ClockView.java 文件源码

private void startNewSteadyAnim() {
    final String propertyNameRotateX = "canvasRotateX";
    final String propertyNameRotateY = "canvasRotateY";

    PropertyValuesHolder holderRotateX = PropertyValuesHolder.ofFloat(propertyNameRotateX, canvasRotateX, 0);
    PropertyValuesHolder holderRotateY = PropertyValuesHolder.ofFloat(propertyNameRotateY, canvasRotateY, 0);
    steadyAnim = ValueAnimator.ofPropertyValuesHolder(holderRotateX, holderRotateY);
    steadyAnim.setDuration(1000);
    steadyAnim.setInterpolator(new BounceInterpolator());
    steadyAnim.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
        @Override
        public void onAnimationUpdate(ValueAnimator animation) {
            canvasRotateX = (float) animation.getAnimatedValue(propertyNameRotateX);
            canvasRotateY = (float) animation.getAnimatedValue(propertyNameRotateY);
        }
    });
    steadyAnim.start();
}