Android性能测试之流畅度测试.docx

Android性能测试之流畅度测试.docx

《Android性能测试之流畅度测试.docx》由会员分享，可在线阅读，更多相关《Android性能测试之流畅度测试.docx（20页珍藏版）》请在冰豆网上搜索。

Android性能测试之流畅度测试

Android性能测试之流畅度测试

宋

体；mso-ascii-font-family:

Calibri;

mso-ascii-theme-font:

minor-latin;mso-fareast-font-family:

宋体;mso-fareast-theme-font:

minor-fareast;mso-hansi-font-family:

Calibri;mso-hansi-theme-font:

minor-latin">流畅度测试简单的来说就是Android

宋体;mso-ascii-font-family:

Calibri;mso-ascii-theme-font:

minor-latin;mso-fareast-font-family:

宋体;mso-fareast-theme-font:

minor-fareast;mso-hansi-font-family:

Calibri;mso-hansi-theme-font:

minor-latin">页面绘制。

Android

宋体;mso-ascii-font-family:

Calibri;mso-ascii-theme-font:

minor-latin;mso-fareast-font-family:

宋体;mso-fareast-theme-font:

minor-fareast;mso-hansi-font-family:

Calibri;mso-hansi-theme-font:

minor-latin">系统每秒60hz,

宋体;mso-ascii-font-family:

Calibri;

mso-ascii-theme-font:

minor-latin;mso-fareast-font-family:

宋体;mso-fareast-theme-font:

minor-fareast;mso-hansi-font-family:

Calibri;mso-hansi-theme-f

ont:

minor-latin">也就是大约每16ms

宋体;mso-ascii-font-family:

Calibri;

mso-ascii-theme-font:

minor-latin;mso-fareast-font-family:

宋体;mso-fareast-theme-font:

minor-fareast;mso-hansi-font-family:

Calibri;mso-hansi-theme-font:

minor-latin">刷新一次界面。

但是在我们使用APP

宋体;mso-ascii-font-family:

Calibri;

mso-ascii-theme-font:

minor-latin;mso-fareast-font-family:

宋体;mso-fareast-theme-font:

minor-fareast;mso-hansi-font-family:

Calibri;mso-hansi-theme-font:

minor-latin">过程中，经常会看到页面有卡顿，或者说丢帧的现象。

也就是说可能此刻两个页面绘制的时间差超过0.1S

宋

体；mso-ascii-font-family:

Calibri;mso-ascii-theme-font:

minor-latin;mso-fareast-font-family:

宋体;mso-fareast-theme-font:

minor-fareast;mso-hansi-font-family:

Calibri;mso-hansi-theme-font:

minor-latin">〔人眼视觉残留O.ISvspanstyle="font-family:

宋体;mso-ascii-font-family:

Calibri;

mso-ascii-theme-font:

minor-latin;mso-fareast-font-family:

宋体;mso-fareast-theme-font:

ont:

minor-latin">〕。

总的来说，就是页面

宋体;mso-ascii-font-family:

Calibri;mso-ascii-theme-font:

minor-latin;mso-fareast-font-family:

宋体;mso-fareast-theme-font:

minor-fareast;mso-hansi-font-family:

Calibri;mso-hansi-theme-font:

minor-latin">原理分析

宋体;mso-ascii-font-family:

Calibri;mso-ascii-theme-font:

minor-latin;mso-fareast-font-family:

宋体;mso-fareast-theme-font:

minor-fareast;mso-hansi-font-family:

Calibri;mso-hansi-theme-font:

minor-latin">在确定衡量指标之前，先来说Android

宋体;mso-ascii-font-family:

Calibri;mso-ascii-theme-font:

minor-latin;mso-fareast-font-famil

y:

宋体;mso-fareast-theme-font:

minor-fareast;mso-hansi-font-family:

Calibri;mso-hansi-theme-font:

minor-latin">的UI

宋

体；mso-ascii-font-family:

Calibri;mso-ascii-theme-font:

minor-latin;mso-fareast-font-family:

宋体;mso-fareast-theme-font:

minor-fareast;mso-hansi-font-family:

Calibri;mso-hansi-theme-f

ont:

minor-latin">更新机制。

宋体;mso-ascii-font-family:

Calibri;mso-ascii-theme-font:

minor-latin;mso-fareast-font-family:

宋体;mso-fareast-theme-font:

minor-fareast;mso-hansi-font-family:

Calibri;mso-hansi-theme-font:

minor-latin">在Android

宋体;mso-ascii-font-family:

