Describe android Activities in brief.

Describe android Activities in brief.



Activity provides the user interface. When you create an android application in eclipse through the wizard it asks you the name of the activity. Default name is MainActivity. You can provide any name according to the need. Basically it is a class (MainActivity) that is inherited automatically from Activity class. Mostly, applications have oneor more activities; and the main purpose of an activity is to interact with the user. Activity goes through a numberof stages, known as an activity's life cycle.

Example:

packagecom.example.careerride; //Application name careerride

importandroid.os.Bundle; // Default packages
importandroid.app.Activity; // Default packages
importandroid.view.Menu;

public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
@Override
publicbooleanonCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}

When you run the application onCreate method is called automatically.

Comments

Popular posts from this blog

Examine the collapse of Han. What factors explain how this occurred? How influential in Han Dynasty on Chinese History?

JAD Advantages and Disadvantages

Summarize effective communication strategies in organizational hierarchies, and review the role and relevance of the organizational grapevine