Create a folder called "android" in the drive C. Goto http://code.google.com/android/download.html. Click on the android_sdk_windows... link, download and save it to c:\androi.

Unzip downloaded file.

Now, set your PATH environment variable by right click on My Computer, and select Properties. Under the Advanced tab, hit the Environment Variables button, and in the dialog that comes up, double-click on Path under System Variables. Add the full path to the tools/ directory to the path, in this case, it is: C:\android\android-sdk-windows-1.0_r1\tools. Then click OK , OK , OK.

Click on Start > All Programms > Accessories > Command prompt and type emulator, then hit ENTER , in a couple seconds the emulator will appear, please wait when it's starting up.

Goto http://developers.sun.com/downloads/

Choose Java SE (JDK) 6 link.

Click on the Download button

Click on the Download button

Select Platform, Language for your download, check into the box "I agree to ..." and then click on the button "Continue"

Click on the file name (jdk-6u10-windows-i586-p.exe) to start to download the Java SDK

Save it to C:\android

After it has finished downloading, you will have this file in your directory (C:\android). Double click on file that was downloaded to start install Java SDK.

Accept agreement. And click Next to start install.

Go to http://www.eclipse.org/downloads/ . Download and save it to drive C:\. The current version of Eclipse is 3.4.1

After it has finished downloading, you will have this file in your directory (C:\). Unzip this file.

Double-click on the file c:\eclipse\eclipse.exe to run Eclipse editor.

Click OK to Continue.

Start Eclipse.

If you are using a proxy, please go to Windows > Preferences > General > Network Connections, choose "Manual proxy configuration" and type your proxy address here. If you are using a direct internet connection, you do not need to do this step.

Click Help > Software Updates

Choose "Available Software" tab, then click on the button "Add Site ..."

Copy and paste this link into input box "Location": https://dl-ssl.google.com/android/eclipse/, click OK

Back in the Available Software view, you should see the plugin. "Android Developer Tools", and "Android Editors" should both be checked. The Android Editors feature is optional, but recommended. Then click on the button "Install ..."

Click on the button Next

Check the "I accept the terms of the license agreements" and click Finish.

Wait to Eclipse download the plugin

Eclipse will ask to restart, click on the button Yes

After restart, update your Eclipse preferences to point to the SDK directory:

1. Select Window > Preferences... to open the Preferences panel.

2. Select Android from the left panel. If you get a dialog says: "Could not find folder 'tool' inside SDK ...", just click on the button OK
3. For the SDK Location in the main panel, click Browse... and locate the SDK directory.
4. Click Apply, then OK.

 
    <p>package com.androidcore.hello;
 
 
 
    import android.app.Activity;
 
    import android.os.Bundle;
 
    import android.widget.TextView;
 
 
 
    public class HellWorld extends Activity {
 
    /** Called when the activity is first created. */
 
    @Override
 
    public void onCreate(Bundle savedInstanceState) {
 
    super.onCreate(savedInstanceState);
 
    //setContentView(R.layout.main);
 
    TextView tv = new TextView(this);
 
    tv.setText("Hello, Android");
 
    setContentView(tv);
 
    }
 
    }</p>
 

Then click on button Run.