在手机QQ上切换封面主题板块，以及在某些App Shop中，我们经常看见Gallery效果的影子，但Gallery以及被一起了，这里我们实现使用ViewPager实现Gallery效果

布局文件:

(注意，根布局和ViewPager都要使用android:clipChildren="false"，表示当显示内容区域超过控件区域，

是否裁剪内容区域的宽度和高度，以实现遮盖超出区域，默认是true)

<?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:id="@+id/gallery_viewpager_layout"android:clipChildren="false" android:orientation="vertical" ><android.support.v4.view.ViewPager android:id="@+id/gallery_viewpager"android:layout_width="match_parent"android:layout_height="match_parent"android:layout_gravity="center"  android:clipChildren="false"/>
</LinearLayout>

代码文件

public class ViewPagerGallery extends Activity {private ViewPager mGalleryViewPager;private LinearLayout mViewPagerContainer;private int pagerWidth = 0;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.viewpager_gallery);mGalleryViewPager = (ViewPager)findViewById(R.id.gallery_viewpager);  mViewPagerContainer = (LinearLayout)findViewById(R.id.gallery_viewpager_layout);  pagerWidth =  (int) (getResources().getDisplayMetrics().widthPixels*3.0f/5.0f);mGalleryViewPager.measure(0, 0);LayoutParams lp = mGalleryViewPager.getLayoutParams();if(lp==null){lp = new LayoutParams(pagerWidth,LayoutParams.MATCH_PARENT);}else{lp.width = pagerWidth;}mGalleryViewPager.setLayoutParams(lp);//设置页面宽度为屏幕的3/5mGalleryViewPager.setOffscreenPageLimit(4);  //设置ViewPager至多缓存4个Pager页面，防止多次加载mGalleryViewPager.setPageMargin(50);  //设置Pager之间的间距mGalleryViewPager.setAdapter(new GalleryPagerAdapter()); mGalleryViewPager.setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener(){@Overridepublic void onPageScrolled(int position, float positionOffset,int positionOffsetPixels) {super.onPageScrolled(position, positionOffset, positionOffsetPixels);if (mViewPagerContainer != null) {  mViewPagerContainer.invalidate();  //更新超出区域页面，否则会出现页面缓存，导致页面效果不佳}  }});  }private class GalleryPagerAdapter extends PagerAdapter{@Overridepublic int getCount() {return 6;}@Overridepublic boolean isViewFromObject(View view, Object obj){return view==obj;}@Overridepublic void destroyItem(ViewGroup container, int position, Object object) {((ViewPager)container).removeView((ImageView)object); }@Overridepublic Object instantiateItem(ViewGroup container, int position) {int resId = getResources().getIdentifier("img0".concat(String.valueOf(position)), "drawable", getPackageName());ImageView imageView = createImageView(resId);((ViewPager)container).addView(imageView, position); return imageView;}public ImageView createImageView(int resId){ImageView iv = new ImageView(ViewPagerGallery.this);LayoutParams lp = iv.getLayoutParams();if(lp==null){lp = new LayoutParams(pagerWidth, LayoutParams.MATCH_PARENT);}else{lp.width = pagerWidth;lp.height = LayoutParams.MATCH_PARENT;}iv.setScaleType(ScaleType.FIT_CENTER);iv.setImageResource(resId);iv.setLayoutParams(lp);return iv;}}
}

Try doing it;