Component : AnimatedExpandableListView
This document explains how to use the component

Classes to be Copied :
Copy the following classes from component folder

• AnimatedExpandableListView
• AnimatedExpandableListAdapter
• DummyView
• ExpandAnimation

• GroupInfo

  Note : Current classes are in the package com.avinash.uihelper, these can either be copied to specified package or
  change them as per requirement.

AnimatedExpandableListView : is used for creating ExpandableListView with Expand and Collapse Animations

Usage :

In Layout:

<com.avinash.uihelper.AnimatedExpandableListView
        android:id="@+id/expandable_lst"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="@android:color/white"
        android:choiceMode="singleChoice"
        android:divider="@android:color/transparent"
        android:groupIndicator="@null"
        android:scrollbars="none"
        android:textColor="@android:color/black" ></com.avinash.uihelper.AnimatedExpandableListView>

In Activity/Fragment:

1) Make the Activity / Fragment implement

* `ExpandableListView.OnGroupClickListener`
* `ExpandableListView.OnChildClickListener`
* `ExpandableListView.OnGroupExpandListener`

2) Usage

```java
private AnimatedExpandableListView mExpandableListView;
private ExpandableListAdapter mExpandableListAdapter;
private int lastExpandedPosition = -1;
```
```java
mExpandableListView = (AnimatedExpandableListView) findViewById(R.id.expandable_lst);
mExpandableListAdapter = new ExpandableListAdapter(this, mGroupList, mChildList);
mExpandableListView.setAdapter(mExpandableListAdapter);
mExpandableListView.setOnGroupClickListener(this);
mExpandableListView.setOnChildClickListener(this);
mExpandableListView.setOnGroupExpandListener(this);    
```
```java
@Override
public boolean onGroupClick(ExpandableListView parent, View v, int groupPosition, long id) {
    if (mExpandableListView.isGroupExpanded(groupPosition)) {
        mExpandableListView.collapseGroupWithAnimation(groupPosition);
    } else {
        mExpandableListView.expandGroupWithAnimation(groupPosition);
    }
    return true;
}
@Override
public boolean onChildClick(ExpandableListView parent, View v, int groupPosition, int childPosition, long id) {
    // handle click based on child position
    return false;
}
/**
* This is done in order to close the previously expanded group
* when clicked on a new group
*
*@param groupPosition
*/
@Override
public void onGroupExpand(int groupPosition) {
    if (lastExpandedPosition != -1
            && groupPosition != lastExpandedPosition) {
        mExpandableListView.collapseGroup(lastExpandedPosition);
    }
    lastExpandedPosition = groupPosition;
}
```

3) Adapter

* Extend your custom adapter with `AnimatedExpandableListAdapter`
* Implement the methods
```java
@Override
public View getRealChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {
return null;
}
@Override
public int getRealChildrenCount(int groupPosition) {
return 0;
}
```