Mobile Develop

Creating a project directly in Android Studio and importing other projects will have a problem with file encoding, and setting the encoding of the file in Android Studio (version 1.2.0) requires only two steps: 1. Open Setting->editor->file

With the Brew install Nginx installs the latest version of Nginx, but in some cases, the installation of third-party plug-ins requires a specific version, a higher version may not be installed.Its principle is to download the installation package

Preparatory workPermissions Constant public final static int album_request_code = 1; public final static int crop_request = 2; public final static int camera_request_code = 3; Photo Path public static String Saved_image_dir_path =

Choose from two cities as a pre-selected destination. The implementation of two separate threads display 10 city names, each time after each display sleep a random time (within 1000ms), which first displayed, decided to go to which city. Implemented

Android Studio (hereinafter referred to as) acquires SHA1 and MD5 in the following ways (temporarily):1, Open a DOS window in terminal, and then go to the user\administrator\.android of C drive,Then enter the following command to get the SHA1 value

In iOS, there are two frames to access the user's contacts Addressbookui.framework Contact List interface, contact details interface, add contact interface, etc. are provided

In the Android system, the class handler has the following two functions mainly.Sends a message in a newly-started thread.Gets and processes the message in the main thread.Class handler When you do this, you first send a message in a newly-started

Analog file copy:Requirements: To use ProgressDialog and sub-threads to simulate the progress of the copy, after the completion of the main interface prompt copy is completed, respectively, using the normal mode and message mechanism.Layout file:1

Recent project requirements, need to get the number of TextView, by comparing the number of rows with the TextView maxlines to determine whether to show whether the expansion button below the TextView is displayed, less nonsense to say directly on

1. Motion tween (transparent gradient, pan, rotate, zoom, group)Method One: Set through XML file1-1: Create: Res/anim1-2:java Code Write callsAnimation A = Animationutils.loadanimation (this, r.anim.alpha);Img.startanimation (a);1-3: Set Animation1-3

Meta-refers to elements that provide meta-information about the page (meta-information), such as descriptions and keywords for search engines and update frequency. The label is located in the header of the document and does not contain any content.

First, data security　　1. Terminology: Key: A key is a parameter that is entered in an algorithm that converts plaintext into ciphertext or converts cipher text to plaintext. The key is divided into a symmetric key and an asymmetric key

This article explainsThe main interface to customize the bottom menu to use the explanationThe main interface is that day task interface fragmentactivityCustomizing menu functionality requires importing V1uilibrary.Source Address: Https://github.com/

regular expressions, a very old and powerful text processing tool, can quickly implement a very complex business logic by simply using a very short expression statement. Mastering regular expressions skillfully can make your development efficiency

The Rect class is primarily used to represent a rectangular area in a coordinate system and can do some simple things about it. This rectangular area needs to be represented (Left,top,right,bottom) by the lower-left, upper-right two coordinate

The more secure HTTPS security hypertext protocol is followed in iOS, and the following settings are required to access Web pages that follow the HTTP protocol:Add Code NSAppTransportSecurityNSAllowsArbitraryLoadsCopied toThe path;or add the

Juicessh is an Android Terminal client support including ssh,local Shell,mosh and Telnet.Main Features:Full color terminal/SSH client;The pop-up keyboard contains commonly used characters;Use the volume keys to quickly adjust the font size;Support

1. Copy keywords1> shallow copy and deep copyA shallow copy is a copy of the memory address, so that the target object pointer and source object point to the same piece of memory space.Deep copy refers to the specific contents of the Copy object,

This chapter deals with the performance optimization and processing of real-world case studies in Android development. Design to knowledge points have weak references, Memory Monitor,allocation tracker and Leakcanary plugins.1. Test DemoDownload bug

Before we put the mobile phone number to be intercepted and displayed, the next is to use the broadcast receiver to intercept the text message, the broadcast receiver needs and a service binding, when the service is open, the receiver exists, when