属性动画 常用属性及View常用方法

View类中，常用于属性动画的属性：

translationX and translationY: These properties control where the View is located as a delta from its left and top coordinates which are set by its layout container.
rotation, rotationX, and rotationY: These properties control the rotation in 2D (rotation property) and 3D around the pivot point.
scaleX and scaleY: These properties control the 2D scaling of a View around its pivot point.
pivotX and pivotY: These properties control the location of the pivot point, around which the rotation and scaling transforms occur. By default, the pivot point is located at the center of the object.
x and y: These are simple utility properties to describe the final location of the View in its container, as a sum of the left and top values and translationX and translationY values.
alpha: Represents the alpha transparency on the View. This value is 1 (opaque) by default, with a value of 0 representing full transparency (not visible).

android.view.ViewPropertyAnimator

ObjectAnimator animX = ObjectAnimator.ofFloat(myView, "x", 50f);
ObjectAnimator animY = ObjectAnimator.ofFloat(myView, "y", 100f);
AnimatorSet animSetXY = new AnimatorSet();
animSetXY.playTogether(animX, animY);
animSetXY.start();

PropertyValuesHolder pvhX = PropertyValuesHolder.ofFloat("x", 50f);
PropertyValuesHolder pvhY = PropertyValuesHolder.ofFloat("y", 100f);
ObjectAnimator.ofPropertyValuesHolder(myView, pvhX, pvhY).start();

viewPropertyAnimator

myView.animate().x(50f).y(100f);