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Android Frame Animation: XML, Concepts and Optimization
Frame Animation Concepts: Cels, Framerate, and Resolution
动画的发展
cel-base animation
raster animation
bitmap
commonly called bitmap animation
not currently support Animated GIF
Optimizing Frame Animation: Color Depth and Frame Rate
three primary ways to optimize
reduce the resolution
reduce the color depth
and reduce the framerate
格式：PNG32,Png8
If you don’t need to composite your animation over other graphics, you can also consider using the lossy JPEG format to get a far smaller per-frame data foot print by throwing away some of the image data and resulting quality.
应该考虑硬件条件， 处理器及内存
Creating Frame Animation in Android Using XML Markup
Frame animation uses the drawable resource folder
animation (covered in Chapter 4) uses the /res/anim folder
AnimationDrawable
Android <animation-list> Tag: The Parent Frame Container
Android’s <item> Tag: Specifying Your Animation Frames
Creating a Frame Animation for our GraphicsDesign App
Instantiating the Frame Animation Definition Using Java
AnimationDrawable drawable = (AnimationDrawable) imageView.getDrawable();
drawable.start();
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