转自:http://blog.csdn.net/jjwwmlp456/article/details/38518657
Property Animation介绍:
出生在3.0,是利用了View所拥有的属性,进行一系列的操作。比如一个View有什么样的setAbc的属性,那么理论上就可以设置它。
它不仅改变View的绘制,也改变了View的属性;而Tween Animation 只改变View的绘制。
ValueAnimator 为动画的基类,它有一个子类ObjectAnimator。需要Interpolator和TypeEvaluator来计算属性值。
Interpolator 时间插入器,动画的运动速率,参见上一篇Tween Animation
TypeEvaluator Animator的工厂方法 of方法能创建属性为任何值类型的对象。TypeEvaluator就是用来计算属性值的
3.0以后新增了一些View的属性:
1)translationX 和 translationY:这两个属性控制了View所处的位置,
它们的值是由layout容器设置的,是相对于坐标原点(0,0左上角)的一个偏移量。
2)rotation, rotationX 和 rotationY:控制View绕着轴点(pivotX和pivotY)旋转。它的表现跟Tween Animation中的RotateAnimation不一致。
RotateAnimation 的旋转,表现为平面的旋转
而rotationX、Y 旋转,是立体的旋转,默认是以View的中心点,做x y的水平线,面向水平线进行翻转
3)scaleX 和 scaleY:控制View基于pivotX和pivotY的缩放。
4)pivotX 和 pivotY:旋转的轴点和缩放的基准点,默认是View的中心点。
5)x 和 y:描述了view在其父容器中的最终位置,是左上角左标和偏移量(translationX,translationY)的和。
6)aplha:透明度,1是完全不透明,0是完全透明。
以上这些属性与Tween Animation的动画属性值差不多
ObjectAnimator 对象动画
该动画,一次只能表示一个动作属性。
ObjectAnimator的xml实现
xml定义动画
res/animator/scale_object_animator.xml
- <?xml version="1.0" encoding="utf-8"?>
- <objectAnimator xmlns:android="http://schemas.android.com/apk/res/android"
- android:duration="2000"
- android:propertyName="scaleX"
- android:repeatCount="1"
- android:repeatMode="reverse"
- android:valueFrom="1.0"
- android:valueTo="2.0" >
-
- </objectAnimator>
代码加载 动画xml
- imageview_scale.setBackground(getResources().getDrawable(R.drawable.a11));
- ObjectAnimator scaleAnimator = (ObjectAnimator) AnimatorInflater.loadAnimator(this, R.animator.scale_object_animator);
- scaleAnimator.setTarget(imageview_scale);
- scaleAnimator.setDuration(1000);
- scaleAnimator.setRepeatCount(50);
- scaleAnimator.start();
AnimatorSet 动画集
由ObjectAnimator 和 ValueAnimator 组成,对应的xml中的写法 类似为 <set> <objectAnimator /> <animator />... </set>
xml定义动画
res/animator/set_rotate_scale.xml
- <?xml version="1.0" encoding="utf-8"?>
- <set xmlns:android="http://schemas.android.com/apk/res/android"
- android:ordering="together">
-
-
- <set>
- <objectAnimator
- android:propertyName="rotationX"
- android:repeatCount="50"
- android:repeatMode="reverse"
- android:valueFrom="0"
- android:valueTo="20" />
- <objectAnimator
- android:propertyName="rotationY"
- android:repeatCount="50"
- android:repeatMode="reverse"
- android:valueFrom="0"
- android:valueTo="45"
- android:valueType="floatType" />
- </set>
- <set>
- <objectAnimator
- android:propertyName="scaleX"
- android:repeatCount="50"
- android:repeatMode="reverse"
- android:valueFrom="1.0"
- android:valueTo="2.0" >
- </objectAnimator>
- <objectAnimator
- android:propertyName="scaleY"
- android:repeatCount="50"
- android:repeatMode="reverse"
- android:valueFrom="1.0"
- android:valueTo="2.0" >
- </objectAnimator>
- </set>
-
- </set>
代码加载 动画xml
- imageview_rotate.setBackground(getResources().getDrawable(R.drawable.a11));
- AnimatorSet animatorSet = (AnimatorSet) AnimatorInflater.loadAnimator(this, R.animator.set_rotate_scale);
- animatorSet.setTarget(imageview_rotate);
- animatorSet.setDuration(1000);
- animatorSet.setInterpolator(new BounceInterpolator());
- animatorSet.start();
PropertyValuesHolder
-
- PropertyValuesHolder pvhX = PropertyValuesHolder.ofFloat("scaleX",0f,2.5f);
- PropertyValuesHolder pvhY = PropertyValuesHolder.ofFloat("scaleY",0f,3f);
- ObjectAnimator animator = ObjectAnimator.ofPropertyValuesHolder(imageview, pvhX,pvhY);
- animator.setDuration(2000);
- animator.start();
APIDemo中的MultiPropertyAnimation示例:
-
-
- ball = balls.get(3);
-
- pvhY = PropertyValuesHolder.ofFloat("y", ball.getY(),
- getHeight() - BALL_SIZE);
- float ballX = ball.getX();
-
- Keyframe kf0 = Keyframe.ofFloat(0f, ballX);
- Keyframe kf1 = Keyframe.ofFloat(.5f, ballX + 100f);
- Keyframe kf2 = Keyframe.ofFloat(1f, ballX + 50f);
-
-
- PropertyValuesHolder pvhX = PropertyValuesHolder.ofKeyframe(
- "x", kf0, kf1, kf2);
-
-
- ObjectAnimator yxBouncer = ObjectAnimator
- .ofPropertyValuesHolder(ball, pvhY, pvhX).setDuration(
- DURATION / 2);
- yxBouncer.setRepeatCount(1);
- yxBouncer.setRepeatMode(ValueAnimator.REVERSE);
ViewPropertyAnimator
通过view.animate()来获取ViewPropertyAnimator
- imageview.setBackground(getResources().getDrawable(R.drawable.a11));
- ViewPropertyAnimator animate = imageview.animate();
