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<!DOCTYPE html>
<html lang="zh,en">
<!-- title -->
<!-- keywords -->
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=no">
<meta name="author" content="Gracker">
<meta name="renderer" content="webkit">
<meta name="copyright" content="Gracker">
<meta name="keywords" content="Android,Performance,AndroidPerformance,性能,优化,性能优化,Perf,Flutter,Linux,AndroidFramework,Framework,Android Performance,Flutter,Kotlin,Memory,内存,流畅性,卡顿,响应速度,Jank,Smooth,Android Framework,ANR,Crash,Dalvik,ART,Jetpack,Compose">
<meta name="description" content="Focus On Android Performance">
<meta name="description" content="你来到了没有知识的荒原 :(">
<meta property="og:type" content="website">
<meta property="og:title" content="Android Performance">
<meta property="og:url" content="https://androidperformance.com/404.html">
<meta property="og:site_name" content="Android Performance">
<meta property="og:description" content="你来到了没有知识的荒原 :(">
<meta property="og:locale">
<meta property="article:published_time" content="2023-04-02T13:53:58.656Z">
<meta property="article:modified_time" content="2018-09-12T12:18:26.000Z">
<meta property="article:author" content="Gracker">
<meta name="twitter:card" content="summary">
<meta http-equiv="Cache-control" content="no-cache">
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
<link rel="icon" href="/assets/favicon.ico">
<title>Android Performance</title>
<!-- /*! loadCSS. [c]2017 Filament Group, Inc. MIT License */
/* This file is meant as a standalone workflow for
- testing support for link[rel=preload]
- enabling async CSS loading in browsers that do not support rel=preload
- applying rel preload css once loaded, whether supported or not.
*/ -->
<script>
(function (w) {
'use strict'
// rel=preload support test
if (!w.loadCSS) {
w.loadCSS = function () {}
}
// define on the loadCSS obj
var rp = (loadCSS.relpreload = {})
// rel=preload feature support test
// runs once and returns a function for compat purposes
rp.support = (function () {
var ret
try {
ret = w.document.createElement('link').relList.supports('preload')
} catch (e) {
ret = false
}
return function () {
return ret
}
})()
// if preload isn't supported, get an asynchronous load by using a non-matching media attribute
// then change that media back to its intended value on load
rp.bindMediaToggle = function (link) {
// remember existing media attr for ultimate state, or default to 'all'
var finalMedia = link.media || 'all'
function enableStylesheet() {
link.media = finalMedia
}
// bind load handlers to enable media
if (link.addEventListener) {
link.addEventListener('load', enableStylesheet)
} else if (link.attachEvent) {
link.attachEvent('onload', enableStylesheet)
}
// Set rel and non-applicable media type to start an async request
// note: timeout allows this to happen async to let rendering continue in IE
setTimeout(function () {
link.rel = 'stylesheet'
link.media = 'only x'
})
// also enable media after 3 seconds,
// which will catch very old browsers (android 2.x, old firefox) that don't support onload on link
setTimeout(enableStylesheet, 3000)
}
// loop through link elements in DOM
rp.poly = function () {
// double check this to prevent external calls from running
if (rp.support()) {
return
}
var links = w.document.getElementsByTagName('link')
for (var i = 0; i < links.length; i++) {
var link = links[i]
// qualify links to those with rel=preload and as=style attrs
if (
link.rel === 'preload' &&
link.getAttribute('as') === 'style' &&
!link.getAttribute('data-loadcss')
) {
// prevent rerunning on link
link.setAttribute('data-loadcss', true)
// bind listeners to toggle media back
rp.bindMediaToggle(link)
}
}
}
// if unsupported, run the polyfill
if (!rp.support()) {
// run once at least
rp.poly()
// rerun poly on an interval until onload
var run = w.setInterval(rp.poly, 500)
if (w.addEventListener) {
w.addEventListener('load', function () {
rp.poly()
w.clearInterval(run)
})
} else if (w.attachEvent) {
w.attachEvent('onload', function () {
rp.poly()
w.clearInterval(run)
})
}
}
// commonjs
if (typeof exports !== 'undefined') {
exports.loadCSS = loadCSS
} else {
w.loadCSS = loadCSS
}
})(typeof global !== 'undefined' ? global : this)
</script>
<style type="text/css">
@font-face {
font-family: 'LXGWWenKaiMono-Regular';
src: url("/font/LXGWWenKaiMono-Regular.ttf");
}
body {
margin: 0;
}
header,
footer,
