Cordova / Ionic build android Gradle error: Minimu

Question

This is a solution to the above error that I want to document. I found other similar posts, but none described how this error can be associated with Cordova or Ionic.

If you are not careful, there can be a mismatch between the version of Gradle that Android Studio uses and the version of Gradle that Cordova / cordova-android specifies in its auto-generated application code. As you know, running

$ cordova platform add android

(or $ ionic platform add android, if you are building an Ionic app) creates the native application code at the-project/platforms/android.

Inside that folder, the file: /the-project/platforms/android/cordova/lib/builders/GradleBuilder.js exports a variable as shown below:

var distributionUrl = process.env['CORDOVA_ANDROID_GRADLE_DISTRIBUTION_URL'] || 'http\\://services.gradle.org/distributions/gradle-x.y-all.zip';

Where x and y depened on which version of Cordova / cordova-android are being used to build the native application code.

When you run

$ cordova build android

The version of Gradle specified in the distributionUrl var is the version used for the build.

Now here comes the tricky part. When you import the project into Android Studio, you will most likely get a message strongly recommending that you upgrade Gradle to a newer version, as shown below:

If you do this, Android Studio will download a new version of Gradle and store it locally and configure the project to use the newly download local Gradle distribution, which is the radio option below the selected “Use default grade wrapper”, which I ended up deselecting because this will cause errors.

This will cause problems because Android Studio and Cordova will now be attempting to build the application with different versions of Gradle and you will get build errors within Android Studio and also with

$ cordova build android

in the command line. The solution with Cordova apps is to always keep the Android Studio project set to "Use default gradle wrapper" and ignore the tempting messages to upgrade. If you do want to use a newer version of Gradle, you can always change the distributionUrl var in the file mentioned above (however Cordova strongly discourages modifying code within the platforms folder since it is easily overwritten). At the time of writing this, I cannot tell is there is a way to set the Gradle version at the

$ cordova platform add android

step, which is when you would want to do it so you are never directly modifiying code inside of the-project/platforms

Answer 1

you can change the value in platform/android/cordova/lib/builders/GradleBuilder.js

the value you changed, it will be replaced by the lastest gradle zip when you reinstall android platform, so you don't need to worry about change it

var distributionUrl = process.env['CORDOVA_ANDROID_GRADLE_DISTRIBUTION_URL'] || 'https\\://services.gradle.org/distributions/gradle-2.14.1-all.zip';

or like the others ans

export CORDOVA_ANDROID_GRADLE_DISTRIBUTION_URL="https\://services.gradle.org/distributions/gradle-2.14.1-all.zip"

Answer 2

I'd love to just leave this as a comment, but I'm apparently not reputable enough...

After reading your documentation, I wasn't able to resolve my issue with your suggestion of keeping the Android Studio to "Use default gradle wrapper". What I did find is that setting the session variable CORDOVA_ANDROID_GRADLE_DISTRIBUTION_URL before building got me a bit further:

root@dev:$ export CORDOVA_ANDROID_GRADLE_DISTRIBUTION_URL="https\://services.gradle.org/distributions/gradle-2.14.1-all.zip"
root@dev:$ cordova build android

The next thing I had to do was edit <project>/platforms/android/build.gradle and <project>/platforms/android/CordovaLib/build.gradle and make sure they both pointed to a valid gradle plugin version.

dependencies {
    classpath 'com.android.tools.build:gradle:2.2.0'
}

...and in <project>/platforms/android/CordovaLib/build.gradle I added jcenter in the repositories (because maven.org did not seem to have 2.2.0)

repositories {
    mavenCentral();
    jcenter()
}

I was able to build then.