https://flyfire.github.io/ Recent content on Solarex's Blog Hugo zh-cn Sun, 10 Nov 2024 16:24:09 +0800 https://flyfire.github.io/post/autodispose/ Sun, 10 Nov 2024 16:24:09 +0800 https://flyfire.github.io/post/autodispose/ https://flyfire.github.io/post/seven-ways-to-refactor-java-switch-statements/ Sat, 04 Feb 2023 21:16:50 +0800 https://flyfire.github.io/post/seven-ways-to-refactor-java-switch-statements/ 最近在浏览V2ex的时候发现一个帖子很有趣，Java 代码 switch 分支过多，怎么改写比较优雅呢？，在留言里面发现一篇文章，觉得挺好，转载在这。 Is a well-known https://flyfire.github.io/post/understanding-memory-reordering/ Fri, 09 Oct 2020 00:00:00 +0000 https://flyfire.github.io/post/understanding-memory-reordering/ 系列的第四篇~ In the previous article of this series, Lock-free multithreading with atomic operations, I introduced lock-free multithreading: a low-level strategy for synchronizing threads in concurrent software. Based upon atomic operations — machine instructions performed directly by the CPU that can’t be broken into smaller steps, lock-free multithreading provides a faster and more fine-tuned synchronization mechanism if compared to traditional primitives like mutexes and semaphores. https://flyfire.github.io/post/2019/10/07/que-sera-sera/ Mon, 07 Oct 2019 00:00:00 +0000 https://flyfire.github.io/post/2019/10/07/que-sera-sera/ Whatever will be,will be~ 国庆假期不想出去看人头，宅在家里吃老妈做的家乡菜，好惬意。 公司最近有点不太平，融的钱估计烧得差不多了，大家心照不宣，都在等靴子落地。 https://flyfire.github.io/post/2019/09/18/android-studio-proxy/ Wed, 18 Sep 2019 00:00:00 +0000 https://flyfire.github.io/post/2019/09/18/android-studio-proxy/ Android Studio 设置代理后gradle sync失败，解决方法。 今天到公司后，新需求下来了，同步代码，sync工程，开完晨会发现gradle sync失败了 https://flyfire.github.io/post/2019/08/12/singleton-pattern/ Mon, 12 Aug 2019 00:00:00 +0000 https://flyfire.github.io/post/2019/08/12/singleton-pattern/ 本文主要讲解单例模式的各种实现，以及对反射和反序列化攻击的防御。 单例模式的实现主要注意以下几点： 私有构造器 线程安全 延迟加载 序列化和反序列化安 https://flyfire.github.io/post/2019/08/10/lock-free-multithreading-with-atomic-operations/ Sat, 10 Aug 2019 00:00:00 +0000 https://flyfire.github.io/post/2019/08/10/lock-free-multithreading-with-atomic-operations/ 清空Reeder发现internal/pointers一系列关于多线程的文章，感觉很不错，转载在此。 这是系列第三篇，期待作者继续更新~ Synchronizing threads at https://flyfire.github.io/post/2019/08/09/introduction-to-thread-synchronization/ Fri, 09 Aug 2019 00:00:00 +0000 https://flyfire.github.io/post/2019/08/09/introduction-to-thread-synchronization/ 清空Reeder发现internal/pointers一系列关于多线程的文章，感觉很不错，转载在此。 这是系列第二篇。 A look at one of the most popular ways of concurrency control https://flyfire.github.io/post/2019/08/07/a-gentle-introduction-to-multithreading/ Wed, 07 Aug 2019 00:00:00 +0000 https://flyfire.github.io/post/2019/08/07/a-gentle-introduction-to-multithreading/ 清空Reeder发现internal/pointers一系列关于多线程的文章，感觉很不错，转载在此。 这是系列第一篇。 Approaching the world of concurrency, one step at a time. Modern computers https://flyfire.github.io/post/2019/08/04/java-threadpoolexecutor/ Sun, 04 Aug 2019 00:00:00 +0000 https://flyfire.github.io/post/2019/08/04/java-threadpoolexecutor/ 本文主要对Executor框架以及Java平台线程池技术进行分析。 Executor框架主要由3大部分组成： 任务。包括被执行任务需要实现的接口 https://flyfire.github.io/post/2019/08/01/java-blockingqueue/ Thu, 01 Aug 2019 00:00:00 +0000 https://flyfire.github.io/post/2019/08/01/java-blockingqueue/ 本文主要分析Java平台BlockingQueue的各个实现。 阻塞队列BlockingQueue是一个支持两个附加操作的队列。这两个附加的操 https://flyfire.github.io/post/2019/07/28/aqs/ Sun, 28 Jul 2019 00:00:00 +0000 https://flyfire.github.io/post/2019/07/28/aqs/ AbstractQueuedSynchronizer是很多并发工具类如ReentrantLock的实现基础，本文对其进行分析。 TL;DR 以下是对aq https://flyfire.github.io/post/2019/06/28/futuretask/ Fri, 28 Jun 2019 00:00:00 +0000 https://flyfire.github.io/post/2019/06/28/futuretask/ 本文主要对FutureTask源码进行分析。 Java中一般通过继承Thread类或实现Runnable接口来创建线程，但是这两种方式都有个缺 https://flyfire.github.io/post/2019/05/28/thread/ Tue, 28 May 2019 00:00:00 +0000 https://flyfire.github.io/post/2019/05/28/thread/ 本文主要分析Android平台上的Thread类源码，分为Java部分和native部分。 Java部分比较简单，大致过下各个方法吧。 线程创建 https://flyfire.github.io/post/2019/04/18/how-kotlin-generate-method-default-arguments/ Thu, 18 Apr 2019 00:00:00 +0000 https://flyfire.github.io/post/2019/04/18/how-kotlin-generate-method-default-arguments/ 学习Kotlin的时候，发现可以给方法设置默认参数，Java是不支持给方法设置默认参数的，那Kotin是如何实现的呢？不妨看下下面的kotl https://flyfire.github.io/post/2019/03/12/summary-of-custom-views-part-iii/ Tue, 12 Mar 2019 00:00:00 +0000 https://flyfire.github.io/post/2019/03/12/summary-of-custom-views-part-iii/ 自定义View总结 - 触摸反馈 之前分析了Android触摸事件分发机制，在自定义View的时候进行触摸反馈，一般都是重写onTouchEven https://flyfire.github.io/post/2019/02/12/summary-of-custom-views-part-ii/ Tue, 12 Feb 2019 00:00:00 +0000 https://flyfire.github.io/post/2019/02/12/summary-of-custom-views-part-ii/ 自定义View总结 - 布局 布局基础 布局过程，就是程序在运行时利用布局文件中的代码来计算出实际尺寸和位置的过程。