android-gradle

name	android-gradle
description	Automate Gradle tasks for Android projects - build, test, coverage, clean. Use when building APKs, running unit tests, generating coverage reports, or checking dependencies.
license	MIT
version	1.0.0

Android Gradle Skill

Automate Gradle tasks for Android projects: build, test, coverage, clean.

When to Use

• Building debug/release APK
• Running unit tests
• Generating coverage reports
• Cleaning build cache
• Checking dependencies

Commands

Build Commands

Command	Description	Gradle Task
build	Build debug APK	./gradlew assembleDebug
build:release	Build release APK	./gradlew assembleRelease
install	Install to device	./gradlew installDebug
clean	Clean build cache	./gradlew clean
rebuild	Clean + build	./gradlew clean assembleDebug

Test Commands

Command	Description	Gradle Task
test	Run all unit tests	./gradlew testDebugUnitTest
test:class	Run single class	./gradlew test --tests "*.ClassName"
test:method	Run single test	./gradlew test --tests "*.Class.method"

Coverage Commands

Command	Description	Gradle Task
coverage	Full coverage report	./gradlew jacocoTestDebugUnitTestReport
coverage:verify	Enforce 80% minimum	./gradlew jacocoVerification

Dependency Commands

Command	Description	Gradle Task
deps	Show dependency tree	./gradlew dependencies
deps:app	App module only	./gradlew :app:dependencies
outdated	Check outdated deps	./gradlew dependencyUpdates

Usage Examples

# Build and install debug APK
./gradlew assembleDebug && ./gradlew installDebug

# Run specific test class
./gradlew test --tests "*.GameManagerImplTest"

# Generate coverage report
./gradlew jacocoTestDebugUnitTestReport
# Report at: app/build/reports/jacoco/jacocoTestDebugUnitTestReport/html/index.html

# Clean rebuild
./gradlew clean assembleDebug

Timeout Configuration

Task Type	Timeout
assembleDebug	2 min
testDebugUnitTest	3 min
jacocoTestDebugUnitTestReport	2 min
clean	30 sec
dependencies	30 sec

Version Compatibility

Gradle	AGP	Kotlin	JDK
8.10+	8.8+	2.1+	17+
8.5+	8.5+	2.0+	17+
8.0+	8.0+	1.9+	17+

Error Handling

// Handle build failures in scripts
fun handleGradleResult(exitCode: Int, output: String) {
    when {
        exitCode != 0 && output.contains("Compilation failed") ->
            println("Fix compilation errors in: ${extractErrorFiles(output)}")
        exitCode != 0 && output.contains("AAPT") ->
            println("Resource error - check XML files")
        exitCode != 0 && output.contains("OutOfMemoryError") ->
            println("Increase heap: org.gradle.jvmargs=-Xmx4g")
    }
}

Common Errors:

• Build failure: Parse error message, check file:line references
• Test failure: Run with --info for stack traces
• Coverage below threshold: Check app/build/reports/jacoco/*/html/index.html
• OOM: Increase heap in gradle.properties

Test Result Validation

# Run tests and validate results
./gradlew testDebugUnitTest && echo "✓ All tests passed" || echo "✗ Tests failed"

# Check coverage threshold
./gradlew jacocoTestDebugUnitTestReport
# Verify: app/build/reports/jacoco/jacocoTestDebugUnitTestReport/html/index.html
# Target: 80%+ line coverage

# Parse test results programmatically
cat app/build/test-results/testDebugUnitTest/*.xml | grep -E "(tests=|failures=)"

Troubleshooting

Issue	Solution
Build hangs	Kill daemon: ./gradlew --stop
Cache issues	Clean: ./gradlew clean cleanBuildCache
OOM errors	Add to gradle.properties: org.gradle.jvmargs=-Xmx4g
Version conflict	Force resolution in build.gradle.kts
Slow builds	Enable: org.gradle.parallel=true

Command Workflows

# Full CI workflow
./gradlew clean testDebugUnitTest jacocoTestDebugUnitTestReport assembleDebug

# Quick iteration
./gradlew assembleDebug -x lint -x test && ./gradlew installDebug

# Pre-commit check
./gradlew ktlintCheck testDebugUnitTest

CI/CD Integration

# GitHub Actions example
- name: Build & Test
  run: |
    ./gradlew testDebugUnitTest
    ./gradlew jacocoTestDebugUnitTestReport
    ./gradlew assembleDebug

- name: Upload Coverage
  uses: codecov/codecov-action@v4
  with:
    files: app/build/reports/jacoco/*/jacoco*.xml

Best Practices

• Always use Gradle wrapper (./gradlew), never system Gradle
• Use --parallel for multi-module projects
• Enable configuration cache for faster builds
• Skip lint with -x lint if not needed for quick iterations

References

• Gradle User Guide
• Android Gradle Plugin
• JaCoCo Coverage