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<!DOCTYPE html>
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<div class="row mx-auto index-card">
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<a href="/2022/01/02/blog_bak/Blog/C++/%E8%BF%99%E5%AD%A6JNI%EF%BC%8C%E5%A4%9A%E6%98%AF%E4%B8%80%E4%BB%B6%E7%BE%8E%E4%BA%8B%E5%95%8A/" target="_blank">
<img src="/cover/2.jpg" srcset="/img/loading.gif" lazyload alt="这学JNI，多是一件美事啊">
</a>
</div>
<article class="col-12 col-md-8 mx-auto index-info">
<h1 class="index-header">
<a href="/2022/01/02/blog_bak/Blog/C++/%E8%BF%99%E5%AD%A6JNI%EF%BC%8C%E5%A4%9A%E6%98%AF%E4%B8%80%E4%BB%B6%E7%BE%8E%E4%BA%8B%E5%95%8A/" target="_blank">
这学JNI，多是一件美事啊
</a>
</h1>
<p class="index-excerpt">
<a href="/2022/01/02/blog_bak/Blog/C++/%E8%BF%99%E5%AD%A6JNI%EF%BC%8C%E5%A4%9A%E6%98%AF%E4%B8%80%E4%BB%B6%E7%BE%8E%E4%BA%8B%E5%95%8A/" target="_blank">
JNI的定义JNI全称：Java Native Interface
它是Java本身的一种特性，用来在Java里面调用C/C++代码的。
看下面的一个程序：
12345public static void main(String[] args) throws Exception { PrintStream ps = new PrintStream(new FileOutputStr
</a>
</p>
<div class="index-btm post-metas">
<div class="post-meta mr-3">
<i class="iconfont icon-date"></i>
<time datetime="2022-01-02 00:00" pubdate>
2022-01-02
</time>
</div>
<div class="post-meta mr-3">
<i class="iconfont icon-category"></i>
<a href="/categories/C/">C++</a>
</div>
</div>
</article>
</div>
<div class="row mx-auto index-card">
<div class="col-12 col-md-4 m-auto index-img">
<a href="/2021/08/22/blog_bak/Blog/%E6%8A%98%E8%85%BE/%E7%8A%B6%E6%80%81%E9%97%AE%E9%A2%98/" target="_blank">
<img src="/cover/22.jpg" srcset="/img/loading.gif" lazyload alt="状态问题">
</a>
</div>
<article class="col-12 col-md-8 mx-auto index-info">
<h1 class="index-header">
<a href="/2021/08/22/blog_bak/Blog/%E6%8A%98%E8%85%BE/%E7%8A%B6%E6%80%81%E9%97%AE%E9%A2%98/" target="_blank">
状态问题
</a>
</h1>
<p class="index-excerpt">
<a href="/2021/08/22/blog_bak/Blog/%E6%8A%98%E8%85%BE/%E7%8A%B6%E6%80%81%E9%97%AE%E9%A2%98/" target="_blank">
4月份休假，5月份入职新公司，然后接近4个月没有更新博客了，一来确实是较之前忙了很多倍，二来也是自己懒，总觉得周末还不够自己休息的。
这个周末给自己定的目标就是把博客环境搭建起来，因为我之前一直使用移动硬盘来传博客，但是这个硬盘出了问题，所以就只能重新再搭建一个博客环境。本来是想用 ubuntu 的环境，但是不知道咋回事 ubuntu 也装不上了，想着再搞就要零点了，所以就在 windows 上搭
</a>
</p>
<div class="index-btm post-metas">
<div class="post-meta mr-3">
<i class="iconfont icon-date"></i>
<time datetime="2021-08-22 00:00" pubdate>
2021-08-22
</time>
</div>
<div class="post-meta mr-3">
<i class="iconfont icon-category"></i>
<a href="/categories/%E6%8A%98%E8%85%BE/">折腾</a>
</div>
</div>
</article>
</div>
<div class="row mx-auto index-card">
<div class="col-12 col-md-4 m-auto index-img">
