Answer by Hamfri for cordova Android requirements failed: "Could not find an installed version of Gradle"

Solution for linux and specifically Ubuntu 20:04. First ensure you have Java installed before proceeding:

1. java -version2. sudo apt-get update3. sudo apt-get install openjdk-8-jdk

Open .bashrc

vim $HOME/.bashrc 

Set Java environment variables.

export JAVA_HOME="/usr/lib/jvm/java-1.8.0-openjdk-amd64"export JRE_HOME="/usr/lib/jvm/java-1.8.0-openjdk-amd64/jre"

Visit Gradle's website and identify the version you would like to install. Replace version 6.5.1 with the version number you would like to install.

 1. sudo apt-get update 2. cd /tmp && curl -L -O https://services.gradle.org/distributions/gradle-6.5.1-bin.zip 3. sudo mkdir /opt/gradle 4. sudo unzip -d /opt/gradle /tmp/gradle-6.5.1-bin.zip

To setup Gradle's environment variables use nano or vim or gedit editors to create a new file:

sudo vim /etc/profile.d/gradle.sh

Add the following lines to gradle.sh

export GRADLE_HOME="/opt/gradle/gradle-6.5.1/"export PATH=${GRADLE_HOME}/bin:${PATH}

Run the following commands to make gradle.sh executable and to update your bash terminal with the environment variables you set as well as check the installed version.

1. sudo chmod +x /etc/profile.d/gradle.sh3. source /etc/profile.d/gradle.sh4. gradle -v