ImagePagerFragment.java

package net.iubris.ulysses.ui.gallery;

import java.util.List;

import net.iubris.ulysses.R;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.view.ViewPager;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

public class ImagePagerFragment extends Fragment {
	
//	public static final int INDEX = 2;
	private List<String> imagesUrl;
	
	@Override
	public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
		View rootView = inflater.inflate(R.layout.fragment_details_gallery, container, false);
		/*ViewPager pager = (ViewPager) rootView.findViewById(R.id.gallery_pager);
		
		pager.setPageTransformer(false, new AlphaTransformer());
//		pager.setPageTransformer(false, new DepthPageTransformer());
		
		pager.setAdapter( new ImagePagerAdapter( getActivity(), imagesUrl ) );
		pager.setCurrentItem(0);*/
		return rootView;
	}
	
	public void setImagesUrl(List<String> imagesUrl) {
		this.imagesUrl = imagesUrl;
	}
	
	public static class AlphaTransformer implements ViewPager.PageTransformer {

        private static final float MIN_SCALE = 0.85f;
        private static final float MIN_ALPHA = 0.7f;

        @Override
        public void transformPage(View view, float position) {
            int pageWidth = view.getWidth();
            int pageHeight = view.getHeight();

            if (position < -1) { // [-Infinity,-1)
                // This page is way off-screen to the left.
                view.setAlpha(0);

            } else if (position <= 1) { // [-1,1]
                // Modify the default slide transition to shrink the page as well
                float scaleFactor = Math.max(MIN_SCALE, 1 - Math.abs(position));
                float vertMargin = pageHeight * (1 - scaleFactor) / 2;
                float horzMargin = pageWidth * (1 - scaleFactor) / 2;
                if (position < 0) {
                    view.setTranslationX(horzMargin - vertMargin / 2);
                } else {
                    view.setTranslationX(-horzMargin + vertMargin / 2);
                }

                // Scale the page down (between MIN_SCALE and 1)
                view.setScaleX(scaleFactor);
                view.setScaleY(scaleFactor);

                // Fade the page relative to its size.
                view.setAlpha(MIN_ALPHA +(scaleFactor - MIN_SCALE) /(1 - MIN_SCALE) * (1 - MIN_ALPHA));

            } else { // (1,+Infinity]
                // This page is way off-screen to the right.
                view.setAlpha(0);
            }
        }
    }
	
	public static class DepthPageTransformer implements ViewPager.PageTransformer {
	    private static final float MIN_SCALE = 0.75f;

	    public void transformPage(View view, float position) {
	        int pageWidth = view.getWidth();

	        if (position < -1) { // [-Infinity,-1)
	            // This page is way off-screen to the left.
	            view.setAlpha(0);

	        } else if (position <= 0) { // [-1,0]
	            // Use the default slide transition when moving to the left page
	            view.setAlpha(1);
	            view.setTranslationX(0);
	            view.setScaleX(1);
	            view.setScaleY(1);

	        } else if (position <= 1) { // (0,1]
	            // Fade the page out.
	            view.setAlpha(1 - position);

	            // Counteract the default slide transition
	            view.setTranslationX(pageWidth * -position);

	            // Scale the page down (between MIN_SCALE and 1)
	            float scaleFactor = MIN_SCALE+(1 - MIN_SCALE) * (1 - Math.abs(position));
	            view.setScaleX(scaleFactor);
	            view.setScaleY(scaleFactor);

	        } else { // (1,+Infinity]
	            // This page is way off-screen to the right.
	            view.setAlpha(0);
	        }
	    }
	}
}