BottomViewHideShowAnimation.java 文件源码

public BottomViewHideShowAnimation(View view, boolean toVisible, long duration) {
    super(false);
    this.toVisible = toVisible;
    this.animationView = view;

    //Creates the Alpha animation for the transition
    float startAlpha = toVisible ? 0 : 1;
    float endAlpha = toVisible ? 1 : 0;

    AlphaAnimation alphaAnimation = new AlphaAnimation(startAlpha, endAlpha);
    alphaAnimation.setDuration(duration);


    //Creates the Translate animation for the transition
    int startY = toVisible ? getHideShowDelta(view) : 0;
    int endY = toVisible ? 0 : getHideShowDelta(view);
    TranslateAnimation translateAnimation = new TranslateAnimation(0, 0, startY, endY);
    translateAnimation.setInterpolator(toVisible ? new LinearOutSlowInInterpolator() : new FastOutLinearInInterpolator());
    translateAnimation.setDuration(duration);


    //Adds the animations to the set
    addAnimation(alphaAnimation);
    addAnimation(translateAnimation);

    setAnimationListener(new Listener());
}