How to fix the ''module java.base does not "opens java.io" to unnamed module '' error in Android Studio?

Question

Background

1. I started my first project in android studio to get familiar with Android programming.
2. I am following this tutorial, in which

• I created a new project Empty Activity, without any change
• It is supposed to simulate a simple app that shows "Hello World" message

Problem Description But every time I try to run and build (I want to emulator as of now), I get the following error message.

Unable to make field private final java.lang.String java.io.File.path accessible: Unable to make field private final java.lang.String java.io.File.path accessible: module java.base does not "opens java.io" to unnamed module @42760a00 

Here is my config set-up:

1. Android Gradle plugin version: 4.2.1
2. Gradle Version: 7.0.1 (changed to fix another issue I had while syncing the Gradle ("Gradle sync failed: Unsupported class file major version 60") and based discussion on this forum as quoted below)

Andrey Dernov commented 14 Apr 2021 00:18 Please use Gradle 7.0 or JDK less than 16 version for importgin and building the project (Settings (Preferences on macOS) | Build, Execution, Deployment | Build Tools | Gradle | Gradle JVM option).

3. JDK: 16.0.1

Any suggestion or idea?

Answer 1

The solution from GitHub has worked for me. It was no need to downgrade Java JDK. Just changed gradle version in gradle-wrapper properties to 7.1.1 (6.x does not support java 16), and adding the following line in gradle.properties:

org.gradle.jvmargs=-Xmx1536M --add-exports=java.base/sun.nio.ch=ALL-UNNAMED --add-opens=java.base/java.lang=ALL-UNNAMED --add-opens=java.base/java.lang.reflect=ALL-UNNAMED --add-opens=java.base/java.io=ALL-UNNAMED --add-exports=jdk.unsupported/sun.misc=ALL-UNNAMED