Create “Hello World” application.

XML :
main.xml :
<?xml version="1.0" encoding="utf-8"?>
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"     android:layout_width="fill_parent"    android:layout_height="fill_parent"     android:background="@color/bgcolor" android:orientation="horizontal">
<TextView  android:layout_width="fill_parent"      android:layout_height="wrap_content"      android:text="@string/hello" android:layout_gravity="center_vertical" android:gravity="center_horizontal" android:textColor="@color/fgcolor"/> </LinearLayout>

JAVA :
FirstActivity.java :  
import android.app.Activity;
import android.os.Bundle; 
public class FirstActivity extends Activity 
{     
 public void onCreate(Bundle savedInstanceState) {       
 super.onCreate(savedInstanceState);        
setContentView(R.layout.main);    
}
}