Navigation menu with expandable list items

Sample android app for navigation menu with expandable list items in material design.

Features

• Implemented using material design
• Easy to use
• Uses an expandable list view

Working

Layout

Add a toolbar in your layout.

<android.support.v7.widget.Toolbar 
	xmlns:android="http://schemas.android.com/apk/res/android"
	xmlns:local="http://schemas.android.com/apk/res-auto"
	android:id="@+id/toolbar"
	android:layout_width="match_parent"
	android:layout_height="wrap_content"
	android:minHeight="?attr/actionBarSize"
	android:background="?attr/colorPrimary"
	local:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
	local:popupTheme="@style/ThemeOverlay.AppCompat.Light" />	

Use a normal ExpandableListView in your drawer layout.

<ExpandableListView
	android:id="@+id/left_drawer"
	android:layout_width="240dp"
	android:layout_height="match_parent"
	android:layout_gravity="start"
	android:dividerHeight="1dp"
    android:divider="@color/list_divider"
	android:listSelector="@drawable/list_selector"
	android:background="@color/list_background" /> 

Adapter for expandable list view

Make a new class with BaseExpandableListAdapter

public class NavAdapter extends BaseExpandableListAdapter{

Attach the drawerList to ActionBarDrawerToggle object

actionBarDrawerToggle = new ActionBarDrawerToggle(this,drawer,toolbar,R.string.drawer_open,R.string.drawer_close )

Acknowledgments

• Ayush Pahwa
• AndroidHive introduction to material design for developing with material design
• PrashamTrivedi's repository The basic code for expandable list view
• Android Expandable List View Tutorial for editing the ExpandableListView