Cordova Android build error “Cannot read property 'length' of undefined”

Question

I have an older cordova project that I am updating. As a part of this process, I removed the android platform and readded it.

Now when I try to build the project I g

Answer 1

I found another solution by downgrading Android to version 6.1.2, since the suggestions here (and many other suggestions on various forums, like reinstalling plugins, etc.) didn't work for me:

cordova platform update android@6.1.2 --save

If that doesn't work at first hand, try the following:

1. First remove android platform:

   cordova platform remove android
   

2. Add Android version 6.1.2:

   cordova platform add android@6.1.2
   

3. Build Android:

   cordova build android
   

Here are some additional steps I took prior to above (on Mac), just to make sure:

1. Download the latest JDK and install.

2. Add JAVA_HOME this way:

   echo export "JAVA_HOME=\$(/usr/libexec/java_home)" >> ~/.bash_profile
   

3. Restart shell (CMD+Q and open again)

4. Make sure echo $JAVA_HOME equals to Android Studio -> File -> Project Structure -> JDK Location

For me, this is the following path and version:

/Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk/Contents/Home

5. Update Android Studio and all of the SDK packages

6. Update npm

   npm update -g
   

Note: On OS X 10.11 El Capitan or greater, run:

sudo npm update -g --unsafe-perm=true

7. Update Cordova

   npm update -g cordova
   

If all of this didn't work for you and you are left with no other choice, I suggest you try downgrading Cordova to version 6.4.0:

npm update -g cordova@6.4.0