在做的專案有太多動畫 一天下來手機就很卡 優化方案：

先看我之前寫的程式碼：

        ObjectAnimator animator = ObjectAnimator.ofFloat(innerView, "translationY", 0f, 30f, 0f);

　　　　　animator.setDuration(400).setInterpolator(new DampInterpolator());
　　　　　animator.start();

然後換成這種：

private PropertyValuesHolder animatorX;
    private PropertyValuesHolder animatorY;
 
    animatorX 
 
= PropertyValuesHolder.ofFloat("scaleX", 0f, 1.0f);
    animatorY = PropertyValuesHolder.ofFloat("scaleY", 0f, 1.0f);
    ObjectAnimator.ofPropertyValuesHolder(view, animatorX, animatorY).start();

之前程式碼：

AnimatorSet animSet = new AnimatorSet();
 
ObjectAnimator transYFirstAnim = ObjectAnimator.ofFloat(mView, "translationY", 0, 100);
ObjectAnimator transYSecondAnim 
 
= ObjectAnimator.ofFloat(mView, "translationY", 100, 0);
animSet.playSequentially(transYFirstAnim, transYSecondAnim);

換成

Keyframe k0 = Keyframe.ofFloat(0f, 0); //第一個引數為“何時”，第二個引數為“何地”
Keyframe k1 = Keyframe.ofFloat(0.5f, 100);
Keyframe k2 = Keyframe.ofFloat(1f, 0);
 
PropertyValuesHolder p = PropertyValuesHolder.ofKeyframe("translationY", k0, k1, k2);
ObjectAnimator objectAnimator 
 
= ObjectAnimator.ofPropertyValuesHolder(mView, p);
objectAnimator.start();