本文实例讲述了Android开发使用Handler的PostDelayed方法实现图片轮播功能。分享给大家供大家参考，具体如下：

第一步：创建MainActivity类

public class BaseActivity extends ActionBarActivity {

private List mDatas;

private ViewPager mViewPager;

private boolean isRun = false;

private AutoRunTask mTask;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

mViewPager = new ViewPager(this);

mViewPager.setLayoutParams(new AbsListView.LayoutParams(LayoutParams.MATCH_PARENT, Util

.getDimen(R.dimen.home_pic_height)));

mViewPager.setAdapter(new HomePagerAdapter());

// 设置滑动的初始位置

mViewPager.setCurrentItem(1000 * mDatas.size());

mViewPager.setOnTouchListener(this);

mTask = new AutoRunTask();

mTask.start();

}

@Override

public boolean onTouch(View v, MotionEvent event) {

switch (event.getAction()) {

case MotionEvent.ACTION_DOWN:

mTask.stop();

break;

case MotionEvent.ACTION_UP:

case MotionEvent.ACTION_CANCEL:

mTask.start();

break;

default:

break;

}

return false; //viewpager必须是false,如果是true是就不能移动

}

}

第二步：创建无限循环的PagerAdaper

class HomePagerAdapter extends PagerAdapter {

// 使用此对imageView进行复用

private LinkedList convertViews = new LinkedList();

@Override

public int getCount() {

// return mPicUrls.size();

return Integer.MAX_VALUE; // 可以无线滑动

}

@Override

public boolean isViewFromObject(View arg0, Object arg1) {

return arg0 == arg1;

}

@Override

public void destroyItem(ViewGroup container, int position, Object object) {

if (object != null && object instanceof ImageView) {

ImageView imageView = (ImageView) object;

// 添加到集合里

convertViews.add(imageView);

container.removeView(imageView);

}

super.destroyItem(container, position, object);

}

@Override

public Object instantiateItem(ViewGroup container, int position) {

// position 因为无线大，所以

int index = position % mDatas.size();

ImageView imageView = null;

if (convertViews != null && convertViews.size() > 0) {

// 取出一个imageView

imageView = convertViews.remove(0);

} else {

imageView = new ImageView(Util.getContext());

}

String uri = HttpHelper.URL + "image?name=" + mDatas.get(index);

mBitmapUtils.display(imageView, uri);

container.addView(imageView);

return imageView;

}

}

第三步：使用handler创建轮播类

public class AutoRunTask extends Handler implements Runnable {

@Override

public void run() {

while (isRun) {

removeCallbacks(this);

int currentItem = mViewPager.getCurrentItem();

currentItem++;

mViewPager.setCurrentItem(currentItem);

postDelayed(this, 2000);

}

}

public void start() {

if (!isRun) {

removeCallbacks(this);

isRun = true;

postDelayed(this, 2000);

}

}

public void stop() {

if (isRun) {

isRun = false;

removeCallbacks(this);

}

}

}

希望本文所述对大家Android程序设计有所帮助。