Mobile Develop

The location of the DrawText drawing text using canvas in Android is based on the baseline. Such as:The small tail of the letter Q is below the line.How do you find the central position of the letter?Let's take a look at the following example: (the

Additional setup after loading the view, typically from a nib. Get the current date note week1 is Sunday nsdate *date = [NSDate Date]; NSLog (@ "date:%@", date); Get (24 * 60 * 60) that is 24 hours before the date,

Last week's events, the Dragon Boat Festival small long holiday near, or as usual, the last day must be engaged in a "subject", the scene is not big, one day can fix things, if said system learning vim or emacs, that even ... Fortunately, the

Android Memory limit Java Virtual machine has a limit on memory usageADB shell enters the phone, this parameter is recorded in/system/build.prop, if you want to view directly can use ADB shell GetpropMaximum memory limit for a single application,

From this beginning we will look at the new API for threading that we added after Java 5, first look at the API documentation:Java.util.concurrent contains many concurrent building blocks that are thread-safe, well-tested and high-performance, let's

Nagios/zabbix Contrast: (personal view)Nagios core function is the monitoring alarm, is a light weight monitoring system.If need icon display, need to add icon display plugin (I use Pnp4nagios);If a database needs to be stored, the appropriate

Last week's events, the Dragon Boat Festival small long holiday near, or as usual, the last day must be engaged in a "subject", the scene is not big, one day can fix things, if said system learning vim or emacs, that even ... Fortunately, the

One1. Implement kernel driver moduleThe directory structure of the driver Freg is as follows:~/android-2.3_r1/kernel/goldfish----drivers----Freg----Freg.h----FREG.C----Kconfig----MakefileFreg.h and Freg.c refer to the Linux character device driver

This article links http://blog.csdn.net/xiaodongrush/article/details/28613213Reference http://developer.android.com/reference/android/os/SystemClock.html1. The same point and difference of three different timeThe same point: both are relative

The existing Android animation frame is built on the view level, there is an interface startanimation in the view class to start the animation, the Startanimation function will pass a Animation class parameter to the view, this Anima tion is used to

Summary of multithreading usage in iOS1, the basic concept of the process(1) Each process is an application, there is a separate memory space, generally speaking, an application exists a process, but there are multiple processes in the case(2)

Catalogue [-] First step: Apply for "Development certificate" Step two: Add App IDs Step three: Apply for equipment Fourth step: Request a description file First step: Apply for "Development certificate"Enter the Apple

Android, an open source operating system for mobile devices (Smartphone and tablet), led by Google. The Android SDK provides a set of tools and APIs to develop Android applications, using Java. So, if you know Java, Android programming are easy:)In

1 //2 //main.m3 //osxdemo0601_plist4 //5 //Created by Yao_yu on 14-6-3.6 //Copyright (c) 2014 Yao_yu. All rights reserved.7 //8 9 #importTen OneBOOL Isfile (NSString *path) A { -Nsfilemanager *filemanager =[Nsfilemanager Defaultmanager]; -BOOL

? Android Program Debugging ToolThe highlights of the code debugging tools that Google provides us:TraceView and dmtracedump . With these two tools, we debug the program to analyze the bug is very handy. TraceView helps us analyze program

1. Create the Databasehelper class with the Sqliteopenhelper object to create a database of contacts.1) Declare a static final object Databasename= "Csdn.db" as the database csdn, declaring a static integer databaseversion;private static final

Application/////////////////////////////////////1. hardwareaccelerated PropertiesAdd attribute tags to your android manifest file to use for the entire applicationHardware Acceleration。      hardwareAccelerated="true" ...>Specific reference:

In "QT on ANDROID:QT Quick Introduction" We mentioned that QML syntax is similar to JSON, please refer to "qt on android:http Download and JSON parsing" to see the JSON syntax. Of course, we expect to learn QML from scratch, so you can also look

1, Case description: ipad using a variety of styles of modalview,01,02,03,04,05Fig. 01 FIG. 02Fig. 03 FIG. 04Figure 052. CodeViewController.h#import @interface viewcontroller:uiviewcontroller-(ibaction) OnClick: (ID*Segcontrol; @endViewcontroller.m#

In an iOS program, an app defaults to only one uiwindow. UIWindow is a special UIView control and the first UIView object created after the program starts, in order to understand the relationship between UIWindow and Uiviewcontroller, and the