android很有用轮播图实现,可下载

工具类：
package com.nngame.hnmj.utils;

import android.content.Context;
import android.os.Handler;
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.view.ViewGroup;
import android.widget.FrameLayout;
import android.widget.ImageView;
import android.widget.ImageView.ScaleType;
import android.widget.LinearLayout;

import com.nngame.hnmj.R;
import com.nostra13.universalimageloader.cache.disc.naming.Md5FileNameGenerator;
import com.nostra13.universalimageloader.core.DisplayImageOptions;
import com.nostra13.universalimageloader.core.ImageLoader;
import com.nostra13.universalimageloader.core.ImageLoaderConfiguration;
import com.nostra13.universalimageloader.core.assist.QueueProcessingType;

import java.util.ArrayList;
import java.util.List;
/**
 * Created by Administrator on 2017/3/6.
 * 轮播工具，可以直接调
 */

public class LunBoUtils extends FrameLayout {
    private int count;
    private ImageLoader mImageLoader;
    private List<ImageView> imageViews;
    private Context context;
    private ViewPager vp;
    private boolean isAutoPlay;
    private int currentItem;
    private int delayTime;
    private LinearLayout ll_dot;
    private List<ImageView> iv_dots;
    private Handler handler = new Handler();
    private DisplayImageOptions options;

    public LunBoUtils(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        this.context = context;
        initImageLoader(context);
        initData();
    }

    public LunBoUtils(Context context, AttributeSet attrs) {
        this(context, attrs, 0);
    }

    public LunBoUtils(Context context) {
        this(context, null);
    }

    private void initData() {
        imageViews = new ArrayList<ImageView>();
        iv_dots = new ArrayList<ImageView>();
        delayTime = 2000;
    }

    public void setImagesUrl(String[] imagesUrl) {
        initLayout();
        initImgFromNet(imagesUrl);
        showTime();
    }

    public void setImagesRes(int[] imagesRes) {
        initLayout();
        initImgFromRes(imagesRes);
        showTime();
    }

    private void initLayout() {
        imageViews.clear();
        View view = LayoutInflater.from(context).inflate(
                R.layout.lunbo_layout, this, true);
        vp = (ViewPager) view.findViewById(R.id.vp);
        ll_dot = (LinearLayout) view.findViewById(R.id.ll_dot);
        ll_dot.removeAllViews();
    }

    private void initImgFromRes(int[] imagesRes) {
        count = imagesRes.length;
        for (int i = 0; i < count; i++) {
            ImageView iv_dot = new ImageView(context);
            LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
                    LinearLayout.LayoutParams.WRAP_CONTENT,
                    LinearLayout.LayoutParams.WRAP_CONTENT);
            params.leftMargin = 5;
            params.rightMargin = 5;
            iv_dot.setImageResource(R.drawable.dot_blur);
            ll_dot.addView(iv_dot, params);
            iv_dots.add(iv_dot);
        }
        iv_dots.get(0).setImageResource(R.drawable.dot_focus);

        for (int i = 0; i <= count + 1; i++) {
            ImageView iv = new ImageView(context);
            iv.setScaleType(ScaleType.FIT_XY);
//            iv.setBackgroundResource(R.drawable.loading);
            if (i == 0) {
                iv.setImageResource(imagesRes[count - 1]);
            } else if (i == count + 1) {
                iv.setImageResource(imagesRes[0]);
            } else {
                iv.setImageResource(imagesRes[i - 1]);
            }
            imageViews.add(iv);
        }
    }

    private void initImgFromNet(String[] imagesUrl) {
        count = imagesUrl.length;
        for (int i = 0; i < count; i++) {
            ImageView iv_dot = new ImageView(context);
            LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
                    LinearLayout.LayoutParams.WRAP_CONTENT,
                    LinearLayout.LayoutParams.WRAP_CONTENT);
            params.leftMargin = 5;
            params.rightMargin = 5;
            iv_dot.setImageResource(R.drawable.dot_blur);
            ll_dot.addView(iv_dot, params);
            iv_dots.add(iv_dot);
        }
        iv_dots.get(0).setImageResource(R.drawable.dot_focus);

        for (int i = 0; i <= count + 1; i++) {
            ImageView iv = new ImageView(context);
            iv.setScaleType(ScaleType.FIT_XY);
//            iv.setBackgroundResource(R.mipmap.loading);
            if (i == 0) {
                mImageLoader.displayImage(imagesUrl[count - 1], iv, options);
            } else if (i == count + 1) {
                mImageLoader.displayImage(imagesUrl[0], iv, options);
            } else {
                mImageLoader.displayImage(imagesUrl[i - 1], iv, options);
            }
            imageViews.add(iv);
        }
    }