Calibri;mso-ascii-theme-font:

minor-latin;mso-fareast-font-family:

宋体;mso-fareast-theme-font:

minor-fareast;mso-hansi-font-family:

Calibri;mso-hansi-theme-font:

minor-latin">版本更新过程中，发现在JellyBean

宋体;mso-ascii-font-family:

Calibri;mso-ascii-theme-font:

minor-latin;mso-fareast-font-family:

宋体;mso-fareast-theme-font:

minor-fareast;mso-hansi-font-family:

Calibri;mso-hansi-theme-font:

minor-latin">中Google

宋体；mso-ascii-font-family:

Calibri;mso-ascii-theme-font:

minor-latin;mso-fareast-font-family:

宋体;mso-fareast-theme-font:

minor-fareast;mso-hansi-font-family:

Calibri;mso-hansi-theme-font:

minor-latin">参加了一个ProjectButter

宋体;mso-ascii-font-family:

Calibri;mso-ascii-theme-font:

minor-latin;mso-fareast-font-family:

宋体;mso-fareast-theme-font:

minor-fareast;mso-hansi-font-family:

Calibri;mso-hansi-theme-font:

minor-latin">，用来解决严重影响Android

宋体;mso-ascii-font-family:

Calibri;mso-ascii-theme-font:

minor-latin;mso-fareast-font-family:

宋体;mso-fareast-theme-font:

minor-fareast;mso-hansi-font-family:

Calibri;mso-hansi-theme-font:

minor-latin">口碑的问题之一“UI

宋体;mso-ascii-font-family:

Calibri;mso-ascii-theme-font:

minor-latin;mso-fareast-font-family:

宋体;mso-fareast-theme-font:

minor-fareast;mso-hansi-font-family:

Calibri;mso-hansi-theme-font:

minor-latin">流畅性差〞的问题。

而ProjectButter

宋体;mso-ascii-font-family:

Calibri;mso-ascii-theme-font:

minor-latin;mso-fareast-font-family:

宋体;mso-fareast-theme-font:

minor-fareast;mso-hansi-font-family:

Calibri;mso-hansi-theme-font:

minor-latin">中主要引入了三个核心元素：

VSYNC（

宋体;mso-ascii-font-family:

Calibri;mso-ascii-theme-font:

minor-latin;mso-fareast-font-family:

宋体;mso-fareast-theme-font:

minor-fareast;mso-hansi-font-family:

Calibri;mso-hansi-theme-font:

minor-latin">垂直同步）

宋体；mso-ascii-font-family:

Calibri;

mso-ascii-theme-font:

minor-latin;mso-fareast-font-family:

宋体;mso-fareast-theme-font:

minor-fareast;mso-hansi-font-family:

Calibri;mso-hansi-theme-font:

minor-latin">、TripleBuffer

宋体;mso-ascii-font-family:

Calibri;mso-ascii-theme-font:

minor-latin;mso-fareast-font-family:

宋体;mso-fareast-theme-font:

minor-fareast;mso-hansi-font-family:

Calibri;mso-hansi-theme-font:

minor-latin">和Choreographer

宋体;mso-ascii-font-family:

Calibri;mso-ascii-theme-font:

minor-latin;mso-fareast-font-family:

宋体;mso-fareast-theme-font:

minor-fareast;mso-hansi-font-family:

Calibri;mso-hansi-theme-font:

minor-latin">。

VSync

宋体;mso-ascii-font-family:

Calibri;mso-ascii-theme-font:

minor-latin;mso-fareast-font-family:

宋

体;mso-fareast-theme-font:

minor-fareast;mso-hansi-font-family:

Calibri;

mso-hansi-theme-font:

minor-latin">是VerticalSynchronization（

宋体；mso-ascii-font-family:

Calibri;

mso-ascii-theme-font:

minor-latin;mso-fareast-font-family:

宋

体;mso-fareast-theme-font:

minor-fareast;mso-hansi-font-family:

Calibri;mso-hansi-theme-font:

minor-latin">垂直同步）

宋体;mso-ascii-font-family:

Calibri;

mso-ascii-theme-font:

minor-latin;mso-fareast-font-family:

宋

体;mso-fareast-theme-font:

minor-fareast;mso-hansi-font-family:

Calibri;mso-hansi-theme-font:

minor-latin">的缩写，是一种在PC

宋体;mso-ascii-font-family:

Calibri;

mso-ascii-theme-font:

minor-latin;mso-fareast-font-family:

