Android实现Banner界面广告图片循环轮播(包括实现手动滑动循环)

前言:经常会看到有一些app的banner界面可以实现循环播放多个广告图片和手动滑动循环。本以为单纯的ViewPager就可以实现这些功能。但是蛋疼的事情来了,ViewPager并不支持循环翻页。所以要实现循环还得需要自己去动手。自己在网上也找了些例子,本博文的Demo是结合自己找到的一些相关例子的基础上去改造,也希望对读者有用。

  Demo实现的效果图如下:

 

Demo代码:

 1.主Activity代码如下:

  1 package com.stevenhu.android.phone.ui;
  2 
  3 import java.util.ArrayList;
  4 import java.util.List;
  5 
  6 import com.nostra13.universalimageloader.cache.disc.naming.Md5FileNameGenerator;
  7 import com.nostra13.universalimageloader.core.DisplayImageOptions;
  8 import com.nostra13.universalimageloader.core.ImageLoader;
  9 import com.nostra13.universalimageloader.core.ImageLoaderConfiguration;
 10 import com.nostra13.universalimageloader.core.assist.QueueProcessingType;
 11 import com.stevenhu.android.phone.bean.ADInfo;
 12 import com.stevenhu.android.phone.utils.ViewFactory;
 13 
 14 import android.annotation.SuppressLint;
 15 import android.app.Activity;
 16 import android.os.Bundle;
 17 import android.view.View;
 18 import android.widget.ImageView;
 19 import android.widget.Toast;
 20 import cn.androiddevelop.cycleviewpager.lib.CycleViewPager;
 21 import cn.androiddevelop.cycleviewpager.lib.CycleViewPager.ImageCycleViewListener;
 22 /**
 23  * 描述:主页
 24  *
 25  * @author stevenhu
 26  * @version 2015年5月8日 上午10:47:37
 27  */
 28 public class MainActivity extends Activity {
 29 
 30     private List<ImageView> views = new ArrayList<ImageView>();
 31     private List<ADInfo> infos = new ArrayList<ADInfo>();
 32     private CycleViewPager cycleViewPager;
 33     
 34     private String[] imageUrls = {"http://img.taodiantong.cn/v55183/infoimg/2013-07/130720115322ky.jpg",
 35             "http://pic30.nipic.com/20130626/8174275_085522448172_2.jpg",
 36             "http://pic18.nipic.com/20111215/577405_080531548148_2.jpg",
 37             "http://pic15.nipic.com/20110722/2912365_092519919000_2.jpg",
 38             "http://pic.58pic.com/58pic/12/64/27/55U58PICrdX.jpg"};
 39     
 40     @Override
 41     protected void onCreate(Bundle savedInstanceState) {
 42         super.onCreate(savedInstanceState);
 43         setContentView(R.layout.ui_main);
 44         configImageLoader();
 45         initialize();
 46     }
 47     
 48     @SuppressLint("NewApi")
 49     private void initialize() {
 50         
 51         cycleViewPager = (CycleViewPager) getFragmentManager()
 52                 .findFragmentById(R.id.fragment_cycle_viewpager_content);
 53         
 54         for(int i = 0; i < imageUrls.length; i ++){
 55             ADInfo info = new ADInfo();
 56             info.setUrl(imageUrls[i]);
 57             info.setContent("图片-->" + i );
