安装java 、gradle、flutter、android 系

下载安装完成后，在终端中打开此文件.bash_profile

// 如果没有先执行touch
touch .bash_profile
// 如果有直接执行open
open .bash_profile 

# flutter 配置路径
export PUB_HOSTED_URL=https://pub.flutter-io.cn #//国内用户需要设置
export FLUTTER_STORAGE_BASE_URL=https://storage.flutter-io.cn #//国内用户需要设置
export PATH=/Users/headway/development/flutter/bin:$PATH

#配置android
export ANDROID_HOME="/Users/headway/Library/Android/sdk" #//android sdk目录，替换为你自己的即可
export PATH=${PATH}:${ANDROID_HOME}/tools
export PATH=${PATH}:${ANDROID_HOME}/platform-tools


# 配置java
JAVA_HOME=/Library/Java/JavaVirtualMachines/jdk1.8.0_251.jdk/Contents/Home
PATH=$JAVA_HOME/bin:$PATH:.
CLASSPATH=$JAVA_HOME/lib/tools.jar:$JAVA_HOME/lib/dt.jar:.
export JAVA_HOME
export PATH
export CLASSPATH

#配置gradle
GRADLE_HOME=/Users/headway/gradle/gradle-6.6.1
export GRADLE_HOME
export PATH=$PATH:$GRADLE_HOME/bin

配置完成之后
在终端执行(不执行，关闭重新打开也可)

source .bash_profile

然后执行

java -version
gradle -version
xxxxxxxxx ~ % java -version
java version "1.8.0_251"
Java(TM) SE Runtime Environment (build 1.8.0_251-b08)
Java HotSpot(TM) 64-Bit Server VM (build 25.251-b08, mixed mode)
xxxxxxxxxx~ % gradle -version
------------------------------------------------------------
Gradle 6.6.1
------------------------------------------------------------

Build time:   2020-08-25 16:29:12 UTC
Revision:     f2d1fb54a951d8b11d25748e4711bec8d128d7e3

Kotlin:       1.3.72
Groovy:       2.5.12
Ant:          Apache Ant(TM) version 1.10.8 compiled on May 10 2020
JVM:          1.8.0_251 (Oracle Corporation 25.251-b08)
OS:           Mac OS X 10.16 x86_64

显示版本即安装完成