Android 自动广告轮播图

近来项目忙完了，觉得自己的自动广告轮播蛮不错的，所以分享出来。先说说他的功能，第一能够实现自动轮播图片，第二可以修改自动更换广告条的小点默认是圆形的可以修改为小的正方向，同时还可以修改原点所在的位置居中居左居右，以及颜色改变等等。
1.代码如下:
/**
* Created by xiaomo on 2015/8/9.
*/
public class BannerLayout extends RelativeLayout {

private ViewPager pager;
//指示器容器
private LinearLayout indicatorContainer;private Drawable unSelectedDrawable;
private Drawable selectedDrawable;private int WHAT_AUTO_PLAY = 1000;private boolean isAutoPlay = true;private int itemCount;/**点选中的颜色**/
private int selectedIndicatorColor = 0xffff0000;
/**未选中的颜色**/
private int unSelectedIndicatorColor = 0x88888888;
/**点的类型 、oval(圆点)、rect(方形)**/
private Shape indicatorShape = Shape.oval;
/**选中小圆点高**/
private int selectedIndicatorHeight = 6;
/**选中小圆点宽**/
private int selectedIndicatorWidth = 6;
/**未选中小圆点高**/
private int unSelectedIndicatorHeight = 6;
/**未选中小圆点宽**/
private int unSelectedIndicatorWidth = 6;
/**scroll的持续时间**/
private Position indicatorPosition = Position.centerBottom;
/**滑动的时间*/
private int autoPlayDuration = 3000;
/**scroll的持续时间**/
private int scrollDuration = 1100;
/**滑动小圆点间距**/
private int indicatorSpace = 3;
/**滑动小圆点边缘的间距**/
private int indicatorMargin = 10;private enum Shape {rect, oval
}private enum Position {centerBottom,rightBottom,leftBottom,centerTop,rightTop,leftTop
}private OnBannerItemClickListener onBannerItemClickListener;private Handler handler = new Handler(new Handler.Callback() {@Overridepublic boolean handleMessage(Message msg) {if (msg.what == WHAT_AUTO_PLAY) {if(null == pager){return false;}pager.setCurrentItem(pager.getCurrentItem() + 1, true);handler.sendEmptyMessageDelayed(WHAT_AUTO_PLAY, autoPlayDuration);}return false;}
});public BannerLayout(Context context) {super(context);init(null, 0);
}public BannerLayout(Context context, AttributeSet attrs) {super(context, attrs);init(attrs, 0);
}public BannerLayout(Context context, AttributeSet attrs, int defStyleAttr) {super(context, attrs, defStyleAttr);init(attrs, defStyleAttr);
}private void init(AttributeSet attrs, int defStyle) {TypedArray array = getContext().obtainStyledAttributes(attrs, R.styleable.BannerLayoutStyle, defStyle, 0);selectedIndicatorColor = array.getColor(R.styleable.BannerLayoutStyle_selectedIndicatorColor, selectedIndicatorColor);unSelectedIndicatorColor = array.getColor(R.styleable.BannerLayoutStyle_unSelectedIndicatorColor, unSelectedIndicatorColor);int shape = array.getInt(R.styleable.BannerLayoutStyle_indicatorShape, Shape.oval.ordinal());for (Shape shape1 : Shape.values()) {if (shape1.ordinal() == shape) {indicatorShape = shape1;break;}}selectedIndicatorHeight = (int) array.getDimension(R.styleable.BannerLayoutStyle_selectedIndicatorHeight, selectedIndicatorHeight);selectedIndicatorWidth = (int) array.getDimension(R.styleable.BannerLayoutStyle_selectedIndicatorWidth, selectedIndicatorWidth);unSelectedIndicatorHeight = (int) array.getDimension(R.styleable.BannerLayoutStyle_unSelectedIndicatorHeight, unSelectedIndicatorHeight);unSelectedIndicatorWidth = (int) array.getDimension(R.styleable.BannerLayoutStyle_unSelectedIndicatorWidth, unSelectedIndicatorWidth);int position = array.getInt(R.styleable.BannerLayoutStyle_indicatorPosition, Position.centerBottom.ordinal());for (Position position1 : Position.values()) {if (position == position1.ordinal()) {indicatorPosition = position1;}}indicatorSpace = (int) array.getDimension(R.styleable.BannerLayoutStyle_indicatorSpace, indicatorSpace);indicatorMargin = (int) array.getDimension(R.styleable.BannerLayoutStyle_indicatorMargin, indicatorMargin);autoPlayDuration = array.getInt(R.styleable.BannerLayoutStyle_autoPlayDuration, autoPlayDuration);scrollDuration = array.getInt(R.styleable.BannerLayoutStyle_scrollDuration, scrollDuration);isAutoPlay = array.getBoolean(R.styleable.BannerLayoutStyle_isAutoPlay, isAutoPlay);array.recycle();//绘制未选中状态图形LayerDrawable unSelectedLayerDrawable;LayerDrawable selectedLayerDrawable;GradientDrawable unSelectedGradientDrawable;unSelectedGradientDrawable = new GradientDrawable();//绘制选中状态图形GradientDrawable selectedGradientDrawable;selectedGradientDrawable = new GradientDrawable();switch (indicatorShape) {case rect:unSelectedGradientDrawable.setShape(GradientDrawable.RECTANGLE);selectedGradientDrawable.setShape(GradientDrawable.RECTANGLE);break;case