Android Studio - Could not find tools.jar. Please check that X contains a valid JDK installation

user_2270776 0
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I am at my wits end trying to get this to work, and I'm not finding a solution. I just upgraded my Android Studio to Arctic Fox and I'm getting this error:

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':firebase_core:compileDebugJavaWithJavac'.
> Could not find tools.jar. Please check that /Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home contains a valid JDK installation.

I am running on macOS BiGSur 11.2.3.

I opened terminal and ran /usr/libexec/java_home -V | grep jdk

Which outputs:

Matching Java Virtual Machines (1):
   1.8.301.09 (x86_64) "Oracle Corporation" - "Java" /Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home

I tried editing ~/.zshrc by adding various export lines such as:

export JAVA_HOME=/Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home
export PATH=$JAVA_HOME/bin:$PATH

to which I get this error in the terminal after running source ~/.zscrc:

.zshrc:export:2: not valid in this context: Plug-Ins/JavaAppletPlugin.plugin/Contents/Home

and tried this:

export JAVA_HOME=$(/usr/libexec/java_home)

which just repeats the same Build failure.

I also tried adding various paths to the Gradle.properties file, such as one of the following:

org.gradle.java.home=/Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home
org.gradle.java.home=/Library/Java/JavaVirtualMachines/jdk1.8.0_271.jdk/Contents/Home

Same Build failure for the first one, and Value '/Library/Java/JavaVirtualMachines/jdk1.8.0_271.jdk/Contents/Home' given for org.gradle.java.home Gradle property is invalid (Java home supplied is invalid) for the second one.

I did a search for tools.jar on my system, and nothing is found.

Also tried uninstalling Java and reinstalling it... nothing.

Please any other suggestions?

gradle macos build android java
1 Answers

Finally found an answer. Apparently I only had the JRE installed, and not the JDK. Steps to fix:

  1. Install Java SE Development Kit 8

  2. Re-run /usr/libexec/java_home -V | grep jdk to get the new path, which outputs:

Matching Java Virtual Machines (2):
    1.8.301.09 (x86_64) "Oracle Corporation" - "Java" /Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home
    1.8.0_301 (x86_64) "Oracle Corporation" - "Java SE 8" /Library/Java/JavaVirtualMachines/jdk1.8.0_301.jdk/Contents/Home

  1. Add the Java SE 8 path to android > gradle.properties: org.gradle.java.home=/Library/Java/JavaVirtualMachines/jdk1.8.0_301.jdk/Contents/Home

  2. Rebuild the app.

Hope this helps someone else after I spent 5 hours trying to figure this out.

user_22707760
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