Android动画之初步(一)
Android Tweened Animation一共有四种
Alpha: 淡入淡出效果
Scale: 缩放效果
Rotate: 旋转效果
Translate:移动效果
使用Tweened Animations的步骤
1.创建一个AnimationSet对象
2.根据需要创建需要的Animation对象
3.根据软件动画的需要,为Animation对象设置相应的数据
4.将Animation对象添加到AnimationSet对象中
5.使控件对象开始执行AnimationSet
Alpha动画
[java]
AnimationSet as=new AnimationSet(true);
AlphaAnimation al=new AlphaAnimation(1,0);
//1代表完全不透明,0代表完全透明
al.setDuration(3000);
as.addAnimation(al);
iv.startAnimation(as);
AnimationSet as=new AnimationSet(true);
AlphaAnimation al=new AlphaAnimation(1,0);
//1代表完全不透明,0代表完全透明
al.setDuration(3000);
as.addAnimation(al);
iv.startAnimation(as);Rotate动画
[java]
AnimationSet as=new AnimationSet(true);
RotateAnimation al=new RotateAnimation (0,720,Animation.RELATIVE_TO_PARENT,0.5f,Animation.RELATIVE_TO_PARENT,0.5f);
//前两个参数参数旋转的角度,后面几个参数决定旋转的中心
//Animation.ABSOLUTE:绝对坐标
//Animation.RELATIVE_TO_PARENT:相对父控件
//Animation.RELATIVE_TO_SELF:相对自己
al.setDuration(3000);
as.addAnimation(al);
iv.startAnimation(as);
AnimationSet as=new AnimationSet(true);
RotateAnimation al=new RotateAnimation (0,720,Animation.RELATIVE_TO_PARENT,0.5f,Animation.RELATIVE_TO_PARENT,0.5f);
//前两个参数参数旋转的角度,后面几个参数决定旋转的中心
//Animation.ABSOLUTE:绝对坐标
//Animation.RELATIVE_TO_PARENT:相对父控件
//Animation.RELATIVE_TO_SELF:相对自己
al.setDuration(3000);
as.addAnimation(al);
iv.startAnimation(as);Scale动画
[java]
AnimationSet as=new AnimationSet(true);
ScaleAnimation al=new ScaleAnimation(0,1,0,1,Animation.RELATIVE_TO_SELF,0.5f,Animation.RELATIVE_TO_SELF,0.5f);
//前四个参数是X从多大到多大,Y从多大到多大,后面的参数是缩放的中心点
al.setDuration(3000);
as.addAnimation(al);
iv.startAnimation(as);
AnimationSet as=new AnimationSet(true);
ScaleAnimation al=new ScaleAnimation(0,1,0,1,Animation.RELATIVE_TO_SELF,0.5f,Animation.RELATIVE_TO_SELF,0.5f);
//前四个参数是X从多大到多大,Y从多大到多大,后面的参数是缩放的中心点
al.setDuration(3000);
as.addAnimation(al);
iv.startAnimation(as);
Translate动画
[java]
AnimationSet as=new AnimationSet(true);
TranslateAnimation al=new TranslateAnimation(Animation.RELATIVE_TO_SELF,0,Animation.RELATIVE_TO_SELF,2,Animation.RELATIVE_TO_SELF,0,Animation.RELATIVE_TO_SELF,2);
al.setDuration(3000);
as.addAnimation(al);
iv.startAnimation(as);
AnimationSet as=new AnimationSet(true);
TranslateAnimation al=new TranslateAnimation(Animation.RELATIVE_TO_SELF,0,Animation.RELATIVE_TO_SELF,2,Animation.RELATIVE_TO_SELF,0,Animation.RELATIVE_TO_SELF,2);
al.setDuration(3000);
as.addAnimation(al);
iv.startAnimation(as);
Animation还有几个方法
setFillAfter(boolean fillAfter)
如果fillAfter的值为真的话,动画结束后,控件停留在执行后的状态
setFillBefore(boolean fillBefore)
如果fillBefore的值为真的话,动画结束后,控件停留在动画开始的状态
setStartOffset(long startOffset)
设置动画控件执行动画之前等待的时间
setRepeatCount(int repeatCount)
设置动画重复执行的次数
补充:移动开发 , Android ,