Android开发重写Animation实现下拉图片后弹射回去效果示例

/** * @描述     使用平移动画实现下拉图片后弹射回去 * @项目名称   App_imooc * @包名     com.android.imooc.paralla * @类名     ResetAnimation * @author   chenlin * @date    2015年5月29日 下午12:27:00 * @version   1.0 */public class ResetAnimation extends Animation {  private ImageView mImageView;  private int mStartHeight;  private int mEndHeight;  public ResetAnimation(ImageView imageView, int startHeight, int endHeight) {    this.mImageView = imageView;    this.mStartHeight = startHeight;    this.mEndHeight = endHeight;    setDuration(500);  }  @Override  protected void applyTransformation(float interpolatedTime, Transformation t) {    int newHeight = (int) (ValueUtil.evalute(interpolatedTime, mStartHeight, mEndHeight) + 0.5f);    mImageView.getLayoutParams().height = newHeight;    mImageView.requestLayout();    super.applyTransformation(interpolatedTime, t);  }}

//竖直移动动画ResetAnimation anim = new ResetAnimation(mImageView, startHeight, endHeight);anim.setInterpolator(new OvershootInterpolator());startAnimation(anim);