package com.ifttt.sparklemotiondemo; import android.support.v4.view.PagerAdapter; import android.view.View; import android.view.ViewGroup; /** * Implementation of {@link PagerAdapter} that represents each page as a {@link View}. */ public abstract class ViewPagerAdapter extends PagerAdapter { /** * Get a View that displays the data at the specified position in the data set. * * @param position The position of the item within the adapter's data set of the item whose * view we want. * @param container The ViewPager that this view will eventually be attached to. * @return A View corresponding to the data at the specified position. */ protected abstract View getView(int position, ViewGroup container); /** * Determines whether a page View is associated with a specific key object as * returned by instantiateItem(ViewGroup, int). * * @param view Page View to check for association with object * @param object Object to check for association with view * @return true if view is associated with the key object object. */ @Override public final boolean isViewFromObject(View view, Object object) { return view == object; } /** * Create the page for the given position. * * @param container The containing View in which the page will be shown. * @param position The page position to be instantiated. * @return Returns an Object representing the new page. This does not need * to be a View, but can be some other container of the page. */ @Override public final Object instantiateItem(ViewGroup container, int position) { final View view = getView(position, container); if (view != null) { container.addView(view); } return view; } /** * Remove a page for the given position. * * @param container The containing View from which the page will be removed. * @param position The page position to be removed. * @param view The same object that was returned by instantiateItem(View, int). */ @Override public final void destroyItem(ViewGroup container, int position, Object view) { container.removeView((View) view); } }