- Remove `EmptyViewHolder` inner class 
+
+### SectionAdapter class
+- Add `notify*` and `get*Position*` methods from `SectionedRecyclerViewAdapter`
+
+### Section class
+- Remove method `onBindContentViewHolder`
+- Add overloaded methods `onBind*ViewHolder` with payloads as parameter
+- Change `getHeaderViewHolder`, `getFooterViewHolder`, `getLoadingViewHolder`, `getFailedViewHolder` and `getEmptyViewHolder` to throw `UnsupportedOperationException` instead of returning an `EmptyViewHolder` by default
+
+### SectionedRecyclerViewAdapterV2Compat 
+- Add `notify*` and `get*Position*` removed methods from `SectionedRecyclerViewAdapter`
+
 ## 2.1.0 - 09/06/2019
 
 - Set source and target compatibility to Java 8

README.md

@@ -7,14 +7,13 @@ An Adapter that allows a RecyclerView to be split into Sections with headers and
 [![codecov](https://codecov.io/gh/luizgrp/SectionedRecyclerViewAdapter/branch/master/graph/badge.svg)](https://codecov.io/gh/luizgrp/SectionedRecyclerViewAdapter)
 [![Android Arsenal](https://img.shields.io/badge/Android%20Arsenal-SectionedRecyclerViewAdapter-green.svg?style=true)](https://android-arsenal.com/details/1/3471)
 
-<img src="https://raw.githubusercontent.com/luizgrp/SectionedRecyclerViewAdapter/master/art/sc1.png" width="300" height="533" >
-<img src="https://raw.githubusercontent.com/luizgrp/SectionedRecyclerViewAdapter/master/art/sc4.png" width="300" height="533" >
-<br><br>
+![Linear](art/sc1.png)
+![Grid](art/sc4.png)
 
 In addition, each Section can have its state(Loading/Loaded/Failed/Empty) controlled individually.
 
-<img src="https://raw.githubusercontent.com/luizgrp/SectionedRecyclerViewAdapter/master/art/sc2.png" width="300" height="533" >
-<img src="https://raw.githubusercontent.com/luizgrp/SectionedRecyclerViewAdapter/master/art/sc3.png" width="300" height="533" >
+![Loading](art/sc2.png)
+![Loaded](art/sc3.png)
 
 ---
 
@@ -26,9 +25,13 @@ Add this to the `dependencies` section in your project-level **build.gradle** fi
 implementation 'io.github.luizgrp.sectionedrecyclerviewadapter:sectionedrecyclerviewadapter:x.y.z'
 ```
 
+Guide to upgrade to version 3.x [here](https://github.com/luizgrp/SectionedRecyclerViewAdapter/wiki/Upgrading-to-3.x)
+
+Latest version without AndroidX: `1.2.0`.
+
 ## Basic usage
 
-##### 1) Create a custom section class:
+##### 1) Create a custom Section class:
 
 ```java
 class MySection extends Section {
@@ -60,6 +63,12 @@ class MySection extends Section {
         // bind your view here
         itemHolder.tvItem.setText(itemList.get(position));
     }
+
+    @Override
+    public RecyclerView.ViewHolder getHeaderViewHolder(View view) {
+        // return an empty instance of ViewHolder for the headers of this section
+        return new EmptyViewHolder(view);
+    }
 }
 ```
 
@@ -96,20 +105,21 @@ recyclerView.setAdapter(sectionAdapter);
 
 You can find a demo app [here](app).
 
-<img src="https://raw.githubusercontent.com/luizgrp/SectionedRecyclerViewAdapter/master/art/demosc.png" width="300" height="533" >
+![Demo](art/demosc.png)
 
 ## Examples
 
 Please check the implementation of the examples:
 
 - [Section with Header](app/src/main/java/io/github/luizgrp/sectionedrecyclerviewadapter/demo/Example1Fragment.java)
 - [Section with Header and Footer](app/src/main/java/io/github/luizgrp/sectionedrecyclerviewadapter/demo/Example2Fragment.java)
+- [Section with States](app/src/main/java/io/github/luizgrp/sectionedrecyclerviewadapter/demo/Example3Fragment.java)
 - [Expandable Section](app/src/main/java/io/github/luizgrp/sectionedrecyclerviewadapter/demo/Example4Fragment.java)
 - [Grid Section with Header](app/src/main/java/io/github/luizgrp/sectionedrecyclerviewadapter/demo/Example5Fragment.java)
 - [Expandable Grid Section](app/src/main/java/io/github/luizgrp/sectionedrecyclerviewadapter/demo/Example6Fragment.java)
 - [SearchView with Sections](app/src/main/java/io/github/luizgrp/sectionedrecyclerviewadapter/demo/Example7Fragment.java)
 - [Animations](app/src/main/java/io/github/luizgrp/sectionedrecyclerviewadapter/demo/Example8Fragment.java)
-- [Section with States](app/src/main/java/io/github/luizgrp/sectionedrecyclerviewadapter/demo/Example3Fragment.java)
+- [Payloads](app/src/main/java/io/github/luizgrp/sectionedrecyclerviewadapter/demo/example9/Example9Fragment.java)
 
 ## Apps on Google Play using this library