    private void showTime() {
        vp.setAdapter(new KannerPagerAdapter());
        vp.setFocusable(true);
        vp.setCurrentItem(1);
        currentItem = 1;
        vp.addOnPageChangeListener(new MyOnPageChangeListener());
        startPlay();
    }

    private void startPlay() {
        isAutoPlay = true;
        handler.postDelayed(task, 2000);
    }

    public void initImageLoader(Context context) {
        ImageLoaderConfiguration config = new ImageLoaderConfiguration.Builder(
                context).threadPriority(Thread.NORM_PRIORITY - 2)
                .denyCacheImageMultipleSizesInMemory()
                .diskCacheFileNameGenerator(new Md5FileNameGenerator())
                .tasksProcessingOrder(QueueProcessingType.LIFO)
                .writeDebugLogs().build();
        ImageLoader.getInstance().init(config);
        options = new DisplayImageOptions.Builder()
                .cacheInMemory(true)
                .cacheOnDisk(true)
                .build();
        mImageLoader = ImageLoader.getInstance();
    }

    private final Runnable task = new Runnable() {

        @Override
        public void run() {
            if (isAutoPlay) {
                currentItem = currentItem % (count + 1) + 1;
                if (currentItem == 1) {
                    vp.setCurrentItem(currentItem, false);
                    handler.post(task);
                } else {
                    vp.setCurrentItem(currentItem);
                    handler.postDelayed(task, 3000);
                }
            } else {
                handler.postDelayed(task, 5000);
            }
        }
    };

    class KannerPagerAdapter extends PagerAdapter {

        @Override
        public int getCount() {
            return imageViews.size();
        }

        @Override
        public boolean isViewFromObject(View arg0, Object arg1) {
            return arg0 == arg1;
        }

        @Override
        public Object instantiateItem(ViewGroup container, int position) {
            container.addView(imageViews.get(position));
            return imageViews.get(position);
        }

        @Override
        public void destroyItem(ViewGroup container, int position, Object object) {
            container.removeView(imageViews.get(position));
        }

    }

    class MyOnPageChangeListener implements OnPageChangeListener {

        @Override
        public void onPageScrollStateChanged(int arg0) {
            switch (arg0) {
                case 1:
                    isAutoPlay = false;
                    break;
                case 2:
                    isAutoPlay = true;
                    break;
                case 0:
                    if (vp.getCurrentItem() == 0) {
                        vp.setCurrentItem(count, false);
                    } else if (vp.getCurrentItem() == count + 1) {
                        vp.setCurrentItem(1, false);
                    }
                    currentItem = vp.getCurrentItem();
                    isAutoPlay = true;
                    break;
            }
        }

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

        @Override
        public void onPageSelected(int arg0) {
            for (int i = 0; i < iv_dots.size(); i++) {
                if (i == arg0 - 1) {
                    iv_dots.get(i).setImageResource(R.drawable.dot_focus);
                } else {
                    iv_dots.get(i).setImageResource(R.drawable.dot_blur);
                }
            }
        }

    }
    
    public void removeCallbacksAndMessages() {
        handler.removeCallbacksAndMessages(null);
        context = null;
    }

}

luobo_layout:
<?xml version="1.0" encoding="utf-8"?>
<merge xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <LinearLayout
        android:id="@+id/ll_dot"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="bottom"
        android:gravity="right"
        android:orientation="horizontal"
        android:padding="8dp">

        <View
            android:id="@+id/v_dot1"
            android:layout_width="8dp"
            android:layout_height="8dp"
            android:background="@drawable/dot_focus" />

        <View
            android:id="@+id/v_dot2"
            android:layout_width="8dp"
            android:layout_height="8dp"
            android:layout_marginLeft="5dp"
            android:background="@drawable/dot_blur" />
    </LinearLayout>

    <android.support.v4.view.ViewPager
        android:id="@+id/vp"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

</merge>
firstFragment调用:
 <com.utils.LunBoUtils
        android:id="@+id/lunbo"
        android:layout_width="match_parent"
        android:layout_height="220dp">


    </com.utils.LunBoUtils>

------------
 int[] imagesRes = {R.drawable.a1, R.drawable.a2, R.drawable.a3,
                R.drawable.a4, R.drawable.a5};
        lunbo.setImagesRes(imagesRes);
-----------------------------------------------
github地址：
https://github.com/whyareyousomw/Kanner;