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On this lessons, you’ll use this Google android Studio room Format Publisher to create a page layout containing a text pack as well as a press button. Over the following tutorial, your family will enjoy your practical application respond to your press button tap by means of transmitting this article with the word container to another action.
The person program with an Operating system app was made having a bureaucracy of cool layouts ( ViewGroup physical objects) as well as icons ( Perspective objects). Styles tend to be hidden bins that will control just how its child views are placed on the watch’s screen. Icons will be UI parts like switches plus word containers.
Number Only two. Type of precisely how ViewGroup objects type branches inside the structure and also comprise Perspective objects
Android operating system provides an XML words pertaining to ViewGroup and think about sessions, consequently positioned on Urinary incontinence is defined in XML data files. On the other hand, in place of teaching you to jot down many XML, that session helps guide you to develop a structure using Google android Studio’s Format Program, rendering it all to easy to construct a structure through drag-and-dropping vistas.
Notice: This kind of lesson wants you’re using Google android Business A couple of.Three or more and up and you have put into practice the first sort lessons to create your own Android os undertaking.
Within Google android Studio’s Challenge windows, start request – res – structure – activity_main.xml.
To produce additional space for that Structure Program, obscure the job windowpane by simply picking out See – Instrument Glass windows – Project (and also just click Challenge within the quit side connected with Android operating system Studio).
When your publisher reveals the actual XML resource, go through the Style and design case in the bottom from the window.
Click on Indicate System consequently just the strategy structure are seen.
Be certain Exhibit Restrictions is actually about. The particular tooltip in the toolbar need to study Disguise Limits (as they are now exhibiting).
Ensure Autoconnect can be out of. The actual tooltip in the toolbar need to go through Start Autoconnect (which is at this point out of).
Click Go into default Rates in the toolbar and select Sixteen (you may still change this margin for each and every view later on).
Click Machine within Publisher in the toolbar decide on Pixel XL.
The actual Part Hardwood eye-port for the bottom-left part exhibits the actual layout’s pecking order connected with views. However, the cause check out can be a ConstraintLayout. that contain an individual TextView subject.
ConstraintLayout is a format that defines the task for each and every look at according to restrictions to help buddy ideas and also the mom or dad layout. By doing this, you can make the two easy and intricate styles with a chiseled look at hieararchy. That may be, that helps prevent the advantages of nested templates (some sort of page layout inside a layout, since found inside physique 2), which often can boost the moment needed to draw a User interface.
Notice a seems 16dp in the top of the parent or guardian design.
Notice a seems 16dp from your remaining of your father or mother layout.
Look at N seems to be 16dp to the proper involving go to a.
Watch W is arranged to the peak regarding view A.
Initially, you might want to get rid of precisely what is by now inside the design. Thus click on TextView while in the Part Sapling windows, after which touch Eliminate.
Through the Colour pallette home window around the still left, click on Written text inside the still left lite, then drag Plain Text message into the pattern program plus fall that on top of the layout. It becomes an EditText golf widget that will take plain text feedback.
Hit the check out from the style writer. Now you can start to see the resizing manages on each area (sqs), along with the confinement anchors on every section (bags).
For much better command, you may want to focus within the program in order to 75 or older using the control buttons present in the toolbar.
Click-and-hold a anchor topside facet, after which drag up until finally the idea snaps to the top in the format and also generate. Which is a constraintit stipulates the scene needs to be 16dp from the the surface of the structure (as you placed the normal prices for you to 16dp).
In the same manner, create a restriction in the left section on the see left part from the design and style.
On the Colour pallette window, simply click Gadgets inside the kept window pane, and then drag Control key in to the style author and shed it close to the ideal area.
Build a limitation on the eventually left facet in the button off to the right facet on the text message pack.
To help restrict the views inside of a flat conjunction, you have to generate a limit relating to the text message baselines. So go through the button, after which mouse click Normal Restriction, which seems inside layout program below the selected view. Your standard point would seem inside of the control key. Click-and-hold with this anchor and after that pull the item towards standard core seems from the wording common box.
Note: Also you can make a outside stance with all the bottom or top corners, nevertheless the switch includes support around its impression, hence the aesthetic alignment is usually incorrect for those who arrange these kinds of opinions like this.
Click Indicate Layout in the toolbar to survey the particular User interface. Notice that the words feedback is pre-filled with “Name” as well as key is branded “Button.” Consequently you will change these types of strings.
This can be a stringed sources data file it is possible to identify your entire UI guitar strings. The process means that you can handle just about all User interface post in a single area, that makes it simpler to find, upgrade, and localize (when compared to hard-coding post inside your design as well as software program code).
Simply click Amenable program near the top of the actual writer windows. This kind of unwraps the actual Translations Publisher. which supplies an effective program regarding incorporating as well as enhancing a person’s fall behind guitar strings, and enables maintain your turned guitar strings arranged.
Click Bring Critical for create a new stringed as being the “hint text” with the word common box.
Get into “edit_message” for that major identity.
Enter “Enter some sort of message” with the worth.
Simply click OK.
Create another major named “button_send” which has a valuation on “Send.Inches
You can now established these kind of guitar strings for every look at. So get back to the design file by means of visiting activity_main.xml within the hook club, and add the strings as follows:
Hit the text message pack from the page layout and also, when the Properties window seriously isn’t previously obvious for the suitable, simply click Qualities within the suitable sidebar.
Uncover a touch property or home then press Decide on a Learning resource off to the right of the text message pack. While in the dialogue seems, double-click with edit_message from the listing.
Nevertheless looking at the call pack attributes, as well remove the significance to the textual content home (currently placed for you to “Name”).

