Usage of Singleton mode in IOS development

//// UserContext.h// SingleDemo//// Created by andyyang on 9/30/13.// Copyright (c) 2013 andyyang. All rights reserved.//#import @interface UserContext : NSObject@property (nonatomic,retain) NSString *username;@property(nonatomic,retain)NSString

I recommend some learning materials about Android.

Android programs are developed based on the JAVA language. Therefore, you must have a certain JAVA foundation for Android development, this JAVA programming idea is a classic Thinking in Java tutorial written by foreigners. It has now become the

Relationship between NSDate display and Time Zone

You can see a blog post about NSDate on the Internet. In its "NSDate initialization" section, when using NSLog (@ "current time date = % @", [NSDate date, the displayed time is not the time in your own time zone. It is 8 hours smaller than ours.

StartActivityResult, setResult, finish, onActivityRes in Activity

I: II 1: public void selectName(View view){Intent intent = new Intent(this,NameListActivity.class);startActivityForResult(intent, 1);}public void selectName2(View view){Intent intent = new

Key points for developing Android desktop widgets (time and date widgets)

In general, the main function of widgets is to display some information. Today, we write a simple widget that displays the time, date, day of week, and other information. To display the time information, you need to update it in real time, one

Android uses onDraw to implement plotting in View.

The following is a detailed analysis of the sample code for using onDraw to draw images in a View on Android. The Android plotting operation is implemented by inheriting the View and implementing the plotting in the onDraw function.The following is

ASP-Based Access Database Security Policy

This is a professional but safe practice. It is also a popular practice. However, many people only make half of the work, but change the data name to ASP, in this case, you can directly download the database using a download tool such as FlashGet.

How to Establish a mobile Internet?

Why do we need to develop web pages into mobile apps? According to Strategy Analytics, in China, Android smartphones accounted for 87.7% of smartphone shipments in the third quarter, higher than 60.5% in the U.S. market. Dr. Liu Yun, vice president

Android connection server Servlet

Enter the user name and password on the logon page. After Successful Logon, the system jumps to the homepage. If the logon fails, an error message is displayed. When passing parameters, use the List of BasicNameValuePair as httpPost. setEntity. You

Five layout modes for Android

Android layout is an important part of application interface development. In Android, there are five layout Methods: LinearLayout (linear layout) and FrameLayout (Framework layout ). Bureau), AbsoluteLayout (absolute layout), RelativeLayout

Build an Android Development Environment on Mac

1. Java runtime: Enter java in the bash terminal. If java is not installed, a prompt "whether to install" is displayed. Click "Install. 2. Eclipse + ADT + SDK: On Mac, it seems that you do not need to download Eclipse, or now Google has specially

Android system architecture

What is Andriod? First, as Dan Morrill, Android open-source and compatibility Technical Director, explained in the compatibility section of the Android development manual, "Android is not a standard or distribution version of the traditional Linux

Android Custom M Dialog box

Now we want to implement a custom Dialog, mainly involving the style File style. Refer to the case and write your own code for implementation. First, create an Android Project -- CustomDialog, and then create an xml file filled_box.xml In the

Manifest errors in Android programming

I recently imported the source code project on the Internet and found some errors on manifest. I would like to share with you here:I. android: installLocation, which we generally cannot use. Here we will explain that it was introduced by android2.2.

Android uses ViewFlipper to achieve sliding between the left and right sides

This effect is achieved after the results are read. 1. Use the following layout on the main interface of the layout file: A Brief Introduction to the layout file: the

Title of the android custom Intent selection Interface

You can use the Intent. createChooser () method to create an Intent and pass in the desired Sting as the title.Take the wallpaper selection box as an example. When you press the button in the blank area of the Launcher workspace, the wallpaper

Android anti-sleep

During Android development, sometimes the system cannot be sleep when the program is running. Otherwise, some operations will stop. Therefore, we need to set disable sleep in two ways: one is to add permissions, and the other is to set in the code.

Android imitation Windows Metro Interface UI

The layout is implemented using LinearLayout (like this layout, we need to consider it globally before the UI, and the operation is relatively simple). Each menu is a Linear block, inside, there is an ImageView and a TextView. Two interfaces are

Android determines whether there is a network N Method

1 ./** * Obtain the network connection method.** @ Param context* @ Return*/Public static NetworkInfo getActiveNetwork (Context context){If (context = null)Return null;ConnectivityManager mConnMgr = (ConnectivityManager) context. GetSystemService

When android calls the system text message Intent, it will pre-fill the receiving number and content

Some time ago, the world called the Intent of the SMS that comes with the system in an application, but the recipient's number never passed. The Code is as follows: The Code is as follows:Uri smsToUri = Uri. parse ("smsto: 123456 ");Intent

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