轮播图效果

package com.usung.smarttradetwo.widgets;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.drawable.Drawable;
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.util.AttributeSet;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.FrameLayout;
import android.widget.ImageView;
import android.widget.ImageView.ScaleType;
import android.widget.LinearLayout;

import com.bumptech.glide.Glide;
import com.usung.smarttradetwo.R;

import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;

/**
* ViewPager实现的轮播图广告自定义视图，如京东首页的广告轮播图效果；
* 既支持自动轮播页面也支持手势滑动切换页面
* @author caizhiming
*
*/

public class SlideShowView extends FrameLayout {

//轮播图图片数量
private int IMAGE_COUNT = 0;
//自动轮播的时间间隔
private final static int TIME_INTERVAL = 5;
//自动轮播启用开关
private final static boolean isAutoPlay = true;

private OnImageOnClickListener onImageOnClickListener=null;
//自定义轮播图的资源ID
private int[] imagesResIds;
//自定义轮播图的资源ID
private String[] imagesUrls;
//自定义轮播图的资源ID
private ArrayList<String> imagesPaths;
//放轮播图片的ImageView 的list
private List<ImageView> imageViewsList;
// 存放轮播图片的bitmap集合
private ArrayList<Bitmap> bitmaps;
//放圆点的View的list
private List<View> dotViewsList;
//上下文
private Context context;
private int m_type=0;

private ViewPager viewPager;
//当前轮播页
private int currentItem  = 0;
//定时任务
private ScheduledExecutorService scheduledExecutorService;
//Handler
private Handler handler = new Handler(){

@Override
public void handleMessage(Message msg) {
// TODO Auto-generated method stub
super.handleMessage(msg);
viewPager.setCurrentItem(currentItem);
}

};

public SlideShowView(Context context) {
this(context,null);
// TODO Auto-generated constructor stub
}
public SlideShowView(Context context, AttributeSet attrs) {
this(context, attrs, 0);
// TODO Auto-generated constructor stub
}
public SlideShowView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
// TODO Auto-generated constructor stub
this.context=context;
}
/**
* 开始轮播图切换
*/
private void startPlay(){
scheduledExecutorService = Executors.newSingleThreadScheduledExecutor();
scheduledExecutorService.scheduleAtFixedRate(new SlideShowTask(), 1, 8, TimeUnit.SECONDS);
}
/**
* 停止轮播图切换
*/
private void stopPlay(){
scheduledExecutorService.shutdown();
}
/**
* 初始化相关Data
*/
public void setData(int[] imagesResIds){
m_type=0;
this.imagesResIds=imagesResIds;
IMAGE_COUNT=imagesResIds.length;
initUI();
}

/**
* 初始化相关Data
*/
public void setData(String[] imagesUrls){
m_type=1;
this.imagesUrls=imagesUrls;
IMAGE_COUNT=imagesUrls.length;
initUI();
}

/**
* 初始化相关Data
*/
public void setData(ArrayList<String> imagesPaths){
m_type=2;
this.imagesPaths=imagesPaths;
this.imagesPaths.remove("");
IMAGE_COUNT=imagesPaths.size();
initUI();
}

/**
* 初始化相关Data
*/
public void setDataBitmap(ArrayList<Bitmap> bitmaps){
m_type=2;
this.bitmaps = bitmaps;
//    	this.imagesPaths.remove("");
IMAGE_COUNT=bitmaps.size();
initUI();
}

/**
* 初始化Views等UI
*/
private void initUI(){
imageViewsList = new ArrayList<ImageView>();
dotViewsList = new ArrayList<View>();
View content_viewView = LayoutInflater.from(context).inflate(R.layout.viewpager_ad_carousel, this, true);
LinearLayout dotLayout = (LinearLayout)content_viewView.findViewById(R.id.dotLayout);
dotLayout.removeAllViews();
for (int i = 0; i < IMAGE_COUNT; i++) {
ImageView view =  new ImageView(context);
if(m_type==0){
view.setImageResource(imagesResIds[i]);
}else if(m_type==1){
Glide.with(context).load(imagesUrls[i]).into(view);
//            	ImageLoader.getInstance().displayImage(imagesUrls[i], view);
}else {
Glide.with(context).load(imagesPaths.get(i)).into(view);
//				ImageLoader.getInstance().displayImage(imagesPaths.get(i), view);
}
view.setScaleType(ScaleType.FIT_XY);
view.setOnClickListener(new MyOnClick(i));

imageViewsList.add(view);
ImageView dotView =  new ImageView(context);
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(android.view.ViewGroup.LayoutParams.WRAP_CONTENT,android.view.ViewGroup.LayoutParams.WRAP_CONTENT);
params.leftMargin = 4;
params.rightMargin = 4;
dotLayout.addView(dotView, params);
dotViewsList.add(dotView);
}

viewPager = (ViewPager) content_viewView.findViewById(R.id.viewPager);
viewPager.setFocusable(true);

viewPager.setAdapter(new MyPagerAdapter());
viewPager.setOnPageChangeListener(new MyPageChangeListener());
if(isAutoPlay){
startPlay();
}
}

