ViewPager show next and before item preview on screen
You can use PagerTransformer to ViewPager :-
mViewPager.setPageTransformer(false, new ViewPager.PageTransformer() {
@Override
public void transformPage(View page, float position) {
// do transformation here
}
});
Use this link for complete tutorial :-
http://andraskindler.com/blog/2013/create-viewpager-transitions-a-pagertransformer-example/
Hope this help you :)
Finally, i did it :) I modify this answer Android - Carousel like widget which displays a portion of the left and right elements
You can look this code.
//pager settings
pager.setClipToPadding(false);
pager.setPageMargin(24);
pager.setPadding(48, 8, 48, 8);
pager.setOffscreenPageLimit(3);
pager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
@Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
Log.i("", "onPageScrolled: " + position);
CampaignPagerFragment sampleFragment = (CampaignPagerFragment) ((CampaignPagerAdapter) pager.getAdapter()).getRegisteredFragment(position);
float scale = 1 - (positionOffset * RATIO_SCALE);
// Just a shortcut to findViewById(R.id.image).setScale(scale);
sampleFragment.scaleImage(scale);
if (position + 1 < pager.getAdapter().getCount()) {
sampleFragment = (CampaignPagerFragment) ((CampaignPagerAdapter) pager.getAdapter()).getRegisteredFragment(position + 1);
scale = positionOffset * RATIO_SCALE + (1 - RATIO_SCALE);
sampleFragment.scaleImage(scale);
}
}
@Override
public void onPageSelected(int position) {
Log.i("", "onPageSelected: " + position);
}
@Override
public void onPageScrollStateChanged(int state) {
Log.i("", "onPageScrollStateChanged: " + state);
if (state == ViewPager.SCROLL_STATE_IDLE) {
CampaignPagerFragment fragment = (CampaignPagerFragment) ((CampaignPagerAdapter) pager.getAdapter()).getRegisteredFragment(pager.getCurrentItem());
fragment.scaleImage(1);
if (pager.getCurrentItem() > 0) {
fragment = (CampaignPagerFragment) ((CampaignPagerAdapter) pager.getAdapter()).getRegisteredFragment(pager.getCurrentItem() - 1);
fragment.scaleImage(1 - RATIO_SCALE);
}
if (pager.getCurrentItem() + 1 < pager.getAdapter().getCount()) {
fragment = (CampaignPagerFragment) ((CampaignPagerAdapter) pager.getAdapter()).getRegisteredFragment(pager.getCurrentItem() + 1);
fragment.scaleImage(1 - RATIO_SCALE);
}
}
}
});
//PagerAdapter
public class CampaignPagerAdapter extends FragmentStatePagerAdapter {
SparseArray<Fragment> registeredFragments = new SparseArray<Fragment>();
public CampaignPagerAdapter(FragmentManager fm) {
super(fm);
}
@Override
public int getCount() {
return 5;
}
@Override
public Fragment getItem(int position) {
return new CampaignPagerFragment();
}
@Override
public Object instantiateItem(ViewGroup container, int position) {
Fragment fragment = (Fragment) super.instantiateItem(container, position);
registeredFragments.put(position, fragment);
return fragment;
}
@Override
public void destroyItem(ViewGroup container, int position, Object object) {
registeredFragments.remove(position);
super.destroyItem(container, position, object);
}
public Fragment getRegisteredFragment(int position) {
return registeredFragments.get(position);
}
}
for ex: https://github.com/mrleolink/SimpleInfiniteCarousel..
Hello, One thing that is missing sampleFragment.scaleImage(scale); It is a method created in CampaignPagerFragment and it scale the fragment rootView..
e.g public void scaleImage(float scaleX)
{
rootView.setScaleY(scaleX);
rootView.invalidate();
}