// Copyright (C) 2025 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GFDL-1.3-no-invariants-only

/*!
\page android-publishing-to-googleplay.html
\title Publishing to Google Play
\brief A guide to configure, build, and publish your app with Google Play Console.
\ingroup android-platform-extra-topics
\previouspage android-3rdparty-libs.html
\nextpage Supporting Google Emoji Font Policy

\l{\Q4A} provides everything you need to develop, build, and package
Android apps. This guide shows you how to configure, build, and publish your app
to Google Play Console.

\section1 Configuring your app

Configure your Android app settings using CMake APIs or by editing the manifest
directly. Android apps require various settings in \c{AndroidManifest.xml} and
Gradle build files. Qt 6 provides convenient CMake APIs to manage these from
your project.

\section2 Set essential app properties

Define your app's package name, version, and Android SDK requirements:

\badcode
set_target_properties(${appname} PROPERTIES
    QT_ANDROID_PACKAGE_SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/android"
    QT_ANDROID_PACKAGE_NAME "io.qt.calqlatr"
    QT_ANDROID_APP_NAME "Calqlatr"
    QT_ANDROID_TARGET_SDK_VERSION 35
    QT_ANDROID_MIN_SDK_VERSION 28
    QT_ANDROID_VERSION_NAME "1.0"
    QT_ANDROID_VERSION_CODE 10
)
\endcode

\note Check the \l{Android: Target API level requirements}{current Google Play target SDK version requirement} and set \c{QT_ANDROID_TARGET_SDK_VERSION} accordingly. You can target higher versions than the minimum requirement.

\section2 Configure app icons

Set your app icon and create the icon files in the correct directories:

\badcode
set_target_properties(${appname} PROPERTIES
    QT_ANDROID_APP_ICON "@drawable/ic_launcher"
)
\endcode

Place your icon files in:

\badcode
<QT_ANDROID_PACKAGE_SOURCE_DIR>/res/drawable-<dpi>
\endcode

You can create icon files using:
\list
\li \QC Android Icon Generator
\li \l{Android Studio: Image Asset Studio}
\li Online Android icon generators
\endlist

\section2 Optimize plugin packaging

Reduce your app size by specifying which plugins to include. The
\l{The androiddeployqt Tool}{androiddeployqt} tool may include plugins your app
doesn't need at runtime:

\badcode
qt_import_plugins(${appname}
    INCLUDE_BY_TYPE imageformats Qt::QSvgPlugin Qt::QJpegPlugin
    EXCLUDE_BY_TYPE iconengines networkinformation tls platforminputcontexts qmltooling
)
\endcode

\note The \l{qt_import_plugins} command only includes plugins from your
target's linked dependencies.

\section3 Related documentation
\list
\li \l{\Q4A Manifest File Configuration}
\li \l{The androiddeployqt Tool}
\endlist

\section1 Building your app

Build your app for release and prepare it for Google Play Console submission.

\section2 Configure release build

Google Play requires release builds. Debug information can be included as separate files and is encouraged for better crash reporting:

\if defined(onlinedocs)
  \tab {release-build}{tab-qtcreator}{via \QC}{checked}
  \tab {release-build}{tab-cmake}{via CMake}{}
  \tabcontent {tab-qtcreator}
\else
  \section3 via \QC
\endif
\list 1
\li Open your project in \QC
\li Select \uicontrol{Projects} from the sidebar
\li Choose \uicontrol{Release} build configuration
\endlist
\if defined(onlinedocs)
  \endtabcontent
  \tabcontent {tab-cmake}
\else
  \section3 via CMake
\endif
\badcode
qt-cmake -DCMAKE_BUILD_TYPE=Release
\endcode
\if defined(onlinedocs)
  \endtabcontent
\endif

Ensure debuggable is set to \c{false} in your manifest or Gradle configuration.

\section2 Enable multi-ABI support

Build your app for multiple device architectures to maximize compatibility:

\if defined(onlinedocs)
  \tab {multi-abi}{tab-qtcreator2}{via \QC}{checked}
  \tab {multi-abi}{tab-cmake2}{via CMake}{}
  \tabcontent {tab-qtcreator2}
\else
  \section3 via \QC
\endif
\list 1
\li Go to \uicontrol{Projects} > \uicontrol{Build}
\li In the CMake configuration settings, set \c{QT_ANDROID_BUILD_ALL_ABIS} to \c{ON}
\endlist
\if defined(onlinedocs)
  \endtabcontent
  \tabcontent {tab-cmake2}
\else
  \section3 via CMake
\endif
\badcode
qt-cmake -DQT_ANDROID_BUILD_ALL_ABIS:BOOL=ON ...
\endcode
\if defined(onlinedocs)
  \endtabcontent
\endif

\section2 Create signing keys

Google Play Console requires signed app releases. Google recommends using
Google Play managed signing with two keys:

\list
\li \b{Signing key}: Generated and managed by Google when you create your app
    in Google Play Console
\li \b{Upload key}: Managed locally to sign app bundles for upload
\endlist

