ViewPager and PagerTabStrip Demo In Android

ViewPagerAdapter.java

/* main.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.view.ViewPager xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/viewpager"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:background="@drawable/background" >

    <android.support.v4.view.PagerTabStrip
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="top" />
</android.support.v4.view.ViewPager>

*/

//ViewPager Adapter


public class ViewPagerAdapter extends PagerAdapter {

 // ----------------------------------------------------------------

 private Gallery gallery_disc, gallery_fest, gallery_combo;
 private ImageView selectedImageView;
 private ImageView leftArrowImageView;
 private ImageView rightArrowImageView;
 private int discPos, festPos, comboPos = 0;

 private List<String> drawable, d1, d2, d3;

 private GalleryImageAdapter disc_adapter, fest_adapter, combo_adapter;

 TextView tvOfferName_disc, tvDesc_disc, tvItems_disc, tvDiscount_disc;
 TextView tvOfferName_fest, tvDesc_fest, tvItems_fest, tvDiscount_fest;
 TextView tvOfferName_combo, tvDesc_combo, tvItems_combo, tvDiscount_combo;

 String discOffer[][];
 String comboOffer[][];
 String festOffer[][];
 String temp = "% Discount on Following Items:";

 ProgressDialog pd;
 // --------------------------------------

 private static String[] titles = new String[] { "Sport", "Music",
   "Games" };
 private final Context context;
 private int[] scrollPosition = new int[titles.length];

 public ViewPagerAdapter(Context context) {
  this.context = context;

  for (int i = 0; i < titles.length; i++) {
   scrollPosition[i] = 0;
  }
 }

 @Override
 public String getPageTitle(int position) {
  return titles[position];
 }

 @Override
 public int getCount() {
  return titles.length;
 }

 @Override
 public Object instantiateItem(View pager, final int position) {

  //Instantiate your all controls here
  LinearLayout llmain=new LinearLayout(context);
  
  ((ViewPager) pager).addView(llmain, 0);

  return llmain;
 }

 @Override
 public void destroyItem(View pager, int position, Object view) {

  ((ViewPager) pager).removeView((LinearLayout) view);
 }

 @Override
 public boolean isViewFromObject(View view, Object object) {

  return view.equals(object);
 }

 @Override
 public void finishUpdate(View view) {

 }

 @Override
 public void restoreState(Parcelable p, ClassLoader c) {

  if (p instanceof ScrollState) {
   scrollPosition = ((ScrollState) p).getScrollPos();
  }
 }

 @Override
 public Parcelable saveState() {

  return new ScrollState(scrollPosition);
 }

 @Override
 public void startUpdate(View view) {

 }

}

//To Maintain Scroll State after each Swipe

public class ScrollState implements Parcelable
{
        private int[] scrollPos;
        
        public static Parcelable.Creator<ScrollState> CREATOR = new Parcelable.Creator<ScrollState>()
        {

                @Override
                public ScrollState createFromParcel( Parcel source )
                {
                        int size = source.readInt();
                        int[] scrollPos = new int[ size ];
                        source.readIntArray( scrollPos );
                        return new ScrollState( scrollPos );
                }

                @Override
                public ScrollState[] newArray( int size )
                {
                        return new ScrollState[ size ];
                }
        };
        public ScrollState( int[] scrollPos )
        {
                this.scrollPos = scrollPos;
        }

        @Override
        public int describeContents()
        {
                return 0;
        }

        @Override
        public void writeToParcel( Parcel dest, int flags )
        {
                dest.writeInt( scrollPos.length );
                dest.writeIntArray( scrollPos );
        }

        public int[] getScrollPos()
        {
                return scrollPos;
        }
}