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先上效果一：
先上效果二：
先上效果三：
首先定义好viewPager控件，其次，是调用一行代码实现动画效果，
pager.setPageTransformer(true,new DepthPageTransformer());
前提是需要做一些准备操作的，且只有api3.0以上才可以有效。
注：因为属性动画是3.0以后才出现的，如果想在3.0以下的手机上实现动画，需要做一些更改，用nineoldandroids框架来代替属性动画。这里先不向下兼容了。如有想向下兼容的朋友，可以访问宏阳大神的博客，地址 http://blog.csdn.net/lmj623565791/article/details/40411921/
public class MainActivity extends AppCompatActivity { private ViewPager pager; private int[] mImgIds=new int[]{R.drawable.ic_guaid1,R.drawable.ic_guaid2,R.drawable.ic_guaid3,R.drawable.ic_guaid4}; private List<ImageView> mImages=new ArrayList<>(); @Override protected void onCreate(Bundle savedInstanceState) { requestWindowFeature(Window.FEATURE_NO_TITLE); super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); pager = ((ViewPager) findViewById(R.id.pager)); //为viewpager添加切换动画效果(api3.0以上)
//效果三 // pager.setPageTransformer(true,new ZoomOutPageTransformer());
//效果二
// pager.setPageTransformer(true,new RotateDownPageTransformer());//效果一pager.setPageTransformer(true,new DepthPageTransformer());
pager.setOffscreenPageLimit(3); pager.setAdapter(new PagerAdapter() { @Override public int getCount() { return mImgIds.length; } @Override public boolean isViewFromObject(View view, Object object) { return view==object; } @Override public Object instantiateItem(ViewGroup container, int position) { ImageView imageView=new ImageView(MainActivity.this); imageView.setImageResource(mImgIds[position]); container.addView(imageView); return imageView; } @Override public void destroyItem(ViewGroup container, int position, Object object) { container.removeView((ImageView)object); } }); }}public 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); } } }
public class ZoomOutPageTransformer implements ViewPager.PageTransformer { private static final float MIN_SCALE = 0.85f; private static final float MIN_ALPHA = 0.5f; 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 class RotateDownPageTransformer implements ViewPager.PageTransformer { private static final float ROT_MAX = 20.0f; private float mRot; public void transformPage(View view, float position) { Log.e("TAG", view + " , " + position + ""); if (position < -1) { // [-Infinity,-1) // This page is way off-screen to the left. view.setRotation( 0); } else if (position <= 1) // a页滑动至b页 ； a页从 0.0 ~ -1 ；b页从1 ~ 0.0 { // [-1,1] // Modify the default slide transition to shrink the page as well if (position < 0) { mRot = (ROT_MAX * position); view.setPivotX( view.getMeasuredWidth() * 0.5f); view.setPivotY( view.getMeasuredHeight()); view.setRotation( mRot); } else { mRot = (ROT_MAX * position); view.setPivotX( view.getMeasuredWidth() * 0.5f); view.setPivotY(view.getMeasuredHeight()); view.setRotation( mRot); } // Scale the page down (between MIN_SCALE and 1) // Fade the page relative to its size. } else { // (1,+Infinity] // This page is way off-screen to the right. view.setRotation( 0); } } }
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原文地址：http://blog.csdn.net/lzq520210/article/details/51352766