.back-top,
.sidebar,
.container,
.site-intro-meta,
.toc-wrapper {
display: none;
}
.site-intro {
position: relative;
z-index: 3;
width: 100%;
/* height: 50vh; */
overflow: hidden;
}
.site-intro-placeholder {
position: absolute;
z-index: -2;
top: 0;
left: 0;
width: calc(100% + 300px);
height: 100%;
background: repeating-linear-gradient(-45deg, #444 0, #444 80px, #333 80px, #333 160px);
background-position: center center;
transform: translate3d(-226px, 0, 0);
animation: gradient-move 2.5s ease-out 0s infinite;
}
@keyframes gradient-move {
0% {
transform: translate3d(-226px, 0, 0);
}
100% {
transform: translate3d(0, 0, 0);
}
}
</style>
<link rel="preload" href="/css/style.css?v=20211217" as="style" onload="this.onload=null;this.rel='stylesheet'">
<link rel="preload" href="/css/dark.css?v=20211217" as="style">
<link rel="stylesheet" href="/css/dark.css">
<link rel="stylesheet" href="/css/mobile.css?v=20211217" media="(max-width: 960px)">
<link rel="preload" href="https://cdn.jsdelivr.net/npm/@fancyapps/fancybox@3.5.7/dist/jquery.fancybox.min.css" as="style" onload="this.onload=null;this.rel='stylesheet'">
<link rel="preload" href="https://cdn.jsdelivr.net/npm/jquery@3.6.0/dist/jquery.min.js" as="script">
<link rel="preload" href="/scripts/main.js?v=20211217" as="script">
<link rel="preload" href="/scripts/dark.js?v=20211217" as="script">
<link rel="preload" href="/font/Oswald-Regular.ttf" as="font" crossorigin>
<link rel="preload" href="https://at.alicdn.com/t/font_327081_1dta1rlogw17zaor.woff" as="font" crossorigin>
<!-- algolia -->
<!-- 百度统计 -->
<!-- 谷歌统计 -->
<!-- Google tag (gtag.js) -->
<script async src="https://www.googletagmanager.com/gtag/js?id=G-TH31VMN7N9"></script>
<script>
window.dataLayer = window.dataLayer || [];
function gtag(){dataLayer.push(arguments);}
gtag('js', new Date());
gtag('config', 'G-TH31VMN7N9');
</script>
<meta name="generator" content="Hexo 6.3.0"><link rel="alternate" href="/atom.xml" title="Android Performance" type="application/atom+xml">
</head>
<script src="https://cdn.jsdelivr.net/npm/jquery@3.6.0/dist/jquery.min.js"></script>
<script type="text/javascript">
if (typeof window.$ == undefined) {
console.warn('jquery load from jsdelivr failed, will load local script')
document.write('<script src="/lib/jquery.min.js" />')
}
</script>
<body class="four-zero-four-body">
<!-- header -->
<header class="header header-mobile">
<!-- top read progress line -->
<div class="header-element">
<div class="read-progress"></div>
</div>
<!-- sidebar menu button -->
<div class="header-element">
<div class="header-sidebar-menu">
<div style="padding-left: 1px;"></div>
</div>
</div>
<!-- header actions -->
<div class="header-actions">
<!-- theme mode switch button -->
<span class="header-theme-btn header-element">
<i class="fas fa-adjust"></i>
</span>
<!-- back to home page text -->
<span class="home-link header-element">
<a href=/>Android Tech And Perf</a>
</span>
</div>
<!-- toggle banner for post layout -->
</header>
<!-- fixed footer -->
<footer class="footer-fixed">
<!-- back to top button -->
<div class="footer-fixed-element">
<div class="back-top back-top-hidden">
<div></div>
</div>
</div>
</footer>
<!-- wrapper -->
<div class="wrapper">
<div class="site-intro" style="
">
<!-- 主页 -->
<!-- about页 -->
<div class="site-intro-placeholder"></div>
<div class="site-intro-img" style="background-image: url(/intro/404-bg.jpg)"></div>
<div class="site-intro-meta">
<!-- 标题 -->
<h1 class="intro-title">
<!-- 主页 -->
[404]
<!-- about -->
</h1>
<!-- 副标题 -->
<p class="intro-subtitle">
<!-- 主页副标题 -->
你来到了没有知识的荒原 :(
</p>
<!-- 文章页 meta -->
</div>
</div>
<script>
// get user agent
function getBrowserVersions() {
var u = window.navigator.userAgent
return {
userAgent: u,
trident: u.indexOf('Trident') > -1, //IE内核
presto: u.indexOf('Presto') > -1, //opera内核
webKit: u.indexOf('AppleWebKit') > -1, //苹果、谷歌内核
gecko: u.indexOf('Gecko') > -1 && u.indexOf('KHTML') == -1, //火狐内核
mobile: !!u.match(/AppleWebKit.*Mobile.*/), //是否为移动终端
ios: !!u.match(/\(i[^;]+;( U;)? CPU.+Mac OS X/), //ios终端
android: u.indexOf('Android') > -1 || u.indexOf('Linux') > -1, //android终端或者uc浏览器
iPhone: u.indexOf('iPhone') > -1 || u.indexOf('Mac') > -1, //是否为iPhone或者安卓QQ浏览器
iPad: u.indexOf('iPad') > -1, //是否为iPad
webApp: u.indexOf('Safari') == -1, //是否为web应用程序，没有头部与底部
weixin: u.indexOf('MicroMessenger') == -1, //是否为微信浏览器
uc: u.indexOf('UCBrowser') > -1, //是否为android下的UC浏览器
