how to create carousel view in android

MainActivity.java

public class MainActivity extends FragmentActivity {

    public final static int LOOPS = 1000;
    public static int FIRST_PAGE; // = count * LOOPS / 2;
    public final static float BIG_SCALE = 1.0f;
    public final static float SMALL_SCALE = 0.7f;
    public final static float DIFF_SCALE = BIG_SCALE - SMALL_SCALE;
    public MyPagerAdapter adapter;
    public static ViewPager pager;
    /*** variables for the View */
    public int coverUrl[];
    public int img_id[] =new int[] {0,1,2,3,4,5,6};
    public static int count;

    public static MainActivity mainActivityCtx;

    public static int currentPage = 0;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        coverUrl = new int[] { R.drawable.images_one, R.drawable.images_two,R.drawable.images_three,R.drawable.images_for,R.drawable.images_fiv,R.drawable.images_six,R.drawable.images_seven, };

        mainActivityCtx = this;
        pager = (ViewPager) findViewById(R.id.myviewpager);
        count = coverUrl.length;
        DisplayMetrics metrics = new DisplayMetrics();
        getWindowManager().getDefaultDisplay().getMetrics(metrics);
        int pageMargin = 0;
        pageMargin = (int) ((metrics.widthPixels / 4) * 2);
        pager.setPageMargin(-pageMargin);

        try {
            adapter = new MyPagerAdapter(this, this.getSupportFragmentManager());
            pager.setAdapter(adapter);
            adapter.notifyDataSetChanged();

            //FIRST_PAGE = count * LOOPS / 2;

            pager.setOnPageChangeListener(adapter);
            // Set current item to the middle page so we can fling to both
            // directions left and right
            pager.setCurrentItem(FIRST_PAGE); // FIRST_PAGE
            // pager.setFocusableInTouchMode(true);
            pager.setOffscreenPageLimit(3);
            // Set margin for pages as a negative number, so a part of next and
            // previous pages will be showed

        } catch (Exception e) {
            // TODO: handle exception
            e.printStackTrace();
        }
    }
}

MyFragment.java

public class MyFragment extends Fragment {
    public static Fragment newInstance(MainActivity context, int pos,
            float scale) {
        Bundle b = new Bundle();
        b.putInt("pos", pos);
        b.putFloat("scale", scale);
        return Fragment.instantiate(context, MyFragment.class.getName(), b);
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        if (container == null) {
            return null;
        }

        LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(400, 400);
        LinearLayout fragmentLL = (LinearLayout) inflater.inflate(R.layout.main_fragment,
                container, false);
        final int pos = this.getArguments().getInt("pos");
        //TextView tv = (TextView) fragmentLL.findViewById(R.id.text);

        //tv.setText("Image " + pos);

        final ImageView iv = (ImageView) fragmentLL.findViewById(R.id.pagerImg);
       
        iv.setLayoutParams(layoutParams);
        iv.setImageResource(MainActivity.mainActivityCtx.coverUrl[pos]);
        iv.setId(MainActivity.mainActivityCtx.img_id[pos]);
        iv.setPadding(15, 15, 15, 15);

        MyLinearLayout root = (MyLinearLayout) fragmentLL.findViewById(R.id.root);
        float scale = this.getArguments().getFloat("scale");
        root.setScaleBoth(scale);

        return fragmentLL;
    }
}

MyLinearLayout.java

public class MyLinearLayout extends LinearLayout {
    private float scale = MainActivity.BIG_SCALE;

    public MyLinearLayout(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public MyLinearLayout(Context context) {
        super(context);
    }

    public void setScaleBoth(float scale) {
        this.scale = scale;
        this.invalidate();

    }

    @Override
    protected void onDraw(Canvas canvas) {
        // The main mechanism to display scale animation, you can customize it
        // as your needs
        int w = this.getWidth();
        int h = this.getHeight();
        canvas.scale(scale, scale, w / 2, h / 2);

        super.onDraw(canvas);
    }

}

MyPagerAdapter.java

public class MyPagerAdapter extends FragmentPagerAdapter implements
        ViewPager.OnPageChangeListener {

    private MyLinearLayout cur = null;
    private MyLinearLayout next = null;
    private MainActivity context;
    private FragmentManager fm;
    private float scale;
    int pCount = 0;

    public MyPagerAdapter(MainActivity context, FragmentManager fm) {
        super(fm);
        this.fm = fm;
        this.context = context;
    }

    @Override
    public Fragment getItem(int position) {
        // make the first pager bigger than others
        try {
            if (position == MainActivity.FIRST_PAGE)
                scale = MainActivity.BIG_SCALE;
            else
                scale = MainActivity.SMALL_SCALE;

            position = position % MainActivity.count;

        } catch (Exception e) {
            // TODO: handle exception
        }
        return MyFragment.newInstance(context, position, scale);
    }

    @Override
    public int getCount() {
        int count = 0;
        try {
            count = 4 ;//MainActivity.count * MainActivity.LOOPS;
        } catch (Exception e) {
            // TODO: handle exception
            e.printStackTrace();
        }
        return count;
    }

    @Override
    public void onPageScrolled(int position, float positionOffset,
            int positionOffsetPixels) {
        try {
            if (positionOffset >= 0f && positionOffset <= 1f) {
                cur = getRootView(position);
                next = getRootView(position + 1);

                cur.setScaleBoth(MainActivity.BIG_SCALE- MainActivity.DIFF_SCALE * positionOffset);
                next.setScaleBoth(MainActivity.SMALL_SCALE+ MainActivity.DIFF_SCALE * positionOffset);

                pCount++;
            }
        } catch (Exception e) {
            // TODO: handle exception
            e.printStackTrace();
        }
    }

    @Override
    public void onPageSelected(int position) {
       
        //System.out.println("!!!!!!!!!!!"+position);
       
    }

    @Override
    public void onPageScrollStateChanged(int state) {

    }

    private MyLinearLayout getRootView(int position) {
        return (MyLinearLayout) fm
                .findFragmentByTag(this.getFragmentTag(position)).getView()
                .findViewById(R.id.root);
    }

    private String getFragmentTag(int position) {
        return "android:switcher:" + context.pager.getId() + ":" + position;
    }
}

activity.xml

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@android:color/white"
    android:orientation="vertical" >

    <android.support.v4.view.ViewPager
        android:id="@+id/myviewpager"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_gravity="center"
        android:layout_marginLeft="0dp"
        android:layout_marginRight="0dp"
        android:overScrollMode="never" />

</LinearLayout>

main_freagment.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center"
    android:orientation="vertical" >

    <com.your.MyLinearLayout
        android:id="@+id/root"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="@android:color/transparent"
        android:gravity="center"
        android:orientation="vertical" >

        <ImageView
            android:id="@+id/pagerImg"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:padding="10dp"
            android:src="@drawable/ic_launcher" />

         </com.your.MyLinearLayout>

</LinearLayout>