Simple Gallery Application In Android

 
public class mygalleryactivity extends Activity {
 
 Integer[] imageIDs = {
   R.drawable.pic1,
   R.drawable.pic2,
   R.drawable.pic3,
   R.drawable.pic4,
   R.drawable.pic5,
   R.drawable.pic6,
   R.drawable.pic7
   };
 Gallery gallery;
   
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        gallery=(Gallery) findViewById(R.id.Gallery01);
        gallery.setAdapter(new ImageAdapter(this));
        gallery.setOnItemClickListener(new OnItemClickListener() 
        {

   public void onItemClick(AdapterView parent, View v, int position ,long id) {
    // TODO Auto-generated method stub
    Toast.makeText(getBaseContext(),
      "pic" + (position + 1) + "selected",
      Toast.LENGTH_SHORT).show();
    ImageView imageView =(ImageView) findViewById(R.id.image1);
    imageView.setImageResource(imageIDs[position]);
   }
  });    }
    
    public class ImageAdapter extends BaseAdapter
 {
  Context context;
  int itemBackground;
  
  public ImageAdapter(Context c)
  {
   context = c;
    //---setting the style---
   TypedArray a = obtainStyledAttributes(R.styleable.Gallery1);
   itemBackground = a.getResourceId(R.styleable.Gallery1_android_galleryItemBackground,0);
   a.recycle();
  }
    //---returns the number of images--- 
  public int getCount() 
  {
   System.out.println(imageIDs.length);
     return imageIDs.length;
     
  }
 //---returns the item---
  public Object getItem(int position)
  {
     return position;
  }
 //---returns the ID of an item---
  public long getItemId(int position) 
  {
     return position;
  }
 //---returns an ImageView view---
  
  public View getView(int position, View convertView,ViewGroup parent)
  {
    ImageView imageView;
    if (convertView == null) {
      imageView = new ImageView(context);
      imageView.setImageResource(imageIDs[position]);
      imageView.setScaleType(
      ImageView.ScaleType.FIT_XY);
      imageView.setLayoutParams(
        new Gallery.LayoutParams(150, 120));
    } else {
      imageView = (ImageView) convertView;
    }
    
 imageView.setBackgroundResource(itemBackground);
 return imageView;
  }}}