oval:unSelectedGradientDrawable.setShape(GradientDrawable.OVAL);selectedGradientDrawable.setShape(GradientDrawable.OVAL);break;}unSelectedGradientDrawable.setColor(unSelectedIndicatorColor);unSelectedGradientDrawable.setSize(unSelectedIndicatorWidth, unSelectedIndicatorHeight);unSelectedLayerDrawable = new LayerDrawable(new Drawable[]{unSelectedGradientDrawable});unSelectedDrawable = unSelectedLayerDrawable;selectedGradientDrawable.setColor(selectedIndicatorColor);selectedGradientDrawable.setSize(selectedIndicatorWidth, selectedIndicatorHeight);selectedLayerDrawable = new LayerDrawable(new Drawable[]{selectedGradientDrawable});selectedDrawable = selectedLayerDrawable;}//添加本地图片路径
public void setViewRes(List<Integer> viewRes) {List<View> views = new ArrayList<View>();itemCount = viewRes.size();//主要是解决当item为小于3个的时候滑动有问题，这里将其拼凑成3个以上if (itemCount < 1) {//当item个数0throw new IllegalStateException("item count not equal zero");} else if (itemCount < 2) {//当item个数为1views.add(getImageView(viewRes.get(0), 0));views.add(getImageView(viewRes.get(0), 0));views.add(getImageView(viewRes.get(0), 0));} else if (itemCount < 3) {//当item个数为2views.add(getImageView(viewRes.get(0), 0));views.add(getImageView(viewRes.get(1), 1));views.add(getImageView(viewRes.get(0), 0));views.add(getImageView(viewRes.get(1), 1));} else {for (int i = 0; i < viewRes.size(); i++) {views.add(getImageView(viewRes.get(i), i));}}setViews(views);
}*private SimpleDraweeView  getImageView (Integer res, final int position) {SimpleDraweeView  imageView = new SimpleDraweeView (getContext());imageView.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {if (onBannerItemClickListener != null) {onBannerItemClickListener.onItemClick(position);}}});*imageView.setHierarchy(AppContext.setHierarchy(imageView,R.mipmap.icon_notad));AppContext.loadPicture(imageView,res+"");return imageView;
}//添加网络图片路径
public void setViewUrls(List<String> urls) {List<View> views = new ArrayList<View>();itemCount = urls.size();//主要是解决当item为小于3个的时候滑动有问题，这里将其拼凑成3个以上if (itemCount < 1) {//当item个数0throw new IllegalStateException("item count not equal zero");} else if (itemCount < 2) { //当item个数为1views.add(getImageView(urls.get(0), 0));views.add(getImageView(urls.get(0), 0));views.add(getImageView(urls.get(0), 0));} else if (itemCount < 3) {//当item个数为2views.add(getImageView(urls.get(0), 0));views.add(getImageView(urls.get(1), 1));views.add(getImageView(urls.get(0), 0));views.add(getImageView(urls.get(1), 1));} else {for (int i = 0; i < urls.size(); i++) {views.add(getImageView(urls.get(i), i));}}setViews(views);
}private SimpleDraweeView getImageView(String url, final int position) {SimpleDraweeView imageView = new SimpleDraweeView(getContext());imageView.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {if (onBannerItemClickListener != null) {onBannerItemClickListener.onItemClick(position);}}});imageView.setHierarchy(AppContext.setHierarchy(imageView, R.mipmap.icon_notad));AppContext.loadPicture(imageView, url + "");return imageView;
}//添加任意View视图
private void setViews(final List<View> views) {//初始化pagerpager = new ViewPager(getContext());//添加viewpager到SliderLayoutaddView(pager);setSliderTransformDuration(scrollDuration);//初始化indicatorContainerindicatorContainer = new LinearLayout(getContext());indicatorContainer.setGravity(Gravity.CENTER_VERTICAL);LayoutParams params = new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);switch (indicatorPosition) {case centerBottom:params.addRule(RelativeLayout.CENTER_HORIZONTAL);params.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);break;case centerTop:params.addRule(RelativeLayout.CENTER_HORIZONTAL);params.addRule(RelativeLayout.ALIGN_PARENT_TOP);break;case leftBottom:params.addRule(RelativeLayout.ALIGN_PARENT_LEFT);params.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);break;case leftTop:params.addRule(RelativeLayout.ALIGN_PARENT_LEFT);params.addRule(RelativeLayout.ALIGN_PARENT_TOP);break;case rightBottom:params.addRule(RelativeLayout.ALIGN_PARENT_RIGHT);params.