有两个阶段，测量阶段和布局阶段， https://flyfire.github.io/post/2019/01/12/summary-of-custom-views-part-i/ Sat, 12 Jan 2019 00:00:00 +0000 https://flyfire.github.io/post/2019/01/12/summary-of-custom-views-part-i/ 自定义View总结 - 绘制 绘制基础 Canvas.drawColor(@ColorInt int color) 颜色填充 drawCircle(float centerX, float centerY, float radius, Paint paint) 画圆 Paint.setColor(int color),Paint.setStyle(Paint.Style style),Paint.setStrokeWidth(float width),Paint.setAntiAlias(boolean aa) drawRect(float left, float top, float right, float bottom, Paint paint) 画矩形 drawPoint(float x, float y, Paint paint) 画点 drawPoints(float[] pts, int offset, int count, Paint paint) / drawPoints(float[] pts, https://flyfire.github.io/post/2018/09/12/a-few-lately-thoughts/ Wed, 12 Sep 2018 00:00:00 +0000 https://flyfire.github.io/post/2018/09/12/a-few-lately-thoughts/ 最近项目不太忙，解bug的间隙把百合仙子最近几年的博客翻看了一下，想起很多往事，权且把应该放到饭否的一些碎碎念放到这里吧。 仙子现在还在坚持使 https://flyfire.github.io/post/2018/07/10/java-enum-syntactic-sugar/ Tue, 10 Jul 2018 00:00:00 +0000 https://flyfire.github.io/post/2018/07/10/java-enum-syntactic-sugar/ Java从1.5引入枚举类型，EffectiveJava第2版item 30也建议我们使用枚举来代替int常量。我们从下面的Enum示例中看下 https://flyfire.github.io/post/2018/07/02/analysis-of-hashmap/ Mon, 02 Jul 2018 00:00:00 +0000 https://flyfire.github.io/post/2018/07/02/analysis-of-hashmap/ HashMap是存储key-value的集合，底层采用Node<K,V>[] table实现，初始大小为2^4即16。 1 2 3 4 5 6 https://flyfire.github.io/post/2018/07/01/datastructure-and-algorithms/ Sun, 01 Jul 2018 00:00:00 +0000 https://flyfire.github.io/post/2018/07/01/datastructure-and-algorithms/ ArrayList 尾插效率高，支持随机访问 中间插入或者删除效率低 空间不够用时，自动增长为现有空间的1.5倍 底层使用Object数组来存储数据，使用Syste https://flyfire.github.io/post/2018/06/18/why-java-string-designed-as-final/ Mon, 18 Jun 2018 00:00:00 +0000 https://flyfire.github.io/post/2018/06/18/why-java-string-designed-as-final/ Reference Why String is Immutable or Final in Java https://flyfire.github.io/post/2018/05/30/recyclerview-smooth-scoll-to-position/ Wed, 30 May 2018 00:00:00 +0000 https://flyfire.github.io/post/2018/05/30/recyclerview-smooth-scoll-to-position/ 最近在做一个周日历的新需求，其中有个要求是要RecyclerView平滑的滑动到指定位置，刚开始的时候我以为只要调用smoothScroll https://flyfire.github.io/post/2018/04/26/java-proxy/ Thu, 26 Apr 2018 00:00:00 +0000 https://flyfire.github.io/post/2018/04/26/java-proxy/ Java代理有静态代理和动态代理之分。 静态代理 静态代理类图如下： ProxyObject持有RealObject的引用，在someOperat https://flyfire.github.io/post/2018/04/23/okhttp3-source-analysis/ Mon, 23 Apr 2018 00:00:00 +0000 https://flyfire.github.io/post/2018/04/23/okhttp3-source-analysis/ 周末在家断点调试了一下okhttp的执行流程，翻看了一下okhttp的源码，对okhttp有了一个大致的了解，在这记录一下。okhttp的精 https://flyfire.github.io/post/2017/10/18/develop-jni-program-in-mac/ Wed, 18 Oct 2017 00:00:00 +0000 https://flyfire.github.io/post/2017/10/18/develop-jni-program-in-mac/ 本文主要讲述如何在Mac开发环境下进行JNI开发。 首先编写好Java文件，示例程序主要示范了Java访问C，C访问Java静态与非静态域。 1 https://flyfire.github.io/post/2016/12/26/writing-better-adapters/ Mon, 26 Dec 2016 00:00:00 +0000 https://flyfire.github.io/post/2016/12/26/writing-better-adapters/ Implementing adapters is one of the most frequent tasks for an Android developer. It’s the base for every list. Looking at apps, lists are the base of most apps. The schema we follow to implement list views is often the same: a View with an adapter that holds the data. Doing this all the time can make us blind to what we are writing, even to ugly https://flyfire.github.io/post/2016/10/10/choreographer-in-android/ Mon, 10 Oct 2016 00:00:00 +0000 https://flyfire.github.io/post/2016/10/10/choreographer-in-android/ Choreographer is the one which acts like a interface between application view system and lower layer display system for rendering the views. ViewRootImpl is the ViewParent or root below which only Activity window DecorView will be attached. All the view layouts set by the activity through setContentView() will attached the DecorView whose parent is ViewRootImpl. Actually ViewRootImpl is not a View its just a ViewParent which handled and manages the View Hierarchies for displaying, handling input events etc. https://flyfire.github.io/post/2016/10/09/vsync-in-android/ Sun, 09 Oct 2016 00:00:00 +0000 https://flyfire.github.io/post/2016/10/09/vsync-in-android/ In Android What is VSYNC and its usage? VSYNC is the event posted periodically by the kernal at fixed interval where the input handling, Animation and Window drawing happening synchroniiously at the same VSYNC interval. Below have given the detail explanation about the VSYNC event before VSYNC is introduced and after VSYNC is introduced. Before VSYNC is introduced: Before VSYNC is introduced then there was no synchronization happening for Input, animation and draw. https://flyfire.github.io/post/2016/09/20/aspect-oriented-programming-in-android/ Tue, 20 Sep 2016 00:00:00 +0000 https://flyfire.github.io/post/2016/09/20/aspect-oriented-programming-in-android/ Aspect-oriented programming entails breaking down program logic into “concerns” (cohesive areas of functionality). This means, that with AOP, we can add executable blocks to some source code without explicitly changing it. This programming paradigm pretends that “cross-cutting concerns” (the logic needed at many places, without a single class where to implement them) should be implemented once and injected it many times into those places. Code injection becomes a very important part of AOP: it is useful for dealing with the mentioned “concerns” that cut across the whole application, such as logging or performance monitoring, and, using it in this way, should not be something used rarely as you might think, quite the contrary; every programmer will come into a situation where this ability of injecting code, could prevent a lot of pain and frustration. https://flyfire.github.io/post/2016/09/17/using-annotations-element-value-pairs-in-aspectj/ Sat, 17 Sep 2016 00:00:00 +0000 https://flyfire.github.io/post/2016/09/17/using-annotations-element-value-pairs-in-aspectj/ Annotations with element-value pairs Annotations by themselves are really powerful. They give direct control over when an aspect should be run to the developer. Adding element-value pairs makes the already powerful annotations even more powerful, since it enables you to pass information into the aspect. Description Creating an annotation with an element-value pair is in itself quite simple. It can take different parameters and it’s up to the aspect developer to use these in their aspects. https://flyfire.github.io/post/2016/09/16/defining-pointcuts-by-annotations/ Fri, 16 Sep 2016 00:00:00 +0000 https://flyfire.github.io/post/2016/09/16/defining-pointcuts-by-annotations/ Pointcuts by annotations Using annotations is more convenient than using patterns. While patterns might be anything between a big cannon and a scalpel the annotations are definitely a scalpel, by only getting the pointcuts that the developer has manually specified. You can get the code for this blog series at the Git repository here. Let’s start coding! Requirements: Maven, Java 8, (preferably) an IDE (I’m using IntelliJ) The use of annotations is a precise way to define when an aspect should be run. https://flyfire.github.io/post/2016/09/15/defining-pointcuts-by-pattern/ Thu, 15 Sep 2016 00:00:00 +0000 https://flyfire.github.io/post/2016/09/15/defining-pointcuts-by-pattern/ Pointcuts by pattern Going through all the different ways of defining pointcuts and explaining them in an easy manner would be a near impossible feat for this post. Rather than aiming for the impossible let’s narrow down the scope, and talk about the most commonly used pointcut definitions and how we can experiment with them. We will get you started with defining your own pointcuts! You can get the code for this blog series at the Git repository here. https://flyfire.github.io/post/2016/09/14/the-basics-of-aop/ Wed, 14 Sep 2016 00:00:00 +0000 https://flyfire.github.io/post/2016/09/14/the-basics-of-aop/ Aspect Oriented Programming AOP is both a complex and quite simple thing. There has been a lot of buzz around AOP but recently the buzz has faded. The question that people still ask is “what do I do with it”. Hopefully you will have an idea of what it is and create your own thoughts on how you could use it. In this post I aim to describe what AOP actually is and how it works. https://flyfire.github.io/post/2016/09/13/aspectj-dictionary/ Tue, 13 Sep 2016 00:00:00 +0000 https://flyfire.github.io/post/2016/09/13/aspectj-dictionary/ What is AOP Every time someone tries to explain AOP (Aspect Oriented Programming) they often use words like “magic” or “black magic”. And that’s understandable, especially if you come from an OOP world and come across AOP it really feels like “magic”: something is happening and you as a developer usually don’t know why, what or how. AspectJ is one of the more well-known implementations for AOP in Java and is developed by the Eclipse Foundation. https://flyfire.github.io/post/2016/05/28/make-an-android-custom-view-publish-and-open-source/ Sat, 28 May 2016 00:00:00 +0000 https://flyfire.github.io/post/2016/05/28/make-an-android-custom-view-publish-and-open-source/ Today I’m going to create an android custom view to implement circular SeekBar like the mockup below, make it as a library, open source at GitHub, and publish it to JCenter. In this post, I will cover several fundamental concepts of android custom view, write a helpful README on GitHub, and