Flutter简介
Flutter是Google推出的基于Dart语言开发的跨平台开源UI框架,旨在统一纷纷扰扰的跨平台开发框架,在UI层面上多端共用一套Dart代码来实现多平台适配开发。目前应用比较广泛的还是移动端iOS和安卓,虽然传言Fuchsia会是亲儿子项目,那也不是当下考虑的。
下面重点给大家介绍下flutter的环境安装配置问题及解决方法。
(1)安装android SDK时,会出现Android license 的问题,将JAVA JDK降级到SE8就可以了,很多版本没对应上,JAVA8是比较稳定的,包括后面的gradle也需要基于JAVA8
问题描述:[!] Android toolchain - develop for Android devices (Android SDK 27.0.3) ✗ Android license status unknown.
解决:安装JAVA8后,运行 flutter doctor --android-licenses
(2) 卡在Running ‘gradle assembleDebug运行阶段,引用国内阿里云的镜像解决。
问题描述:Running Gradle task 'assembleDebug'...
解决:
修改项目中`android/build.gradle`文件
buildscript { repositories { //修改的地方 //google() //jcenter() maven { url 'https://maven.aliyun.com/repository/google' } maven { url 'https://maven.aliyun.com/repository/jcenter' } maven { url 'http://maven.aliyun.com/nexus/content/groups/public' } } dependencies { classpath 'com.android.tools.build:gradle:3.2.1' } } allprojects { repositories { //修改的地方 //google() //jcenter() maven { url 'https://maven.aliyun.com/repository/google' } maven { url 'https://maven.aliyun.com/repository/jcenter' } maven { url 'http://maven.aliyun.com/nexus/content/groups/public' } } } rootProject.buildDir = '../build' subprojects { project.buildDir = "${rootProject.buildDir}/${project.name}" } subprojects { project.evaluationDependsOn(':app') } task clean(type: Delete) { delete rootProject.buildDir }
修改Flutter的配置文件, 该文件在`Flutter安装目录/packages/flutter_tools/gradle/flutter.gradle`
buildscript { repositories { //修改的地方 //google() //jcenter() maven { url 'https://maven.aliyun.com/repository/google' } maven { url 'https://maven.aliyun.com/repository/jcenter' } maven { url 'http://maven.aliyun.com/nexus/content/groups/public' } } dependencies { classpath 'com.android.tools.build:gradle:3.2.1' } }