Missing bundled JRE in Android Studio for Flutter

UPDATE 2

While the suggestion in Update 1 would work, this is not a "script" interpreted in real-time, and rather part of the flutter binary (if I am not mistaken), so in order for this to work, one would have to compile the flutter binary again, I don’t know how to do that right now (as I’ve never used flutter beyond the basics) and I can’t certainly do it on my "work machine" where the Corporate eyes forbid everything that is fun.

In other words, use the symlink trick you found in this GitHub issue until the Flutter team releases an updated flutter that searches for the correct java Path in the newer versions of Android Studio.

And Jetbrains, please, stop renaming the java location every other year…

UPDATE 1

In the flutter sdk, there’s a file called: android_studio.dart. (well there are various android related files, none "java" related, since it seems like Flutter treats Java as an "android thing" (judging by the fact that all java references and validations or checks are performed in android_ files).

This file is located in path/to/flutter/packages/flutter_tools/lib/src/android/android_studio.dart.

Inside it contains this to calculate the path to java:

    final String javaPath = globals.platform.isMacOS ?
        version != null && version.major < 2020 ?
        globals.fs.path.join(directory, 'jre', 'jdk', 'Contents', 'Home') :
        globals.fs.path.join(directory, 'jre', 'Contents', 'Home') :
        globals.fs.path.join(directory, 'jre');

In essence, if you add another entry like this:

        globals.fs.path.join(directory, 'jbr', 'Contents', 'Home') :

So it ends up looking like:

    final String javaPath = globals.platform.isMacOS ?
        version != null && version.major < 2020 ?
        globals.fs.path.join(directory, 'jre', 'jdk', 'Contents', 'Home') :
        globals.fs.path.join(directory, 'jre', 'Contents', 'Home') :
        globals.fs.path.join(directory, 'jbr', 'Contents', 'Home') :
        globals.fs.path.join(directory, 'jre');

Then you can run flutter doctor and it may work.

I also removed the && version.major < 2020 part, just to ensure it was always run. Now I see:

[!] Android Studio (version 2022.1)
    ✗ Unable to find bundled Java version.
[✓] Android Studio (version 2021.3)

So… Two different Android Studio versions, the latest (the one with jbr instead of jre seems to work fine.

In Android Studio Electric Eel, the bundled Java was moved to /Applications/Android Studio.app/Contents/jbr/Contents/Home so you can set your $JAVA_HOME to point to that directly.

In Addition, if you’re on macOS (as it looks like that’s the case) remember macOS uses (for some Apple reason) a binary called java_home to set the JAVA installations.

You can find this binary in /usr/libexec/java_home.

It seems like the flutter plug-in may be looking for Java under the assumption that it’s under the "old" jre instead of the "new" jbr folder. I don’t know if this is hardcoded (and therefore needs a ‘patch’) or if it just reads the environment variable for JAVA_HOME.