单页显示3个Item的ViewPager炫酷切换效果，适用于Banner等。

效果图

Rotate Y

Rotate Down

Rotate Up

Alpha

ScaleIn

ScaleIn + Alpha + Rotate Down

使用

###（1）引入

compile `com.zhy:magic-viewpager:1.0.1`

###（2）示例

布局文件

<FrameLayout android:layout_width="match_parent" android:layout_height="160dp" android:clipChildren="false" android:layout_centerInParent="true" android:background="#aadc71ff" > <android.support.v4.view.ViewPager android:id="@+id/id_viewpager" android:layout_width="match_parent" android:layout_marginLeft="60dp" android:clipChildren="false" android:layout_marginRight="60dp" android:layout_height="120dp" android:layout_gravity="center" > </android.support.v4.view.ViewPager></FrameLayout>

注意外层android:layout_centerInParent="true".（貌似其实没什么影响）

编码

mViewPager.setPageMargin(20);//设置page间间距，自行根据需求设置mViewPager.setOffscreenPageLimit(3);//>=3mViewPager.setAdapter...//写法不变//setPageTransformer 决定动画效果mViewPager.setPageTransformer(true, new RotateDownPageTransformer());

##目前可选动画

AlphaPageTransformer
RotateDownPageTransformer
RotateUpPageTransformer
RotateYTransformer
NonPageTransformer
ScaleInTransformer

动画间可以自由组合，例如：

mViewPager.setPageTransformer(true,new RotateDownPageTransformer(new AlphaPageTransformer(new ScaleInTransformer())));

需求：

1.一个页面显示三个item

2.viewpager无限循环

3.定时滑动

4.长条形小点

<?xml version="1.0" encoding="utf-8"?><FrameLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="wrap_content" android:background="#aadc71ff" android:clipChildren="false" tools:context="com.example.administrator.banner2.MainActivity"> <android.support.v4.view.ViewPager android:id="@+id/viewpager" android:layout_width="match_parent" android:layout_height="150dp" android:layout_gravity="center" android:layout_marginBottom="10dp" android:layout_marginLeft="30dp" android:layout_marginRight="30dp" android:layout_marginTop="10dp" android:clipChildren="false"></android.support.v4.view.ViewPager> <LinearLayout android:id="@+id/dotLayout" android:layout_width="match_parent" android:layout_height="10dp" android:layout_gravity="bottom" android:layout_marginBottom="10dp" android:gravity="center" android:orientation="horizontal"></LinearLayout></FrameLayout>import android.os.Bundle;import android.os.Handler;import android.support.v4.view.PagerAdapter;import android.support.v4.view.ViewPager;import android.support.v7.app.AppCompatActivity;import android.view.View;import android.view.ViewGroup;import android.widget.ImageView;import android.widget.LinearLayout;import android.widget.RelativeLayout;import com.zhy.magicviewpager.transformer.ScaleInTransformer;import java.util.Timer;import java.util.TimerTask;public class MainActivity extends AppCompatActivity { private ViewPager mViewPager; private PagerAdapter mAdapter; private LinearLayout dotLayout; private Timer timer; private Handler mHandler = new Handler(); private int prePosition = 0; int[] imgRes = {R.drawable.a, R.drawable.b, R.drawable.c, R.drawable.d, R.drawable.e, R.drawable.f, R.drawable.g, R.drawable.h, R.drawable.i}; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); mViewPager = (ViewPager) findViewById(R.id.viewpager); dotLayout = (LinearLayout) findViewById(R.id.dotLayout); initDots(); mViewPager.setPageMargin(20); mViewPager.setOffscreenPageLimit(3); mViewPager.setAdapter(mAdapter = new PagerAdapter() { @Override public Object instantiateItem(ViewGroup container, int position) { ImageView view = new ImageView(MainActivity.this); view.setScaleType(ImageView.ScaleType.FIT_XY); view.setImageResource(imgRes[position % imgRes.length]); container.addView(view); return view; } @Override public void destroyItem(ViewGroup container, int position, Object object) { container.removeView((View) object); } @Override public int getCount() { return Integer.MAX_VALUE; } @Override public boolean isViewFromObject(View view, Object o) { return view == o; } }); mViewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() { @Override public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) { } @Override public void onPageSelected(int position) { dotLayout.getChildAt(prePosition).setEnabled(false); dotLayout.getChildAt(position % imgRes.length).setEnabled(true); prePosition = position % imgRes.length; } @Override public void onPageScrollStateChanged(int state) { } }); mViewPager.setPageTransformer(true, new ScaleInTransformer()); if (null != timer) { timer.cancel(); } timer = new Timer(); timer.schedule(new TimerTask() { @Override public void run() { mHandler.post(new Runnable() { @Override public void run() { mViewPager.setCurrentItem(mViewPager.getCurrentItem() + 1); } }); } }, 0, 1000); } private void initDots() { if (null != dotLayout) { dotLayout.removeAllViews(); } for (int i = 0; i < imgRes.length; i++) { ImageView dot = new ImageView(this); dot.setEnabled(false); dot.setImageResource(R.drawable.dot); LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT); params.leftMargin = 10; dot.setLayoutParams(params); dotLayout.addView(dot); } dotLayout.getChildAt(0).setEnabled(true); }}<?xml version="1.0" encoding="utf-8"?><selector xmlns:android="http://schemas.android.com/apk/res/android"> <item android:state_enabled="true"> <shape android:shape="rectangle"> <size android:width="15dp" android:height="3dp"></size> <corners android:radius="10dp" /> <solid android:color="#ff0000" /> </shape> </item> <item android:state_enabled="false"> <shape android:shape="rectangle"> <size android:width="15dp" android:height="3dp"></size> <corners android:radius="10dp" /> <solid android:color="#ffffff" /> </shape> </item></selector>

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。