宋

体;mso-fareast-theme-font:

minor-fareast;mso-hansi-font-family:

Calibri;mso-hansi-theme-font:

minor-latin">上很早就广泛使用的技术，可以简单的把它认为是一种定时中断。

而在Android4.1（JB）

宋体;mso-ascii-font-family:

Calibri;mso-ascii-theme-font:

minor-latin;mso-fareast-font-family:

宋体;mso-fareast-theme-font:

minor-fareast;mso-hansi-font-family:

Calibri;mso-hansi-theme-font:

minor-latin">中已经开始引入VSync

宋体;mso-ascii-font-family:

Calibri;mso-ascii-theme-font:

minor-latin;mso-fareast-font-family:

宋体;mso-fareast-theme-font:

minor-fareast;mso-hansi-font-family:

Calibri;mso-hansi-theme-f

ont:

minor-latin">机制。

CPU

宋

体；mso-ascii-font-family:

Calibri;mso-ascii-theme-font:

minor-latin;mso-fareast-font-family:

宋体;mso-fareast-theme-font:

minor-fareast;mso-hansi-font-family:

Calibri;mso-hansi-theme-font:

minor-latin">和GPU

宋体;mso-ascii-font-family:

Calibri;

mso-ascii-theme-font:

minor-latin;mso-fareast-font-family:

宋体;mso-fareast-theme-font:

minor-fareast;mso-hansi-font-family:

Calibri;mso-hansi-theme-font:

minor-latin">的处理时间都少于一个VSync

宋体;mso-ascii-font-family:

Calibri;mso-ascii-theme-font:

minor-latin;mso-fareast-font-family:

宋体;mso-fareast-theme-font:

minor-fareast;mso-hansi-font-family:

Calibri;mso-hansi-theme-font:

minor-latin">的间隔，即16.6ms

宋体;mso-ascii-font-family:

Calibri;mso-ascii-theme-font:

minor-latin;mso-fareast-font-family:

宋体;mso-fareast-theme-font:

minor-fareast;mso-hansi-font-family:

Calibri;mso-hansi-theme-font:

minor-latin">。

如果每个间隔都有绘制的情况下，当前的FPS

宋

体；mso-ascii-font-family:

Calibri;mso-ascii-theme-font:

minor-latin;mso-fareast-font-family:

宋体;mso-fareast-theme-font:

minor-fareast;mso-hansi-font-family:

Calibri;mso-hansi-theme-font:

minor-latin">即为60

宋体;mso-ascii-font-family:

Calibri;

mso-ascii-theme-font:

minor-latin;mso-fareast-font-family:

宋体;mso-fareast-theme-font:

minor-fareast;mso-hansi-font-family:

Calibri;mso-hansi-theme-font:

minor-latin">帧。

VSync

宋体;mso-ascii-font-family:

Calibri;mso-ascii-theme-font:

minor-latin;mso-fareast-font-family:

宋

体;mso-fareast-theme-font:

minor-fareast;mso-hansi-font-family:

Calibri;

mso-hansi-theme-font:

minor-latin">机制就像是播放动画片

（60

宋

体;mso-ascii-font-family:

Calibri;mso-ascii-theme-font:

minor-lat

in;

mso-fareast-font-family:

宋

体;mso-fareast-theme-font:

minor-fareast;mso-hansi-font-family:

Calibri;mso-hansi-theme-font:

minor-latin">帧/s）

宋

体;mso-ascii-font-family:

Calibri;mso-ascii-theme-font:

minor-lat

in;

mso-fareast-font-family:

宋

体;mso-fareast-theme-font:

minor-fareast;mso-hansi-font-family:

Calibri;mso-hansi-theme-font:

minor-latin">。

每次都会播放画面，有的时候有人偷懒了，机器坏了，就会出现播放速度降低的状况。

我们把这个播放速度叫做流畅度。

宋体;mso-ascii-font-family:

Calibri;mso-ascii-theme-font:

minor-latin;mso-fareast-font-family:

宋体;mso-fareast-theme-font:

minor-fareast;mso-hansi-font-family:

Calibri;mso-hansi-theme-font:

minor-latin">从FPS&

宋体;mso-ascii-font-family:

Calibri;mso-ascii-theme-font:

minor-latin;mso-fareast-font-family:

宋体;mso-fareast-theme-font:

minor-fareast;mso-hansi-font-family:

Calibri;mso-hansi-theme-font:

minor-latin">丢帧到流畅度