Mobile Develop

Android Keyboard output add key codeNo need to increase or decrease the key code value during the development process, in the android2.3 System Event Processing Section,Mainly to the upper level to provide a unified key code (KEYCODE), this key code

For Android memory Overflow This problem, small series is a headache! Here's the idea of making your own!First memory references are divided into strong references, weak references, soft references, virtual references!A strong reference is an

According to the hierarchy structure of Android, performance optimization is also layered, this article will be application, Framework, Native, kernel each layer to summarize, each layer will mainly from the performance optimization of the basic

Program development often has the need to stop the thread running immediately, but through the API there is no way to achieve this purpose, so for this situation, we need to take some "special" way to achieve:1, the method of judging the sign:We

Interview Summary (iv) Realization of an ordered dictionaryImplementation method Press Nsdictionary key to sort it: Put the value of the dictionary into a dictionary, and key uses an ordered string, respectively. First the

1. ContextMenuAnimation experience a great Context MenuAndroid version: Https://github.com/Yalantis/Context-Menu.AndroidIOS version: Https://github.com/Yalantis/Context-Menu.iOS2. Side MenuThe animation experience is great Side MenuAndroid version:

Since the 10.2 release, I have been plagued by the Chinese annotations of ArcGIS Runtime SDK for Android. Whether it is a graphic text symbol residing in memory, or a new textsymbol in the offline geodatabase, it cannot be displayed as long as it is

recently in the process of doing the project, found that many of the interface of the project navigation bar is very similar or the same, but each time to repeat the same code, feel very uncomfortable, so simply customize the navigation bar control.

IOS 8 AutoLayout with size class self-awarenessSize Classios 8 AutoLayoutObjectiveIOS8 and IPhone6 release has been quite a long time, the vast number of fruit powder finally ushered in the big screen iphone, no longer tangled for the big screen to

Preparation of Knowledge:1. What is a library?A library is a collection of program code, a way to share program code2. Depending on the disclosure of the source code, the library can be divided into 2 typesA. Open Source LibraryOpen source code, can

In the common application development process often encountered the problem of abnormal flash, through the log can be related to the detailed error information record, this instance to record regardless of which page error is to be recorded, this

How much does object-c inherit? What's the substitute for nothing?All classes in cocoa are subclasses of NSObjectMulti-inheritance is implemented here using the protocol principal agent.You do not have to consider the concept of a cumbersome

Camediatiming is a protocol (protocol), Caanimation is the parent class of all animation classes, but it cannot be used directly, and its subclasses should be used.Inheritance Relationship:Coreanmiation Core Animation Shorthand CA Coreanimation

1. Sqlite3 the type of data storedNull: Identifies a null valueInterger: Integer typeREAL: Floating pointTEXT: StringBLOB: Binary number2, sqlite3 storage data constraint conditionsThe usual constraints for SQLite are as follows:PRIMARY Key-PRIMARY

One: the preparatory work1. What is git?Git is an open source, distributed version Control tool.Of all the distributed version control tools in the world, Git is the fastest, simplest, and most popular.Simple comparison of 2.git and SVNSpeedIn many

　　Preface: Good time did not write a blog, said recently very busy, feel like an excuse, every day or the same 24 hours, every day or the same 5:30 on time to work, every night there is a lot of free time ... The most immediate reason is that the

drawable, Bitmap, canvas, and paintIn addition to drawable in the Sun's j2me has appeared, but on the Android platform, Bitmap, canvas-related changes.First let's understand that the display class in the Android platform is view, but also provides

ObjectiveRemember to do the PC-side page, the font is generally set to Microsoft Ya Black, now do the mobile page, designers generally also set the font to Microsoft Ya Black font, but made out, when the test found that the font in the page is not

public void Onsensorchanged (Sensorevent event) { final float alpha = 0.8; GRAVITY[0] = Alpha * Gravity[0] + (1-alpha) * event.values[0]; GRAVITY[1] = Alpha * Gravity[1] + (1-alpha) * event.values[1]; GRAVITY[2

Underlying data type The types of Swift are proposed on the basis of C and objective-c, int is integer, double and float are floating-point types; bool is boolean; string is a string. Swift also has two useful collection types, array and