Android之属性动画简介

前言

一直在用，但老是记不住，因此记录于此，方便自己查阅。

纸上得来终觉浅

正文

下面简单记录一下属性动画的旋转、平移、缩放和透明度渐变。

缩放

1. 对X轴

private void TestScaleX(View view) {
    ObjectAnimator scaleX = ObjectAnimator.ofFloat(view, "scaleX", 1.0f, 1.5f, 1);
    scaleX.setDuration(500);
    scaleX.start();
}

2. 对Y轴

private void TestScaleY(View view) {
    ObjectAnimator scaleY = ObjectAnimator.ofFloat(view, "scaleY", 1.0f, 1.5f, 1);
    scaleY.setDuration(500);
    scaleY.start();
}

3. 对X和Y轴

private void TestScaleXY(View view) {
    AnimatorSet animatorSet = new AnimatorSet();
    /**
     *  组合动画
     *  view         : 缩放的View
     *  propertyName : 动画类型: scaleX 对x轴进行缩放
     *  value1       : 起始值，缩放起始值，1.0f就是默认大小
     *  value2       : 结束值，缩放结束值，1.5f意思在原来基础上放大0.5f
     *
     *  PS： value 可以有N个，中间的是过度值，最后的是结束状态值
     */
    ObjectAnimator scaleX = ObjectAnimator.ofFloat(view, "scaleX", 1.0f, 1.5f);
    ObjectAnimator scaleY = ObjectAnimator.ofFloat(view, "scaleY", 1.0f, 1.5f);
    animatorSet.setDuration(500);
    animatorSet.setInterpolator(new LinearInterpolator());
    animatorSet.play(scaleX).with(scaleY);
    animatorSet.start();
}

透明度渐变

@SuppressLint("ObjectAnimatorBinding")
private void TestAlpha(View view) {
    /**
     *  alpha 范围值 0.0f-1.0f
     */
    ObjectAnimator alpha = ObjectAnimator.ofFloat(view, "alpha", 1.0f, 0.5f);
    alpha.setDuration(500);
    alpha.start();
}

平移

1. 对X轴

@SuppressLint("ObjectAnimatorBinding")
private void TestTranslationX(View view) {
    ObjectAnimator translation = ObjectAnimator.ofFloat(view, "translationX", 0, 300, 0);
    translation.setDuration(500);
    translation.start();
}

2. 对Y轴

@SuppressLint("ObjectAnimatorBinding")
private void TestTranslationY(View view) {
    ObjectAnimator translation = ObjectAnimator.ofFloat(view, "translationY", 0, 300, 0);
    translation.setDuration(500);
    translation.start();
}

3. 对XY轴

private void TestTranslation(View view) {
    AnimatorSet animatorSet = new AnimatorSet();
    ObjectAnimator translationX = ObjectAnimator.ofFloat(view, "translationX", 0, 300, 0);
    ObjectAnimator translationY = ObjectAnimator.ofFloat(view, "translationY", 0, 300, 0);
    animatorSet.setDuration(500);
    animatorSet.setInterpolator(new LinearInterpolator());
    animatorSet.play(translationX).with(translationY);
    animatorSet.start();
}

旋转

1. 对X轴

private void TestRotationX(View view) {
    ObjectAnimator rotationX = ObjectAnimator.ofFloat(view, "rotationX", 0, 180);
    rotationX.setDuration(500);
    rotationX.start();
}

2. 对Y轴

private void TestRotationY(View view) {
    ObjectAnimator rotationY = ObjectAnimator.ofFloat(view, "rotationY", 0, 180);
    rotationY.setDuration(500);
    rotationY.start();
}

3. 对Z轴

private void TestRotation(View view) {
    /**
     * rotation 范围值 0-360
     */
    ObjectAnimator rotation = ObjectAnimator.ofFloat(view, "rotation", 0, 180);
    rotation.setDuration(500);
    rotation.start();
}

参考文章

1. 《Android 实现属性动画平移，旋转，缩放，渐变》
2. 《ValueAnimator、objectAnimator的基础用法》
3. 《自定义控件三部曲之动画篇(七)——ObjectAnimator基本使用》