flutter doctor issues even with java 8

Question

I'm using Ubuntu 18.04LTS, Android Studio v3.0.1, installed latest Android SDK API 30 & 29, Android SDK Build tools, Platform tools & Command-line tools(latest),downgraded to java jdk1.8, installed Dart plugin on VSCode, installed Dart and Flutter plugin on Android Studio, installed flutter using snap on terminal.

But when I run flutter doctor , i get this

Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel stable, 1.22.0, on Linux, locale en_IN)
[!] Android toolchain - develop for Android devices (Android SDK version 29.0.1)
    ! Some Android licenses not accepted.  To resolve this, run: flutter doctor --android-licenses
[✓] Android Studio (version 3.0)
[!] Android Studio
    ✗ Flutter plugin not installed; this adds Flutter specific functionality.
    ✗ Dart plugin not installed; this adds Dart specific functionality.
[✓] VS Code (version 1.44.0)
[!] Connected device
    ! No devices available

! Doctor found issues in 3 categories.

It says the plugin not installed even after I installed it and restarted android studio as well.

When i run flutter doctor --android-licenses , i get all licenses and accept them by typing Y in the terminal and even after this when i run flutter doctor it still gives me same result.

There was an issue with Java 9 so downgraded JDK to 1.8 and yet issue isn't resolved.

Answer 1

run the following commands

$ export JAVA_HOME=`/usr/libexec/java_home -v 1.8*`
$ flutter doctor --android-licenses