离子无法建立android

我是Ionic的入门者。当我构建第一个离子应用程序时，遇到错误。

 Error:Failed to run "java -version", make sure that you have a JDK installed.

 Error:D:\andorid\ionic\test\platforms\android\cordova\build.bat: command failed with exit code 2

      at ChildProcess.whenDone 
      at ChildProcess. emit 
      at maybeClose 
      at Process.ChildProcess._handle.onexit 

实际上，我的Java环境已正确安装。我可以运行“ java -version”。

Java version "1.8.0_20"
Java SE Runtime Environment 
Java HotSpot 64-Bit Server VM 

怎么解决呢？

以此打开.bash_profile文件

nano ~/.bash_profile

添加后

export JAVA_HOME=$(/usr/libexec/java_home)
export PATH=${JAVA_HOME}/bin:$PATH
export PATH=/usr/local/bin:$PATH