Configuration and Versions

Configuration & Versions

The single source of truth for every dependency / plugin version is gradle/libs.versions.toml for the catalogued ones and app/build.gradle.kts for direct declarations. This page is a flattened reference at the time of v3.8 (stable).

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Toolchain

Tool	Pinned	Where
Gradle	8.13	gradle/wrapper/gradle-wrapper.properties
Android Gradle Plugin	9.0.1	libs.versions.toml → agp
Kotlin	2.3.0 (in catalog)	libs.versions.toml → kotlin
Google Services Gradle plugin	4.4.4	libs.versions.toml → googleGmsGoogleServices
Gradle Play Publisher (GPP)	4.0.0	libs.versions.toml → gpp
JVM target (sourceCompatibility / targetCompatibility / Kotlin jvmTarget)	11	app/build.gradle.kts
JDK required to build	17+ (Microsoft OpenJDK 17 known-good)	AGP 9 requires it

The build uses org.gradle.toolchains.foojay-resolver-convention for automatic JVM selection when needed.

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SDKs

Setting	Value
compileSdk	36 (Android 16)
targetSdk	36
minSdk	35 (Android 15)

minSdk=35 is unusually aggressive — the app deliberately doesn't try to support older devices.

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App version

Setting	Value (as of v3.8)
versionCode	57
versionName	"3.8"

Bumped per Build & Release.

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Dependencies

Declared in app/build.gradle.kts — currently coordinates are hard-coded rather than going through the catalog. Tidiness opportunity: move them to libs.versions.toml (see Known Issues).

AndroidX core / UI

Coordinate	Version
androidx.core:core-ktx	1.12.0
androidx.appcompat:appcompat	1.6.1
androidx.activity:activity-ktx	1.8.2
androidx.constraintlayout:constraintlayout	2.1.4
androidx.lifecycle:lifecycle-runtime-ktx	2.7.0
androidx.swiperefreshlayout:swiperefreshlayout	1.1.0
androidx.core:core-splashscreen	1.0.1

Material

com.google.android.material:material	1.14.0-alpha08

Material is on an alpha track deliberately for Material 3 Expressive components (Extended FAB shrink/extend, collapsing app bar refinements, etc.). Stable releases lag the expressive features.

Firebase

Coordinate	Version
platform("com.google.firebase:firebase-bom")	32.7.2 (BoM — pins everything below)
com.google.firebase:firebase-analytics	(BoM)
com.google.firebase:firebase-auth	(BoM)
com.google.firebase:firebase-firestore	(BoM)

Auth (Credential Manager)

Coordinate	Version
androidx.credentials:credentials	1.2.0
androidx.credentials:credentials-play-services-auth	1.2.0
com.google.android.libraries.identity.googleid:googleid	1.1.0

Other

Coordinate	Version	Purpose
androidx.biometric:biometric	1.2.0-alpha05	App Lock
androidx.work:work-runtime-ktx	2.9.0	Notification worker
junit:junit	4.13.2	Local unit tests
androidx.test.ext:junit	1.1.5	Instrumented tests
androidx.test.espresso:espresso-core	3.5.1	Instrumented tests

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Build configuration

buildTypes.release:

• isMinifyEnabled = true (R8 on)
• isShrinkResources = true
• ProGuard files: proguard-android-optimize.txt + project proguard-rules.pro (preserves Firestore models)
• signingConfig reads from local.properties (populated by ./retrieve_secrets.sh)

buildFeatures.viewBinding = true — enabled, but most adapters/activities still use findViewById directly.

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Gradle properties (gradle.properties)

Property	Value	Effect
org.gradle.jvmargs	-Xmx2048m -Dfile.encoding=UTF-8	2 GB heap, UTF-8 sources
android.useAndroidX	true	Required
kotlin.code.style	official	JetBrains style
android.nonTransitiveRClass	true	Per-module R class — smaller, faster

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Repositories

settings.gradle.kts declares:

• For plugins: google() (filtered to com.android.*, com.google.*, androidx.*), mavenCentral(), gradlePluginPortal().
• For libraries: google(), mavenCentral(). FAIL_ON_PROJECT_REPOS is set — any module that tries to declare its own repo fails the build.

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Updating versions

The safe order:

1. Bump Gradle first (gradle-wrapper.properties).
2. Then AGP (libs.versions.toml). AGP dictates the minimum Gradle.
3. Then Kotlin (libs.versions.toml). Some AGP versions require a matching Kotlin range.
4. Then dependencies. Firebase libs are best bumped together via the BoM.
5. Re-sync in Studio and run ./gradlew :app:assembleDebug to confirm.

Quick "what's out of date" check (with the Ben Manes plugin added):

./gradlew dependencyUpdates

Plugin not in the build today; add id("com.github.ben-manes.versions") version "0.51.0" to the root build.gradle.kts if you want this.

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See also

• Build & Release — actual gradle command set.
• Known Issues — including the version-catalog-bypass for some deps.