how to publish your library. Before you start… Try to understand the requirement or design specification, take a look at this widget first, the user can touch the indicator icon through this arc to set the current progress level. https://flyfire.github.io/post/2016/03/14/mobile-apps-offline-support/ Mon, 14 Mar 2016 00:00:00 +0000 https://flyfire.github.io/post/2016/03/14/mobile-apps-offline-support/ Offline support for mobile applications can be thought of as the ability for the application to react gracefully to the lack of stability of the network connection. The rather new context of mobile devices introduced problems such as presence or absence of a network connection or even high latency and low bandwidth. These problems are rather new and thus not very well known to engineers starting with mobile development. Among https://flyfire.github.io/post/2016/03/13/the-clean-architecture/ Sun, 13 Mar 2016 00:00:00 +0000 https://flyfire.github.io/post/2016/03/13/the-clean-architecture/ Over the last several years we’ve seen a whole range of ideas regarding the architecture of systems. These include: Hexagonal Architecture (a.k.a. Ports and Adapters) by Alistair Cockburn and adopted by Steve Freeman, and Nat Pryce in their wonderful book Growing Object Oriented Software. Onion Architecture by Jeffrey Palermo Screaming Architecture from a blog of mine last year DCI from James Coplien, and Trygve Reenskaug. BCE https://flyfire.github.io/post/2016/02/25/android-handler-memory-leaks/ Thu, 25 Feb 2016 00:00:00 +0000 https://flyfire.github.io/post/2016/02/25/android-handler-memory-leaks/ Android uses Java as a platform for development. This helps us with many low level issues including memory management, platform type dependencies, and so on. However we still sometimes get crashes with OutOfMemory. So where’s the garbage collector? I’m going to focus on one of the cases where big objects in memory can’t be cleared for a lengthy period of time. This case is not ultimately a memory leak - objects will be collected at some point - so we sometimes ignore it. https://flyfire.github.io/post/2016/02/12/recyclerview-animation-part-ii/ Fri, 12 Feb 2016 00:00:00 +0000 https://flyfire.github.io/post/2016/02/12/recyclerview-animation-part-ii/ In the first article, I’ve covered the main idea on how predictive animations run in RecyclerView. There is actually a lot more going on to achieve this simplicity (for the LayoutManager). Here are some important points that you should know about. RecyclerView keeps some children attached although they have been removed by the LayoutManager. How does it work? Does it invalidate the contract between the LayoutManager and RecyclerView? Yes it does ‘kind of’ violate the contract with LayoutManager, but: https://flyfire.github.io/post/2016/02/11/recyclerview-animation-part-i/ Thu, 11 Feb 2016 00:00:00 +0000 https://flyfire.github.io/post/2016/02/11/recyclerview-animation-part-i/ ListView is one of the most popular widgets of the Android Framework. It has many features, yet it is fairly complex and hard to modify. As the UX paradigms evolved and phones got faster, its limitations started to overshadow its feature set. With Lollipop, the Android team decided to release a new widget that will make writing different collection views much easier with a pluggable architecture. Many different behaviors can be controlled easily by implementing simple contracts to change: https://flyfire.github.io/post/2016/01/15/building-a-recyclerview-layoutmanager-part-iv/ Fri, 15 Jan 2016 00:00:00 +0000 https://flyfire.github.io/post/2016/01/15/building-a-recyclerview-layoutmanager-part-iv/ While writing what was intended to be the final post of this series, a discussion of predictive animations, I ran into a number of interesting challenges that I thought warranted their own discussion. This series began as an investigation into whether RecyclerView could easily handle a layout structure that could scroll in both the horizontal and vertical axes, and how difficult it would be for the developer to build their own LayoutManager. https://flyfire.github.io/post/2016/01/13/building-a-recyclerview-layoutmanager-part-iii/ Wed, 13 Jan 2016 00:00:00 +0000 https://flyfire.github.io/post/2016/01/13/building-a-recyclerview-layoutmanager-part-iii/ In the previous post, we discussed adding proper support for data set changes and targeted scrolling. In this installment of the series, we will focus on properly supporting animations in your fancy new LayoutManager.In case you’ve forgotten, the code samples are on GitHub. The Problem With Free We talked about notifyDataSetChanged() the last time, but you may have noticed that changing