Failure: build failed with an exception a problem occured configuring root project 'android'

Question

I'm building a hybrid app using ionic framework. I did installed npm,cordova, ionic and android sdk. also I have set the environment variables. I was able to run following commands

1. ionic start todo blank
2. cd todo
3. ionic platform add android

but when I run ionic build android The build fails.

BUILD FAILED

Total time: 29.551 secs FAILURE: Build failed with an exception.

• What went wrong: A problem occurred configuring root project 'android'.

  java.lang.NullPointerException (no error message)

• Try: Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Error: cmd: Command failed with exit code 1 Error output: FAILURE: Build failed with an exception.

• What went wrong: A problem occurred configuring root project 'android'.

  java.lang.NullPointerException (no error message)

• Try: Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.

Answer 1

Just remove the node_modules folder from your project using:

rm -rf node_modules

and then install all dependencies again:

npm i

Answer 2

This worked for me.Just needed to set the environment variable(ANDROID_HOME & PATH) in the CLI

Answer 3

I have faced the same issue and Solved... What you need to do is

• first Solution

  • ionic platform rm android ,

  • ionic platform add android ,

If that does not work then

• Second

  • Remove your all plugins and add again ,

Solved my problem