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Right now click the switch in the design and style, track down the text residence, press Pick a Reference. and after that pick out button_send.
To create a page layout that may be responsive to distinct tv screen sizes, you may now increase the risk for text message common box reach in order to fill most outstanding horizontal living space (following comprising the actual switch in addition to prices).
Produce a limitation in the correct facet in the button right area of the mother or father layout. This kind of right now defines the entire wider the fact that not one but two landscapes offer (which you’ll want to today fill up together with the textual content box).
Add a yalantis restriction with the correct aspect with the word pack left aspect from the option. It may well appear to be that is previously presently there, however they are truly including any bidirectional limit between the two views. And so either opinions are constrained to one another. Video clips a series (while indicated by your cycle betwen a vistas), and it lets some additional page layout solutions.
Available this Properties eye-port for that textual content common box and click on the fullness gauge till established to fit Restrictions. seeing that indicated by callout One physique Eight. “Match constraints” implies that the actual width is currently determined by this side restrictions plus profits. Hence, the writing box elongates for you to complete your side room.
On the other hand, both views tend to be split up by simply 32dp instead of 16dp, for the reason that both equally opinions have got rates. Consequently when still looking at the written text common box components, get a new suitable mark up to help Zero, since indicated by callout 2 within number 8-10.
Whether or not it seems your current design wouldn’t prove not surprisingly, just click listed below to see just what exactly the the XML could consider looking for instance and also examine the idea about the the thing is while in the Wording hook.
To read more pertaining to tirechains and all sorts of other activities that can be done having ConstraintLayout. understand Build a Reactive UI with ConstraintLayout.

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很久以前有两个程序,当时的水准都差不多,现在A是上市公司的技术总监,B还在不停的跳槽,反反复复在“小团队主程”和“大公司打杂”的两种岗位之间不停切换。B一直把这些不同归咎于自己没有遇到A那样子的机遇,经常在群里和微博抱怨自己的运气。

那天我终于忍不住了,在他再一次抱怨之后,我开始喷他,我说你就从来没有想过自己的原因么?同样是一个临时小活动,我叫A做的时候,A都会告诉我,他手上现在有什么,大概多久能做完,做完之后就可以做这个活动了。而你永远都是说现在很忙,什么时候做不完不知道,因为总有不可预知的东西,我们这些外行人问时间掐进度都是很愚蠢的。

