Tools & Technologies used in this article :

  1. JDK 1.6

  2. Eclipse 3.7

  3. Android SDK

1. Create Android Project

Select from the menu File --> New --> Other --> Android --> Android Application Project (say 'AndroidHello') and click Next button.

Android Application Project

 

2. Configure Project Settings

Enter Application, Project and Package Name. Select 'Minimum Required SDK' (lowest version of Android that this app supports), 'Target SDK' (highest version of Android with which this application has been tested), 'Compile With' (platform version against which this application will be compiled with) and 'Theme' (Android UI style) from the corresponding theme. To make it simple you can leave the dropdown value as it is. Click Next button

Configure Android Project Settings

Click Next button

Configure Android Project Settings

 

3. Configure App Launcher Icon

Choose your App icon and configure as per your requirement. For demonstration purpose, I have changed few settings as shown below

Configure App Launcher Icon

 

4. Create Activity

Choose an activity template (say 'BlankActivity') and click Next button.

Create Activity

Enter 'Activity Name' (say 'HelloActivity') and click Finish button.

Configure Activity

If Finish button is not enabled and Next is enabled that means required dependencies (Supporting library) are not installed. In this case click Next button and hit 'Install/Upgrade' button to install or upgrade required dependencies.

Install dependencies

Finally click Finish button.

 

5. Overall Project Structure

Android project will be created with some default files as shown below

Overall Project Structure

'android_hello.xml' (layout) will be opened using 'Android Common XML Editor'. Here we can build UI by simply dragging and dropping UI components from the Palette.

Android Common XML Editor

 

6. Code

'hello_world' resource string contains the message 'Hello world!' which will be shown on launching of the application.

File : strings.xml

'activity_hello.xml' is the layout built using 'Android Common XML Editor'. Instead of using a hard-coded string value ('Hello world!') in '<TextView>' element, the "@string/hello_world" value refers to a string resource defined in strings.xml.

File : activity_hello.xml

For this application we do not require to change anything in the generated activity code.

File : HelloActivity.java

 

7. Run Configuration

Right click on the project and from the context menu select 'Run As' --> 'Run Configurations..'

Run Configurations

If there is no Android Virtual Device (AVD) already created, then click Manager button to create one.

Create Anroid Virtual Device

Configure AVD as shown below and click OK button.

Configure AVD

 

8. Run Application

Right click on the project and from the context menu select 'Run As' --> 'Android Application'.

 

9. Output

Eclipse ADT will start the AVD and launch your application with 'Hello world!' message on the screen.

Android Hello world

Click home icon in the emulator and click the launcher icon to find your application. There you'll see the app icon which we have configured at step #3.

Android Hello world app icon

 

Download Source Code

SrcCodes : AndroidHello.zip

 

References