Could you please tell me difference between ArrayAdapter , BaseAdapter and ListAdapter.
BaseAdapter as the name suggests, is a base class for all the adapters.
When you are extending the Base adapter class you need to implement all the methods like getCount(), getId() etc.
ArrayAdapter is a class which can work with array of data. You need to override only getview() method.
ListAdapter is a an interface implemented by concrete adapter classes.
BaseAdapter is an abstract class whereas ArrayAdapter and ListAdapter are the concrete classes.
ArrayAdapter and ListAdapter classes are developed since in general we deal with the array data sets and list data sets.
ListAdapter
It is an interface that extended Adapter which is the bridge between a ListView and the data that backs the list.
BaseAdaper
Common base class of common implementation for an Adapter that can be used in both ListView (by implementing the specialized ListAdapter interface} and Spinner (by implementing the specialized SpinnerAdapter interface.
ArrayAdapter
A concrete BaseAdapter that is backed by an array of arbitrary objects.
Refer below links
来源：https://stackoverflow.com/questions/11628742/what-is-the-difference-between-arrayadapter-baseadapter-and-listadapter