Android使用ViewPager实现无限循环滑动及轮播(附源码)

MainActivity如下:

package cc.ww;import java.util.ArrayList;import android.app.Activity;import android.content.Context;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.support.v4.view.ViewPager;import android.view.MotionEvent;import android.view.View;import android.view.ViewGroup;import android.view.Window;import android.view.WindowManager;import android.view.View.OnTouchListener;import android.widget.ImageView;import android.widget.LinearLayout;/** * 原创作者: * 谷哥的小弟 http://blog.csdn.net/lfdfhl *  * Demo描述: * 1 ViewPager的自动轮播 * 2 同时支持手动切换ViewPager的Item * 3 解决了当图片小于三张ViewPager轮播时崩溃的问题 */public class MainActivity extends Activity {private Context mContext;private Handler mHandler;private Runnable mRunnable;private ViewPager mViewPager;private int viewPagerItemSize=0;private ImageView[] dotImageViews;private final int INTERVAL =1000 * 3;private ArrayList<Integer> mArrayList;private LinearLayout mDotsLinearLayout;private final static int SET_VIEWPAGER_ITEM=9527;private LauncherViewPagerAdapter mViewPagerAdapter;private PageChangeListenerImpl mPageChangeListenerImpl;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);//去掉状态栏requestWindowFeature(Window.FEATURE_NO_TITLE);getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,             WindowManager.LayoutParams.FLAG_FULLSCREEN);setContentView(R.layout.activity_main);init();}//初始化private void init() {initData();if(viewPagerItemSize>0){initDots();initViewPager();setAutoChangeViewPager();}}//准备ViewPager将显示的数据private void initData(){mContext = this;mArrayList=new ArrayList<Integer>();mArrayList.add(R.drawable.a);mArrayList.add(R.drawable.b);mArrayList.add(R.drawable.c);mArrayList.add(R.drawable.d);viewPagerItemSize=mArrayList.size();}//初始化ViewPagerprivate void initViewPager(){mViewPager = (ViewPager) findViewById(R.id.guide_viewpager);mViewPagerAdapter = new LauncherViewPagerAdapter(mContext);mViewPagerAdapter.setAdapterData(mArrayList);mViewPager.setAdapter(mViewPagerAdapter);int currentItem = Integer.MAX_VALUE/2 - Integer.MAX_VALUE/2 % viewPagerItemSize;mViewPager.setCurrentItem(currentItem);setdotImageViews(currentItem%viewPagerItemSize);mViewPager.setOnTouchListener(new OnTouchListener() {@Overridepublic boolean onTouch(View arg0, MotionEvent arg1) {mViewPager.requestDisallowInterceptTouchEvent(true);return false;}});}    //初始化底部小圆点    private void initDots() {    mDotsLinearLayout = (LinearLayout) findViewById(R.id.dotsLinearLayout);        dotImageViews = new ImageView[viewPagerItemSize];        for (int i = 0; i < dotImageViews.length; i++) {            LinearLayout layout = new LinearLayout(mContext);            ImageView imageView = new ImageView(mContext);            imageView.setLayoutParams(new ViewGroup.LayoutParams(20, 20));            if (i == 0) {                imageView.setBackgroundResource(R.drawable.guide_dot_white);            } else {                layout.setPadding(20, 0, 0, 0);                imageView.setBackgroundResource(R.drawable.guide_dot_black);            }            dotImageViews[i] = imageView;            layout.addView(imageView);            mDotsLinearLayout.addView(layout);        }    }            //开启ViewPager的自动轮播 @SuppressWarnings("deprecation")private void setAutoChangeViewPager() {mPageChangeListenerImpl = new PageChangeListenerImpl();mViewPager.setOnPageChangeListener(mPageChangeListenerImpl);mHandler = new Handler() {@Overridepublic void handleMessage(Message msg) {super.handleMessage(msg);switch (msg.what) {case SET_VIEWPAGER_ITEM:if (mViewPager != null && mViewPagerAdapter != null) {int currentItemIndex = mViewPager.getCurrentItem();int itemsCount = mViewPagerAdapter.getCount();if ((currentItemIndex + 1) < itemsCount) {mViewPager.setCurrentItem(currentItemIndex + 1, true);} else {mViewPager.setCurrentItem(0, false);}}break;}}};mRunnable = new Runnable() {@Overridepublic void run() {Message message = mHandler.obtainMessage();message.what = SET_VIEWPAGER_ITEM;mHandler.sendMessage(message);mHandler.removeCallbacks(mRunnable);mHandler.postDelayed(this, INTERVAL);}};mHandler.postDelayed(mRunnable, INTERVAL);}   //设置小圆点的显示 private void setdotImageViews(int selected){  for (int i = 0; i < dotImageViews.length; i++) {             dotImageViews[selected].setBackgroundResource(R.drawable.guide_dot_white);             if (selected != i) {                 dotImageViews[i].setBackgroundResource(R.drawable.guide_dot_black);             }         } }        //ViewPager翻页后更新小圆点的显示    private class PageChangeListenerImpl implements ViewPager.OnPageChangeListener {        @Override        public void onPageSelected(int selected) {         setdotImageViews(selected % viewPagerItemSize);        }        @Override        public void onPageScrolled(int arg0, float arg1, int arg2) {        }        @Override        public void onPageScrollStateChanged(int state) {                }    }        @Override    protected void onDestroy() {    super.onDestroy();    if(null!=mViewPager){    mViewPager.removeAllViews();            mViewPager = null;    }    }}

