Simple Gallery View Example in android

Demo18Activity.java

package ps.demo18;
import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.BaseAdapter;
import android.widget.Gallery;
import android.widget.ImageView;
import android.widget.Toast;

public class Demo18Activity extends Activity implements OnItemClickListener {
    /** 
     * www.master-gtu.blogspot.com
     * pankaj sharma(8460479175), 
     * chavda vijay(8460420769) 
     */
 Gallery gv;
 int images[]={R.drawable.photo1,R.drawable.photo2,R.drawable.photo3,R.drawable.photo4};
 ImageView img;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        gv=(Gallery) findViewById(R.id.gallery1);
        
        img=(ImageView) findViewById(R.id.imageView1);
        
        gv.setAdapter(new arrayAdapter(this));
        
        gv.setOnItemClickListener(this);
    }
    private class arrayAdapter extends BaseAdapter
    {
     int images[]={R.drawable.photo1,R.drawable.photo2,R.drawable.photo3,R.drawable.photo4};
     Context c;
     public arrayAdapter(Context context)
     {
      c=context;
     }
  @Override
  public int getCount() {
   // TODO Auto-generated method stub
   return images.length;
  }

  @Override
  public Object getItem(int arg0) {
   // TODO Auto-generated method stub
   return arg0;
  }

  @Override
  public long getItemId(int arg0) {
   // TODO Auto-generated method stub
   return arg0;
  }

  @Override
  public View getView(int arg0, View arg1, ViewGroup arg2) {
   // TODO Auto-generated method stub
   
   ImageView img = new ImageView(c);
   img.setImageResource(images[arg0]);
   img.setLayoutParams(new Gallery.LayoutParams(100, 200));
   
   return img;
  }
    }
 @Override
 public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
  // TODO Auto-generated method stub

  img.setImageResource(images[arg2]);
  Toast.makeText(this, images[arg2]+" selected", 1).show();
 }
}