ObjectAnimator基本用法

//參數一：要操縱的view；
//參數二：要操縱的屬性(translationX、translationY、rotationX、rotationY、rotation、scaleX、scaleY， alpha)
//參數三：可變數組參數，代表屬性變化的一個取值過程。
ObjectAnimator translationX = ObjectAnimator.ofFloat(mTestView, “translationX”, 300);

PropertyValuesHolder 混合效果

   PropertyValuesHolder rotationHolder = PropertyValuesHolder.ofFloat("rotation", 0f, 180f);
   PropertyValuesHolder scaleX = PropertyValuesHolder.ofFloat("scaleX", 0.5f, 1f);
   PropertyValuesHolder scaleY = PropertyValuesHolder.ofFloat("scaleY", 0.5f, 1f);
   PropertyValuesHolder alpha = PropertyValuesHolder.ofFloat("alpha", 0.0f, 1.0f);
   ObjectAnimator animator = ObjectAnimator.ofPropertyValuesHolder(target, rotationHolder, scaleX, scaleY, alpha);
   animator.setDuration(2000);
   animator.start();

	或者
	PropertyValuesHolder rotationHolder = PropertyValuesHolder.ofFloat("rotation", 0f, 180f);

        PropertyValuesHolder scaleX = PropertyValuesHolder.ofFloat("scaleX", 0.5f, 1f);
        PropertyValuesHolder scaleY = PropertyValuesHolder.ofFloat("scaleY", 0.5f, 1f);

        PropertyValuesHolder alpha = PropertyValuesHolder.ofFloat("alpha", 0.0f, 1.0f);

        ObjectAnimator animator = ObjectAnimator.ofPropertyValuesHolder(ivBg, scaleX, scaleY, alpha);
        animator.setDuration(300);

        ObjectAnimator rotationAnim = ObjectAnimator.ofPropertyValuesHolder(ivBg, rotationHolder);
        rotationAnim.setDuration(2000);

        AnimatorSet set = new AnimatorSet();
        set.playTogether(animator, rotationAnim);
        set.start();
        set.addListener(new AnimatorListenerAdapter() {
            @Override
            public void onAnimationEnd(Animator animation) {
                super.onAnimationEnd(animation);
                dismiss();
            }
        });

tips

PropertyValuesHolder alpha1 = PropertyValuesHolder.ofFloat(“alpha”, 0.0f, 1.0f);
PropertyValuesHolder alphaOut = PropertyValuesHolder.ofFloat(“alpha”, 1.0f, 0.0f);
PropertyValuesHolder scaleX1 = PropertyValuesHolder.ofFloat(“scaleX”, 0.5f, 1.05f, 1.0f);
PropertyValuesHolder scaleY1 = PropertyValuesHolder.ofFloat(“scaleY”, 0.5f, 1.05f, 1.0f);

1. scale 和 alpha 執行動畫時需要先隱藏targetView，否則效果會有先出現比較詭異的效果
2. 先調用addListener()再調用start(）否則某些情況可能沒有回調onAnimationStart()中的邏輯
3. ObjectAnimator 調用addListener #onAnimationStart 可以看到預期效果，但是，在AnimatorSet 中使用 Animatoron onAnimationStart 不會按delay時間執行maybe this is bug。