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