Lesson 6: List Control and Adapters

List Controls

These are type of components that can display multiple values or a collection of data.

Spinner

It displays only one item but let the user choose among several items

ScrollView

It enables users to scroll a list of views occupy more space than the physical display

ListView

A built-in Android View that displays items in a vertical list.

GridView

It shows its child in a table form, the table is scrollable and we can set the number of column to show.

Gallery

It shows item in a horizontally scrolling way.

RecyclerView

[Blank] makes it easy to efficiently display large sets of data. You supply the data and define each item looks, and the [Blank] library dynamically creates the elements they’re needed.

RecyclerView.ViewHolder

You define the RecyclerView view holder by extending [blank]

RecyclerView.Adapter

You define the RecyclerView adapter by extending [blank]

LayoutManager

The items in RecyclerView are arranged by a [blank] class

LinearLayoutManager

[blank] arranges the items in one dimensional list.

GridlayoutManager

[blank] arranges all items in a two-dimensional grid

Vertically

In a grid layout, If the grid is arranged [blank], all elements in each row has the same height and width but different rows have different heights

Horizontally

In a grid layout, If the grid is arranged [blank], all elements in each column has the same height and width but different columns can have different widths

StaggeredGridLayoutManager

[blank] is similar to GridLayoutManager but items in a row or column may be offset from each other

Adapter

The [blank] is an interface whose implementations is to manage the data and to provide the appropriate child view according to the data that has to be displayed.

AdapterView

Can be used to display large set of data efficiently in form of List or Grid etc., provided to it by an adapter.

ViewGroup

In a adpter, the AdapterView extends [blank’ so they both extend indirectly View class.

ArrayAdapter

Adapter with everything implemented for you, just pass in an array.

SimpleAdapter

Adapter that uses data stores in XML resources to build the list

CursorAdapter

An adapter that uses information stored in a SQLite database

getCount()

An adapter method, that returns number of items to be displayed

getItem(index)

An adapter method, that returns item on position index

getItemId(index)

An adapter method, that returns item Id on position index

getView(index)

An adapter method, that creates and populate a View from position index

BaseAdapter

This is the parent adapter for the rest of the Adapters.