[Flutter] Android Gradle plugin requires Java 11 to runのエラーの直し方

色々と記事があったのですが、解決できなかったです。自分なりに触ってみた結果、解決できたので共有します。

エラー文

Launching lib/main.dart on Android SDK built for x86 in debug mode...
Running Gradle task 'assembleDebug'...

FAILURE: Build failed with an exception.

* Where:
Build file '/Users/ryutaroiseki/work/pokemon_card_price_app/android/app/build.gradle' line: 24

* What went wrong:
A problem occurred evaluating project ':app'.
> Failed to apply plugin 'com.android.internal.application'.
   > Android Gradle plugin requires Java 11 to run. You are currently using Java 1.8.
     You can try some of the following options:
       - changing the IDE settings.
       - changing the JAVA_HOME environment variable.
       - changing `org.gradle.java.home` in `gradle.properties`.

* Try:
> Run with --stacktrace option to get the stack trace.
> Run with --info or --debug option to get more log output.
> Run with --scan to get full insights.

* Get more help at https://help.gradle.org

BUILD FAILED in 2s

┌─ Flutter Fix ─────────────────────────────────────────────────────────────────┐
│ [!] You need Java 11 or higher to build your app with this version of Gradle. │
│                                                                               │
│ To get Java 11, update to the latest version of Android Studio on             │
│ https://developer.android.com/studio/install.                                 │
│                                                                               │
│ To check the Java version used by Flutter, run `flutter doctor -v`.           │
└───────────────────────────────────────────────────────────────────────────────┘
Exception: Gradle task assembleDebug failed with exit code 1

解決策

android > build.gradle 内のコードを書き換えました。

# 変更なし

dependencies {
- # classpath 'com.android.tools.build:gradle:7.1.2'
- # classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
+ # classpath 'com.android.tools.build:gradle:4.1.0'
+ # classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:1.6.10"

preference内で設定できるっぽいですが、僕の場合は、設定すらできませんでした。。