the data in this way doesn’t animate the change**. RecyclerView includes a new API for making animated changes, which requires you to notify the adapter which positions in the adapter have changed, and what the action was: https://flyfire.github.io/post/2016/01/11/building-a-recyclerview-layoutmanager-part-ii/ Mon, 11 Jan 2016 00:00:00 +0000 https://flyfire.github.io/post/2016/01/11/building-a-recyclerview-layoutmanager-part-ii/ In the last post, we walked through the core functionality necessary for building a RecyclerView LayoutManager. In this post, we are going to add support for a few additional features that the average adapter-based view is expected to have.A reminder that the entire sample application can be found here on GitHub. Supporting Item Decorations RecyclerView has a really neat feature in which an RecyclerView.ItemDecoration instance can be supplied to do custom drawing alongside the child view content, as well as provide insets (margins) that will apply to the child views without the need for modifying layout parameters. https://flyfire.github.io/post/2016/01/10/building-a-recyclerview-layoutmanager-part-i/ Sun, 10 Jan 2016 00:00:00 +0000 https://flyfire.github.io/post/2016/01/10/building-a-recyclerview-layoutmanager-part-i/ By now, if you’re an Android developer paying any attention, you’ve at least heard of RecyclerView; a new component that will be added to the support library to facilitate custom implementations of high-performance view collections by facilitating view recycling. Others have already done a remarkable job describing the basics of how to use RecyclerView with the built-in pieces already provided, including item animations. So rather than dive into all that again, here are some resources to get you up to speed: https://flyfire.github.io/post/2015/12/10/a-first-glance-at-recyclerview/ Thu, 10 Dec 2015 00:00:00 +0000 https://flyfire.github.io/post/2015/12/10/a-first-glance-at-recyclerview/ At this year’s Google I/O, Google released a preview to the upcoming Android version. The so called L Developer Preview. This is a very big improvement over previous releases and I really love that Google is doing this. I think we all benefit by this decision. As developers and as consumers alike! Part of this preview are two new views: RecyclerView and CardView. This post gives you an introduction to the RecyclerView, it’s many internal classes and interfaces, how they interact and how you can use them. https://flyfire.github.io/post/2015/11/23/android-starting-window/ Mon, 23 Nov 2015 00:00:00 +0000 https://flyfire.github.io/post/2015/11/23/android-starting-window/ I will never say it out loud enough: always do overwhelm your users with your mobile apps. One of the most important way to mind-blow your users is to polish what is usually called the first impression. Indeed, the first impression is essential if you want to catch your users’ attention. Contrary to what most people think, this process doesn’t start at the first launch of your application. It starts way before this when your potential users are looking at your app’s description, screenshots, icons, reviews, etc. https://flyfire.github.io/post/2015/11/23/saving-android-view-state/ Mon, 23 Nov 2015 00:00:00 +0000 https://flyfire.github.io/post/2015/11/23/saving-android-view-state/ Today we will talk about saving and restoring View states in Android. I intentionally want to keep our focus on Android Views state just because I found this process just a little bit trickier than saving your Activity or Fragment state. Plus I think I’ve seen enough of re-invented wheels (sometimes really ugly ones) throughout the internet. Why do we need to save View state? Very good question! I have very strong belief that mobile application should help you solve existing problems, not add new ones. https://flyfire.github.io/post/2015/09/22/android-message-handling-mechanism/ Tue, 22 Sep 2015 00:00:00 +0000 https://flyfire.github.io/post/2015/09/22/android-message-handling-mechanism/ Android is a message driven, message driven several elements: The message says: Message Message queue: MessageQueue The news cycle, remove the message processing for circulation: Looper Message processing, message loop out messages from the message queue should be carried out after the processing of messages: Handler Usually we use most often is Message and Handler, if you use HandlerThread or similar HandlerThread things may come into contact with Looper, while https://flyfire.github.io/post/2015/05/05/android-custom-view/ Tue, 05 May 2015 00:00:00 +0000 https://flyfire.github.io/post/2015/05/05/android-custom-view/ Subclass View onMeasure MeasureSpec setMeasureDimension