<a href="/2021/06/13/blog_bak/Blog/C++/003-vscode%E7%8E%AF%E5%A2%83%E6%90%AD%E5%BB%BA/" target="_blank">
<img src="/cover/13.jpg" srcset="/img/loading.gif" lazyload alt="003-vscode环境搭建">
</a>
</div>
<article class="col-12 col-md-8 mx-auto index-info">
<h1 class="index-header">
<a href="/2021/06/13/blog_bak/Blog/C++/003-vscode%E7%8E%AF%E5%A2%83%E6%90%AD%E5%BB%BA/" target="_blank">
003-vscode环境搭建
</a>
</h1>
<p class="index-excerpt">
<a href="/2021/06/13/blog_bak/Blog/C++/003-vscode%E7%8E%AF%E5%A2%83%E6%90%AD%E5%BB%BA/" target="_blank">
距离上次写博客已经过了两个月了，第一个月在钓鱼，第二个月在适应新公司。
新公司确实比之前的要好，但是没有想象中的那么好，总之，还是朝着微软努力吧。
最近也升级了电脑的主板，由于操作的原因，导致了需要重装系统，所以各种环境还得再搭一遍。以前是按照别人的博客搭建的，现在自己按照官方文档搞了一下，发现超级简单。
下载 vscodehttps://code.visualstudio.com/
安装c+
</a>
</p>
<div class="index-btm post-metas">
<div class="post-meta mr-3">
<i class="iconfont icon-date"></i>
<time datetime="2021-06-13 00:00" pubdate>
2021-06-13
</time>
</div>
<div class="post-meta mr-3">
<i class="iconfont icon-category"></i>
<a href="/categories/C/">C++</a>
</div>
</div>
</article>
</div>
<div class="row mx-auto index-card">
<div class="col-12 col-md-4 m-auto index-img">
<a href="/2021/04/05/blog_bak/Blog/Git/002-Git%E7%9A%84%E7%9B%B8%E5%AF%B9%E5%BC%95%E7%94%A8/" target="_blank">
<img src="/cover/5.jpg" srcset="/img/loading.gif" lazyload alt="002-Git的相对引用">
</a>
</div>
<article class="col-12 col-md-8 mx-auto index-info">
<h1 class="index-header">
<a href="/2021/04/05/blog_bak/Blog/Git/002-Git%E7%9A%84%E7%9B%B8%E5%AF%B9%E5%BC%95%E7%94%A8/" target="_blank">
002-Git的相对引用
</a>
</h1>
<p class="index-excerpt">
<a href="/2021/04/05/blog_bak/Blog/Git/002-Git%E7%9A%84%E7%9B%B8%E5%AF%B9%E5%BC%95%E7%94%A8/" target="_blank">
headHEAD 是一个对当前检出记录的符号引用 —— 也就是指向你正在其基础上进行工作的提交记录。
HEAD 总是指向当前分支上最近一次提交记录。大多数修改提交树的 Git 命令都是从改变 HEAD 的指向开始的。
HEAD 通常情况下是指向分支名的（如 bugFix）。
当我们执行如下命令后，会发生什么：
1234git checkout C1git checkout maingit com
</a>
</p>
<div class="index-btm post-metas">
<div class="post-meta mr-3">
<i class="iconfont icon-date"></i>
<time datetime="2021-04-05 00:00" pubdate>
2021-04-05
</time>
</div>
<div class="post-meta mr-3">
<i class="iconfont icon-category"></i>
<a href="/categories/Git/">Git</a>
</div>
</div>
</article>
</div>
<div class="row mx-auto index-card">
<div class="col-12 col-md-4 m-auto index-img">
<a href="/2021/04/05/blog_bak/Blog/Git/001-Git%E5%B8%B8%E7%94%A8%E6%8C%87%E4%BB%A4%E5%9B%BE%E8%A7%A3/" target="_blank">
<img src="/cover/5.jpg" srcset="/img/loading.gif" lazyload alt="001-Git常用指令图解">
</a>
</div>
<article class="col-12 col-md-8 mx-auto index-info">
<h1 class="index-header">
