本文实例为大家分享了Android控件ViewPager实现卡片翻动效果的具体代码，供大家参考，具体内容如下

先放一张效果图：

想要实现这样的效果其实并不是太难，需要对ViewPager的一些细节属性更深入的了解和认识，下面介绍下一个小demo的实现过程：

第一步、创建卡片viewpager适配器的itemview的布局文件：

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:background="@drawable/bitmap" android:gravity="center"> <ImageView android:id="@+id/home_viewpage_item_img" android:paddingBottom="@dimen/dp_82" android:paddingTop="@dimen/dp_82" android:paddingLeft="@dimen/dp_44" android:paddingRight="@dimen/dp_44" android:layout_width="match_parent" android:layout_height="match_parent" android:src="@drawable/ic_launcher" /></RelativeLayout>

第二步、创建适配器：

class CardAdapter(var context: Context) : PagerAdapter() { val horoscopestrImgs = intArrayOf(R.drawable.ic_launcher, R.drawable.ic_launcher, R.drawable.ic_launcher, R.drawable.ic_launcher, R.drawable.ic_launcher, R.drawable.ic_launcher, R.drawable.ic_launcher, R.drawable.ic_launcher, R.drawable.ic_launcher, R.drawable.ic_launcher, R.drawable.ic_launcher, R.drawable.ic_launcher) override fun isViewFromObject(view: View, `object`: Any): Boolean { return view === `object` } override fun getCount(): Int { return 12 * 30 } override fun instantiateItem(container: ViewGroup, position: Int): Any { val view = LayoutInflater.from(context).inflate(R.layout.home_viewpage_item, null) view.home_viewpage_item_img.setImageResource(horoscopestrImgs.get(position%12)) container.addView(view) return view } override fun destroyItem(container: ViewGroup, position: Int, `object`: Any) { container.removeView(`object` as View) }}

第三步、创建放viewpager控件的布局文件：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:background="#fff" android:layout_height="match_parent" > <android.support.v4.view.ViewPager android:id="@+id/viewpager" android:layout_width="wrap_content" android:layout_height="match_parent" android:layout_centerInParent="true" android:overScrollMode="never" android:paddingBottom="@dimen/dp_240" android:paddingLeft="50dp" android:paddingRight="50dp" android:paddingTop="@dimen/dp_60" /></RelativeLayout>

第四步、创建viewpager滑动切换动画效果：

class CardTransformer(var context: Context) :ViewPager.PageTransformer{ val TAG = "CardTransformer" private val MAX_SCALE = 1.0f private val MIN_SCALE = 0.85f//0.85f var animator:ObjectAnimator?=null override fun transformPage(page: View, position: Float) { //设置了内间距 有0.15的偏差 var pos=position -0.15.toFloat() if ( pos <= 1) { val scaleFactor = MIN_SCALE + (1 - Math.abs(pos)) * (MAX_SCALE - MIN_SCALE) page.scaleX = scaleFactor //缩放效果 if (pos > 0) { page.translationX = -scaleFactor * 2 } else if (pos < 0 && pos > -1) { page.translationX = scaleFactor * 2 } page.scaleY = scaleFactor } else { page.scaleX = MIN_SCALE page.scaleY = MIN_SCALE } }}

第五步、开始调用实现卡片效果的关键代码：

class MainActivity : Activity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main7) //设置ViewPager中两页之间的距离 // viewpager?.setPageMargin(80) //自定义ViewPager的页面切换动画 viewpager?.setPageTransformer(false, CardTransformer(applicationContext)) //设置viewpager预加载的页数 viewpager?.offscreenPageLimit = 5 viewpager?.currentItem = 12 * 15 viewpager?.setAdapter(CardAdapter(this)) }}

到这里就基本实现了想要的卡片滑动切换和展示效果了！

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。