Android首页轮播图直接拿来用

import java.util.ArrayList;

import java.util.List;

import java.util.concurrent.Executors;

import java.util.concurrent.ScheduledExecutorService;

import java.util.concurrent.TimeUnit;

 

import android.content.Context;

import android.os.Handler;

import android.support.v4.view.ViewPager;

import android.support.v4.view.ViewPager.OnPageChangeListener;

import android.util.AttributeSet;

import android.view.Gravity;

import android.view.MotionEvent;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.ImageView;

import android.widget.ImageView.ScaleType;

import android.widget.LinearLayout;

import android.widget.RelativeLayout;

 

public class HeadAD extends RelativeLayout {

    private ViewPager vp;

    private LinearLayout symbolLayout, bottomLayout;

    private LayoutParams lp;

    // private ArrayList<imageview> symbolViews;

    private List<viewpagerbean> showResults;

    private boolean isContinue = true;

    private int currentItem = 0; // 当前图片的索引号

 

    private ScheduledExecutorService updateService;

 

    private Context context;

 

    public void initData(List<viewpagerbean> pResult) {

        showResults = pResult;

    }

 

    public HeadAD(Context context, AttributeSet attrs) {

        super(context, attrs);

        this.context = context;

        // setBackgroundResource(R.color.black);

 

    }

 

    public void initView(Context context) {

        // TODO Auto-generated method stub

 

        lp = new LayoutParams(LayoutParams.MATCH_PARENT, DensityUtil.dip2px(

                context, 180));

        vp = new ViewPager(context);

        vp.setLayoutParams(lp);

 

        lp = new LayoutParams(LayoutParams.MATCH_PARENT, DensityUtil.dip2px(

                context, 20));

 

        lp.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);

        bottomLayout = new LinearLayout(context);

        bottomLayout.setGravity(Gravity.CENTER);

        bottomLayout.setOrientation(LinearLayout.VERTICAL);

        bottomLayout.setLayoutParams(lp);

        bottomLayout.setBackgroundResource(R.color.footerBg);

 

        lp = new LayoutParams(LayoutParams.MATCH_PARENT,

                LayoutParams.WRAP_CONTENT);

        symbolLayout = new LinearLayout(context);

        symbolLayout.setGravity(Gravity.CENTER);

        symbolLayout.setOrientation(LinearLayout.HORIZONTAL);

        symbolLayout.setPadding(0, 0, 5, 5);

 

        ImageView symbolIv;

        for (int i = 0; i < showResults.size(); i++) {

            if (showResults.size() > 1) {

                symbolIv = new ImageView(context);

                LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(

                        LinearLayout.LayoutParams.WRAP_CONTENT,

                        LinearLayout.LayoutParams.WRAP_CONTENT);

 

                params.rightMargin = 10;

                symbolIv.setBackgroundResource(R.drawable.point_bg);

                symbolIv.setEnabled(false);

                if (i == 0) {

                    symbolIv.setEnabled(true);

                } else {

                    symbolIv.setEnabled(false);

                }

                symbolIv.setLayoutParams(params);

                symbolLayout.addView(symbolIv);

            }

 

        }

        bottomLayout.addView(symbolLayout);

        adapter = new ViewPagerAdapter(context, showResults);

        vp.setAdapter(adapter);

        vp.setOnTouchListener(new OnTouchListener() {

 

            @Override

            public boolean onTouch(View v, MotionEvent event) {

                // TODO Auto-generated method stub

 

                switch (event.getAction()) {

                case MotionEvent.ACTION_DOWN:

                    isContinue = false;

                    break;

                case MotionEvent.ACTION_MOVE:

                    isContinue = false;

                    break;

                case MotionEvent.ACTION_UP:

                    isContinue = true;

                    break;

                case MotionEvent.ACTION_CANCEL:

                    break;

                }

                return false;

            }

        });

        vp.setOnPageChangeListener(new MyPageChangeListener());

        addView(vp);

        addView(bottomLayout);

 

    }

 

    private Handler viewPagerHandler = new Handler() {

        public void handleMessage(android.os.Message msg) {

            vp.setCurrentItem(currentItem % showResults.size());// 切换当前显示的图片

        };

    };

    public ViewPagerAdapter adapter;

 

    // 直接在activity的OnResume里调用，当前界面是该activity时开始循环

 

    public void startUpdate() {

        this.updateService = Executors.newSingleThreadScheduledExecutor();

