Android development rewrites Animation to achieve the effect of ejecting back after pulling down the image

This article describes the effect of Android development rewriting Animation to achieve the pull-down image and ejecting it back. Share it for your reference, as follows:

1. Analysis:

1）interpolatedTimeRefers to the rate of change of translation (from 0 to 1)
2）mStartHeight The height at which the control starts
3）endHeight The height of the control after vertical movement
4）();The image fills the layout and fixes after changing the height
5）(interpolatedTime, mStartHeight, mEndHeight) + 0.5f)Get the height after changing

2. Code:

/**
  * @Description Use flat-moving painting to implement the image and then eject it back
  * @Project name App_imooc
  * @Bank Name
  * @Class Name ResetAnimation
  * @author chenlin
  * @date May 29, 2015 12:27:00 pm
  * @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) {
     = imageView;
     = startHeight;
     = endHeight;
    setDuration(500);
  }
  @Override
  protected void applyTransformation(float interpolatedTime, Transformation t) {
    int newHeight = (int) ((interpolatedTime, mStartHeight, mEndHeight) + 0.5f);
    ().height = newHeight;
    ();
    (interpolatedTime, t);
  }
}

3. How to use:

// Vertical Move AnimationResetAnimation anim = new ResetAnimation(mImageView, startHeight, endHeight);
(new OvershootInterpolator());
startAnimation(anim);

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I hope this article will be helpful to everyone's Android programming design.