《Pro Android Graphics》读书笔记之第四节
浏览数：25 /
时间：2015年06月11日
Android Procedural Animation: : XML, Concepts and Optimization
Procedural Animation Concepts: Tweens and Interpolators
Procedural Animation Data Values: Ranges and Pivot Point
范围和中心点
Procedural Animation Transforms: Rotate, Scale, Translate
scale：One of them involves size
rotation：involves orientation (which direction that something is facing)
translation：involves movement
Procedural Animation Compositing: Alpha Blending
Procedural Animation Timing: Using Duration and Offsets
Procedural Animation Loops: RepeatCount and RepeatMode
repeatCount interger（loop forever use infinite(-1)）
RepeatMode：restart (1)
reverse (2)
The <set> Tag: Using XML to Group Procedural Animation
android.view.animation
rule of thumb is to apply your transformational parameters locally
Procedural Animation vs. Frame Animation: The Trade-Off
Frame Animation
memory intensive（需要更多内存）：Displaying the image from memory onto the View is fairly straightforward and does not require any complex calculations, so all processing involves moving each frame’s image asset from memory over to display screen.
Procedural animation
tends to be more processing intensive（需要更多计算）
Creating a Procedural Animation Definition Using XML
Animation pagAni = AnimationUtils.loadAnimation(this, R.anim.pag_anim); （view）pag.startAnimation(pagAni);
Using Set to Create a More Complex Procedural Animation
Rotation Transformation: Going a Bit Too Far with FX
Tweaking Transform Values: The Ease of Adjusting XML
郑重声明：本站内容如果来自互联网及其他传播媒体，其版权均属原媒体及文章作者所有。转载目的在于传递更多信息及用于网络分享，并不代表本站赞同其观点和对其真实性负责，也不构成任何其他建议。