<a href="/2021/04/05/blog_bak/Blog/Git/001-Git%E5%B8%B8%E7%94%A8%E6%8C%87%E4%BB%A4%E5%9B%BE%E8%A7%A3/" target="_blank">
001-Git常用指令图解
</a>
</h1>
<p class="index-excerpt">
<a href="/2021/04/05/blog_bak/Blog/Git/001-Git%E5%B8%B8%E7%94%A8%E6%8C%87%E4%BB%A4%E5%9B%BE%E8%A7%A3/" target="_blank">
内容全部基于 Learn Git Branching。
这是个网页版 Git 小游戏，很有意思的，希望大家可以花半天时间通关。
还有一个叫做 oh-my-git 的游戏也挺有意思。
git commit下图展示了一个（小型）Git 代码库（本地的）。当前有两个提交记录 —— 初始提交 C0 和其后可能包含某些有用修改的提交 C1。
然后，我们做一个 git commit操作，添加一个新提交
</a>
</p>
<div class="index-btm post-metas">
<div class="post-meta mr-3">
<i class="iconfont icon-date"></i>
<time datetime="2021-04-05 00:00" pubdate>
2021-04-05
</time>
</div>
<div class="post-meta mr-3">
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<a href="/categories/Git/">Git</a>
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<a href="/2021/03/13/blog_bak/Blog/Android-%E6%BA%90%E7%A0%81%E8%A7%A3%E6%9E%90/LeakCanary/0004-%E7%9C%9F%E6%AD%A3%E6%89%A7%E8%A1%8C%E7%9B%91%E6%B5%8B%E7%9A%84%E7%B1%BB/" target="_blank">
<img src="/cover/13.jpg" srcset="/img/loading.gif" lazyload alt="0004-真正执行监测的类">
</a>
</div>
<article class="col-12 col-md-8 mx-auto index-info">
<h1 class="index-header">
<a href="/2021/03/13/blog_bak/Blog/Android-%E6%BA%90%E7%A0%81%E8%A7%A3%E6%9E%90/LeakCanary/0004-%E7%9C%9F%E6%AD%A3%E6%89%A7%E8%A1%8C%E7%9B%91%E6%B5%8B%E7%9A%84%E7%B1%BB/" target="_blank">
0004-真正执行监测的类
</a>
</h1>
<p class="index-excerpt">
<a href="/2021/03/13/blog_bak/Blog/Android-%E6%BA%90%E7%A0%81%E8%A7%A3%E6%9E%90/LeakCanary/0004-%E7%9C%9F%E6%AD%A3%E6%89%A7%E8%A1%8C%E7%9B%91%E6%B5%8B%E7%9A%84%E7%B1%BB/" target="_blank">
上一篇我们分析了不少类，但是实际上它们做的工作主要是寻找监测点的工作，但是具体如何监测，都被委托给了 ReachabilityWatcher 这个接口。
这个接口只有一个实现了，就是 ObjectWatcher。
ObjectWatcher我们先看 expectWeaklyReachable 这个方法，毕竟，委托的时候，就是调用的这个方法。
leakcanary.ObjectWatcher#ex
</a>
</p>
<div class="index-btm post-metas">
<div class="post-meta mr-3">
<i class="iconfont icon-date"></i>
<time datetime="2021-03-13 00:00" pubdate>
2021-03-13
</time>
</div>
<div class="post-meta mr-3">
<i class="iconfont icon-category"></i>
<a href="/categories/LeakCanary/">LeakCanary</a>
</div>
<div class="post-meta">
<i class="iconfont icon-tags"></i>
<a href="/tags/Android%E6%BA%90%E7%A0%81%E8%A7%A3%E6%9E%90-LeakCanary/">Android源码解析-LeakCanary</a>
</div>
</div>
</article>
</div>
<div class="row mx-auto index-card">
<div class="col-12 col-md-4 m-auto index-img">
<a href="/2021/03/11/blog_bak/Blog/Android-%E6%BA%90%E7%A0%81%E8%A7%A3%E6%9E%90/LeakCanary/0002-%E8%87%AA%E5%8A%A8%E5%88%9D%E5%A7%8B%E5%8C%96/" target="_blank">
<img src="/cover/11.jpg" srcset="/img/loading.gif" lazyload alt="0002-自动初始化">