 58             infos.add(info);
 59         }
 60         
 61         // 将最后一个ImageView添加进来
 62         views.add(ViewFactory.getImageView(this, infos.get(infos.size() - 1).getUrl()));
 63         for (int i = 0; i < infos.size(); i++) {
 64             views.add(ViewFactory.getImageView(this, infos.get(i).getUrl()));
 65         }
 66         // 将第一个ImageView添加进来
 67         views.add(ViewFactory.getImageView(this, infos.get(0).getUrl()));
 68         
 69         // 设置循环,在调用setData方法前调用
 70         cycleViewPager.setCycle(true);
 71 
 72         // 在加载数据前设置是否循环
 73         cycleViewPager.setData(views, infos, mAdCycleViewListener);
 74         //设置轮播
 75         cycleViewPager.setWheel(true);
 76 
 77         // 设置轮播时间,默认5000ms
 78         cycleViewPager.setTime(2000);
 79         //设置圆点指示图标组居中显示,默认靠右
 80         cycleViewPager.setIndicatorCenter();
 81     }
 82     
 83     private ImageCycleViewListener mAdCycleViewListener = new ImageCycleViewListener() {
 84 
 85         @Override
 86         public void onImageClick(ADInfo info, int position, View imageView) {
 87             if (cycleViewPager.isCycle()) {
 88                 position = position - 1;
 89                 Toast.makeText(MainActivity.this,
 90                         "position-->" + info.getContent(), Toast.LENGTH_SHORT)
 91                         .show();
 92             }
 93             
 94         }
 95 
 96     };
 97     
 98     /**
 99      * 配置ImageLoder
100      */
101     private void configImageLoader() {
102         // 初始化ImageLoader
103         @SuppressWarnings("deprecation")
104         DisplayImageOptions options = new DisplayImageOptions.Builder().showStubImage(R.drawable.icon_stub) // 设置图片下载期间显示的图片
105                 .showImageForEmptyUri(R.drawable.icon_empty) // 设置图片Uri为空或是错误的时候显示的图片
106                 .showImageOnFail(R.drawable.icon_error) // 设置图片加载或解码过程中发生错误显示的图片
107                 .cacheInMemory(true) // 设置下载的图片是否缓存在内存中
108                 .cacheOnDisc(true) // 设置下载的图片是否缓存在SD卡中
109                 // .displayer(new RoundedBitmapDisplayer(20)) // 设置成圆角图片
110                 .build(); // 创建配置过得DisplayImageOption对象
111 
112         ImageLoaderConfiguration config = new ImageLoaderConfiguration.Builder(getApplicationContext()).defaultDisplayImageOptions(options)
113                 .threadPriority(Thread.NORM_PRIORITY - 2).denyCacheImageMultipleSizesInMemory()
114                 .discCacheFileNameGenerator(new Md5FileNameGenerator()).tasksProcessingOrder(QueueProcessingType.LIFO).build();
115         ImageLoader.getInstance().init(config);        
116     }
117 }