LauncherViewPagerAdapter如下:

package cc.ww;import java.util.ArrayList;import android.content.Context;import android.support.v4.view.PagerAdapter;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.ImageView;import android.widget.Toast;public class LauncherViewPagerAdapter extends PagerAdapter {private Context mContext;private ArrayList<Integer> pagesArrayList;private View itemView;public LauncherViewPagerAdapter(Context context) {this.mContext = context;}/** * 设置ViewPager将要显示的数据. * 当图片数量小于三张的时候,通过复制组拼数据 */public void setAdapterData(ArrayList<Integer> arrayList){pagesArrayList=arrayList;if (pagesArrayList.size()<1) {Toast.makeText(mContext, "ViewPager item size=0", Toast.LENGTH_LONG).show();}else if(pagesArrayList.size()<2){ pagesArrayList.add(pagesArrayList.get(0)); pagesArrayList.add(pagesArrayList.get(0)); pagesArrayList.add(pagesArrayList.get(0));}else if(pagesArrayList.size()<3){pagesArrayList.add(pagesArrayList.get(0));pagesArrayList.add(pagesArrayList.get(1));}System.out.println("-----> PagerAdapter中item的个数="+pagesArrayList.size());}@Overridepublic int getCount() { return Integer.MAX_VALUE;}@Overridepublic Object instantiateItem(ViewGroup container, int position) { if (pagesArrayList.size() > 0) {itemView=LayoutInflater.from(mContext).inflate(R.layout.guide_pager_adapter, null);     itemView.setFocusable(true);     ImageView imageView = (ImageView) itemView.findViewById(R.id.imageView);     imageView.setBackgroundResource(pagesArrayList.get(position%pagesArrayList.size()));     container.addView(itemView);     return itemView;         }         return null;}@Overridepublic boolean isViewFromObject(View arg0, Object arg1) {return arg0 == arg1;}@Overridepublic void destroyItem(ViewGroup container, int position, Object object) { container.removeView((View) object);}}

activity_main.xml如下:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent">    <android.support.v4.view.ViewPager        android:id="@+id/guide_viewpager"        android:layout_width="match_parent"        android:layout_height="match_parent" />    <LinearLayout        android:id="@+id/dotsLinearLayout"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignParentBottom="true"        android:layout_marginBottom="100px"        android:layout_centerHorizontal="true"        android:orientation="horizontal">    </LinearLayout>    </RelativeLayout>

guide_pager_adapter.xml如下:

<?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">    <ImageView        android:id="@+id/imageView"        android:layout_width="match_parent"        android:layout_height="match_parent" /></RelativeLayout>