demo | 易学教程

WHERE to find Android “Fingerpaint” demo? (Android Studio era)

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问题 Many, many Android discussions focus on the (apparently, famous) Fingerpaint sample: https://stackoverflow.com/a/16650524/294884 Where do I get it, to use with Android Studio? .. 2014 http://developer.android.com/samples/index.html Or is it now just completely out of date and legacy? Thanks for any info Android Studio: it has NO folders, samples/ or the like............ There's a possibility the beloved SDK Manager, on Mac - Studio, could help? Would I have to go with the API11 folder? The

css 定位属性：position

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对于position一直存有一些疑惑,特别是相关联的z-index属性,更是有些摸不着头脑,今天好好学习一下position属性的各个值不同的表现形式语法： position：static | relative | absolute | fixed 默认值：static 取值： static：无特殊定位，对象遵循正常文档流。top，right，bottom，left等属性不会被应用 relative：对象遵循正常文档流，但将依据top，right，bottom，left等属性在正常文档流中偏移位置 absolute：对象脱离正常文档流，使用top，right，bottom，left等属性进行绝对定位。而其层叠通过z-index属性定义 fixed：对象脱离正常文档流，使用top，right，bottom，left等属性以窗口为参考点进行定位，当出现滚动条时，对象不会随着滚动。IE6及以下不支持此参数值说明：检索对象的定位方式。对应的脚本特性为position。兼容性：都支持，除IE6不支持fixed取值参数上面的说法比较全面，但是不易理解，我做了一个demo页面，从实例出发，一目了然，代码如下： View Code <!doctype html> <html lang="zh-CN"> <head> <meta charset="utf-8" />

What is a good gravatar example email?

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问题 I just made a demo after seeing a similar one in the Ember.js documentation that gets your gravatar based on your email. I’m currently using tomster@emberjs.com as the default but that seems wrong as it’s a React app. Does anybody know of a good default to use? 回答1: What is a good gravatar example email? AFAIK, there isn't one. The best idea is to invent a fictitious email address and register a Gravatar for it. Or "fake" it in your application, demo, whatever. Or use your own. Or if the

why in the API Demo's AlarmService_Service.java, it says“just sleep for 30 seconds” instead of 15 seconds?

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问题 I just looked through the AlarmService sample in the Android API Demo(API 8). When the AlarmManager in the AlarmService.java file use setRepeating() method to schedule the alarm, the service will create a new thread in the AlarmService_Service.java file. My question is: In the run() method of the mTask Runnable object, why it says "we will just sleep for 30 seconds."? My understanding is: the thread starts, and it waits/sleeps for 15 seconds(NOT 30 seconds), then this thread will be stop by

How to run the api level 14 demos on gingerbread and lower devices

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问题 When I create a new Android Sample Project from eclipse with api level 14, add the compatibility library and try to run it on my gingerbread device. It gave the following error : Error Inflating Class SwitchPreference I just commented the SwitchPreference from the preferences xml file and was able to run the api demos app. But the Fragment(and few others) demos were not available. Is this expected? should I have a device running api-14 to be able to see the Fragment demos? Am I missing

Caliburn Micro reference implementations

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问题 Can you suggest some good real live and not too simplistic implementations based on Caliburn Micro where the source code is available to study approaches to common problems and "best practises"? 回答1: Have you had a look at the Caliburn.Micro contest winners for 2010? I don't know if they are too simple for your needs, and how up to date the projects are in relation to changes in the framework since they were submitted, but you could try there. I'm not sure what common problems and best

Interpret text input as PHP

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问题 I want to let users test out a PHP class of mine, that among other things crops and resizes images. I want them to write PHP code in a text field, send the form, and then their code will be run. How can I do this? Or is it other safe ways to let users (anyone) demo a PHP class? 回答1: Yes. You can use the eval statement in php (linked earlier by John http://us2.php.net/manual/en/function.eval.php), however be very careful. You really don't want users to be able to run code on your machine

使用Log4net.dll库的demo（一）

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原文地址：http://blog.csdn.net/linraise/article/details/50547149 配置文件解析地址：http://blog.csdn.net/pfe_nova/article/details/12225349 注意： ConfigFile 可以指定相对路径和绝对路径。 eg: /log/xxxx.log 或者 d://log//xxxx.log 1.引入库log4net.dll 2.展开项目文件下的Properties文件夹，打开 AssemblyInfo.cs并在AssemblyInfo.cs中添加一行：在AssemblyInfo.cs中添加一行：(其中log4net.config对应配置文件名） 1 [assembly: log4net.Config.XmlConfigurator(ConfigFile = "log4net.config" , ConfigFileExtension = "config" , Watch = true )] 　　 3.添加log4net.config配置文件： 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 <?xml version= "1.0" encoding= "utf-8" ?>

How to create a transparent demo on Android?

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问题 I'm try to make a transparent activity in my Android application. This is an example picture: Does anyone know a library that can do this ? 回答1: It goes like this: <activity android:name=".usual.activity.Declaration" android:theme="@android:style/Theme.Translucent.NoTitleBar" /> This should help you. 来源： https://stackoverflow.com/questions/16616864/how-to-create-a-transparent-demo-on-android

SurfaceView sample code

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问题 I need a sample tutorial for the android SurfaceView , or sample code using it that can be shared. The API demos are difficult for me to understand. Does anyone have alternatives? 回答1: This commit of my WorldMap demo app shows you the changes necessary to convert from an android.view.View to an android.view.SurfaceView with an android.view.SurfaceHolder.Callback. It cheats a bit by using the View 's onDraw() from within the SurfaceView 's DrawThread and by calling the View 's onSizeChanged()