 2.主文件ui_main.xml代码如下:

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 3     android:layout_width="match_parent"
 4     android:layout_height="match_parent"
 5     android:orientation="vertical" >
 6     
 7 
 8     <fragment
 9         android:id="@+id/fragment_cycle_viewpager_content"
10         android:name="cn.androiddevelop.cycleviewpager.lib.CycleViewPager"
11         android:layout_width="match_parent"
12         android:layout_height="180dip" />
13      
14      
15     <RelativeLayout 
16         android:layout_width="fill_parent"
17         android:layout_height="0dip"
18         android:layout_weight="1">
19         
20         <TextView 
21             android:layout_width="wrap_content"
22             android:layout_height="wrap_content"
23             android:layout_centerInParent="true"
24             android:text="content"/>
25     </RelativeLayout>
26     
27 </LinearLayout>

3.CycleViewPager类代码如下:

  1 package cn.androiddevelop.cycleviewpager.lib;
  2 
  3 import java.util.ArrayList;
  4 import java.util.List;
  5 
  6 import android.annotation.SuppressLint;
  7 import android.app.Fragment;
  8 import android.os.Bundle;
  9 import android.os.Message;
 10 import android.support.v4.view.PagerAdapter;
 11 import android.support.v4.view.ViewPager.OnPageChangeListener;
 12 import android.view.LayoutInflater;
 13 import android.view.View;
 14 import android.view.View.OnClickListener;
 15 import android.view.ViewGroup;
 16 import android.widget.FrameLayout;
 17 import android.widget.ImageView;
 18 import android.widget.LinearLayout;
 19 import android.widget.RelativeLayout;
 20 
 21 import com.stevenhu.android.phone.bean.ADInfo;
 22 import com.stevenhu.android.phone.ui.R;
 23 
 24 /**
 25  * 实现可循环,可轮播的viewpager
 26  */
 27 @SuppressLint("NewApi")
 28 public class CycleViewPager extends Fragment implements OnPageChangeListener {
 29     
 30     private List<ImageView> imageViews = new ArrayList<ImageView>();
 31     private ImageView[] indicators;
 32     private FrameLayout viewPagerFragmentLayout;
 33     private LinearLayout indicatorLayout; // 指示器
 34     private BaseViewPager viewPager;
 35     private BaseViewPager parentViewPager;
 36     private ViewPagerAdapter adapter;
 37     private CycleViewPagerHandler handler;
 38     private int time = 5000; // 默认轮播时间
 39     private int currentPosition = 0; // 轮播当前位置
 40     private boolean isScrolling = false; // 滚动框是否滚动着
 41     private boolean isCycle = false; // 是否循环
 42     private boolean isWheel = false; // 是否轮播
 43     private long releaseTime = 0; // 手指松开、页面不滚动时间,防止手机松开后短时间进行切换
 44     private int WHEEL = 100; // 转动
 45     private int WHEEL_WAIT = 101; // 等待
 46     private ImageCycleViewListener mImageCycleViewListener;
 47     private List<ADInfo> infos;
 48 
 49     @Override
 50     public View onCreateView(LayoutInflater inflater, ViewGroup container,
 51             Bundle savedInstanceState) {
 52         View view = LayoutInflater.from(getActivity()).inflate(
 53                 R.layout.view_cycle_viewpager_contet, null);
 54 
 55         viewPager = (BaseViewPager) view.findViewById(R.id.viewPager);
 56         indicatorLayout = (LinearLayout) view
 57                 .findViewById(R.id.layout_viewpager_indicator);
 58 
 59         viewPagerFragmentLayout = (FrameLayout) view
 60                 .findViewById(R.id.layout_viewager_content);
 61 
 62         handler = new CycleViewPagerHandler(getActivity()) {
 63 
 64             @Override
 65             public void handleMessage(Message msg) {
 66                 super.handleMessage(msg);
 67                 if (msg.what == WHEEL && imageViews.size() != 0) {
 68                     if (!isScrolling) {
 69                         int max = imageViews.size() + 1;
 70                         int position = (currentPosition + 1) % imageViews.size();
 71                         viewPager.setCurrentItem(position, true);
 72                         if (position == max) { // 最后一页时回到第一页
 73                             viewPager.setCurrentItem(1, false);
 74                         }
 75                     }
 76 
 77                     releaseTime = System.currentTimeMillis();
 78                     handler.removeCallbacks(runnable);
 79                     handler.postDelayed(runnable, time);
 80                     return;
 81                 }
 82                 if (msg.what == WHEEL_WAIT && imageViews.size() != 0) {
 83                     handler.removeCallbacks(runnable);
 84                     handler.postDelayed(runnable, time);
 85                 }
 86             }
 87         };
 88 
 89         return view;
 90     }
 91 
 92     public void setData(List<ImageView> views, List<ADInfo> list, ImageCycleViewListener listener) {