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);break;case rightTop:params.addRule(RelativeLayout.ALIGN_PARENT_RIGHT);params.addRule(RelativeLayout.ALIGN_PARENT_TOP);break;}//设置marginparams.setMargins(indicatorMargin, indicatorMargin, indicatorMargin, indicatorMargin);//添加指示器容器布局到SliderLayoutaddView(indicatorContainer, params);//初始化指示器，并添加到指示器容器布局for (int i = 0; i < itemCount; i++) {ImageView indicator = new ImageView(getContext());indicator.setLayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT));indicator.setPadding(indicatorSpace, indicatorSpace, indicatorSpace, indicatorSpace);indicator.setImageDrawable(unSelectedDrawable);indicatorContainer.addView(indicator);}LoopPagerAdapter pagerAdapter = new LoopPagerAdapter(views);pager.setAdapter(pagerAdapter);//设置当前item到Integer.MAX_VALUE中间的一个值，看起来像无论是往前滑还是往后滑都是ok的//如果不设置，用户往左边滑动的时候已经划不动了int targetItemPosition = Integer.MAX_VALUE / 2 - Integer.MAX_VALUE / 2 % itemCount;pager.setCurrentItem(targetItemPosition);switchIndicator(targetItemPosition % itemCount);//addOnPageChangeListenerpager.setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() {@Overridepublic void onPageSelected(int position) {switchIndicator(position % itemCount);}});startAutoPlay();}public void setSliderTransformDuration(int duration) {try {Field mScroller = ViewPager.class.getDeclaredField("mScroller");mScroller.setAccessible(true);FixedSpeedScroller scroller = new FixedSpeedScroller(pager.getContext(), null, duration);mScroller.set(pager, scroller);} catch (Exception e) {}
}/*** 开始自动轮播*/
public void startAutoPlay() {stopAutoPlay(); // 避免重复消息if (isAutoPlay) {handler.sendEmptyMessageDelayed(WHAT_AUTO_PLAY, autoPlayDuration);}
}@Override
protected void onWindowVisibilityChanged(int visibility) {super.onWindowVisibilityChanged(visibility);if (visibility == VISIBLE) {startAutoPlay();} else {stopAutoPlay();}
}/*** 停止自动轮播*/
public void stopAutoPlay() {if (isAutoPlay) {handler.removeMessages(WHAT_AUTO_PLAY);}
}@Override
public boolean dispatchTouchEvent(MotionEvent ev) {switch (ev.getAction()) {case MotionEvent.ACTION_DOWN:stopAutoPlay();break;case MotionEvent.ACTION_CANCEL:case MotionEvent.ACTION_UP:startAutoPlay();break;}return super.dispatchTouchEvent(ev);
}/*** 切换指示器状态** @param currentPosition 当前位置*/
private void switchIndicator(int currentPosition) {for (int i = 0; i < indicatorContainer.getChildCount(); i++) {((ImageView) indicatorContainer.getChildAt(i)).setImageDrawable(i == currentPosition ? selectedDrawable : unSelectedDrawable);}
}public void setOnBannerItemClickListener(OnBannerItemClickListener onBannerItemClickListener) {this.onBannerItemClickListener = onBannerItemClickListener;
}public interface OnBannerItemClickListener {void onItemClick(int position);
}public class LoopPagerAdapter extends PagerAdapter {private List<View> views;public LoopPagerAdapter(List<View> views) {this.views = views;}@Overridepublic int getCount() {//Integer.MAX_VALUE = 2147483647return Integer.MAX_VALUE;}@Overridepublic boolean isViewFromObject(View view, Object object) {return view == object;}@Overridepublic Object instantiateItem(ViewGroup container, int position) {if (views.size() > 0) {//position % view.size()是指虚拟的position会在[0，view.size()）之间循环View view = views.get(position % views.size());if (container.equals(view.getParent())) {container.removeView(view);}container.addView(view);return view;}return null;}@Overridepublic void destroyItem(ViewGroup container, int position, Object object) {}
}public class FixedSpeedScroller extends Scroller {private int mDuration = 1000;public FixedSpeedScroller(Context context) {super(context);}public FixedSpeedScroller(Context context, Interpolator interpolator) {super(context, interpolator);}public FixedSpeedScroller(Context context, Interpolator interpolator, int duration) {this(context, interpolator);mDuration = duration;}@Overridepublic void startScroll(int startX, int startY, int dx, int dy, int duration) {// Ignore received duration, use fixed one insteadsuper.startScroll(startX, startY, dx, dy, mDuration);}@Overridepublic void startScroll(int startX, int startY, int dx, int dy) {// Ignore received duration, use fixed one insteadsuper.startScroll(startX, startY, dx, dy, mDuration);}
}

}
显示图片我用的是脸书的加载方式，你可以自行更换。
2.下面这是自定义的样式文件:

3.布局XML代码如下

记得xml布局文件上加上这句话
xmlns:app=”http://schemas.android.com/apk/res-auto”
标明支持自定义控件。
implements BannerLayout.OnBannerItemClickListener
给广告图添加监听事件。

/* 图片地址*/
private List imgurls = new ArrayList();
添加图片
bannerLayout.setViewUrls(imgurls);

基本就这些可以完美的实现自动广告轮播。麻蛋我直接复制代码居然不显示各位见谅, 有不明白的欢迎留言！

我们一起共同进步!表示谢谢！如果有技术问题欢迎

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