\if defined(onlinedocs)
  \tab {signing-keys}{tab-qtcreator3}{via \QC}{checked}
  \tab {signing-keys}{tab-cmdline}{via Command Line}{}
  \tabcontent {tab-qtcreator3}
\else
  \section3 via \QC
\endif
\list 1
\li Open \uicontrol{Projects} > \uicontrol{Build}
\li Select \uicontrol{Build Android APK}
\li Click \uicontrol{Create} under \uicontrol{Application Signature}
\li Fill in the keystore details
\li Enable \uicontrol{Sign package}
\endlist

See \l{\QC: Signing Android Packages}{Signing Android Packages} for detailed
instructions.
\if defined(onlinedocs)
  \endtabcontent
  \tabcontent {tab-cmdline}
\else
  \section3 via Command Line
\endif
Generate a keystore:
\badcode
keytool -genkey -keyalg RSA -keystore upload-key.keystore \
    -alias play_apps \
    -storepass <password> -keypass <key-password> \
    -dname "CN=<n>, OU=<unit>, O=<organisation>, L=<city>, ST=<state>, C=<country>"
\endcode

Enable signing:
\badcode
qt-cmake -DQT_ANDROID_SIGN_APK:BOOL=ON -DQT_ANDROID_SIGN_AAB:BOOL=ON ...
\endcode

Set the environment variables:
\badcode
export QT_ANDROID_KEYSTORE_PATH=upload-key.keystore
export QT_ANDROID_KEYSTORE_ALIAS=play_apps
export QT_ANDROID_KEYSTORE_STORE_PASS=<password>
export QT_ANDROID_KEYSTORE_KEY_PASS=<key-password>
\endcode
\if defined(onlinedocs)
  \endtabcontent
\endif

\section2 Generate app bundles (AAB)

Google Play Console now primarily accepts Android App Bundles (AAB) instead of
APKs. AAB packages allow Google Play to optimize app delivery for each device.

\if defined(onlinedocs)
  \tab {generate-aab}{tab-qtcreator4}{via \QC}{checked}
  \tab {generate-aab}{tab-cmake4}{via CMake}{}
  \tabcontent {tab-qtcreator4}
\else
  \section3 via \QC
\endif
\list 1
\li Go to \uicontrol{Projects} > \uicontrol{Build}
\li Select \uicontrol{Build Android APK}
\li Under \uicontrol{Advanced Actions}, enable \uicontrol{Build Android App Bundle}
\li Optionally enable \uicontrol{Open package location after build}
\li Build your project
\endlist
\if defined(onlinedocs)
  \endtabcontent
  \tabcontent {tab-cmake4}
\else
  \section3 via CMake
\endif
Generate an AAB:
\badcode
cd build
cmake --build . --target aab
\endcode

For a specific target:
\badcode
cmake --build . --target appname_make_aab
\endcode

Your AAB file is saved to:
\c{/<build-path>/android-build-appname/build/outputs/bundle/release/}
\if defined(onlinedocs)
  \endtabcontent
\endif

\section3 Related documentation
\list
\li \l{Android: Use Play App Signing}{Google's Play App Signing guide}
\li \l{Android: Android App Bundle FAQ}{Android App Bundle FAQ}
\endlist

\section1 Publishing to Google Play Console

After building and signing your app, publish it to Google Play Console for
distribution.

\section2 Prepare for upload

Before uploading:
\list 1
\li Test your app thoroughly on different devices and Android versions
\li Prepare promotional materials (screenshots, descriptions, feature graphics)
\li Review Google Play's content policies and guidelines
\endlist

\section2 Create your app in Google Play Console

\list 1
\li Sign in to \l{Google Play Console}
\li Create a new app or select an existing one
\li Complete the app details and content rating questionnaire
\li Set up pricing and distribution settings
\endlist

To create an account if you don't have one, see Google's
\l{Android: How to get started with Play Console}{Play Console setup guide}.

\section2 Upload your app bundle

\list 1
\li Navigate to \uicontrol{Release} > \uicontrol{Production}
\li Create a new release
\li Upload your signed AAB file
\li Add release notes
\li Review and roll out the release
\endlist

\section3 Resources
\list
\li \l{Android: Create and set up your app in Play Console}{Create and set up your app}
\li \l{Android: Publish your app in Play Console}{Google's app publishing guide}
\li \l{Android: Google Play Console webinars}{Google Play Console webinars}
\endlist

\section1 Special considerations

\section2 Single-ABI builds for legacy projects

For Qt versions that don't support multi-ABI builds (such as qmake projects),
build each architecture separately with different version codes:

\badcode
ANDROID_VERSION_CODE = <unique_version>
\endcode

Consider using a versioning scheme like \c{<Platform><ABI><AppVersion>}:
\list
\li Platform: 1 for Arm, 2 for Intel
\li Architecture: 32 for 32-bit, 64 for 64-bit
\endlist

Example: Release 1.0 for arm64-v8a uses version code \c{16410}.

See Google's \l{Android: App Versioning}{app versioning} documentation for
details.

\sa {Deploying an Application on Android}
*/
