Mobile Develop

iOS has the following three random number methods:1. Srand ((unsigned) time (0)); Without this sentence, the random number that is generated every time.int i = rand ()% 5;2. Srandom (Time (0));int i = random ()% 5;3. int i = arc4random ()% 5;Note:

First, IntroductionKVC/KVO is an implementation of the observer pattern, which is defined as part of the underlying framework in cocoa, in the form of nskeyvaluecoding/nskeyvalueobserving informal protocol implemented by the source NSObject class of

First, download and install OpenFire1. Download the latest OpenFire for Mac version to http://www.igniterealtime.org/downloads/index.jspFor example: OpenFire 3.8.1, downloaded files: openfire_3_8_1.dmg2. Click Install and perform the default action3.

This chapter uses intent to return the desired results;Process:Start the home page, press the button to start the second activity-> enter the user name, press the OK button, return the user name back to the home page, read the user name and display

Velocitytracker can get the rate of touch-screen events. steps to use:1. Get the Velocitytracker instance:Velocitytracker Mvelocitytracker = Velocitytracker.obtain ();2. Incorporate the Motionevent event into the

Parsing HTML using XPathYou can download the project from here Https://github.com/topfunky/hpple Tfhpple.h,tfhpple.m,tfhppleelement.h,tfhppleelement.m,xpathquery.h , XPATHQUERY.M add to your project, import libxml2.x in frameworksFind other Linker

Learn the basics of Android testing:Android Test IntroductionBlack Box Integration testWhite box testMockAndroid testing in depthTest Case Analysis and collectionCtsPerformance testingCombination of automated testing and project toolsAndroid Test

Solve the problem of TextView text display is not complete. Simply set the effect of the marquee: TextViewAndroid:id="@+id/textview" Android:layout_width="Match_parent" Android:layout_height="Wrap_content"

1. Memory leaks due to resource object not shutting downResource objects such as (cursor,file files, etc.) often use some buffering, we should close them in time when we are not in use, so that their buffers can recover memory in time. Their

Mobile phone font is originated from the Windows Mobile era, the so-called font is a close to the CPU near a very small flash chip, when the phone is mostly no operating system, mobile phone control information, font, etc. are cured to flash chip

Many times, there are some very simple needs, such as you use a button to pop up a page, after selecting an object, you will have some of the object's properties, such as the name, and so on, displayed on the button.and follow, and will think, can

http://acm.hdu.edu.cn/showproblem.php?pid=5119Happy Matt FriendsTime limit:6000/6000 MS (java/others) Memory limit:510000/510000 K (java/others)Total submission (s): 341 Accepted Submission (s): 130Problem Descriptionmatt has N friends. They is

The mobile internet has developed rapidly in recent years, while the number of Apple users is also growing rapidly, the application scope of iOS system is also more and more wide, the development of iOS talent is also more and more social needs, so

EditText et = (EditText) Findviewbyid (r.id.callnum); String phone = Et.gettext (). toString (). Trim ();//Create intent intent Intent = new intent (); Intent.setaction (intent. Action_call); Intent.setdata (Uri.parse ("Tel:" +phone)); StartActivity

SceneWhen we use the app, an app is opened, and if the app has a new version, it's often possible to give hints in the app if you want to update the app. So, let's take a look at how the version update is implemented.App Apple gives us an interface

In Android, a database is typically stored as a file on disk, and the memory database resides in memory, so it can be used as a caching technology scenario. So how does Android use SQLite's in-memory database?Look at the source of Sqlitedatabase:/** 

1, in the ANDROID4, initiates the network HTTP operation, cannot in the activity event (namely the main thread), must operate in the separate thread.In addition to the network operation, you need to add the following permissions in the manifest file:

How to use Ios--uibutton details(2013-08-23 17:20:38)reproduced Tags: ios uibutton button using detailed it Category: Ios--ui Common methods of UIButtonUIButton *onebutton = [UIButton

The configuration class is used to obtain information about the device on the phone, including user Configuration items and system dynamic settings. The following methods of activity can be obtained: Configuration cfg = getresource ().

first of all, we have to first know that object-c is a compiler, dynamic language (here is the emphasis on OC is a static type of language), which in the development of the language is and many, the general dynamic language is mostly interpreted