Solitaire

Classic Klondike solitaire for Android: draw 1 / draw 3, tap or drag, undo, clock, automatic finish and sound. Plain Java, no third-party runtime dependencies, no permissions. UI in English and Spanish.

Item	Value
Package	ar.sanzol.solitaire
Application ID	ar.sanzoltech.solitaire
Toolchain	AGP 9.4.1, Gradle 9.8.0, Java 21
SDK	compile/target 37, min 31

Layout

The Git repository is this project folder. The workspace around it holds what never enters Git:

Solitaire\
  make_release.bat        builds and stages a signed release
  keystore\               create_solitaire_keystore.bat + solitaire-release.jks
  release\<version>\      staged APK + mapping.txt
  docs\                   audit notes
  sources\Solitaire\      this project (Git repository)

In the project, game/ is the pure Java model (unit-tested), ui/ the views.

Build

./gradlew testDebugUnitTest lint
./gradlew assembleDebug

Release

1. Once: keystore\create_solitaire_keystore.bat creates keystore\solitaire-release.jks. Back it up outside the PC; losing it means the app can never be updated.
2. Once: copy keystore.properties.example to keystore.properties and set the passwords.
3. Each release: bump versionCode/versionName, then run make_release.bat from the workspace (or ./gradlew :app:stageRelease). It builds the minified release, signs it (v2 only), verifies the signature and stages release\<version>\solitaire-<version>.apk with its mapping.txt. Keep the mapping.txt private: it is the only way to read a release stack trace.

Without keystore.properties the release still builds, minified but unsigned.