onLayout layout(left, top, right, bottom) onDraw Canvas While viewgroups dont generally draw any content of their own,there are many situations where this could be useful,there are help instances where we can ask viewgroup to do some drawing.The first is inside the method dispatchDraw() after super.dispatchDraw has been called,at this stage,child views have already been drawn and we have an opportunity to do additional drawing on top. https://flyfire.github.io/post/2015/05/05/mac-dev-setup/ Tue, 05 May 2015 00:00:00 +0000 https://flyfire.github.io/post/2015/05/05/mac-dev-setup/ System preferences In Apple Icon > System Preferences: Trackpad > Tap to click Keyboard > Key Repeat > Fast (all the way to the right) Keyboard > Delay Until Repeat > Short (all the way to the right) Dock > Automatically hide and show the Dock Homebrew install command line tools xcode-select --install,xcode-select -p /Library/Developer/CommandLineTools to check if command line tools is installed install homebrew ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)" https://flyfire.github.io/post/2015/03/22/using-gnu-command-line-tools-on-mac-os-x/ Sun, 22 Mar 2015 00:00:00 +0000 https://flyfire.github.io/post/2015/03/22/using-gnu-command-line-tools-on-mac-os-x/ Unlike Ubuntu shipped with GNU command line tools,Mac OS X shipped with the BSD version,which make me WTF when I encountered with some compatibility issues.Fortunately,it's quit easy to install gnu tools by using homebrew in Mac OS X and set them as default. First comes with the most important one – GNU coreutils,which contains the most essential commands like ls,cat and bla,bla… brew install coreutils,and export PATH="$(brew --prefix)/opt/coreutils/libexec/gnubin:/usr/local/bin:$PATH",and add this alias to your . https://flyfire.github.io/post/2014/10/31/android-best-practices-for-background-jobs/ Fri, 31 Oct 2014 00:00:00 +0000 https://flyfire.github.io/post/2014/10/31/android-best-practices-for-background-jobs/ Background jobs best practices Running in a background service Loading data in the background Managing the device awake state Best Practices for Background Jobs These classes show you how to run jobs in the background to boost your application’s performance and minimize its drain on the battery. Running in a background service This class describes how to implement https://flyfire.github.io/post/2014/10/31/android-multithreading-in-a-ui-environment/ Fri, 31 Oct 2014 00:00:00 +0000 https://flyfire.github.io/post/2014/10/31/android-multithreading-in-a-ui-environment/ Why do we need multithreading in Android applications? Let’s say you want to do a very long operation when the user pushes a button.If you are not using another thread, it will look something like this: 1 2 3 4 5 6 7 8 9 ((Button)findViewById(R.id.Button01)).setOnClickListener( new OnClickListener() { @Override public void onClick(View v) { int result = doLongOperation(); updateUI(result); } }); What will happen?The UI freezes. This is a really bad UI experience. https://flyfire.github.io/post/2014/10/26/android-dealing-with-asynctask-and-screen-orientation/ Sun, 26 Oct 2014 00:00:00 +0000 https://flyfire.github.io/post/2014/10/26/android-dealing-with-asynctask-and-screen-orientation/ A common task in Android is to perform some background activity in another thread, meanwhile displaying a ProgressDialog to the user. Example of these tasks include downloading some data from internet, logging into an application, etc. Implementing an AsyncTask is fairly a simple job, the big challenge is how to handle it properly when an orientation change occurs. In this article I will walk though a series of potential solutions to address the screen orientation issues when using an AsyncTask. https://flyfire.github.io/post/2014/10/24/android-contentprovider/ Fri, 24 Oct 2014 00:00:00 +0000 https://flyfire.github.io/post/2014/10/24/android-contentprovider/ Android ContentProvider Content Provider Basics Using Content Providers Writing your own Content Provider Better Performance with ContentProviderOperation Android ContentProvider This is a tutorial covering Android’s ContentProvider. ContentProvider Basics What are content providers? Content providers are Android’s central mechanism that enables you to access data of other applications – mostly information stored in databases or flat files. As such content providers are one of Android’s central component types to support the modular approach common to Android. https://flyfire.github.io/post/2014/10/24/android-loader/ Fri, 24 Oct 2014 00:00:00 +0000 https://flyfire.github.io/post/2014/10/24/android-loader/ Android Loader Life before Loaders Understanding the