Identify the project structure
Look at the settings file to see which modules are included. A typical repository has a root build file and app/build.gradle.kts, but names and nesting can differ in Flutter, React Native and composite builds.
The Android build overview describes these layers. Do not assume the first file named build.gradle is the one controlling the APK you are troubleshooting.
Put each setting with its owner
| Setting | Expected context |
|---|---|
| Plugin version shared across modules | Root declaration or version catalog |
| Application plugin application | App module |
namespace, compileSdk, build types |
Android module |
applicationId, version code/name |
Application module configuration |
| Included module paths | Settings file |
| Wrapper distribution | Gradle wrapper properties |
namespace and applicationId are not interchangeable. The application identity documentation explains their different roles in code generation and installed package identity.
Respect the script language
Kotlin DSL files end in .gradle.kts; Groovy DSL files end in .gradle. A snippet valid in one may need different assignment or function syntax in the other. Do not fix a syntax error by changing unrelated plugin versions first.
Trace inherited configuration
Convention plugins, shared scripts and included builds can apply settings indirectly. If a value differs from the visible app block, inspect those sources and the selected variant. Keep one clear source of truth rather than overriding the same value in multiple places.
Verify the resulting artifact
Run the module-qualified build task and inspect the package ID, version and SDK values in the generated APK. APKLint's Build Analyzer can help review the configuration, while its package tools can check the output. Neither a root script nor a module snippet alone proves what a complex build ultimately shipped.
Find the module that owns a failing variant
Suppose a build reports a failure in :mobile:assembleDemoRelease. Begin with ./gradlew projects and inspect the settings configuration for the :mobile project. Its directory can be assigned explicitly, so the project name alone is not proof that the file lives under a directory named mobile. Open the build file associated with that project, then locate the plugin or convention that creates its Android configuration.
Next inspect the demo flavor and release build type together. An application ID suffix, manifest placeholder or resource value may come from either dimension. Reading only the default configuration can miss the value used by the failing artifact. The Android build overview describes the project and module structure; the variant documentation explains how build types and flavors combine.
Record where a setting actually comes from
Make a small ownership record for the value under investigation. For an application ID, include the default value, any flavor override and suffixes. For a plugin version, include the catalog or plugin-management declaration that selects it. For the JDK used by Gradle, include the effective runtime from the wrapper invocation. These are separate configuration channels, even when a single Android Studio dialog displays information about several of them.
If a convention plugin sets a shared value, decide whether the correction belongs there or is specific to mobile. A global SDK change made to fix one module can affect every consumer of the convention. Conversely, a local override can hide an obsolete shared default and leave new modules broken. Keep the chosen ownership clear in the change description.
Finally, invoke the same qualified task and inspect the resulting manifest and package identity. Save the exact task name alongside the commit and variant. A successful default debug build is weaker evidence when the original failure involved a flavored release. If no artifact is produced, resolve the first relevant configuration error before editing signing, shrinking and dependency settings at once; combining unrelated changes makes the effective cause much harder to identify.
Sources and further reading
Reference review: 29 September 2026. Examples illustrate the workflow; check your installed versions, release artifact and account-specific Console requirements before applying them. This guide is not a claim that APKLint executed your project or verified your private account.
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