輪播圖在每個app中扮演著一個點綴的角色，在獨立做了三款app後都有這個需求，所以我決定把它單獨抽出來。以後只需copy,然後再根據需求改一下即可。

/**
 * 載入網路輪播圖
 *@author jiangrongtao
 *
 *csdn:http://blog.csdn.net/jiang_rong_tao
 *
 *github:https://github.com/jiangrongtao/jiangrongtao.github.io
 *
 * created at 2016/6/3 9:14
*/


public class BannerView {
    private View bannerView;
    private
 
 Context mContext;
    private Map<String,String> maps;
    private FragmentManager manager;
    private List<Fragment> mList;
    private MyChildViewPager bannerPager;
    private ImageView defImage;//設定預設圖片
    public  static boolean LOAD_FINISH=false;//是成功載入banner
    private LinearLayout llDots;//下部的小白點的佈局
 

    public  boolean isRoll = false;//是否輪播
    private List<View> dotList = new ArrayList<View>();//存放小白點

    private static final String TAG = "BannerView";
    public BannerView(Context context,Map<String,String> maps,FragmentManager manager){
        this.mContext=context;
        this
 
.maps=maps;
        this.manager=manager;
        mList=new ArrayList<Fragment>();
    }
    protected Handler handler = new Handler() {
        public void handleMessage(Message msg) {
            switch (msg.what){
                case 1:
                    final List<BannerInfo> data = (List<BannerInfo>) msg.obj;
                    setBannerInfo(data);
                    break;
                case 2:
                    LOAD_FINISH=false;
                    defImage.setVisibility(View.VISIBLE);
                    break;
                case 3:
                    if (mList.size() > 0) {
                        bannerPager.setCurrentItem((bannerPager.getCurrentItem() + 1) % mList.size());
                    } else {
                        isRoll = false;
                    }
                    break;
            }
        }
    };

    /**
     * 設定banner資訊
     * @param data
     */
    private void setBannerInfo(final List<BannerInfo> data) {
        mList.clear();
        for (int i = 0; i < data.size(); i++) {
            final int j = i;
            final ImageView imageView = new ImageView(mContext);
            BannerInfo bannerInfo = data.get(i);
            APIImageLoader.displayImage(mContext,bannerInfo.getUrl(), R.drawable.banner_fial,R.drawable.banner_fial,imageView);
            imageView.setOnClickListener(new View.OnClickListener() {
             @Override
                public void onClick(View v) {
                    String hrefUrl = data.get(j).getHrefUrl();
                    if (!TextUtils.isEmpty(hrefUrl)) {
                        Intent intent = new Intent(mContext, AppDetailActivity.class);
                        intent.putExtra("hrefUrl", hrefUrl);
                        mContext.startActivity(intent);
                    }
                }
            });
            Fragment fragment = new Fragment() {
                @Override
                public View onCreateView(LayoutInflater inflater, ViewGroup container,
                                         Bundle savedInstanceState) {
                    return imageView;
                }
            };
            mList.add(fragment);
        }
        if(mList.size()>0){
            defImage.setVisibility(View.GONE);
            bannerPager.setAdapter(new BannerAdapter(manager, mList));
            initDot();
            bannerPager.setCurrentItem(0);
            LOAD_FINISH=true;
        }else{
            LOAD_FINISH=false;
            defImage.setVisibility(View.VISIBLE);
        }
    }

    public View getBannerView() {
        bannerView=View.inflate(mContext, R.layout.banner_layout,null);
        bannerPager= (MyChildViewPager) bannerView.findViewById(R.id.banner_pager);
        defImage = (ImageView)bannerView.findViewById(R.id.iv_default_page);
        llDots=(LinearLayout)bannerView.findViewById(R.id.ll_dots);
        initBannersData();
        return bannerView;
    }
    /*
    * 設定迴圈輪播
    * */
    public void setBannerCycle(long loopTime){

        if(LOAD_FINISH){
            if(null!=bannerPager){
                isRoll=true;
                startLooper(loopTime);
                bannerPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
                    @Override
                    public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {

                    }

                    @Override
                    public void onPageSelected(int position) {
                        switchDot(position);
                    }