 93         setData(views, list, listener, 0);
 94     }
 95 
 96     /**
 97      * 初始化viewpager
 98      * 
 99      * @param views
100      *            要显示的views
101      * @param showPosition
102      *            默认显示位置
103      */
104     public void setData(List<ImageView> views, List<ADInfo> list, ImageCycleViewListener listener, int showPosition) {
105         mImageCycleViewListener = listener;
106         infos = list;
107         this.imageViews.clear();
108 
109         if (views.size() == 0) {
110             viewPagerFragmentLayout.setVisibility(View.GONE);
111             return;
112         }
113 
114         for (ImageView item : views) {
115             this.imageViews.add(item);
116         }
117 
118         int ivSize = views.size();
119 
120         // 设置指示器
121         indicators = new ImageView[ivSize];
122         if (isCycle)
123             indicators = new ImageView[ivSize - 2];
124         indicatorLayout.removeAllViews();
125         for (int i = 0; i < indicators.length; i++) {
126             View view = LayoutInflater.from(getActivity()).inflate(
127                     R.layout.view_cycle_viewpager_indicator, null);
128             indicators[i] = (ImageView) view.findViewById(R.id.image_indicator);
129             indicatorLayout.addView(view);
130         }
131 
132         adapter = new ViewPagerAdapter();
133 
134         // 默认指向第一项,下方viewPager.setCurrentItem将触发重新计算指示器指向
135         setIndicator(0);
136 
137         viewPager.setOffscreenPageLimit(3);
138         viewPager.setOnPageChangeListener(this);
139         viewPager.setAdapter(adapter);
140         if (showPosition < 0 || showPosition >= views.size())
141             showPosition = 0;
142         if (isCycle) {
143             showPosition = showPosition + 1;
144         }
145         viewPager.setCurrentItem(showPosition);
146 
147     }
148 
149     /**
150      * 设置指示器居中,默认指示器在右方
151      */
152     public void setIndicatorCenter() {
153         RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(
154                 RelativeLayout.LayoutParams.WRAP_CONTENT,
155                 RelativeLayout.LayoutParams.WRAP_CONTENT);
156         params.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);
157         params.addRule(RelativeLayout.CENTER_HORIZONTAL);
158         indicatorLayout.setLayoutParams(params);
159     }
160 
161     /**
162      * 是否循环,默认不开启,开启前,请将views的最前面与最后面各加入一个视图,用于循环
163      * 
164      * @param isCycle
165      *            是否循环
166      */
167     public void setCycle(boolean isCycle) {
168         this.isCycle = isCycle;
169     }
170 
171     /**
172      * 是否处于循环状态
173      * 
174      * @return
175      */
176     public boolean isCycle() {
177         return isCycle;
178     }
179 
180     /**
181      * 设置是否轮播,默认不轮播,轮播一定是循环的
182      * 
183      * @param isWheel
184      */
185     public void setWheel(boolean isWheel) {
186         this.isWheel = isWheel;
187         isCycle = true;
188         if (isWheel) {
189             handler.postDelayed(runnable, time);
190         }
191     }
192 
193     /**
194      * 是否处于轮播状态
195      * 
196      * @return
197      */
198     public boolean isWheel() {
199         return isWheel;
200     }
201 
202     final Runnable runnable = new Runnable() {
203 
204         @Override
205         public void run() {
206             if (getActivity() != null && !getActivity().isFinishing()
207                     && isWheel) {
208                 long now = System.currentTimeMillis();
209                 // 检测上一次滑动时间与本次之间是否有触击(手滑动)操作,有的话等待下次轮播
210                 if (now - releaseTime > time - 500) {
211                     handler.sendEmptyMessage(WHEEL);
212                 } else {
213                     handler.sendEmptyMessage(WHEEL_WAIT);
214                 }
215             }
216         }
217     };
218 
219     /**
220      * 释放指示器高度,可能由于之前指示器被限制了高度,此处释放
221      */
222     public void releaseHeight() {
223         getView().getLayoutParams().height = RelativeLayout.LayoutParams.MATCH_PARENT;
224         refreshData();
225     }
226 
227     /**
228      * 设置轮播暂停时间,即没多少秒切换到下一张视图.默认5000ms
229      * 
230      * @param time
231      *            毫秒为单位
232      */
233     public void setTime(int time) {
234         this.time = time;
235     }
236 
237     /**
238      * 刷新数据,当外部视图更新后,通知刷新数据
239      */
240     public void refreshData() {
241         if (adapter != null)
242             adapter.notifyDataSetChanged();
243     }
244 
245     /**
246      * 隐藏CycleViewPager
247      */
248     public void hide() {
249         viewPagerFragmentLayout.setVisibility(View.GONE);
250     }
251 
252     /**
253      * 返回内置的viewpager
254      * 
255      * @return viewPager
256      */
