LayoutTransition 容器布局动画

在Property Animation中还有一个知识点没有讲到，那就是LayoutTransition容易布局动画，什么是容器布局动画？容器布局动画就是当一个布局

容器中的view方式改变时所产生的动画，比如：但一个相对布局中新增加一个view时或者删除一个view时，那么就可以通过一个动画来进行表现，

如：这个view是以什么形式增加进来或者删除出去。

android中提供了四种容器动画：

1、APPEARING: 动画所运行的项目出现在这个容器中时，即：view显示时的动画

2、CHANGE_APPEARING: 由于在这个容器总新增加了一个view，而导致原来的view位置发生改变所以会触发这个动画。

3、DISAPPEARING: view在这个容器中消失时触发的动画

4、CHANGE_DISAPPEARING: 由于在这个容器中移除了一个view，而导致原来的view位置发生改变所以会触发这个动画。

那么怎样使用呢？

1、创建LayoutTransition对象mTransitioner

2、创建动画

3、在xml文件中将相应布局的属性android:animateLayoutChanges="true"设置为true

4、将动画通过mTransitioner的setAnimator方法设置给mTransitioner

5、通过布局控件的setLayoutTransition方法将mTransitioner设置进去

下面就介绍其具体使用方法

public void serTransition(){mTransitioner = new LayoutTransition();setupCustomAnimations();ll.setLayoutTransition(mTransitioner);}    private void setupCustomAnimations() {        // 动画：CHANGE_APPEARING        // Changing while Adding        /*PropertyValuesHolder pvhLeft = PropertyValuesHolder.ofInt("left", 0, 1);        PropertyValuesHolder pvhTop = PropertyValuesHolder.ofInt("top", 0, 1);        PropertyValuesHolder pvhRight = PropertyValuesHolder.ofInt("right", 0,1);        PropertyValuesHolder pvhBottom = PropertyValuesHolder.ofInt("bottom",0, 1);        PropertyValuesHolder pvhScaleX = PropertyValuesHolder.ofFloat("scaleX",1f, 0f, 1f);        PropertyValuesHolder pvhScaleY = PropertyValuesHolder.ofFloat("scaleY",1f, 0f, 1f);                final ObjectAnimator changeIn = ObjectAnimator.ofPropertyValuesHolder(                this, pvhLeft, pvhTop, pvhRight, pvhBottom, pvhScaleX,pvhScaleY).                setDuration(mTransitioner.getDuration(LayoutTransition.CHANGE_APPEARING));                mTransitioner.setAnimator(LayoutTransition.CHANGE_APPEARING, changeIn);        changeIn.addListener(new AnimatorListenerAdapter() {            public void onAnimationEnd(Animator anim) {                View view = (View) ((ObjectAnimator) anim).getTarget();                view.setScaleX(1f);                view.setScaleY(1f);            }        });                // 动画：CHANGE_DISAPPEARING        // Changing while Removing        Keyframe kf0 = Keyframe.ofFloat(0f, 0f);        Keyframe kf1 = Keyframe.ofFloat(.9999f, 360f);        Keyframe kf2 = Keyframe.ofFloat(1f, 0f);        PropertyValuesHolder pvhRotation = PropertyValuesHolder.ofKeyframe(                "rotation", kf0, kf1, kf2);        final ObjectAnimator changeOut = ObjectAnimator                .ofPropertyValuesHolder(this, pvhLeft, pvhTop, pvhRight,pvhBottom, pvhRotation)                .setDuration(mTransitioner.getDuration(LayoutTransition.CHANGE_DISAPPEARING));                mTransitioner.setAnimator(LayoutTransition.CHANGE_DISAPPEARING,changeOut);                changeOut.addListener(new AnimatorListenerAdapter() {            public void onAnimationEnd(Animator anim) {                View view = (View) ((ObjectAnimator) anim).getTarget();                view.setRotation(0f);            }        });                // 动画：APPEARING        // Adding        ObjectAnimator animIn = ObjectAnimator.ofFloat(null, "rotationY", 90f,                0f).setDuration(mTransitioner.getDuration(LayoutTransition.APPEARING));        mTransitioner.setAnimator(LayoutTransition.APPEARING, animIn);        animIn.addListener(new AnimatorListenerAdapter() {            public void onAnimationEnd(Animator anim) {                View view = (View) ((ObjectAnimator) anim).getTarget();                view.setRotationY(0f);            }        });*/        // 动画：DISAPPEARING        // Removing        ObjectAnimator animOut = ObjectAnimator.ofFloat(null, "rotationX", 0f,90f).        setDuration(mTransitioner.getDuration(LayoutTransition.DISAPPEARING));        mTransitioner.setAnimator(LayoutTransition.DISAPPEARING, animOut);        animOut.addListener(new AnimatorListenerAdapter() {            public void onAnimationEnd(Animator anim) {                View view = (View) ((ObjectAnimator) anim).getTarget();                view.setRotationX(0f);            }        });    }

参考链接：http://www.cnblogs.com/mengdd/p/3305973.html

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