 

        this.updateService.scheduleAtFixedRate(new ScrollTask(), 5, 5,

                TimeUnit.SECONDS);

 

    }

 

    // 直接在activity的OnPause里调用，当前界面不是该activity时停止循环

 

    public void stopUpdate() {

        this.updateService.shutdown();

        updateService = null;

    }

 

    /**

     * 当ViewPager中页面的状态发生改变时调用

     *

     *

     */

    private class MyPageChangeListener implements OnPageChangeListener {

        private int oldPosition = 0;

 

        public void onPageSelected(int position) {

            currentItem = position % showResults.size();

            symbolLayout.getChildAt(oldPosition).setEnabled(false);

            symbolLayout.getChildAt(position).setEnabled(true);

            oldPosition = position;

        }

 

        public void onPageScrollStateChanged(int arg0) {

 

        }

 

        public void onPageScrolled(int arg0, float arg1, int arg2) {

 

        }

    }

 

    /**

     * 换行切换任务

     *

     * @author Administrator

     *

     */

    private class ScrollTask implements Runnable {

 

        public void run() {

            if (isContinue) {

                synchronized (vp) {

                    System.out.println("currentItem: " + currentItem);

                    currentItem = (currentItem + 1) % showResults.size();

                    viewPagerHandler.obtainMessage().sendToTarget(); // 通过Handler切换图片

                }

            }

        }

 

    }

 

}

</viewpagerbean></viewpagerbean></imageview>

HEADAD 实现了自定轮播计时。

下面看adapter写法 删除了部分项目逻辑

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import java.util.List;   import android.content.Context; import android.content.Intent; import android.support.v4.view.PagerAdapter; import android.view.View; import android.view.View.OnClickListener; import android.view.ViewGroup; import android.widget.ImageView;     import com.nostra13.universalimageloader.core.DisplayImageOptions;   /*******************************************************  *  *  ********************************************************/ public class ViewPagerAdapter extends PagerAdapter {       List<viewpagerbean> lists;     Context ct;     private ImageView imgView;     private int currentPosition = 0;     private DisplayImageOptions options;       public ViewPagerAdapter(Context ct, List<viewpagerbean> mList) {         lists = mList;         this.ct = ct;         options = new DisplayImageOptions.Builder().cacheInMemory(true)                 .cacheOnDisk(true)                 .showImageOnLoading(R.drawable.default_news_logo).build();     }       /**      * 获得页面的总数      */     public int getCount() {         return lists.size();     }       /**      * 获得相应位置上的view container view的容器      */     public Object instantiateItem(ViewGroup container, final int position) {         // imgView.setOnClickListener(this);           imgView = new ImageView(ct);           imgView.setScaleType(ImageView.ScaleType.FIT_XY);         if (lists.size() == 0) {           } else {             //写自己的逻辑             currentPosition = position % lists.size();                         }                     // 给 container 添加一个view         container.addView(imgView);         // 返回一个和该view相对的object         return imgView;     }       /**      * 判断 view和object的对应关系      */     public boolean isViewFromObject(View view, Object object) {         if (view == object) {             return true;         } else {             return false;         }     }       /**      * 销毁对应位置上的object      */     public void destroyItem(ViewGroup container, int position, Object object) {           container.removeView((View) object);         object = null;     }       @Override     public int getItemPosition(Object object) {         // TODO Auto-generated method stub         return super.getItemPosition(object);     }   } </viewpagerbean></viewpagerbean>

实体bean这里就不贴了

用到工具类 ......还有几个不重要就不贴了

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import android.content.Context;   public class DensityUtil {     /**      * 根据手机的分辨率从 dip 的单位 转成为 px(像素)      */     public static int dip2px(Context context, float dpValue) {         final float scale = context.getResources().getDisplayMetrics().density;         return (int) (dpValue * scale + 0.5f);     }       /**      * 根据手机的分辨率从 px(像素) 的单位 转成为 dp      */     public static int px2dip(Context context, float pxValue) {         final float scale = context.getResources().getDisplayMetrics().density;         return (int) (pxValue / scale + 0.5f);     }   }

如何调用：

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mViewPager = new HeadAD(getActivity(), null);         mViewPager.initData(viewPagerLists);         mViewPager.initView(getActivity());

就这样就OK了。