WheelPicker.java 文件源码

public void doEnterAnim(final View contentView, long animDuration) {
    if (builder.gravity == Gravity.BOTTOM) {
        ValueAnimator enterAnimator = ValueAnimator.ofFloat(contentView.getHeight(), 0);
        enterAnimator.setDuration(animDuration);
        enterAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
            @Override
            public void onAnimationUpdate(ValueAnimator animation) {
                float value = (float) animation.getAnimatedValue();
                contentView.setTranslationY(value);
            }
        });
        enterAnimator.start();
    } else {
        ScaleAnimation scaleAnimation = new ScaleAnimation(0F, 1.0F, 0F, 1.0F,
                Animation.RELATIVE_TO_PARENT, 0.5F, Animation.RELATIVE_TO_PARENT, 0.5F);
        scaleAnimation.setDuration(animDuration);
        scaleAnimation.setFillAfter(true);
        contentView.startAnimation(scaleAnimation);
    }
}