Android自定义View实现广告信息上下滚动效果

先看看效果：

实现代码：

public class ScrollBanner extends LinearLayout {

  private TextView mBannerTV1;
  private TextView mBannerTV2;
  private Handler handler;
  private boolean isShow;
  private int startY1, endY1, startY2, endY2;
  private Runnable runnable;
  private List list;
  private int position = 0;
  private int offsetY = 100;


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

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

  public ScrollBanner(Context context, AttributeSet attrs, int defStyleAttr) {
    super(context, attrs, defStyleAttr);
    View view = LayoutInflater.from(context).inflate(R.layout.view_scroll_banner, this);
    mBannerTV1 = (TextView) view.findViewById(R.id.tv_banner1);
    mBannerTV2 = (TextView) view.findViewById(R.id.tv_banner2);

    handler = new Handler();

    runnable = new Runnable() {
      @Override
      public void run() {
        isShow = !isShow;

        if (position == list.size())
          position = 0;

        if (isShow) {
          mBannerTV1.setText(list.get(position++));
        } else {
          mBannerTV2.setText(list.get(position++));
        }

        startY1 = isShow ? 0 : offsetY;
        endY1 = isShow ? -offsetY : 0;


        ObjectAnimator.ofFloat(mBannerTV1, "translationY", startY1, endY1).setDuration(300).start();

        startY2 = isShow ? offsetY : 0;
        endY2 = isShow ? 0 : -offsetY;
        ObjectAnimator.ofFloat(mBannerTV2, "translationY", startY2, endY2).setDuration(300).start();

        handler.postDelayed(runnable, 3000);
      }
    };

  }


  public List getList() {
    return list;
  }

  public void setList(List list) {
    this.list = list;
  }

  public void startScroll() {
    handler.post(runnable);
  }

  public void stopScroll() {
    handler.removeCallbacks(runnable);
  }
}

view_scroll_banner.xml：

使用方法：

scrollBanner.setList(list);
scrollBanner.startScroll();

以上就是本文的全部内容，希望对大家学习Android软件编程有所帮助，也希望大家多多支持脚本之家。