Mobile Develop

Problems encountered: 1) ANR 2) ListView, not smooth 3) activity start slow 4) animation is not smooth, pre-start stalling 5) Custom View start slow 6) OOM 7) Large number of database

1.Picasso IntroductionPicasso is a powerful image download and cache Gallery for the square company. The official website is:http://square.github.io/picasso/You can download the picture and set it to imageview with just one sentence of

Just started to learn cocos2-x, just follow the tutorial to the general Android has been installed in the development environment of the eclipse re-upgrade to install the CDT and the NDK took me dozens of hours, almost give up.Reference Blog

All mobile operating systems have a fatal disadvantage: apps are vulnerable to interruptions. For example, a call or lock screen will cause the app to enter the background or even be terminated there are many other similar situations that can cause

? Starting from IOS7, the system provides 2 ways to manage the status bar? Through Uiviewcontroller management (each uiviewcontroller can have its own different status bar)? Managed by UIApplication (the status bar of an application is unified by it)

1. All members of UIView UIView UIWindow (window)--Mounts The child view, inherits its OC class object to prompt the user UILabel (label)--equivalent to the label in HTML, more used to display text messages

Each application has a notification hub, Nsnotificationcenter, which is dedicated to assisting with message communication between different objectsAny object can publish notification nsnotification to the notification center, describing what it is

The main principles are:When the app launches, go to the server version number, compared to the current application if there is an update to downloadHere is the version information for the current appprivate void Getcurversion () { try {

Nsnotificationcenter can achieve a greater span of communication mechanisms than Delegate, which can communicate with two non-referencing two objects. The Nsnotificationcenter communication principle uses the observer pattern;1. Nsnotificationcenter

The solution is simple: Click the menu bar "Project", select "Clean", then click "OK", and when clean is complete, you will find that the APPCOMPAT_V7 package is wrong. The problem with the red warning in the test package has been resolved, except

Mainactivity as follows:Package Come.on;import Android.app.activity;import Android.content.context;import android.content.intent;import Android.os.bundle;import Android.view.view;import Android.view.view.onclicklistener;import Android.widget.Button;

tips: If you use the mobile terminal to read this article, please connect WiFi, read, there are a large number of pictures, so as not to cause you unnecessary loss. Diving Blog Park For many years, idle to have no matter, chat about their

first step: Make and gcc availableEnter make-vin the shell , no error is right. (Refer to http://wenku.baidu.com/view/d87586c24028915f804dc24a.html. ) ）Enter gcc-vin the shell , no error is right.Step Two: Install the NDK After you download the NDK

Ideas:Add one or more layers to the custom shape and stagger to show the shadow effect. To add three-dimensional sense, when the button is pressed, only one layer is set. we can control the direction and size of shadows by using top, bottom, right

Uitabelview: Common Properties@property (nonatomic) cgfloat rowHeight; Would return the default value if unset@property (nonatomic) cgfloat sectionheaderheight; Would return the default value if unset@property (nonatomic) cgfloat sectionfooterheight;

Print an object: NSLog (@ "%@", Stu); The name and memory address of the object that is printed by default, and the description method needs to be overridden// Override Description Method -(NSString *) description{ return [nsstring

[Uidevice currentdevice].batterymonitoringenabled = yes;double Devicelevel = [Uidevice currentDevice].batteryLevel;We usually use the above method to get the current remaining charge. This is also provided by Apple's official documentation.It

Some information on the Internet this content is outdated, here is the latest content, if not, please spit groove ...1) Download Baidu maps Mobile API (ANDROID) Development KitTo use the Baidu Map API in the Android app, you need to reference the

Disclaimer: This blog for the original blog, without permission, not reproduced! original link to http://blog.csdn.net/bettarwang/article/details/27819525Most of the screenshots most commonly used by most people may be using the phone's shortcut

arc in SDK4.0 added, the combination of arc and non-arc files will be combined with the previous project.Of course, in both cases:1. No arc was used for his old project, but the third-party library was introduced using arc.2. Your new project uses