LoaderManager Implementing Loaders Android Loader This post gives a brief introduction to Loaders and the LoaderManager. The first section describes how data was loaded prior to the release of Android 3.0, pointing out out some of the flaws of the pre-Honeycomb APIs. The second section defines the purpose of each class and summarizes their powerful ability in asynchronously loading data. Life before Loaders Before Android 3. https://flyfire.github.io/post/2014/10/19/android-asynctask-pitfalls/ Sun, 19 Oct 2014 00:00:00 +0000 https://flyfire.github.io/post/2014/10/19/android-asynctask-pitfalls/ I originally wrote this article when I was (foolishly) still using AsyncTasks. Nowadays I simply consider it a mistake in all cases. As you’ll see from the original article, there are a lot of problems with it - and there are much better solutions. My preferred alternative these days are combining RxJava with schedulers. You get the same effect as an AsyncTask with none of the problems, plus you get an awesome framework in addition. https://flyfire.github.io/post/2014/10/19/android-tips/ Sun, 19 Oct 2014 00:00:00 +0000 https://flyfire.github.io/post/2014/10/19/android-tips/ * [Android Tips and Tricks](#overview) * [Part I](#part1) * [Part II](#part2) * [Part III](#part3) * [Part IV](#part4) * [Part V](#part5) Android Tips and Tricks Part I Activity.startActivities() - Nice for launching to the middle of an app flow. TextUtils.isEmpty() - Simple utility I use everywhere. Html.fromHtml() - Quick method for formatting Html. It’s not particularly fast so I wouldn’t use it constantly (e.g., don’t use it just to bold part of a string - construct the Spannable manually instead), but it’s fine for rendering text obtained from the web. https://flyfire.github.io/post/2014/10/18/oauth-2-dot-0/ Sat, 18 Oct 2014 00:00:00 +0000 https://flyfire.github.io/post/2014/10/18/oauth-2-dot-0/ OAuth是一个关于授权（authorization）的开放网络标准，在全世界得到广泛应用，目前的版本是2.0版。本文对OAuth 2.0的设 https://flyfire.github.io/post/2014/10/17/java-singleton/ Fri, 17 Oct 2014 00:00:00 +0000 https://flyfire.github.io/post/2014/10/17/java-singleton/ 前序 单实例Singleton设计模式可能是被讨论和使用的最广泛的一个设计模式了，这可能也是面试中问得最多的一个设计模式了。这个设计模式主要目 https://flyfire.github.io/post/2014/10/14/android-context/ Tue, 14 Oct 2014 00:00:00 +0000 https://flyfire.github.io/post/2014/10/14/android-context/ Context is probably the most used element in Android applications…it may also be the most misused.Context objects are so common, and get passed around so frequently, it can be easy to create a situation you didn’t intend. Loading resources, launching a new Activity, obtaining a system service, getting internal file paths, and creating views all require a Context (and that’s not even getting started on the full list!) to accomplish the task. https://flyfire.github.io/post/2014/10/14/java-thread-tutorial/ Tue, 14 Oct 2014 00:00:00 +0000 https://flyfire.github.io/post/2014/10/14/java-thread-tutorial/ Java Thread and Multithreading Tutorial Java Thread Example Java Thread Sleep Java Thread Join Java Thread States Java Thread wait, notify and notifyAll Java Thread Safety and Java Synchronization Java Exception in thread main Thread Safety in Singleton Class Java Daemon Thread Java Thread Local Java Thread Dump How to Analyze Deadlock and avoid it in Java Java Timer Thread Java Producer Consumer Problem Java Thread Pool Java Callable Future https://flyfire.github.io/post/2014/10/13/android-looper-handler/ Mon, 13 Oct 2014 00:00:00 +0000 https://flyfire.github.io/post/2014/10/13/android-looper-handler/ What can you do with Loopers and Handlers? Basically, they implement a common concurrency pattern that I call the Pipeline Thread. Here’s how it works: The Pipeline Thread holds a queue of tasks which are just some units of work that can be executed or processed. Other threads can safely push new tasks into the Pipeline Thread’s queue https://flyfire.github.io/post/2014/10/13/android-main-thread/ Mon, 13 Oct 2014 00:00:00 +0000 https://flyfire.github.io/post/2014/10/13/android-main-thread/ When facing bugs that were related to how we interact with the main thread, I decided to get a closer look at what the main thread really is. 1 2 3 4 5 public class BigBang { public static void main(String... args) { // The Java universe starts here. } } All Java programs start with a call to a public static void main() method. This is true for Java Desktop programs, JEE servlet containers, and Android applications. https://flyfire.github.io/post/2014/10/12/android-decompile/ Sun, 12 Oct 2014 00:00:00 +0000 https://flyfire.github.io/post/2014/10/12/android-decompile/ 有时候在Google Play Store看到一些有趣的应用，或者对有些应用的资源图片之类的很感兴趣，这时候就需要用到Android反编译APK的一些 