</a>
</div>
<article class="col-12 col-md-8 mx-auto index-info">
<h1 class="index-header">
<a href="/2021/03/11/blog_bak/Blog/Android-%E6%BA%90%E7%A0%81%E8%A7%A3%E6%9E%90/LeakCanary/0002-%E8%87%AA%E5%8A%A8%E5%88%9D%E5%A7%8B%E5%8C%96/" target="_blank">
0002-自动初始化
</a>
</h1>
<p class="index-excerpt">
<a href="/2021/03/11/blog_bak/Blog/Android-%E6%BA%90%E7%A0%81%E8%A7%A3%E6%9E%90/LeakCanary/0002-%E8%87%AA%E5%8A%A8%E5%88%9D%E5%A7%8B%E5%8C%96/" target="_blank">
源码版本 2.6
AS 版本 4.1.1
使用新版的使用就非常的简单了：
1234dependencies { // debugImplementation because LeakCanary should only run in debug builds. debugImplementation 'com.squareup.leakcanary:leakcanar
</a>
</p>
<div class="index-btm post-metas">
<div class="post-meta mr-3">
<i class="iconfont icon-date"></i>
<time datetime="2021-03-11 00:00" pubdate>
2021-03-11
</time>
</div>
<div class="post-meta mr-3">
<i class="iconfont icon-category"></i>
<a href="/categories/LeakCanary/">LeakCanary</a>
</div>
<div class="post-meta">
<i class="iconfont icon-tags"></i>
<a href="/tags/Android%E6%BA%90%E7%A0%81%E8%A7%A3%E6%9E%90-LeakCanary/">Android源码解析-LeakCanary</a>
</div>
</div>
</article>
</div>
<div class="row mx-auto index-card">
<div class="col-12 col-md-4 m-auto index-img">
<a href="/2021/03/11/blog_bak/Blog/Android-%E6%BA%90%E7%A0%81%E8%A7%A3%E6%9E%90/LeakCanary/0003-%E7%9B%91%E6%B5%8B%E9%A1%B5%E9%9D%A2%E4%B8%8EView%E6%98%AF%E5%90%A6%E6%B3%84%E9%9C%B2%E7%9A%84Watcher/" target="_blank">
<img src="/cover/11.jpg" srcset="/img/loading.gif" lazyload alt="0003-监测页面与View是否泄露的Watcher">
</a>
</div>
<article class="col-12 col-md-8 mx-auto index-info">
<h1 class="index-header">
<a href="/2021/03/11/blog_bak/Blog/Android-%E6%BA%90%E7%A0%81%E8%A7%A3%E6%9E%90/LeakCanary/0003-%E7%9B%91%E6%B5%8B%E9%A1%B5%E9%9D%A2%E4%B8%8EView%E6%98%AF%E5%90%A6%E6%B3%84%E9%9C%B2%E7%9A%84Watcher/" target="_blank">
0003-监测页面与View是否泄露的Watcher
</a>
</h1>
<p class="index-excerpt">
<a href="/2021/03/11/blog_bak/Blog/Android-%E6%BA%90%E7%A0%81%E8%A7%A3%E6%9E%90/LeakCanary/0003-%E7%9B%91%E6%B5%8B%E9%A1%B5%E9%9D%A2%E4%B8%8EView%E6%98%AF%E5%90%A6%E6%B3%84%E9%9C%B2%E7%9A%84Watcher/" target="_blank">
想要监测一个对象是否泄露，需要知道的是这个对象什么时候应该被销毁，然后再做相应的处理，所以第一个难点是如何找准这个销毁的时机。
下面我们具体分析源码，看它是如何做的。
所有的 Watcher 都在这个方法里面：
leakcanary.AppWatcher#appDefaultWatchers
1234567891011fun appDefaultWatchers( application
</a>
</p>
<div class="index-btm post-metas">
<div class="post-meta mr-3">
<i class="iconfont icon-date"></i>
<time datetime="2021-03-11 00:00" pubdate>
2021-03-11
</time>
</div>
<div class="post-meta mr-3">
<i class="iconfont icon-category"></i>
<a href="/categories/LeakCanary/">LeakCanary</a>