同样在计算自己的开发时间的时候,A说三天做完就一定要三天做完,做不完的就会周六周日来加班,你说一周做完的工作能拖一个月,而且拖欠那么多工作还永远觉得无所谓,永远准时 6 点走人,质问你的时候,你还振振有词说没人付你加班费。

同样是手上的工作做完了,A会找我问有没有后继的工作,而你只会浪费贷款在那边看肥皂剧,直到有人发现你为止。

同样是大家吃完饭回来,A会立刻开始工作,你会一定要把剩下的午餐时间拿来玩一把游戏,逛一下淘宝。

同样是 QA 反馈问题,A会第一时间走到 QA 电脑前看具体表现,自己来找问题。你只会说“我不知道”,“我没办法”,“怎么可能”,“你看错了”,“你叫别人做吧”。

同样是主美觉得界面上的画面有出入,A要么到主美电脑前问具体原因,要么一副虚心学习的样子把主美拉到自己的电脑前讲解。你呢?你只会抱怨“早干嘛去了?”“早又不说”“这没差多少啊”

项目结项的时候,项目经理专门给A写了一封上千字的手写推荐信,还推荐A去 TX,你觉得这个机遇对A很重要,你没有得到项目经理的推荐,很不公平。难道你真的觉得是项目经理心血来潮随机抽几个人来写的么?你真的没有意识到,如果把你推荐到那些大团队去,推荐人的脸会被你丢光么?

你完全没有明白什么叫团队,什么叫态度。不是坐在一起就叫团队,不是不吵架就叫态度。

你的思想里面永远是——我拿这一点的薪水,那我只要做这一点的努力就好了。而A一直都是我现在只有这一点的薪水,但是我只要能多干额外的工作,早晚会有人给我更多的薪水。

是的,也许你的做法在你看来是完全正确的,你觉得你没有亏欠任何人,是别人没有给你机会给你平台,但是你完全没有想过——既然A这样的任劳任怨,努力学习的人在市场上,而且机会的总量又是有限的,那怎么可能会有人把机会给你而不给A呢?

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(1)不要随便显露你的情绪。

(2)不要逢人就诉说你的困难和遭遇

(3)在征询别人的意见之前,自己先思考,但不要先讲。

(4)不要一有机会就唠叨你的不满。

(5)重要的决定尽量有别人商量,最好隔一天再发布。

(6)讲话不要有任何的慌张,走路也是。

 

二,细心 :

(1)对身边发生的事情,常思考它们的因果关系。

(2)对做不到位的执行问题,要发掘它们的根本症结。

(3)对习以为常的做事方法,要有改进或优化的建议。

(4)做什么事情都要养成有条不紊和井然有序的习惯。

(5)经常去找几个别人看不出来的毛病或弊端。

(6)自己要随时随地对有所不足的地方补位。

 

三,胆识:

(1)不要常用缺乏自信的词句 。

(2)不要常常反悔,轻易推翻已经决定的事。

(3)在众人争执不休时,不要没有主见。

(4)整体氛围低落时,你要乐观、阳光。

(5)做任何事情都要用心,因为有人在看着你。

(6)事情不顺的时候,歇口气,重新寻找突破口,就结束也要干净利落。

 

四,大度:

(1)不要刻意把有可能是伙伴的人变成对手。

(2)对别人的小过失、小错误不要斤斤计较。

(3)在金钱上要大方,学习三施(财施、法施、无畏施)

(4)不要有权力的傲慢和知识的偏见。

(5)任何成果和成就都应和别人分享。

(6)必须有人牺牲或奉献的时候,自己走在前面。

 

五,诚信:

(1)做不到的事情不要说,说了就努力做到。

(2)虚的口号或标语不要常挂嘴上。

(3)针对客户提出的“不诚信”问题, 拿出改善的方法。

(4)停止一切“不道德”的手段。

(5)耍弄小聪明,要不得!

