"ERROR: JAVA_HOME is set to an invalid directory" - but I set it to the Android Studio's Gradle JDK as instructed

Capacitor
1

Hi, I’m trying to set up capacitor for the first time and have run into an error when following the documentation. I’m at the stage where I run npx cap run android in my project. On doing so I initially got this error:

[error] The operation couldn’t be completed. Unable to locate a Java Runtime.

I googled this error and found this post with a solution. Since I’m using Android Studio’s emulator, it directed me to “find the SDK path in Android Studio (Android Studio > Preferences… > Build, Execution, Deployment > Build Tools > Gradle > Gradle JDK)”. I did this and set the following as JAVA_HOME:

export JAVA_HOME="/Applications/Android\ Studio.app/Contents/jre/Contents/Home"

This is definitely the right path for Android Studio’s JDK. However now when I run npx cap run android I get:

ERROR: JAVA_HOME is set to an invalid directory: /Applications/Android\ Studio.app/Contents/jre/Contents/Home"

How do I fix this? Thanks!

2

I think if you remove the \ like this:

export JAVA_HOME="/Applications/Android Studio.app/Contents/jre/Contents/Home"

or keep the \, and then remove the double quotes instead:

export JAVA_HOME=/Applications/Android\ Studio.app/Contents/jre/Contents/Home

Both of these 2 methods should solve the issue.

The reason why export JAVA_HOME="/Applications/Android\ Studio.app/Contents/jre/Contents/Home" won’t work is because Enclosing characters in double quotes (") preserves the literal value of all characters within the quotes, with the exception of $, `, \.

This means, when enclosing a string in double quotes ("), white-space characters do not need to be escaped. The only characters that require escaping within double quotes are ", $, `, and \, which should be replaced with \", \$, \`, and \\, respectively.

Bash Reference:

Zsh Reference:

3

That worked, thanks so much!