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The source code is released under:
MIT License
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package com.daimajia.slider.library.Tricks; /*from w w w.j a v a 2 s . c o m*/ import android.os.Parcelable; import android.support.v4.view.PagerAdapter; import android.util.Log; import android.view.View; import android.view.ViewGroup; import com.daimajia.slider.library.SliderAdapter; /** * A PagerAdapter that wraps around another PagerAdapter to handle paging wrap-around. * Thanks to: https://github.com/antonyt/InfiniteViewPager */ public class InfinitePagerAdapter extends PagerAdapter { private static final String TAG = "InfinitePagerAdapter"; private static final boolean DEBUG = false; private SliderAdapter adapter; public InfinitePagerAdapter(SliderAdapter adapter) { this.adapter = adapter; } public SliderAdapter getRealAdapter(){ return this.adapter; } @Override public int getCount() { // warning: scrolling to very high values (1,000,000+) results in // strange drawing behaviour return Integer.MAX_VALUE; } /** * @return the {@link #getCount()} result of the wrapped adapter */ public int getRealCount() { return adapter.getCount(); } @Override public Object instantiateItem(ViewGroup container, int position) { if(getRealCount() == 0){ return null; } int virtualPosition = position % getRealCount(); debug("instantiateItem: real position: " + position); debug("instantiateItem: virtual position: " + virtualPosition); // only expose virtual position to the inner adapter return adapter.instantiateItem(container, virtualPosition); } @Override public void destroyItem(ViewGroup container, int position, Object object) { if(getRealCount() == 0){ return; } int virtualPosition = position % getRealCount(); debug("destroyItem: real position: " + position); debug("destroyItem: virtual position: " + virtualPosition); // only expose virtual position to the inner adapter adapter.destroyItem(container, virtualPosition, object); } /* * Delegate rest of methods directly to the inner adapter. */ @Override public void finishUpdate(ViewGroup container) { adapter.finishUpdate(container); } @Override public boolean isViewFromObject(View view, Object object) { return adapter.isViewFromObject(view, object); } @Override public void restoreState(Parcelable bundle, ClassLoader classLoader) { adapter.restoreState(bundle, classLoader); } @Override public Parcelable saveState() { return adapter.saveState(); } @Override public void startUpdate(ViewGroup container) { adapter.startUpdate(container); } /* * End delegation */ private void debug(String message) { if (DEBUG) { Log.d(TAG, message); } } }