ExpandableLayout.java 文件源码

private void expand(final View v) {
    v.measure(-1, -2);
    final int targetHeight = v.getMeasuredHeight();
    v.getLayoutParams().height = 0;
    v.setVisibility(0);
    this.animation = new Animation() {
        protected void applyTransformation(float interpolatedTime, Transformation t) {
            if (interpolatedTime == 1.0f) {
                ExpandableLayout.this.isOpened = Boolean.valueOf(true);
            }
            v.getLayoutParams().height = interpolatedTime == 1.0f ? -2 : (int) (((float)
                    targetHeight) * interpolatedTime);
            v.requestLayout();
        }

        public boolean willChangeBounds() {
            return true;
        }
    };
    this.animation.setDuration((long) this.duration.intValue());
    v.startAnimation(this.animation);
}