(6)计算一下产品或服务的诚信代 价,那就是品牌成本。

 

六,担当:

(1)检讨任何过失的时候,先从自身或自己人开始反省。

(2)事项结束后,先审查过错,再列述功劳。

(3)认错从上级开始,表功从下级启动

(4)着手一个计划,先将权责界定清楚,而且分配得当。

(5)对“怕事”的人或组织要挑明了说 。

Java程序员应该知道的10个调试技巧(转)

调试可以帮助识别和解决应用程序缺陷,在本文中,作者将使用大家常用的的开发工具Eclipse来调试Java应用程序。但这里介绍的调试方法基本都是通用的,也适用于NetBeans IDE,我们会把重点放在运行时上面。

在开始之前,推荐大家去看看Eclipse shortcuts这篇文章,它将会给你带来很多方便。在本文中使用的是Eclipse Juno版(Eclipse 4.2),在开始前给大家提3点建议!

  1. 不要使用System.out.println作为调试工具
  2. 把所有涉及到的组件日志级别激活并使用
  3. 使用日志分析器来读取日志

1.条件断点

如果你不知道如何添加断点,只需点击左边面板(行号前面)断点即被创建。在调试界面中,“断点”视图会把所有被创建的断点列出来。我们可以给它加一个布尔条件,也就是说,该断点会被激活并且如果布尔条件为真,就会执行该断点,否则将会跳过往下执行。

2.异常断点

在断点视图中,有一个J!标记按钮!我们可以使用该按钮来添加一个Java异常断点。例如,我们想让程序在遇到空指针异常(NullPointerException)时,仍然能继续调试,那么我们可以使用该按钮来添加一个异常断点!

3.监视点

这是一个非常好的功能,当选定的属性访问或修改程序时,程序会停止执行并允许进行调试。在Outline视图中选择一个类变量并从上下文菜单中选择切换监视点,属性监视点将会被创建,在断点(Breakpoints)视图中会把所有监视点用列表的形式显示出来。

4.评估/检查

按Ctrl+Shift+D或者Ctrl+Shift+I来显示选定变量或者表达式的值。我们也可以给一个变量或表达式添加永久观察点,当程序在调试时,这些观察点就会在表达式视图(Expression view)中显示出来。

5.修改变量值

在调试过程中,我们可以修改变量值。先选好一个变量然后进入变量视图(Variables view),根据变量类型在其对应的Value列里输入值即可。

6.在Main函数里面停止执行

在运行/调试设置中,编辑配置对话框中有“Main”这个选项卡,我们可以勾选“Stop in main”这个复选框。如果选中,那么在调试一个基于main方法的Java程序时,程序会在main方法第一行位置便停止执行。

7.环境变量

并不是在系统属性中添加环境变量,我们可以在编辑配置对话框中很方便地进行添加。

8.Drop to Frame

这也是我最喜欢的一个功能。调试期间,可以重新跳到调用堆栈框架的开始处执行,并且变量值也会回到最初。根据回档调整堆栈的深度,这个功能的主要用途是所有变量状态可以快速回到方法开始执行时候的样子,然后你可以重新进行一遍一遍执行,这样就可以在你关注的地方进行多次调试,但是在执行过程中也会产生一些副作用,比如插入到数据库里面的数据是无法删除的!

