package com.example.an.shoppingdetial;
import android.annotation.SuppressLint;
import android.content.Context;
import android.os.Handler;
import android.os.Message;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.util.AttributeSet;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewParent;
import android.widget.Gallery;
import android.widget.ImageView;
import android.widget.LinearLayout;
import java.util.ArrayList;
import java.util.List;
import java.util.Timer;
import java.util.TimerTask;
/**
* Created by user on 2016/6/29.
*/
@SuppressWarnings("deprecation")
public class BannerViewPager extends ViewPager {
private Context mContext;
private List<BannerBean> mAdsId; // 图片本地资源ID组
private List<BannerBean> mUrllist = new ArrayList<BannerBean>(); // 图片网络路径数组
List<ImageView> listImgs; // ImageView组
private Timer mTimer;
private int curIndex = 0;
private LinearLayout mOvalLayout;
private int mNormalId;
private int mFocusedId;
private int scrollTime = 3 * 1000; // 滚动时间间隔
private MyOnItemClickListener onItemClickListener;
public BannerViewPager(Context context) {
super(context);
}
public BannerViewPager(Context context, AttributeSet attrs) {
super(context, attrs);
}
private void init() {
listImgs = new ArrayList<ImageView>(); // 图片组
int len = mUrllist.size() != 0 ? mUrllist.size() : mAdsId.size();
for (int i = 0; i < len; i++) {
ImageView imageview = new ImageView(mContext); // 实例化ImageView的对象
imageview.setScaleType(ImageView.ScaleType.FIT_XY); // 设置缩放方式
imageview.setLayoutParams(new Gallery.LayoutParams(
Gallery.LayoutParams.MATCH_PARENT,
Gallery.LayoutParams.MATCH_PARENT));
if (mUrllist.size() == 0) {// 本地加载图片
imageview.setImageResource(Integer.valueOf(mAdsId.get(i).url)); // 为ImageView设置要显示的图片
imageview.setScaleType(ImageView.ScaleType.CENTER_CROP);
} else { // 网络加载图片
// ImageLoader.getInstance().displayImage(mUrllist.get(i).getImageUrl(),
// imageview, ImageLoaderUtils.getOptions());
imageview.setScaleType(ImageView.ScaleType.CENTER_CROP);
}
final int imagePosition = i;
imageview.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
if (onItemClickListener != null)
onItemClickListener.onItemClick(imagePosition);
}
});
listImgs.add(imageview);
}
}
/** 初始化圆点 */
private void initOvalLayout() {
if (mOvalLayout != null) {
mOvalLayout.removeAllViews();
// 圆点的大小是 圆点窗口的 70%;
int Ovalheight = (int) (mOvalLayout.getLayoutParams().height * 0.5);
// 圆点的左右外边距是 圆点窗口的 20%;
int Ovalmargin = (int) (mOvalLayout.getLayoutParams().height * 0.2);
LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(
Ovalheight, Ovalheight);
layoutParams.setMargins(Ovalmargin, 0, Ovalmargin, 0);
for (int i = 0; i < listImgs.size(); i++) {
View v = new View(mContext); // 圆点
v.setLayoutParams(layoutParams);
v.setBackgroundResource(mNormalId);
mOvalLayout.addView(v);
}
// 选中第一个
mOvalLayout.getChildAt(0).setBackgroundResource(mFocusedId);
}
}
public void start(Context context, List<BannerBean> list,
List<BannerBean> adsId, LinearLayout ovalLayout, int focusedId,
int normalId) {
stopTimer();
this.mContext = context;
this.mUrllist = list;
this.mAdsId = adsId;
this.mOvalLayout = ovalLayout;
this.mFocusedId = focusedId;
this.mNormalId = normalId;
this.curIndex = 0;
init();
initOvalLayout();
ImagePaperAdapter adapter = new ImagePaperAdapter(listImgs);
this.setAdapter(adapter);
this.setCurrentItem(0);
this.setOnPageChangeListener(new MyPageChangeListener(this));
startTimer();
}
/** 设置项目点击事件监听器 */
public void setMyOnItemClickListener(MyOnItemClickListener listener) {
onItemClickListener = listener;
}
// 项目点击事件监听器接口
public interface MyOnItemClickListener {
void onItemClick(int curIndex);
}
class ImagePaperAdapter extends PagerAdapter {
private List<ImageView> list;
public ImagePaperAdapter(List<ImageView> list) {
this.list = list;
}
@Override
public int getCount() {
return list.size();
}
@Override
public boolean isViewFromObject(View arg0, Object arg1) {
return arg0 == arg1;
}
@Override
public void destroyItem(ViewGroup container, int position, Object object) {
}
@Override
public Object instantiateItem(ViewGroup container, int position) {
ImageView view = list.get(position);
ViewParent vp = view.getParent();
if (vp != null) {
ViewGroup parent = (ViewGroup) vp;
parent.removeView(view);
}
((ViewPager) container).addView(list.get(position));
return list.get(position);
}
}
private class MyPageChangeListener implements OnPageChangeListener {
boolean isAutoPlay = false;
private BannerViewPager bannerViewPager;
public MyPageChangeListener(BannerViewPager bannerViewPager) {
this.bannerViewPager = bannerViewPager;
}
@Override
public void onPageScrollStateChanged(int arg0) {
// TODO Auto-generated method stub
switch (arg0) {
case 1:// 手势滑动，空闲中
isAutoPlay = false;
System.out.println(" 手势滑动，空闲中");
break;
case 2:// 界面切换中
isAutoPlay = true;
stopTimer();
System.out.println(" 界面切换中");
break;
case 0:// 滑动结束，即切换完毕或者加载完毕
if (bannerViewPager.getCurrentItem() == bannerViewPager
.getAdapter().getCount() - 1 && !isAutoPlay) {
bannerViewPager.setCurrentItem(0);
} else if (bannerViewPager.getCurrentItem() == 0 && !isAutoPlay) {
bannerViewPager.setCurrentItem(bannerViewPager.getAdapter()
.getCount() - 1);
}
System.out.println(" 当前界面 " + bannerViewPager.getCurrentItem());
startTimer();
break;
}
}
@Override
public void onPageScrolled(int arg0, float arg1, int arg2) {
// TODO Auto-generated method stub
}
@Override
public void onPageSelected(int pos) {
// TODO Auto-generated method stub
// 这里面动态改变小圆点的被背景，来实现效果
curIndex = pos;
for (int i = 0; i < listImgs.size(); i++) {
mOvalLayout.getChildAt(i).setBackgroundResource(mNormalId); // 圆点取消
if (i == curIndex)
mOvalLayout.getChildAt(curIndex).setBackgroundResource(
mFocusedId);// 圆点选中
}
}
}
/** 处理定时滚动任务 */
@SuppressLint("HandlerLeak")
private Handler handler = new Handler() {
@Override
public void handleMessage(Message msg) {
super.handleMessage(msg);
curIndex = (curIndex + 1) % listImgs.size();
setCurrentItem(curIndex);
}
};
/** 停止自动滚动任务 */
public void stopTimer() {
if (mTimer != null) {
mTimer.cancel();
mTimer = null;
}
}
/** 开始自动滚动任务 图片大于1张才滚动 */
public void startTimer() {
if (mTimer == null && listImgs.size() > 1) {
mTimer = new Timer();
mTimer.schedule(new TimerTask() {
public void run() {
handler.sendMessage(handler.obtainMessage(1));
}
}, scrollTime, scrollTime);
}
}
}
