Mobile Develop

document.documentelement      returns the root node of the document document.body        document.activeelement  returns the tag node (IE)   that is being clicked in the current document; event.fromelement         return the mouse out of the

Some of the following optimization scenarios are summarized1. Pre-layout2. Load cache by page3. Background thread processing picture (do not block the main thread)4. Reduce the view level, reduce frequent addsubview,removesubview with hidden instead5

NO1:Adding dependent librariesProject's Build.gradle file addbuildscript{... dependencies{... Classpath ' com.neenbedankt.gradle.plugins:android-apt:1.8 '} }Add the Build.gradle file in Module:appApply plugin: ' com.neenbedankt.android-apt '

First, start by creating a C # console appSecond, then add the necessary namespacesUsing System;Using System.Collections.Generic;Using MySql.Data.MySqlClient;Using System.Data;Using Dapper;Using System.Linq;Third, first configure the class table

cp:http://blog.csdn.net/x_perseverance/article/details/78897637When each function is called, it creates a space for the function, which is called the stack frame . First, let's look at different kinds of registers :(1) Eax,ebx,ecx,edx: Universal

1. Please write out the calling system dial-up interface? Intent intent=new Intent (intent.action_dial,uri.pase ("tel:12345678910")); StartActivity (Intent); Add Permission: 2. How many ways are there to listen for incoming

What happens when do you type a URL in the browser and press ENTER?1. You type maps.google.com into the address bar of your browser.2. The browser checks the cache for a DNS record to find the corresponding IP address of maps.google.com.3. If the

Gets the current screen display of the Viewcontroller -(Uiviewcontroller *) GETCURRENTVC { Uiviewcontroller *result = nil; UIWindow * window = [[UIApplication sharedapplication] Keywindow]; if (window.windowlevel! =

Create Config.gradleExt { android = [ compilesdkversion : buildtoolsversion : "26.0.2", minsdkversion : Targetsdkversion, versioncode: 1, versionname : "1.0",

Ascending sequence (Greedy + clever) programming questions, sequential greedyQuestion Calculate the monotonic ascending subsequence of the specified length, and output the smallest lexicographic sequence.Think about the longest ascending subsequence:

VS. NET (C #) upgrade-2.12 _ database interface: NET Framework data provider category, vs.net . NET data provider category, such System. Data ?? The namespace provides different ADO. NET classes. System. Data. Common? Base classes and interfaces

VS. NET database interface: connection string, vs.net string The ADO. NET Class Library provides consistent access to different external data sources. These data sources can be local data files (such as excel, txt, access, SQLite), or remote

May_umount of Kernel File System API, kernel apimay_umount May_umount of Kernel File System APIs Int may_umount (struct vfsmount * mnt) is used to determine whether the mount point of the file system is busy. The source code analysis is as follows:

Call process details analysis, call process details Because the dial-up process is synchronized from the application layer to the framework layer, you can call it through analysis. DialpadFragmentFocus on intent build and pass dial number

Introduction to udp transmission protocol, udp transmission protocol What is UDP? UDP is short for User datav Protocol. The Chinese name is the User Datagram Protocol. It is a connectionless transport layer Protocol in the OSI (Open System

Git version management tutorial, git management tutorial Git version management tutorial For a long time, run the command directly ~Create a local repository git init Obtain a remote Repository git clone [url] Create a remote Repository // Add a

Layout_weight usage and attention Sometimes, you will always forget some things. Now, write down the blog record when you are free. I still remember the first time I used layout_weight, I thought the layout_weight attribute was used to separate

RecylerView implements long-pressing, dragging, and changing the position of the item, recylerviewitem : Steps: 1. Create a new class inheritance? ItemTouchHelper. Callback: Class ItemDrag extends ItemTouchHelper. callback {// set the movable

Use details of DataBinding, details of databinding Preface: The first contact with DataBinding was when I first started the company. The original project of the company was the DataBinding. At that time, I checked some materials to get started with

Basic programming and development knowledge I. Rxjava (responsive programming library with functions: asynchronous, concise, and observer Mode)Conclusion: Rx is a programming interface that uses the observed data stream for asynchronous