9.分布过滤

当我们进入(F5)方法的时候,我们还可以访问其外部库(比如java.*),我们可能不需要这个库,就可以在Perference选项卡页面添加一个过滤器来排除这个包。

10.进入、跳出和返回

我把这个放在最后一点,在调试过程中,这些是必须要了解(最好掌握)的东西:

F5——进入:移动到下一个步骤,如果当前行有一个方法调用,该控件将会跳转到被调用方法的第一行执行。

F6——跳出:移动到下一行。如果在当前行有方法调用,那么会直接移动到下一行执行。不会进入被调用方法体里面。

F7——返回:从当前方法中跳出,继续往下执行。

F8——移动到下一个断点处执行。

不管你有再多的兴趣爱好

不管你有再多的兴趣爱好,再多的社会关系,再深的对努力学习的厌恶之感。在你青春期的某一个时间点,你都会明白,学习的重要性高过所有。你要无欲则刚,你要学会孤独,你要把自己逼出最大的潜能,没有人会为了你的未来买单;你要么努力向上爬,要么烂在社会最底层的泥淖里。这就是生活

建议PHP组以后统一运用此框架开发应用-YAF

开发环境

yaf开发环境建议 lamp,目前yaf的最新版本为2.1.18(建议使用),php version 5.3+

apache 必须开启rewrite模块

yaf框架是基于C扩展写的,调试起来相对麻烦。建议你的开发环境中,php.ini应如下配置:

display_errors = on
log_errors = on
html_errors = on
error_reporting= E_ERROR | E_WARNING | E_PARSE | E_NOTICE

目录结构

+ public  //网站根目录
   - index.php //入口文件
   - .htaccess //重写规则    
+ conf
  |- application.ini //配置文件   
application/
  + controllers
     - Index.php //默认控制器
  + views    
     |+ index   //控制器
        - index.phtml //默认视图
  + modules //其他模块
  - library    //组件目录
  - models  //model目录
  - plugins //插件目录
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命名规范

同Pear命名规范,@see http://www.wzjs163.com/tangshan/knowledge/php/41.html#1

补充 :

变量命名,全小写字母,单词用下划线分割,非驼峰

类方法命名,采用驼峰命名

类命名,应注意类与父目录之间的关系, 通常“目录名_类名”,  目录首字母和类首字母大写, 例 “Base_Func”, 类文件存储位置为Base目录下的Func.php

部件(library)加载

      默认规则

yaf框架的默认设置是,只要是符合命名规则类,只要放在APPLICATION_PATH/library下的类目录都会被加载,因为此时的APPLICATION_PATH/library目录

为全局目录. 所以我们不需要去注册本地类。

      全局类

我们开发的时候,通常会遇到这样的情形。多个应用同时公用一些类,我们常常把这些类称为全局类。

为了使这些类得到统一管理,避免这些类的反复修改,我们通常会把这些类的全局空间里。

我们需在php.ini文件夹下做如下配置:

yaf.library=/var/www/yaf_global

这样,我们的全局空间默认的路径就在”/var/www/yaf_global”下了,所有存放在全局空间的类,符合yaf命名的规则类都将被加载

      本地类

本地类是指应用的自身类库.

我们要修改本地类的存放路径,只需在应用的配置文件增加:

application.library = 本地类空间的路径(绝对路径)

      Yaf_loader::import

      既然有了autoloader,那么什么时候我们需要使用Yaf_loader::import

第一种,你的类属于第三方类,也就是不属于YAF命名规范的

第二种,你的文件不是一个类,它可能只是一个存放很多方法的文件

第三种,你的文件没有存放在自动加载的空间里,你依然想使用

YAF单例模式类

Yaf_Application,  Yaf_Loader,  Yaf_Dispatcher, Yaf_Registry, Yaf_Session,这些类都是单例模式类。反之,其他类不是

你可以通过它们的getInstance() 来获取它们的单例,也可以通过Yaf_dispatcher::getXXX方法来获取实例

YAF 链式操作

     Yaf的很多类提供的api都是直接返回自身对象的,这样我们可以很方便的进行链式操作。

Yaf_Session::getInstance()->set('name', "alex")->set('sex',"男");

YAF 默认url访问规则

     Yaf默认开启的路由是static路由模式.

static路由模式的访问规则为,http://domain-name/module-name/controller-name/action-name/param1/value1…..