257     public BaseViewPager getViewPager() {
258         return viewPager;
259     }
260 
261     /**
262      * 页面适配器 返回对应的view
263      * 
264      * @author Yuedong Li
265      * 
266      */
267     private class ViewPagerAdapter extends PagerAdapter {
268 
269         @Override
270         public int getCount() {
271             return imageViews.size();
272         }
273 
274         @Override
275         public boolean isViewFromObject(View arg0, Object arg1) {
276             return arg0 == arg1;
277         }
278 
279         @Override
280         public void destroyItem(ViewGroup container, int position, Object object) {
281             container.removeView((View) object);
282         }
283 
284         @Override
285         public View instantiateItem(ViewGroup container, final int position) {
286             ImageView v = imageViews.get(position);
287             if (mImageCycleViewListener != null) {
288                 v.setOnClickListener(new OnClickListener() {
289                     
290                     @Override
291                     public void onClick(View v) {
292                         mImageCycleViewListener.onImageClick(infos.get(currentPosition - 1), currentPosition, v);
293                     }
294                 });
295             }
296             container.addView(v);
297             return v;
298         }
299 
300         @Override
301         public int getItemPosition(Object object) {
302             return POSITION_NONE;
303         }
304     }
305 
306     @Override
307     public void onPageScrollStateChanged(int arg0) {
308         if (arg0 == 1) { // viewPager在滚动
309             isScrolling = true;
310             return;
311         } else if (arg0 == 0) { // viewPager滚动结束
312             if (parentViewPager != null)
313                 parentViewPager.setScrollable(true);
314 
315             releaseTime = System.currentTimeMillis();
316 
317             viewPager.setCurrentItem(currentPosition, false);
318             
319         }
320         isScrolling = false;
321     }
322 
323     @Override
324     public void onPageScrolled(int arg0, float arg1, int arg2) {
325     }
326 
327     @Override
328     public void onPageSelected(int arg0) {
329         int max = imageViews.size() - 1;
330         int position = arg0;
331         currentPosition = arg0;
332         if (isCycle) {
333             if (arg0 == 0) {
334                 currentPosition = max - 1;
335             } else if (arg0 == max) {
336                 currentPosition = 1;
337             }
338             position = currentPosition - 1;
339         }
340         setIndicator(position);
341     }
342 
343     /**
344      * 设置viewpager是否可以滚动
345      * 
346      * @param enable
347      */
348     public void setScrollable(boolean enable) {
349         viewPager.setScrollable(enable);
350     }
351 
352     /**
353      * 返回当前位置,循环时需要注意返回的position包含之前在views最前方与最后方加入的视图,即当前页面试图在views集合的位置
354      * 
355      * @return
356      */
357     public int getCurrentPostion() {
358         return currentPosition;
359     }
360 
361     /**
362      * 设置指示器
363      * 
364      * @param selectedPosition
365      *            默认指示器位置
366      */
367     private void setIndicator(int selectedPosition) {
368         for (int i = 0; i < indicators.length; i++) {
369             indicators[i]
370                     .setBackgroundResource(R.drawable.icon_point);
371         }
372         if (indicators.length > selectedPosition)
373             indicators[selectedPosition]
374                     .setBackgroundResource(R.drawable.icon_point_pre);
375     }
376 
377     /**
378      * 如果当前页面嵌套在另一个viewPager中,为了在进行滚动时阻断父ViewPager滚动,可以 阻止父ViewPager滑动事件
379      * 父ViewPager需要实现ParentViewPager中的setScrollable方法
380      */
381     public void disableParentViewPagerTouchEvent(BaseViewPager parentViewPager) {
382         if (parentViewPager != null)
383             parentViewPager.setScrollable(false);
384     }
385 
386     
387     /**
388      * 轮播控件的监听事件
389      * 
390      * @author minking
391      */
392     public static interface ImageCycleViewListener {
393 
394         /**
395          * 单击图片事件
396          * 
397          * @param position
398          * @param imageView
399          */
400         public void onImageClick(ADInfo info, int postion, View imageView);
401     }
402 }

CycleViewPager类为实现可循环,可轮播的ViewPager的核心类,继承自Fragment,具体实现原理就不多说了,代码中都有相关的注释。

 

  ok,接下来的其他类就不多说了。自己下载Demo学习吧。

   本博文Demo下载链接地址如下:

   http://download.csdn.net/detail/stevenhu_223/8675717

 

   另外,还有一种通过自定义ViewPager实现和本博文相同效果的广告界面Demo,这里就不再贴代码,可以通过如下地址下载:

   http://download.csdn.net/detail/stevenhu_223/8697903

posted @ 2016-05-19 17:19  火龙裸先生  阅读(1818)  评论(0编辑  收藏  举报