viewpager轮播

package com.rong.viewpager;import java.util.ArrayList;import java.util.List;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.app.Activity;import android.support.v4.view.PagerAdapter;import android.support.v4.view.ViewPager;import android.support.v4.view.ViewPager.OnPageChangeListener;import android.view.View;import android.view.ViewGroup;import android.widget.ImageView;import android.widget.LinearLayout;import android.widget.LinearLayout.LayoutParams;public class MainActivity extends Activity {    private ViewPager vp;private LinearLayout ll;private int[] images={R.drawable.image1,R.drawable.image2,R.drawable.image3,R.drawable.image4,R.drawable.image5};private Handler handler=new Handler(){@Overridepublic void handleMessage(Message msg) {if(msg.what==0){int currentItem = vp.getCurrentItem();vp.setCurrentItem(++currentItem);handler.sendEmptyMessageDelayed(0, 2000);}}};private List<ImageView> list_oval;int lastIndex;@Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);                vp = (ViewPager) findViewById(R.id.vp);        ll = (LinearLayout) findViewById(R.id.ll);        initoval();        vp.setAdapter(new PagerAdapter() {@Overridepublic boolean isViewFromObject(View arg0, Object arg1) {// TODO Auto-generated method stubreturn arg0==arg1;}@Overridepublic int getCount() {// TODO Auto-generated method stubreturn Integer.MAX_VALUE;}@Overridepublic void destroyItem(ViewGroup container, int position,Object object) {container.removeView((View) object);}@Overridepublic Object instantiateItem(ViewGroup container, int position) {ImageView image = new ImageView(MainActivity.this);image.setBackgroundResource(images[position%images.length]);container.addView(image);return image;}});        //发送消息给handler        handler.sendEmptyMessageDelayed(0, 2000);                vp.setOnPageChangeListener(new OnPageChangeListener() {@Overridepublic void onPageSelected(int arg0) {for (int i = 0; i < list_oval.size(); i++) {if(i==arg0%images.length){list_oval.get(i).setImageResource(R.drawable.ischeck);}else{list_oval.get(i).setImageResource(R.drawable.uncheck);}}}@Overridepublic void onPageScrolled(int arg0, float arg1, int arg2) {// TODO Auto-generated method stub}@Overridepublic void onPageScrollStateChanged(int arg0) {// TODO Auto-generated method stub}});        }/** * 自定义小圆点 */private void initoval(){list_oval=new ArrayList<ImageView>();for (int i = 0; i < images.length; i++) {ImageView image=new ImageView(MainActivity.this);if(i==0){image.setImageResource(R.drawable.ischeck);}else{image.setImageResource(R.drawable.uncheck);}LayoutParams layoutParams=new LayoutParams(20, 20);layoutParams.setMargins(5, 0, 5, 0);ll.addView(image, layoutParams);list_oval.add(image);}}}/**适配器Adapters*/package com.bwie.adapter;import android.content.Context;import android.support.v4.view.PagerAdapter;import android.view.View;import android.view.ViewGroup;import android.widget.ImageView;public class MyVp_FragMyShow_Adapter extends PagerAdapter {private int [] int_image;private Context context;public MyVp_FragMyShow_Adapter(int[] int_image, Context context) {super();this.int_image = int_image;this.context = context;}@Overridepublic int getCount() {// TODO Auto-generated method stubreturn Integer.MAX_VALUE;}@Overridepublic boolean isViewFromObject(View arg0, Object arg1) {// TODO Auto-generated method stubreturn arg0==arg1;}@Overridepublic void destroyItem(ViewGroup container, int position, Object object) {container.removeView((View) object);}@Overridepublic Object instantiateItem(ViewGroup container, int position) {//创建一个ImageViewImageView image=new ImageView(context);//加载图片image.setBackgroundResource(int_image[position%int_image.length]);container.addView(image);return image;}}