《Pro Android Graphics》读书笔记之第四节 _Graphics

亦余心之所善兮，虽九死其犹未悔。这篇文章主要讲述《Pro Android Graphics》读书笔记之第四节相关的知识，希望能为你提供帮助。
android Procedural Animation: : XML, Concepts and Optimization Procedural Animation Concepts: Tweens and Interpolators 【《Pro Android Graphics》读书笔记之第四节】Interpolator：http://developer.android.com/reference/android/animation/TimeInterpolator.html
Procedural Animation Data Values: Ranges and Pivot Point 范围和中心点

Procedural Animation Transforms: Rotate, Scale, Translatescale：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（须要很多其它内存）：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（须要很多其它计算）

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