Android自定义图片轮播Banner控件使用解析

public class BannerView extends RelativeLayout {

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

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

  public BannerView(Context context, AttributeSet attrs, int defStyleAttr) {
    super(context, attrs, defStyleAttr);}

private Context context;

  private Handler handler;
  private ImageLoader imageLoader;
  private DisplayImageOptions options;
  private boolean isHaveHandler = true;// 当用户点击轮播图时，取消handler队列，也就是取消滚动
  // 控件Start
  private ViewPager viewPager;
  private LinearLayout indicator;// 指示器
  private onItemClickListener listener;
  // 控件End

  // 自定义属性Start
  private float mAspectRatio; // 宽高比
  private int defaultImageResource; // 默认占位图
  private int updateTime; // 图片切换的时间间隔,默认3秒
  private boolean showIndicator; // 是否显示指示器,默认显示
  private int indicatorHeight;// 指示器的高度,默认35dp
  private int indicatorPositionSize; // 指示器的大小
  private int indicatorBackground; // 指示器的背景颜色
  // 自定义属性End
  // 数据Start
  private int imageCount;
  private int lastPosition;

  private List imageResources;
  private List imageUrls;
  // 数据End

public BannerView(Context context, AttributeSet attrs, int defStyleAttr) {
    super(context, attrs, defStyleAttr);
    parseCustomAttributes(context, attrs);
    this.cOntext= context;
    handler = new Handler();
    imageLoader = ImageLoader.getInstance();
    optiOns= HSApplication.getDisplayOptions().build();
    initViews();
  }
  /**
   * 解析自定义属性
   *
   * @param context
   * @param attrs
   */
  private void parseCustomAttributes(Context context, AttributeSet attrs) {
    TypedArray typedArray = context.obtainStyledAttributes(attrs, R.styleable.BannerView);
    mAspectRatio = typedArray.getFloat(R.styleable.BannerView_aspectRatio, 0f);
    defaultImageResource = typedArray.getResourceId(R.styleable.BannerView_defaultSrc,
        R.drawable.about_us);
    updateTime = typedArray.getInt(R.styleable.BannerView_updateTime, 3000);
    showIndicator = typedArray.getBoolean(R.styleable.BannerView_indicatorVisible, true);
    indicatorHeight = (int) (typedArray.getDimension(R.styleable.BannerView_indicatorHeight,
        Utils.dip2px(context, 35)));
    indicatorBackground = typedArray.getResourceId(R.styleable.BannerView_indicatorBackground,
        R.color.white_alpha00);
    indicatorPositiOnSize= (int) typedArray.getDimension(
        R.styleable.BannerView_indicatorPositionSize, Utils.dip2px(context, 5));
    typedArray.recycle();
  }
  private void initViews() {
    viewPager = new ViewPager(context);
    viewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
      @Override
      public void onPageScrolled(int position, float positionOffset,
          int positionOffsetPixels) {

      }

      @Override
      public void onPageSelected(int position) {
        if (showIndicator) {
          for (int i = 0; i 

 public void setImageResources(List imageResources) {
    if (imageResources == null || imageResources.size() == 0) {
      throw new RuntimeException("图片资源为空");
    }
    this.imageResources = imageResources;
    imageCount = imageResources.size();
  }

  public void setImageUrls(List imageUrls) {
    if (imageUrls == null || imageUrls.size() == 0) {
      throw new RuntimeException("图片地址资源为空");
    }
    this.imageUrls = imageUrls;
    imageCount = imageUrls.size();
    loadImages();
  }

  private void loadImages() {
    if (showIndicator) {
      addIndicationPoint();
    }
    viewPager.setAdapter(new MyViewPageAdapter());
    viewPager.setCurrentItem(200 - (200 % imageCount));
    handler.removeCallbacks(updateRunnable);
    handler.postDelayed(updateRunnable, updateTime);
  }

  /**
   * 添加指示点到指示器中
   */
  private void addIndicationPoint() {
    // 防止刷新重复添加
    if (indicator.getChildCount() > 0) {
      indicator.removeAllViews();
    }
    View pointView;
    int margin = Utils.dip2px(context, 5f);
    LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(
        indicatorPositionSize, indicatorPositionSize);
    layoutParams.setMargins(margin, margin, margin, margin);

    for (int i = 0; i