/**
* image的点击事件
* @author lijian
*
*/
private class MyOnClick implements OnClickListener {

private int position=0;
public MyOnClick(int position){
this.position=position;
}

@Override
public void onClick(View v) {
// TODO Auto-generated method stub
if(onImageOnClickListener!=null){
onImageOnClickListener.onclick(v,position);
}
}
}

/**
* 填充ViewPager的页面适配器
* @author caizhiming
*/
private class MyPagerAdapter  extends PagerAdapter {

@Override
public void destroyItem(View container, int position, Object object) {
// TODO Auto-generated method stub
//((ViewPag.er)container).removeView((View)object);
((ViewPager)container).removeView(imageViewsList.get(position));
}

@Override
public Object instantiateItem(View container, int position) {
// TODO Auto-generated method stub
((ViewPager)container).addView(imageViewsList.get(position));
return imageViewsList.get(position);
}

@Override
public int getCount() {
// TODO Auto-generated method stub
return imageViewsList.size();
}

@Override
public boolean isViewFromObject(View arg0, Object arg1) {
// TODO Auto-generated method stub
return arg0 == arg1;
}
@Override
public void restoreState(Parcelable arg0, ClassLoader arg1) {
// TODO Auto-generated method stub

}

@Override
public Parcelable saveState() {
// TODO Auto-generated method stub
return null;
}

@Override
public void startUpdate(View arg0) {
// TODO Auto-generated method stub

}

@Override
public void finishUpdate(View arg0) {
// TODO Auto-generated method stub

}

}
/**
* ViewPager的监听器
* 当ViewPager中页面的状态发生改变时调用
* @author caizhiming
*/
private class MyPageChangeListener implements OnPageChangeListener {

boolean isAutoPlay = false;

@Override
public void onPageScrollStateChanged(int arg0) {
// TODO Auto-generated method stub
switch (arg0) {
case 1:// 手势滑动，空闲中
isAutoPlay = false;
break;
case 2:// 界面切换中
isAutoPlay = true;
break;
case 0:// 滑动结束，即切换完毕或者加载完毕
// 当前为最后一张，此时从右向左滑，则切换到第一张
if (viewPager.getCurrentItem() == viewPager.getAdapter().getCount() - 1 && !isAutoPlay) {
viewPager.setCurrentItem(0);
}
// 当前为第一张，此时从左向右滑，则切换到最后一张
else if (viewPager.getCurrentItem() == 0 && !isAutoPlay) {
viewPager.setCurrentItem(viewPager.getAdapter().getCount() - 1);
}
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

currentItem = pos;
for(int i=0;i < dotViewsList.size();i++){
if(i == pos){
((View)dotViewsList.get(pos)).setBackgroundResource(R.mipmap.dot_red);
}else {
((View)dotViewsList.get(i)).setBackgroundResource(R.mipmap.dot_white);
}
}
}

}

/**
*执行轮播图切换任务
*@author caizhiming
*/
private class SlideShowTask implements Runnable {

@Override
public void run() {
// TODO Auto-generated method stub
synchronized (viewPager) {
currentItem = (currentItem+1)%imageViewsList.size();
handler.obtainMessage().sendToTarget();
}
}

}
/**
* 销毁ImageView资源，回收内存
* @author caizhiming
*/
private void destoryBitmaps() {

for (int i = 0; i < IMAGE_COUNT; i++) {
ImageView imageView = imageViewsList.get(i);
Drawable drawable = imageView.getDrawable();
if (drawable != null) {
//解除drawable对view的引用
drawable.setCallback(null);
}
}
}

// 以下两个方法给图片设置点击事件
public void setOnImageOnClick(OnImageOnClickListener onImageOnClickListener){
this.onImageOnClickListener=onImageOnClickListener;
}

public interface OnImageOnClickListener{
public void onclick(View view, int position);
}

}