What's the role of adapters in Android?



Well adapters in Android are basically a bridge between the UI components and the data source that fill data into the UI Component
For example, Lists (UI Component) get populated by using a list adapter, from a data source array.

Let’s assume you want to display a list in your Android app. For this you will use the ListViewprovided by Android. ListViews don’t actually contain any data themselves. It’s just a UI element without data in it. You can populate your ListViews by using an Android adapter.
Adapter is an interface whose implementations provide data and control the display of that data. ListViews own adapters that completely control the ListView’s display. So adapters control the content displayed in the list as well as how to display it.

Comments

Post a Comment

Popular posts from this blog

Difference Between View and ViewGroup

View View  objects are the basic building blocks of User Interface(UI) elements in Android. View  is a simple rectangle box which responds to the user's actions. Examples are  EditText ,  Button ,  CheckBox  etc.. View  refers to the  android.view.View  class, which is the base class of all UI classes. ViewGroup ViewGroup  is the invisible container. It holds  View  and  ViewGroup For example,  LinearLayout  is the  ViewGroup  that contains Button(View), and other Layouts also. ViewGroup  is the base class for Layouts.
Read more

What is Context in Android

W hile developing Android applications, we all see and use the term context. But for most new programmers its a nightmare to resolve a context related error. This post helps you understand what context really means in Android Context in Android is an interface to global information about an application environment. This is an abstract class whose implementation is provided by the Android system. It allows access to application-specific resources and classes, as well as up-calls for application-level operations such as launching activities, broadcasting and receiving intents, etc. Every boss has an assistant to look after, to do all less important and time consuming tasks. If a file or a cup of coffee is needed, assistant is on the run. Some bosses barely know what’s going on in the office, so they ask their assistants regarding this too. They do some work themselves but for most other things they need help of their assistants. In this scenario, Boss –  is the  Androi...
Read more