</div>
<div class="post-meta">
<i class="iconfont icon-tags"></i>
<a href="/tags/Android%E6%BA%90%E7%A0%81%E8%A7%A3%E6%9E%90-LeakCanary/">Android源码解析-LeakCanary</a>
</div>
</div>
</article>
</div>
<div class="row mx-auto index-card">
<div class="col-12 col-md-4 m-auto index-img">
<a href="/2021/03/06/blog_bak/Blog/%E6%8A%98%E8%85%BE/%E9%95%9C%E5%83%8F%E4%B8%8E%E4%BB%A3%E7%90%86%E9%97%AE%E9%A2%98/" target="_blank">
<img src="/cover/6.jpg" srcset="/img/loading.gif" lazyload alt="镜像与代理问题">
</a>
</div>
<article class="col-12 col-md-8 mx-auto index-info">
<h1 class="index-header">
<a href="/2021/03/06/blog_bak/Blog/%E6%8A%98%E8%85%BE/%E9%95%9C%E5%83%8F%E4%B8%8E%E4%BB%A3%E7%90%86%E9%97%AE%E9%A2%98/" target="_blank">
镜像与代理问题
</a>
</h1>
<p class="index-excerpt">
<a href="/2021/03/06/blog_bak/Blog/%E6%8A%98%E8%85%BE/%E9%95%9C%E5%83%8F%E4%B8%8E%E4%BB%A3%E7%90%86%E9%97%AE%E9%A2%98/" target="_blank">
Android Stuido 设置SDK镜像地址
打开设置界面，搜索 proxy
找到 HTTP Proxy 选项
在 Auto-detect proxy settings 里面填入镜像地址
Android Studio 设置本地代理（clash等）打开工程的 gradle.properties 文件：
12345678910111213systemProp.http.proxyHost=ww
</a>
</p>
<div class="index-btm post-metas">
<div class="post-meta mr-3">
<i class="iconfont icon-date"></i>
<time datetime="2021-03-06 00:00" pubdate>
2021-03-06
</time>
</div>
<div class="post-meta mr-3">
<i class="iconfont icon-category"></i>
<a href="/categories/%E6%8A%98%E8%85%BE/">折腾</a>
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</div>
</article>
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<div class="col-12 col-md-4 m-auto index-img">
<a href="/2021/03/04/blog_bak/Blog/flutter/010-Provider%E7%9A%84%E7%90%86%E8%A7%A3/" target="_blank">
<img src="/cover/4.jpg" srcset="/img/loading.gif" lazyload alt="Provider的理解">
</a>
</div>
<article class="col-12 col-md-8 mx-auto index-info">
<h1 class="index-header">
<a href="/2021/03/04/blog_bak/Blog/flutter/010-Provider%E7%9A%84%E7%90%86%E8%A7%A3/" target="_blank">
Provider的理解
</a>
</h1>
<p class="index-excerpt">
<a href="/2021/03/04/blog_bak/Blog/flutter/010-Provider%E7%9A%84%E7%90%86%E8%A7%A3/" target="_blank">
Provider 是官方推荐的状态管理框架。那么状态又是什么东西？在 Flutter 中，万物都是 Widget，Widget 又分为两种：
StatelessWidget（无状态）
StatefulWidget (有状态）
12345有些widgets是有状态的, 有些是无状态的如果用户与widget交互，widget会发生变化，那么它就是有状态的.widget的状态（state）是一些可
</a>
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<i class="iconfont icon-date"></i>
<time datetime="2021-03-04 00:00" pubdate>
2021-03-04
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<a href="/categories/Flutter/">Flutter</a>
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