Unity Gradle Build Failed: Find the First Android Build Error

Preserve the first failure

Capture the full relevant log before rebuilding repeatedly. The Unity Gradle guide explains how Unity uses Gradle for Android output, and the build manual describes export and build options.

Keep secrets and private paths redacted when sharing logs.

Classify the first meaningful error

Do not replace Unity's bundled Gradle or JDK randomly; the editor version supports a particular toolchain combination.

Review custom templates

Old Gradle templates or third-party post-process scripts can preserve obsolete settings across engine upgrades. Compare them with the supported templates for the installed Unity version.

A fix applied only to an exported generated project may disappear on the next Unity build. Move the correction to the maintained source/template or plugin configuration.

Isolate the responsible plugin

When a dependency or manifest conflict is involved, identify which package introduced each input. Remove or update one component at a time in a controlled branch rather than deleting all caches and SDKs simultaneously.

Rebuild the original target

Verify the same release profile, architecture and signing path that failed. APKLint's Build Analyzer can support review of exported Gradle configuration, while the Unity Analyzer can inspect the output. Neither executes the Unity build pipeline, so retain the successful log and a device test after the correction.