MainActivity.java 文件源码

@Override
public void onClick(final View button) {
    button.setEnabled(false);
    View icon = findViewById(R.id.icon);

    Keyframe keyframe1 = Keyframe.ofFloat(0f, 0f);
    Keyframe keyframe2 = Keyframe.ofFloat(.4f, 90f);
    Keyframe keyframe3 = Keyframe.ofFloat(.6f, 90f);
    Keyframe keyframe4 = Keyframe.ofFloat(1f, 0f);
    PropertyValuesHolder propertyValuesHolder = PropertyValuesHolder.ofKeyframe("rotation", keyframe1, keyframe2, keyframe3, keyframe4);
    ObjectAnimator rotationAnim = ObjectAnimator.ofPropertyValuesHolder(icon, propertyValuesHolder);
    rotationAnim.setDuration(5000);
    rotationAnim.addListener(new AnimatorListenerAdapter() {
        @Override
        public void onAnimationEnd(Animator animation) {
            button.setEnabled(true);
        }
    });
    rotationAnim.setInterpolator(new AccelerateDecelerateInterpolator());
    rotationAnim.start();
}