JDK 1.8 在 ionic cordova build android 上的要求检查失败
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【中文标题】JDK 1.8 在 ionic cordova build android 上的要求检查失败【英文标题】：Requirements check failed for JDK 1.8 in ionic on ionic cordova build android 【发布时间】：2019-08-08 00:40:51 【问题描述】：我正在研究 ionic 4，
我正在尝试使用ionic
cordova build android 为 Android 创建构建
但为 Android 创建构建失败，原因如下
-->
检测到 Android Studio 项目 ANDROID_HOME=/用户/用户/库/Android/sdk JAVA_HOME=/库/Java/JavaVirtualMachines/jdk-11.jdk/Contents/Home JDK 1.8 的需求检查失败
java 的详细信息
java 版本
users-MacBook-Pro-3:library user$ java -version java版本“11” 2018-09-25 Java(TM) SE 运行时环境 18.9 (build 11+28) Java HotSpot(TM) 64 位服务器 VM 18.9（构建 11+28，混合模式）
- Details of My Mac os
Macbook pro late 2011
os installed - Ox x ei caption
angular.json 文件
"$schema": "./node_modules/@angular-devkit/core/src/workspace/workspace-schema.json",
"version": 1,
"defaultProject": "app",
"newProjectRoot": "projects",
"projects":
"app":
"root": "",
"sourceRoot": "src",
"projectType": "application",
"prefix": "app",
"schematics": ,
"architect":
"build":
"builder": "@angular-devkit/build-angular:browser",
"options":
"outputPath": "www",
"index": "src/index.html",
"main": "src/main.ts",
"polyfills": "src/polyfills.ts",
"tsConfig": "src/tsconfig.app.json",
"assets": [
"glob": "**/*",
"input": "src/assets",
"output": "assets"
,
"glob": "**/*.svg",
"input": "node_modules/ionicons/dist/ionicons/svg",
"output": "./svg"
],
"styles": [
"input": "src/theme/variables.scss"
,
"input": "src/global.scss"
],
"scripts": [],
"es5BrowserSupport": true
,
"configurations":
"production":
"fileReplacements": [
"replace": "src/environments/environment.ts",
"with": "src/environments/environment.prod.ts"
],
"optimization": true,
"outputHashing": "all",
"sourceMap": false,
"extractCss": true,
"namedChunks": false,
"aot": true,
"extractLicenses": true,
"vendorChunk": false,
"buildOptimizer": true,
"budgets": [
"type": "initial",
"maximumWarning": "2mb",
"maximumError": "5mb"
]
,
"ci":
"progress": false
,
"serve":
"builder": "@angular-devkit/build-angular:dev-server",
"options":
"browserTarget": "app:build"
,
"configurations":
"production":
"browserTarget": "app:build:production"
,
"ci":
"progress": false
,
"extract-i18n":
"builder": "@angular-devkit/build-angular:extract-i18n",
"options":
"browserTarget": "app:build"
,
"test":
"builder": "@angular-devkit/build-angular:karma",
"options":
"main": "src/test.ts",
"polyfills": "src/polyfills.ts",
"tsConfig": "src/tsconfig.spec.json",
"karmaConfig": "src/karma.conf.js",
"styles": [],
"scripts": [],
"assets": [
"glob": "favicon.ico",
"input": "src/",
"output": "/"
,
"glob": "**/*",
"input": "src/assets",
"output": "/assets"
]
,
"configurations":
"ci":
"progress": false,
"watch": false
,
"lint":
"builder": "@angular-devkit/build-angular:tslint",
"options":
"tsConfig": ["src/tsconfig.app.json", "src/tsconfig.spec.json"],
"exclude": ["**/node_modules/**"]
,
"ionic-cordova-build":
"builder": "@ionic/angular-toolkit:cordova-build",
"options":
"browserTarget": "app:build"
,
"configurations":
"production":
"browserTarget": "app:build:production"
,
"ionic-cordova-serve":
"builder": "@ionic/angular-toolkit:cordova-serve",
"options":
"cordovaBuildTarget": "app:ionic-cordova-build",
"devServerTarget": "app:serve"
,
"configurations":
"production":
"cordovaBuildTarget": "app:ionic-cordova-build:production",
"devServerTarget": "app:serve:production"
,
"app-e2e":
"root": "e2e/",
"projectType": "application",
"architect":
"e2e":
"builder": "@angular-devkit/build-angular:protractor",
"options":
"protractorConfig": "e2e/protractor.conf.js",
"devServerTarget": "app:serve"
,
"configurations":
"ci":
"devServerTarget": "app:serve:ci"
,
"lint":
"builder": "@angular-devkit/build-angular:tslint",
"options":
"tsConfig": "e2e/tsconfig.e2e.json",
"exclude": ["**/node_modules/**"]
,
"cli":
"defaultCollection": "@ionic/angular-toolkit"
,
"schematics":
"@ionic/angular-toolkit:component":
"styleext": "scss"
,
"@ionic/angular-toolkit:page":
"styleext": "scss"
【问题讨论】：
【参考方案1】：两者：
java -version
和：
javac -version
应该是 Java 8。可以在 Linux (Debian) 上通过运行以下命令进行更改：
sudo update-alternatives --config java
或：
sudo update-alternatives --config javac
【讨论】：
【参考方案2】：您已安装 Java JDK 版本 11。对于 ionic cordova，您需要 JDK 8。 Read Installing the Requirements.
你可以download JDK 8 here
【讨论】：
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