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Add Android release signing config for Play Store

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Release builds were signed with the debug key, which Play rejects. Load
an upload keystore from android/key.properties (gitignored) and use it
for the release signing config, falling back to the debug key when the
file is absent so `flutter run --release` still works without a keystore.

Add key.properties.example documenting the keytool setup and a
build_android_release.sh helper that builds the signed AAB and refuses
to run when key.properties is missing.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
This commit is contained in:
rzuasti
2026-06-15 14:42:40 -04:00
co-authored by Claude Opus 4.8
parent 468bf7d777
commit 11a964bd37
3 changed files with 67 additions and 3 deletions
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frontend/android/app/build.gradle.kts
+33 -3
View File
@@ -1,3 +1,5 @@
import java.util.Properties
plugins {
id("com.android.application")
id("kotlin-android")
@@ -5,6 +7,15 @@ plugins {
id("dev.flutter.flutter-gradle-plugin")
}
// Load the upload keystore credentials from key.properties (gitignored, never
// committed). Absent on machines without the keystore (e.g. CI or a fresh
// clone), in which case release builds fall back to the debug signing key.
val keystoreProperties = Properties()
val keystorePropertiesFile = rootProject.file("key.properties")
if (keystorePropertiesFile.exists()) {
keystorePropertiesFile.inputStream().use { keystoreProperties.load(it) }
}
android {
namespace = "net.oottsecurity.app"
compileSdk = flutter.compileSdkVersion
@@ -31,11 +42,30 @@ android {
versionName = flutter.versionName
}
signingConfigs {
// Only registered when key.properties is present; otherwise release
// builds fall back to the debug key below.
if (keystorePropertiesFile.exists()) {
create("release") {
keyAlias = keystoreProperties["keyAlias"] as String
keyPassword = keystoreProperties["keyPassword"] as String
storeFile = file(keystoreProperties["storeFile"] as String)
storePassword = keystoreProperties["storePassword"] as String
}
}
}
buildTypes {
release {
// TODO: Add your own signing config for the release build.
// Signing with the debug keys for now, so `flutter run --release` works.
signingConfig = signingConfigs.getByName("debug")
// Sign with the upload key for Play Store builds. When key.properties
// is missing, fall back to the debug key so `flutter run --release`
// still works locally.
signingConfig =
if (keystorePropertiesFile.exists()) {
signingConfigs.getByName("release")
} else {
signingConfigs.getByName("debug")
}
}
}
}