cordova Android requirements failed: "Could not find an installed version of Gradle"

Solution for linux with apt-get (eg.: Ubuntu, Debian)

I have quite similar problem. I obtained error:

Error: Could not find an installed version of Gradle either in Android Studio,
or on your system to install the gradle wrapper. Please include gradle 
in your path, or install Android Studi

but without Exception. I solved it on Ubuntu by

sudo apt-get install gradle

I found also commands that allows install newest version of gradle in Ubuntu. It works only when first command is executed before (probably some dependecies are incorrect).

sudo add-apt-repository ppa:cwchien/gradle
sudo apt-get update
sudo apt-get install gradle-ppa

https://wtanaka.com/node/8079

If it does not work, try:

export PATH=$PATH:/opt/gradle/gradle-3.5/bin

More info:

https://askubuntu.com/questions/915980/package-is-installed-and-is-not-detected-gradle/915993#915993

For CentOS

Instruction of instalation gradle for CentOS is under this link

https://gist.github.com/parzonka/9371885

Update

Now I installing gradle by sdkman it is something like nvm for node.

Install sdkman

curl -s "https://get.sdkman.io" | bash 

Install gradle

sdk install gradle 4.0.2

If you have android studio installed then you might want to try:

export PATH="$PATH:/home/<username>/android-studio/gradle/<gradle-4.0>/bin" 

This solved my problem.

For Windows:

-Download last version of Gradle (https://gradle.org/releases)

-Create a folder and unzip files (I use C:\Program Files (x86)\gradle)

-Copy the path with the bin directory included (C:\Program Files (x86)\gradle\bin)

-Set the path C:\Program Files (x86)\gradle\bin (in my exemple) to "Path Environment Variables"

Variable name "Path" and variable value "C:\Program Files (x86)\gradle\bin" for both: User Variable table and System Variables table

You may need to reopen the "Prompt commad line"

To test, type gradle in prompt.