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" />

In Activity/Fragment:

1. Make the Activity / Fragment implement

   • ExpandableListView.OnGroupClickListener
   • ExpandableListView.OnChildClickListener
   • ExpandableListView.OnGroupExpandListener

2. Usage

   private AnimatedExpandableListView mExpandableListView;
   private ExpandableListAdapter mExpandableListAdapter;
   private int lastExpandedPosition = -1;

   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);	

   @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

   @Override
   public View getRealChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {
   return null;
   }
   
   @Override
   public int getRealChildrenCount(int groupPosition) {
   return 0;
   }