Harmony-Free Global Device Global Attributes

Hello, dear students! Good morning! Today, we are going to talk about the commonly used "global" attributes in HarmonyOS. During the development process, it is often necessary to obtain information related to the screen size (width and height), orientation (portrait or landscape), application-related information, packaging-related information, etc., which is all about app development.

一、Screen Information Display Detailed Documentation

1、The width and height of the screen

// Screen-related information
let dis = display.getDefaultDisplaySync()
// Screen width 
this.width = px2vp(dis.width)
//  Screen height
this.height = px2vp(dis.height)

2、The height occupied by the liuhai screen and the notch screen from top to bottom

// The height occupied by the top of the screen
let top = this.main.getWindowAvoidArea(window.AvoidAreaType.TYPE_SYSTEM).topRect.height
// The height occupied at the bottom of the screen
let bottom = this.main.getWindowAvoidArea(window.AvoidAreaType.TYPE_NAVIGATION_INDICATOR).bottomRect.height
// px Conversion vp
top = px2vp(top)
bottom = px2vp(bottom)

3、The width and height of the screen content as well as the height of the selection bar in the navigation bar

// Screen width
let contextWidth = width
// Screen height
let contextHeight = height - bottom - top
// Navigation bar height
let navBarHeight = top + 44;
// Height of the selection bar
let tabBarHeight = bottom + 49 + 10;
// Content Height
let contentHeight = height - navBarHeight - tabBarHeight
// Content height plus navigation bar height
let contentNavBar = height - tabBarHeight
// Content height plus navigation bar height
let contentTabBar = height - navBarHeight

二、Application-related information Detailed document

// Application-related Information
let appInfo = bundleManager.getBundleInfoForSelfSync(flags).appInfo
// Application package name
appInfo.name
// Application Name
appInfo.label
// Application Environment
appInfo.appProvisionType
// Packaging environment
appInfo.releaseType
// tokenId
appInfo.accessTokenId

三、Package the relevant information Detailed Document

// Packaging information
bundleInfo = bundleManager.getBundleInfoForSelfSync(flags)
// Version number
bundleInfo.versionName
// Signature information
bundleInfo.signatureInfo
// 安装时间
bundleInfo.installTime
// Author
bundleInfo.vendor

Note: The complete code has been submitted to HarmonyOS Third-Party Library,Use the following command to install.

ohpm install @free/global

Calling method

// Screen-related information, etc....
global.top
global.bottom
global.width
global.height
global.getNavBarHeight()
global.getTabBarHeight()
global.getContentHeight()
global.getContentNavBar()
global.getContentTabBar()
// Apply relevant information, etc....
global.appInfo
global.appName
global.bundleName
global.env
global.releaseType
global.release
global.debug
global.tokenId
// Package the relevant information...
global.bundleInfo
global.bundleInfo.signatureInfo
global.bundleInfo.installTime
global.bundleInfo.vendor
global.bundleInfo.name

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