-
- animate.alpha(0);
- animate.rotationX(50);
- animate.translationXBy(500);
- animate.scaleX(1.5f);
- animate.scaleY(1.5f);
- animate.setInterpolator(new BounceInterpolator());
- animate.setDuration(2000);
- animate.start();
ValueAnimator
ValueAnimator代码和xml设置中 没有setPropertyName 因为不是操作对象,只是根据value进行某种动作
需要加监听器,监听值的变化 做相应的处理
xml定义动画
- <?xml version="1.0" encoding="utf-8"?>
- <animator xmlns:android="http://schemas.android.com/apk/res/android"
- android:interpolator="@android:anim/accelerate_interpolator"
- android:duration="10000"
- android:startOffset="1000"
- android:repeatCount="infinite"
- android:repeatMode="restart"
- android:valueFrom="1"
- android:valueTo="100"
- android:valueType="intType">
-
- </animator>
代码加载 动画xml
- ValueAnimator valueAnimator = (ValueAnimator) AnimatorInflater.loadAnimator(this, R.animator.animator);
- valueAnimator.setTarget(tv_num);
- valueAnimator.setEvaluator(new TypeEvaluator<Integer>() {
-
- @Override
- public Integer evaluate(float fraction, Integer startValue, Integer endValue) {
- System.out.println("百分比,fraction:" + fraction);
- System.out.println("结果值:" + (int)((startValue + fraction * (endValue - startValue)) / 10 * 10));
- return (int)((startValue + fraction * (endValue - startValue)) / 10 * 10);
- }
- });
- valueAnimator.addUpdateListener(new AnimatorUpdateListener() {
-
- @Override
- public void onAnimationUpdate(ValueAnimator animation) {
-
- System.out.println("animation.getAnimatedValue()==" + animation.getAnimatedValue());
- tv_num.setText(animation.getAnimatedValue() + "");
- }
- });
-
- valueAnimator.start();
Animator的监听器
AnimatorListener
- new AnimatorListener() {
-
- @Override
- public void onAnimationStart(Animator animation) {
-
- }
-
- @Override
- public void onAnimationRepeat(Animator animation) {
-
- }
-
- @Override
- public void onAnimationEnd(Animator animation) {
-
- }
-
- @Override
- public void onAnimationCancel(Animator animation) {
-
- }
- }
AnimatorListenerAdapter
- new AnimatorListenerAdapter() {
-
- @Override
- public void onAnimationCancel(Animator animation) {
- super.onAnimationCancel(animation);
- }
-
- @Override
- public void onAnimationEnd(Animator animation) {
- super.onAnimationEnd(animation);
- }
-
- @Override
- public void onAnimationRepeat(Animator animation) {
- super.onAnimationRepeat(animation);
- }
-
- @Override
- public void onAnimationStart(Animator animation) {
- super.onAnimationStart(animation);
- }
-
- @Override
- public void onAnimationPause(Animator animation) {
- super.onAnimationPause(animation);
- }
-
- @Override
- public void onAnimationResume(Animator animation) {
- super.onAnimationResume(animation);
- }
-
- }
AnimatorUpdateListener
- new AnimatorUpdateListener() {
-
- @Override
- public void onAnimationUpdate(ValueAnimator animation) {
-
- System.out.println("animation.getAnimatedValue()==" + animation.getAnimatedValue());
- }
- }
一些操作函数:animator.pause();
animator.resume();
animator.reverse();
animator.end();
animator.cancel();
animator.start();animator.isStarted();animator.isPaused();animator.isRunning();
用属性动画换背景色
详见ApiDemo要下的 BouncingBalls.java
- private static final int RED = 0xffFF8080;
- private static final int BLUE = 0xff8080FF;
- private static final int CYAN = 0xff80ffff;
- private static final int GREEN = 0xff80ff80;
-
- {
-
- ObjectAnimator colorAnim = ObjectAnimator.ofInt(this, "backgroundColor", CYAN, BLUE, RED);
- colorAnim.setTarget(ll_animation);
- colorAnim.setEvaluator(new ArgbEvaluator());
- colorAnim.setRepeatCount(ValueAnimator.INFINITE);
- colorAnim.setRepeatMode(ValueAnimator.REVERSE);
- colorAnim.setDuration(3000);
- colorAnim.start();
- }
LayoutTransition
-
-
-
-
-
-
-
-
- LayoutTransition layoutTransition = new LayoutTransition();
- layoutTransition.setDuration(5000);
- layoutTransition.setAnimator(LayoutTransition.APPEARING, scaleAnimator);
- ll_animation.setLayoutTransition(layoutTransition);
-
- final TextView tv = new TextView(this);
- tv.setWidth(100);
- tv.setHeight(100);
- tv.setText("中华人民共和国");
- ll_animation.addView(tv);
-
- ll_animation.postDelayed(new Runnable() {
-
- @Override
- public void run() {
- ll_animation.removeView(tv);
- }
- }, 2000);
参考例子见:ApiDemos下的
LayoutAnimations.java