Viewpager 可自动滑动和手动滑动

【核心代码】

package org.wx.viewpager.test;

import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;


import android.app.Activity;
import android.os.Bundle;
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.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewGroup.LayoutParams;
import android.widget.ImageView;

public class ViewPagerTestActivity extends Activity {

private ImageView[] imageViews = null;
private ImageView imageView = null;
private ViewPager advPager = null;
private AtomicInteger what = new AtomicInteger(0);
private boolean isContinue = true;

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
initViewPager();
}

/**
* 设置广告栏的图片及切换效果
*/
private void initViewPager() {
advPager = (ViewPager) findViewById(R.id.adv_pager);
// 图片列表
List<View> advPics = new ArrayList<View>();
// 图片1
ImageView img1 = new ImageView(this);
img1.setBackgroundResource(R.drawable.advertising_default_1);
advPics.add(img1);
// 图片2
ImageView img2 = new ImageView(this);
img2.setBackgroundResource(R.drawable.advertising_default_2);
advPics.add(img2);
// 图片3
ImageView img3 = new ImageView(this);
img3.setBackgroundResource(R.drawable.advertising_default_3);
advPics.add(img3);
// 图片4
ImageView img4 = new ImageView(this);
img4.setBackgroundResource(R.drawable.advertising_default);
advPics.add(img4);
  
// group是R.layou.mainview中的负责包裹小圆点的LinearLayout.
ViewGroup group = (ViewGroup) findViewById(R.id.viewGroup);
imageViews = new ImageView[advPics.size()];

for (int i = 0; i < advPics.size(); i ) {
imageView = new ImageView(this);
imageView.setLayoutParams(new LayoutParams(20, 20));
imageView.setPadding(20, 0, 20, 0);
imageViews[i] = imageView;
if (i == 0) {
// 默认选中第一张图片
imageViews[i]
.setBackgroundResource(R.drawable.banner_dian_focus);
} else {
imageViews[i]
.setBackgroundResource(R.drawable.banner_dian_blur);
}
group.addView(imageViews[i]);
}

advPager.setAdapter(new AdvAdapter(advPics));
advPager.setOnPageChangeListener(new GuidePageChangeListener());
//按下时不继续定时滑动,弹起时继续定时滑动
advPager.setOnTouchListener(new View.OnTouchListener() {

@Override
public boolean onTouch(View v, MotionEvent event) {
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
case MotionEvent.ACTION_MOVE:
isContinue = false;
break;
case MotionEvent.ACTION_UP:
isContinue = true;
break;
default:
isContinue = true;
break;
}
return false;
}
});
// 定时滑动线程
new Thread(new Runnable() {

@Override
public void run() {
while (true) {
if (isContinue) {
viewHandler.sendEmptyMessage(what.get());
whatOption();
}
}
}

}).start();
}

/**
* 操作圆点轮换变背景
*/
private void whatOption() {
what.incrementAndGet();
if (what.get() > imageViews.length - 1) {
what.getAndAdd(-4);
}
try {
Thread.sleep(5000);
} catch (InterruptedException e) {

}
}

/**
* 处理定时切换广告栏图片的句柄
*/
private final Handler viewHandler = new Handler() {

@Override
public void handleMessage(Message msg) {
advPager.setCurrentItem(msg.what);
super.handleMessage(msg);
}

};

/** 指引页面改监听器 */
private final class GuidePageChangeListener implements OnPageChangeListener {

@Override
public void onPageScrollStateChanged(int arg0) {

}

@Override
public void onPageScrolled(int arg0, float arg1, int arg2) {

}

@Override
public void onPageSelected(int arg0) {
for (int i = 0; i < imageViews.length; i ) {
imageViews[arg0]
.setBackgroundResource(R.drawable.banner_dian_focus);
if (arg0 != i) {
imageViews[i]
.setBackgroundResource(R.drawable.banner_dian_blur);
}
}

}

}

/**
* 广告栏PaperView 图片适配器
* 
* @author wx
* 
*/
private final class AdvAdapter extends PagerAdapter {
private List<View> views = null;

public AdvAdapter(List<View> views) {
this.views = views;
}

@Override
public void destroyItem(View arg0, int arg1, Object arg2) {
((ViewPager) arg0).removeView(views.get(arg1));
}

@Override
public void finishUpdate(View arg0) {

}

@Override
public int getCount() {
return views.size();
}

@Override
public Object instantiateItem(View arg0, int arg1) {
((ViewPager) arg0).addView(views.get(arg1), 0);
return views.get(arg1);
}

@Override
public boolean isViewFromObject(View arg0, Object arg1) {
return arg0 == arg1;
}

@Override
public void restoreState(Parcelable arg0, ClassLoader arg1) {

}

@Override
public Parcelable saveState() {
return null;
}

@Override
public void startUpdate(View arg0) {

}

}

}