What is ExpandableListView?

Android ExpandableListView is a view that shows items in a vertically scrolling two-level list. It differs from a ListView by allowing two levels which are groups that can be easily expanded and collapsed by touching to view and their respective children items.

What is expandable list view in android?

In Android, ExpandableListView is a View that shows items in a vertically scrolling two level list. Different from the listview by allowing two level groups which can individually be expanded to show its children. Each group can be expanded or collapsed individually to show or hide its children items.

How do you show an expandable list?

In order to create an expandable list view, we need three xml layout files. First one is for main listview, 2nd one for list view group item and 3rd one is for list view child item. Open your activity_main. xml and add ExpandableListView element.

How do I create an expandable list in navigation drawer?

If you want to achieve above behavior to your NavigationDrawer you can follow below steps:

1. You have to add Expandable listview to your NavigationView.
2. Create Header View.
3. Create Child View.
4. Extend BaseExpandableListAdapter.
5. Set Adapter in MainActivity.

What is recycler view in Android?

RecyclerView is the ViewGroup that contains the views corresponding to your data. It’s a view itself, so you add RecyclerView into your layout the way you would add any other UI element. After the view holder is created, the RecyclerView binds it to its data. You define the view holder by extending RecyclerView.

What is a ListView in android?

Android ListView is a ViewGroup that is used to display the list of items in multiple rows and contains an adapter that automatically inserts the items into the list. The main purpose of the adapter is to fetch data from an array or database and insert each item that placed into the list for the desired result.

How do I make my Recyclerview expandable?

Steps To Create Expandable Recyclerview

1. Adding Dependencies.
2. Prepare data for the recyclerview.
3. Design Header & child items layout for expandable recyclerview.
4. set data into expandable recyclerview.

What is sub menu android?

Creating Submenus A submenu is a menu that the user can open by selecting an item in another menu. You can also use addSubMenu() to dynamically add a SubMenu to an existing Menu. This returns the new SubMenu object, to which you can add submenu items, using add(). Explore Android Sample Resumes!

What is the use of Inflater in android?

What is an Inflater ? To summarize what the LayoutInflater Documentation says… A LayoutInflater is one of the Android System Services that is responsible for taking your XML files that define a layout, and converting them into View objects. The OS then uses these view objects to draw the screen.

Why RecyclerView is used in android?

RecyclerView makes it easy to efficiently display large sets of data. You supply the data and define how each item looks, and the RecyclerView library dynamically creates the elements when they’re needed. As the name implies, RecyclerView recycles those individual elements.

What is the use of ArrayAdapter in Android?

You can use this adapter to provide views for an AdapterView , Returns a view for each object in a collection of data objects you provide, and can be used with list-based user interface widgets such as ListView or Spinner .

What is an expandable list view in Android?

Android ExpandableListView. Android ExpandableListView is a view that shows items in a vertically scrolling two-level list. It differs from a ListView by allowing two levels which are groups that can be easily expanded and collapsed by touching to view and their respective children items. ExpandableListViewAdapter in android loads…

Why does my arrow not change in expandable listview?

Trying to create an ExpandableListView. The initial view with the groups shows up fine. However, when I click the list item, my arrow does not change. See the images below.

How to change image in expandablelistview stack?

And then for your ExpandableListView use a GroupClickListener to change the image for ImageView programmatically, example : I am a bit late to the party but my requirement was something similar to this but something was different. Thanks for contributing an answer to Stack Overflow!

How is ChildInfo used in expandable list view?

ChildInfo is a model class used to set the name of the child item and the sequence of the child item from your main activity and then get the name and sequence within adapter class. Finally set the value to expandable list view.