     如果你想切换路由模式,那么需在应用的配置文件增加:

application.dispatcher.defaultRouter =  默认的路由形式

Yaf默认的模块为Index, 默认的Controller为Index,默认的Action为Idex,这些你也可以通过框架进行配置更改

application.dispatcher.defaultController = 默认的控制器
application.dispatcher.defaultModule = 默认的模块
application.dispatcher.defaultAction = 默认的动作

YAF 路由

Yaf支持5种默认路由模式.  注:以下规则示例中省略了入口文件

static 路由(不支持参数映射), 访问规则

http://domain-name/module-name/controller-name/action-name/param1/value1…….

supervar 路由(不支持参数映射),访问规则

http://domain-name/?r=/module-name/controller-name/action-name/&param1=value1……

simple 路由(不支持参数映射),访问规则

http://domain-name/?m=module-name&c=controller-name&a=action-name http://domain-name/?m=module-name&c=controller-name&a=action-name&param1=value1……

rewrite 路由(支持参数映射),支持REST, 访问规则

@see http://yaf.laruence.com/manual/yaf.routes.static.html#yaf.routes.rewrite

regex 路由(支持参数映射),支持REST, 访问规则

@see  http://yaf.laruence.com/manual/yaf.routes.static.html#yaf.routes.regex

yaf 支持多种路由同时共存,是优点也是缺点. 假设情景路由只支持rewrite路由模式,而不支持regex路由,但这两种路由都存在,我们如何

用最有效的方法的去处理.代码如下

复制代码
class UserPlugin extends Yaf_Plugin_Abstract {

    public function routerShutdown(Yaf_Request_Abstract $request, Yaf_Response_Abstract $response) {
        $router = Yaf_Dispatcher::getInstance()->getRouter()->getCurrentRoute();
             if ($router == 'regex')  {
                   throw new Exception("not found page");
             }
    }
}
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另,配置路由的时候,请注意路由配置的顺序

Yaf 插件

yaf 插件主要用来增强Yaf框架功能,网上有人利用yaf的6个hook实现了YAF框架调试日志功能, 也有人利用插件实现了yaf的layout,

还有象上例实现路由的再次重定向,譬如我们可以通过IP段,UA,将请求重定向不同的模块,Controller,来处理

如何来写一个插件呢,我们只需写一个类去实现Yaf_Plugin_Abstract, 并将插件注册一下.

复制代码
class SamplePlugin extends Yaf_Plugin_Abstract {

    public function routerStartup(Yaf_Request_Abstract $request, Yaf_Response_Abstract $response) {
        //在路由之前触发
    }

    public function routerShutdown(Yaf_Request_Abstract $request, Yaf_Response_Abstract $response) {
        //路由结束之后触发
    }

    public function dispatchLoopStartup(Yaf_Request_Abstract $request, Yaf_Response_Abstract $response) {
        //分发循环开始之前触发    
    }

    public function preDispatch(Yaf_Request_Abstract $request, Yaf_Response_Abstract $response) {
        //分发之前触发
    }

    public function postDispatch(Yaf_Request_Abstract $request, Yaf_Response_Abstract $response) {
        //分发结束之后触发
    }

    public function dispatchLoopShutdown(Yaf_Request_Abstract $request, Yaf_Response_Abstract $response) {
        //分发循环结束之后触发
    }
}
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注册需在bootstrap进行

   public function _initPlugin(Yaf_Dispatcher $dispatcher) {
        //注册一个插件
        $sample_plugin = new SamplePlugin();
        $dispatcher->registerPlugin($sample_dplugin);
   }

 

Yaf 模块

模块的使用再日常开发的情景非常多.比如CMS 前台后后台,可以定义为Index和Admin,这样它们可以共用配置文件和library.而且url也更加友好。

开发过程中也能分模块开发.  我们可以把一个搜索栏目,拆为新闻模块,供应模块,求购模块,产品模块,公司模块。或者分得更细些

模块在Yaf中的配置

application.modules = admin,index

 

参考资料 

yaf.laruence.com/manual/

项目地址

https://github.com/laruence/php-yaf