Hello Friends,,,, till now we had acquire knowledge on whats the android? and its architecture all now i am going to detail about the Core Building Blocks of Android that means Fundamental Blocks of Android they are :

• Activity
• View
• Intent
• Services
• Content Providers
• Fragments
• AndroidManifest.xml
• AVD (Android Virtual Device)

Activity: An Activity is a Class that represents a single Screen

               An Activity is implemented as a subclass of an Activity. Here is the Syntax :

             

  Public class MainActivity extends Activity{

       }

View : Anything that you see on screen is View that is UI Elements such as Buttons, Label ,                             Text Fields etc..,

Intent : Intent is mainly used to invoke the Components. It is mainly used for

• Start the Service
• Launch an activity
• Display a web page
• Display a list of Contacts
• Broadcast a message
• Dial a phone call etc.., Here is the Syntax

Intent i = new Intent(Intent.ACTION_VIEW);

i.setData(Uri.parse("http://www.acquireandroid.blogspot.in"));

startActivity(i);

Here i is the object creation for intent, this is the code to view the webpage which is mentioned in Uri.parse....

Services : Service is a background process that can run for Long Time
There are two types of services Local Service and Remote Service

• Local Service is accessed from within the application
• Remote Service is accessed remotely from other application running on the same device

Content Providers : Content Providers are used to share the data between application

A Content provider is implemented as a subclass of ContentProvider class and must implement a standard set of APIs that enable other applications to perform transactions... Here is the Syntax

Public class MyContentProvider extends ContentProvider

{

       public void onCreate()

          {

           }

}

Fragments : It is like a Parts of activity. An Activity can display one or more fragments on the screen at the same time. 

AndroidManifest.xml : It contains information about activities, content providers, permissions etc. It is like web.xml file in Java EE.

AVD (Android Virtual Device) : It is used to test the android application without the need for mobile or tablet etc. It can be created in different configuration to emulate different types of real devices.

In Future i will go through detailed about these Fundamental Blocks...that's all for today friends Happy learning... :-)