                    @Override
                    public void onPageScrollStateChanged(int state) {

                    }
                });
            }
        }
    }

    /**
     * 開啟輪播
     * @param loopTime 輪播間隔時間
     */
    private void startLooper(final long loopTime) {

        new Thread() {
            public void run() {
                while (isRoll) {
                   handler.sendEmptyMessageDelayed(3,loopTime);
                }
            };
        }.start();
    }

    //獲取網路banner圖片
    private void initBannersData() {
        maps.clear();
        RequestManager.getInstance(mContext).sendPost(APIConfig.GET_BANNERS, maps, BannerRes.class, new Callback<BannerRes>() {
            @Override
            public BannerRes parseNetworkResponse(Response response) throws Exception {
                return  GsonUtils.object(response.body().string(),BannerRes.class);
            }

            @Override
            public void onError(Call call, Exception e) {

            }

            @Override
            public void onResponse(BannerRes response) {

                if(APIResCode.SUCCESS.equals(response.getResCode())){
                    List<BannerInfo> data = response.getData();
                    if (data!=null&&data.size()>0){
                        handler.sendMessage(handler.obtainMessage(1, data));
                    }else{
                        handler.sendEmptyMessage(2);
                    }
                }
            }
        });
    }
    /**
     * 初始化小圓點
     */
    private void initDot() {
        llDots.removeAllViews();
        dotList.clear();
        for (int i = 0; i < mList.size(); i++) {
            View view = new View(mContext);
            //預設選中第一個小白點
            view.setBackgroundResource(i == 0?R.drawable.dot_sel:R.drawable.dot_nor);
            LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(8, 8);
            params.setMargins(0, 0, 12, 0);
            llDots.addView(view, params);
            dotList.add(view);
        }
    }
    /**
     * 切換圓點
     */
    private void switchDot(int position) {
        for (int i = 0; i < dotList.size(); i++) {
            dotList.get(i).setBackgroundResource(i == position?R.drawable.dot_sel:R.drawable.dot_nor);
        }
    }
}

輪播圖介面卡：

public class BannerAdapter extends FragmentPagerAdapter{
    List<Fragment> list ;
    public BannerAdapter(FragmentManager fm, List<Fragment> list) {
        super(fm);
        this.list = list ;
    }
    @Override
    public  Fragment getItem(int index) {
        return list.get(index%list.size());
    }
    @Override
    public int getCount() {
        return list.size();
    }
}

佈局檔案：

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center" >
    <com.jianzhilaila.money.ui.view.myviewpager.MyChildViewPager
        android:id="@+id/banner_pager"
        android:layout_width="match_parent"
        android:layout_height="200dp">
    </com.jianzhilaila.money.ui.view.myviewpager.MyChildViewPager>
    <ImageView
        android:id="@+id/iv_default_page"
        android:layout_width="match_parent"
        android:layout_height="208dp"
        android:background="@drawable/banner_fial" />
    <LinearLayout
    android:id="@+id/ll_dots"
    android:layout_width="match_parent"
    android:layout_height="8dp"
    android:layout_alignParentBottom="true"
    android:gravity="center"
    android:layout_gravity="bottom"
    android:layout_marginBottom="10dp"
    android:orientation="horizontal" />
</FrameLayout>

具體用法

//獲取banner
 BannerView bannerView = new BannerView(context, maps,   getChildFragmentManager());
        View banner = bannerView.getBannerView();
        mLinearLayout.addView(banner,0);
        bannerView.setBannerCycle(1500);

在onDestroyView()或onDestroy()中記得設定：**isRoll=false;** ,避免記憶體溢位。
mLinearLayout是輪播圖頁面的根佈局。getChildFragmentManager是由於我的Viewpager是巢狀使用的。MyChildViewPager 是一個自定義的防止巢狀使用滑動事件衝突的類。RequestManager和APIImageLoader是我自己二次封裝的網路請求和圖片載入類，在我以前的部落格http://blog.csdn.net/jiang_rong_tao/article/details/51516977中。

注意：上面程式碼有很多要改進的地方，如果有bug自己修復，可以把改進的程式碼分享一下。