Hello World with Android

       Yeah, we have successfully set up the android environment. So what’s next? 

I think we can follow the same formalities even though it’s useless. 

Okay we can tell Hello to this World through android now.

  -        Open your eclipse and create a new Android project

  -        Give your own project name, application name, package name and activity name

  -        Choose the android platform and SDK version (preferably the latest versions)

  -        Once you are done click finish

  -        Now the android project would be created with auto generated class

Find the generated activity class. It should be like this by extending android.app.Activity

package com.example.helloandroid;

import android.app.Activity;
import android.os.Bundle;

public class HelloAndroid extends Activity {

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
    }
}

From Reference, 

    -   Activity is a single application entity that is used to perform actions.

    -   Application may have many separate activities

   -   But the user interacts with them one at a time 

    -   The onCreate() method will be called by the Android system when your Activity starts

    -   In onCreate() we can perform all initialization and UI setup.

Since the title is about Hello World, Im changing the onCreate() method as below

public void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       TextView tv = new TextView(this);
       tv.setText("Hello, World");
       setContentView(tv);
   }

               That’s it. Now run the project by Run as “Android Application” and wait to see your 

Hello World. By the way we have accomplished our mission.