Android Hello world example

 

Android Hello world example

Softwares Used

Eclipse 3.7
Java 1.6
Android SDK

Steps

1. Download and install Android SDK

( Available in http://developer.android.com/sdk/index.html)

2.Open SDK Manager (Start->Programs->Android SDK Tools) and download Android version

This example used Android 2.1 version

3. Install ADT Eclipse plugin in

Eclipse help menu->Install new software->Add repository with below url
https://dl-ssl.google.com/android/eclipse/

4. Create an Android Virtual Device (AVD)

In Eclipse tool bar we can see AVD Manager/ or Open it from Start->Programs->Android SDK Tools
In this example selected 2.1

5. Create an Android project in Eclipse

Here selected 2.1 version with blank activity (In this example i given activity name as PretechActivity)

6. Please see this project structure and Add TextView Object the Activity class onCreate method.

packagecom.example.pretechandroiddemo;

import android.os.Bundle;

importandroid.app.Activity;

import android.view.Menu;

importandroid.widget.TextView;

public class PretechActivity extends Activity {

       @Override

       public void onCreate(Bundle savedInstanceState) {

              super.onCreate(savedInstanceState);

              TextView view = new TextView(this);

              String s = "Hello world by Pretech Solutions";

              view.setText(s);

              setContentView(view);

       }

       @Override

       public booleanonCreateOptionsMenu(Menu menu) {

              getMenuInflater().inflate(R.menu.activity_pretech, menu);

              return true;

       }

}

7. Run as Android Application

We can see the emulator starting and creating apk file and installing in the console
Note: Some times emulator will take long time to start, please wait for few minutes

[2012-09-25 01:31:46 - PretechAndroidDemo] ------------------------------

[2012-09-25 01:31:46 - PretechAndroidDemo] Android Launch!

[2012-09-25 01:31:46 - PretechAndroidDemo] adb is running normally.

[2012-09-25 01:31:46 - PretechAndroidDemo] Performing com.example.pretechandroiddemo.PretechActivity activity launch

[2012-09-25 01:31:46 - PretechAndroidDemo] Automatic Target Mode: launching new emulator with compatible AVD 'Pretech'

[2012-09-25 01:31:46 - PretechAndroidDemo] Launching a new emulator with Virtual Device 'Pretech'

[2012-09-25 01:31:47 - PretechAndroidDemo] New emulator found: emulator-5554

[2012-09-25 01:31:47 - PretechAndroidDemo] Waiting for HOME ('android.process.acore') to be launched...

[2012-09-25 01:33:15 - PretechAndroidDemo] HOME is up on device 'emulator-5554'

[2012-09-25 01:33:15 - PretechAndroidDemo] Uploading PretechAndroidDemo.apk onto device 'emulator-5554'

[2012-09-25 01:33:16 - PretechAndroidDemo] Installing PretechAndroidDemo.apk...

[2012-09-25 01:34:55 - PretechAndroidDemo] Success!

[2012-09-25 01:34:55 - PretechAndroidDemo] Starting activity

Output