Common Android issues

How to overcome common issues building Android mobile apps on Codemagic

Builds work locally but fail on Codemagic

Description

Builds succeeds locally but fails on Codemagic, throwing vague errors (e.g. Gradle task bundleRelease failed with exit code 1), or the build is successful, but some functions aren’t working.

Cause

These issues are likely caused by plugin and/or gradle versions used locally being different from the versions used on Codemagic. If you are using a gradle version that is different from Codemagic, you have to define it in gradle wrapper. Otherwise, Codemagic ignores your build.gradle file, and your build won’t work properly. See which software versions Codemagic uses on MacOS, on Linux and on Windows instances.

Solution

First, you need to make sure that the gradlew file isn’t in .gitignore. Look for **/android/gradlew, and if it’s in .gitignore, delete it from there. Then add !gradle-wrapper.jar to a new line in .gitignore to create an exception so that gradle-wrapper.jar would also be excluded from .gitignore.

Run ./gradlew wrapper --gradle-version [your gradle version] locally to create gradlew and gradle-wrapper.properties files in your repository. Commit the changes and rerun your Codemagic build.

Additional steps

Additional steps are required if you see the following error during the build process:

Error! Failed to check gradle version. Malformed executable tmpABCDEF/gradlew

Codemagic runs ./gradlew --version on the builder side to check if it is suitable for execution. If you see the error message shown above, there is something wrong with checking the gradle version.

To investigate and fix the issues:

1. Make a clean clone of the repository and execute the following commands:

  cd <project_root>
  chmod +x gradlew
  ./gradlew --version

2. Make a fix for the issue found.
3. Commit changes to the repo.
4. Run the build again in Codemagic.

Cannot resolve Gradle plugin

Description

Android users experiencing issues resolving plugins because of the sunset of JCenter.

Cause

On February 3. 2021, JFrog, the company that maintains JCenter, announced that they will be shutting down Bintray and JCenter.

Solution

To avoid disruptions to your build pipelines, start migrating to a new hosting solution like mavenCentral(), rather than using JCenter or Bintray.

To fully migrate away from JCenter, replace all jcenter() occurrences with mavenCentral() in all build.gradle files.

  repositories {
    mavenCentral()
      google()

      //other repos
    }

• Disable or delete cache.
• Run your build pipeline to see if everything works still.
  • If your build is successful, you’re done.
  • If your build still fails, you’ll need to troubleshoot which dependencies still require JCenter. The errors in the failed build step will point out the dependecies using JCenter.

Java heap space out of memory error for M1 builds

Description

Builds succeed on Mac Pro machines but fail on M1 machines with the below error:

ERROR:: R8: java.lang.OutOfMemoryError: Java heap space
FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ':app:minifyReleaseWithR8'.
> com.android.tools.r8.CompilationFailedException: Compilation failed to complete

Solution

Upgrading to the latest version of Gradle in the gradle-wrapper.properties file and the Android Gradle plugin in the android/build.gradle file to the latest version fixes the issue.

You can refer to the Official Documentation from Android Developer guides to learn more about the latest compatible version here.