}
}
var browser = {
versions: getBrowserVersions(),
}
console.log('userAgent: ' + browser.versions.userAgent)
// callback
function fontLoaded() {
console.log('font loaded')
if (document.getElementsByClassName('site-intro-meta')) {
document
.getElementsByClassName('intro-title')[0]
.classList.add('intro-fade-in')
document
.getElementsByClassName('intro-subtitle')[0]
.classList.add('intro-fade-in')
var postIntros = document.getElementsByClassName('post-intros')[0]
if (postIntros) {
postIntros.classList.add('post-fade-in')
}
}
}
// UC不支持跨域，所以直接显示
function asyncCb() {
if (browser.versions.uc) {
console.log('UCBrowser')
fontLoaded()
} else {
WebFont.load({
custom: {
families: ['LXGWWenKaiMono-Regular'],
},
loading: function () {
// 所有字体开始加载
// console.log('font loading');
},
active: function () {
// 所有字体已渲染
fontLoaded()
},
inactive: function () {
// 字体预加载失败，无效字体或浏览器不支持加载
console.log('inactive: timeout')
fontLoaded()
},
timeout: 5000, // Set the timeout to two seconds
})
}
}
function asyncErr() {
console.warn('script load from CDN failed, will load local script')
}
// load webfont-loader async, and add callback function
function async(u, cb, err) {
var d = document,
t = 'script',
o = d.createElement(t),
s = d.getElementsByTagName(t)[0]
o.src = u
if (cb) {
o.addEventListener(
'load',
function (e) {
cb(null, e)
},
false
)
}
if (err) {
o.addEventListener(
'error',
function (e) {
err(null, e)
},
false
)
}
s.parentNode.insertBefore(o, s)
}
var asyncLoadWithFallBack = function (arr, success, reject) {
var currReject = function () {
reject()
arr.shift()
if (arr.length) async(arr[0], success, currReject)
}
async(arr[0], success, currReject)
}
asyncLoadWithFallBack(
[
'https://cdn.jsdelivr.net/npm/webfontloader@1.6.28/webfontloader.min.js',
'https://cdn.bootcss.com/webfont/1.6.28/webfontloader.js',
"/lib/webfontloader.min.js",
],
asyncCb,
asyncErr
)
</script>
<img class="loading" src="/assets/loading.svg" style="display: block; margin: 6rem auto 0 auto; width: 6rem; height: 6rem;" />
<div class="container container-unloaded">
<!-- 不可以删除，否则会调用 post 的 layout -->
<!-- profile -->
</div>
<footer class="footer footer-unloaded">
<!-- social -->
<div class="social">
<a href="mailto:Dreamtale.jg@gmail.com" class="iconfont-archer email" title=email ></a>
<a href="https://github.com/gracker" class="iconfont-archer github" target="_blank" title=github></a>
<span class="iconfont-archer wechat" title=wechat>
<img class="profile-qr" src="/assets/Wechat.jpeg" />
</span>
<span class="iconfont-archer qq" title=qq>
<img class="profile-qr" src="/553000664" />
</span>
<a href="https://weibo.com/gracker520" class="iconfont-archer weibo" target="_blank" title=weibo></a>
<a href="https://www.zhihu.com/people/gracker" class="iconfont-archer zhihu" target="_blank" title=zhihu></a>
<a href="https://twitter.com/Gracker_Gao" class="iconfont-archer twitter" target="_blank" title=twitter></a>
<a href="https://juejin.im/user/557b0590e4b052e031453d76" class="iconfont-archer juejin" target="_blank" title=juejin></a>
<a href="/atom.xml" class="iconfont-archer rss" target="_blank" title=rss></a>
</div>
<!-- powered by Hexo -->
<div class="copyright">
<span id="hexo-power">Powered by <a href="https://hexo.io/" target="_blank">Hexo</a></span><span class="iconfont-archer power"></span><span id="theme-info">theme <a href="https://github.com/fi3ework/hexo-theme-archer" target="_blank">Archer</a></span>
</div>
<!-- website approve for Chinese user -->
<div class="website-approve">
<span id="icp-approve" class="icp-approve">
<a href="https://beian.miit.gov.cn/" target="_blank">蜀 ICP 备 20016190 号</a>
</span>
</div>
<!-- 不蒜子 -->
<div class="busuanzi-container">
<span id="busuanzi_container_site_pv">PV: <span id="busuanzi_value_site_pv"></span> :)</span>
</div>
</footer>
</div>
<!-- toc -->
<!-- sidebar -->
<div class="sidebar sidebar-hide">
<ul class="sidebar-tabs sidebar-tabs-active-0">
<li class="sidebar-tab-archives"><span class="iconfont-archer"></span><span class="tab-name">Archive</span></li>
<li class="sidebar-tab-tags"><span class="iconfont-archer"></span><span class="tab-name">Tag</span></li>
<li class="sidebar-tab-categories"><span class="iconfont-archer"></span><span class="tab-name">Cate</span></li>
</ul>
<div class="sidebar-content sidebar-content-show-archive">
<div class="sidebar-panel-archives">
<!-- 在 ejs 中将 archive 按照时间排序 -->