https://flyfire.github.io/post/2014/09/30/moving-bitbucket-repo-to-github/ Tue, 30 Sep 2014 00:00:00 +0000 https://flyfire.github.io/post/2014/09/30/moving-bitbucket-repo-to-github/ 1 2 3 4 5 6 git clone https://bitbucket.org/username/repos.git local_dir cd local_dir git remote rename origin bitbucket git remote add origin git@github.com:username/repos.git git push -u origin master git remote rm bitbucket https://flyfire.github.io/post/2014/09/21/android-guide-app-component/ Sun, 21 Sep 2014 00:00:00 +0000 https://flyfire.github.io/post/2014/09/21/android-guide-app-component/ TL,DR; Once installed on a device, each Android application lives in its own security sandbox: The Android operating system is a multi-user Linux system in which each application is a different user. By default, the system assigns each application a unique Linux user ID (the ID is used only by the system and is unknown to the application). The system sets permissions for all the files in an application so https://flyfire.github.io/post/2014/09/16/zhihu-intent-fileter-schema/ Tue, 16 Sep 2014 00:00:00 +0000 https://flyfire.github.io/post/2014/09/16/zhihu-intent-fileter-schema/ 之前使用浏览器浏览知乎网站时，网站上会显示打开应用，不同的浏览器点击会有不同的反应(跳转网页或者打开知乎应用)，当时思考了一下具体的实现方式 https://flyfire.github.io/post/2014/09/04/java-class-loaded-and-initialized/ Thu, 04 Sep 2014 00:00:00 +0000 https://flyfire.github.io/post/2014/09/04/java-class-loaded-and-initialized/ class loaded and initialized java -verbose:class -classpath . org.solarex.TestClassLoader get information about each class loaded.The “-verbose:class” option displays information about each class loaded. 1 2 3 4 5 6 package org.solarex.test; public class A{ public void method(){ System.out.println("inside of A"); } } 1 2 3 4 5 6 7 8 package org.solarex.test; public void TestLoader{ https://flyfire.github.io/post/2014/09/02/notes-on-git/ Tue, 02 Sep 2014 00:00:00 +0000 https://flyfire.github.io/post/2014/09/02/notes-on-git/ 起步 Git 和其他版本控制系统的主要差别在于，Git 只关心文件数据的整体是否发生变化，而大多数其他系统则只关心文件内容的具体差异。这类系统（CVS https://flyfire.github.io/post/2014/09/01/what-can-we-learn-from-hello-world/ Mon, 01 Sep 2014 00:00:00 +0000 https://flyfire.github.io/post/2014/09/01/what-can-we-learn-from-hello-world/ C version C版本的hello,world深入详解之前上学的时候在SlideShare上看到过，记得当时大呼过瘾，许多C深入理解的知识基本上都被罗列 https://flyfire.github.io/post/2014/06/02/checking-intent-availability/ Mon, 02 Jun 2014 00:00:00 +0000 https://flyfire.github.io/post/2014/06/02/checking-intent-availability/ Intents are probably Android’s most powerful tool. They tie together loosely coupled components and make it possible to start Activities that are not part of your own app. Using intents you can delegate to the Contacts app to select a contact or you can start the browser, share data and so on. The receiving apps declare intent filters which describe the intents its component react to. If you know which intent filters the app provides and if the components are publicly available you can start any Activity of any app on the users device. https://flyfire.github.io/post/2014/06/02/ssh-key-config-for-multi-github-accounts/ Mon, 02 Jun 2014 00:00:00 +0000 https://flyfire.github.io/post/2014/06/02/ssh-key-config-for-multi-github-accounts/ 在同一台电脑上有多个github账户时，切换ssh key会比较麻烦，可以使用ssh config来简化这一动作。 在使用ssh-keygen时， https://flyfire.github.io/projects/ Thu, 03 Apr 2014 21:37:31 +0800 https://flyfire.github.io/projects/ 自己动手写框架 网络处理框架 图片处理框架 面向对象数据库存储框架 运行时IOC框架 编译时IOC框架 Android JSON解析框架 模仿Android线程间通信机 https://flyfire.github.io/post/2013/12/24/recent-summary/ Tue, 24 Dec 2013 00:00:00 +0000 https://flyfire.github.io/post/2013/12/24/recent-summary/ 没有什么比漫无目的的徘徊更让人心烦意乱，消磨意志的了，最近就处于这样一种状态。Android开发基础已经基本上掌握了，但是高级点的技巧依然无 https://flyfire.github.io/post/2013/11/29/git-basic-config/ Fri, 29 Nov 2013 00:00:00 +0000 https://flyfire.github.io/post/2013/11/29/git-basic-config/ 用git大概有2年多了吧，不过大都停留在add，commit，clone，push这些简单的操作上，最近看了git-scm网站的维护者，Pr https://flyfire.github.io/post/2013/11/21/install-ubuntu-13-dot-04-on-macbook-pro-2011/ Thu, 21 Nov 2013 00:00:00 +0000 https://flyfire.github.io/post/2013/11/21/install-ubuntu-13-dot-04-on-macbook-pro-2011/ 之前已经在MacBook上装过Ubuntu了，不知怎么搞的，最近Ubuntu更新后，分辨率一直保持在1024×768，屏幕惨不忍睹，网上搜了 https://flyfire.github.io/about/ Sat, 27 Jul 2013 00:27:31 +0800 https://flyfire.github.io/about/ 𝓘𝓽’𝓼 𝓪𝓶𝓪𝔃𝓲𝓷𝓰 𝓳𝓾𝓼𝓽 𝓽𝓱𝓮 𝔀𝓪𝔂 𝔂𝓸𝓾 𝓪𝓻𝓮! 愛されたいと泣いているのは 人の温もりを知ってしまったから live a life you will remember I want https://flyfire.github.io/post/2012/07/27/blog-on-github/ Fri, 27 Jul 2012 00:00:00 +0000 https://flyfire.github.io/post/2012/07/27/blog-on-github/ Ubuntu下建立Octopress博客过程 首先安装git 1 sudo apt-get install git 安装rvm和ruby 1.9.3 1 curl -L https://get.rvm.io | bash -s stable --ruby=1.9.3 克隆octopress到本地 1 git