第一步，先写布局文件
<com.main.util.SlideShowViewandroid:id="@+id/slideshowView"android:layout_width="fill_parent"android:layout_height="300dp"android:layout_centerHorizontal="true"/>
第二步，，java代码
package com.main.util;import java.util.ArrayList;import java.util.List;import java.util.concurrent.Executors;import java.util.concurrent.ScheduledExecutorService;import java.util.concurrent.TimeUnit;import com.main.R;import android.content.Context;import android.graphics.drawable.Drawable;import android.os.Handler;import android.os.Message;import android.os.Parcelable;import android.support.v4.view.PagerAdapter;import android.support.v4.view.ViewPager;import android.support.v4.view.ViewPager.OnPageChangeListener;import android.util.AttributeSet;import android.view.LayoutInflater;import android.view.View;import android.widget.FrameLayout;import android.widget.ImageView;import android.widget.ImageView.ScaleType;public class SlideShowView extends FrameLayout {//轮播图图片数量private final static int IMAGE_COUNT = 5;//自动轮播的时间间隔private final static int TIME_INTERVAL = 5;//自动轮播启用开关private final static boolean isAutoPlay = true;//自定义轮播图的资源IDprivate int[] imagesResIds;//放轮播图片的ImageView 的listprivate List<ImageView> imageViewsList;//放圆点的View的listprivate List<View> dotViewsList;private ViewPager viewPager;//当前轮播页private int currentItem = 0;//定时任务private ScheduledExecutorService scheduledExecutorService;//Handlerprivate Handler handler = new Handler(){@Overridepublic void handleMessage(Message msg) {// TODO Auto-generated method stubsuper.handleMessage(msg);viewPager.setCurrentItem(currentItem);}};public SlideShowView(Context context) {this(context,null);// TODO Auto-generated constructor stub}public SlideShowView(Context context, AttributeSet attrs) {this(context, attrs, 0);// TODO Auto-generated constructor stub}public SlideShowView(Context context, AttributeSet attrs, int defStyle) {super(context, attrs, defStyle);// TODO Auto-generated constructor stubinitData();initUI(context);if(isAutoPlay){startPlay();}}/*** 开始轮播图切换*/private void startPlay(){scheduledExecutorService = Executors.newSingleThreadScheduledExecutor();scheduledExecutorService.scheduleAtFixedRate(new SlideShowTask(), 1, 4, TimeUnit.SECONDS);}/*** 停止轮播图切换*/private void stopPlay(){scheduledExecutorService.shutdown();}/*** 初始化相关Data*/private void initData(){imagesResIds = new int[]{//图片数据R.drawable.p1,R.drawable.p2,};imageViewsList = new ArrayList<ImageView>();dotViewsList = new ArrayList<View>();}/*** 初始化Views等UI*/private void initUI(Context context){LayoutInflater.from(context).inflate(R.layout.imageviewpager, this, true);for(int imageID : imagesResIds){ImageView view = new ImageView(context);view.setImageResource(imageID);view.setScaleType(ScaleType.FIT_XY);imageViewsList.add(view);}dotViewsList.add(findViewById(R.id.v_dot1));dotViewsList.add(findViewById(R.id.v_dot2));viewPager = (ViewPager) findViewById(R.id.viewPager);viewPager.setFocusable(true);viewPager.setAdapter(new MyPagerAdapter());viewPager.setOnPageChangeListener(new MyPageChangeListener());}/*** 填充ViewPager的页面适配器* @author caizhiming*/private class MyPagerAdapter extends PagerAdapter{@Overridepublic void destroyItem(View container, int position, Object object) {// TODO Auto-generated method stub//((ViewPag.er)container).removeView((View)object);((ViewPager)container).removeView(imageViewsList.get(position));}@Overridepublic Object instantiateItem(View container, int position) {// TODO Auto-generated method stub((ViewPager)container).addView(imageViewsList.get(position));return imageViewsList.get(position);}@Overridepublic int getCount() {// TODO Auto-generated method stubreturn imageViewsList.size();}@Overridepublic boolean isViewFromObject(View arg0, Object arg1) {// TODO Auto-generated method stubreturn arg0 == arg1;}@Overridepublic void restoreState(Parcelable arg0, ClassLoader arg1) {// TODO Auto-generated method stub}@Overridepublic Parcelable saveState() {// TODO Auto-generated method stubreturn null;}@Overridepublic void startUpdate(View arg0) {// TODO Auto-generated method stub}@Overridepublic void finishUpdate(View arg0) {// TODO Auto-generated method stub}}/*** ViewPager的监听器* 当ViewPager中页面的状态发生改变时调用* @author caizhiming*/private class MyPageChangeListener implements OnPageChangeListener{boolean isAutoPlay = false;@Overridepublic void onPageScrollStateChanged(int arg0) {// TODO Auto-generated method stubswitch (arg0) {case 1:// 手势滑动，空闲中isAutoPlay = false;break;case 2:// 界面切换中isAutoPlay = true;break;case 0:// 滑动结束，即切换完毕或者加载完毕// 当前为最后一张，此时从右向左滑，则切换到第一张if (viewPager.getCurrentItem() == viewPager.getAdapter().getCount() – 1 && !isAutoPlay) {viewPager.setCurrentItem(0);}// 当前为第一张，此时从左向右滑，则切换到最后一张else if (viewPager.getCurrentItem() == 0 && !isAutoPlay) {viewPager.setCurrentItem(viewPager.getAdapter().getCount() – 1);}break;}}@Overridepublic void onPageScrolled(int arg0, float arg1, int arg2) {// TODO Auto-generated method stub}@Overridepublic void onPageSelected(int pos) {// TODO Auto-generated method stubcurrentItem = pos;for(int i=0;i < dotViewsList.size();i++){if(i == pos){((View)dotViewsList.get(pos)).setBackgroundResource(R.drawable.dot_black);}else {((View)dotViewsList.get(i)).setBackgroundResource(R.drawable.dot_white);}}}}/***执行轮播图切换任务*@author caizhiming*/private class SlideShowTask implements Runnable{@Overridepublic void run() {// TODO Auto-generated method stubsynchronized (viewPager) {currentItem = (currentItem+1)%imageViewsList.size();handler.obtainMessage().sendToTarget();}}}/*** 销毁ImageView资源，回收内存* @author caizhiming*/private void destoryBitmaps() {for (int i = 0; i < IMAGE_COUNT; i++) {ImageView imageView = imageViewsList.get(i);Drawable drawable = imageView.getDrawable();if (drawable != null) {//解除drawable对view的引用drawable.setCallback(null);}}}}
劝君更尽一杯酒，西出阳关无故人。
