User:Joger/Building Qt Multimedia for Android

About this page

On this page I describe how I build Qt Multimedia for Android on Windows.

See also Qt documentation at Qt for Android - Building from Source | Qt 6.7

My build setup

• OS: Windows 11 with dev drive mounted on K: (Using a dev drive makes builds faster when using Windows Defender antivirus)
• Qt source tree: K:\qt\android\qt6
• Build directory main Android build: K:\qt\android\android
• Main (host) build for dev branch: K:\qt\android\host
• Visual Studio 2022 (MSVC)
• Don't have perl in path as it can cause hard to understand build failures
• Have cmake in path

Setting up Android SDK/NDK and JAVA

1. Install Qt Creator with Android option using Qt Maintenance Tool
2. In Creator preferences, install Adoptium JDK (C:\Program Files\Eclipse Adoptium\jdk-17.0.10.7-hotspot)
3. Android SDK location: C:\Utils\Android
4. Select Android NDK 26.1.10909125 and make default
5. Oppenssl location: C:\Utils\Android\android_openssl
6. Verify Android settings:

1. Add Android device for ABI x86_64, OS Version 13.0 ("Tiramisu") (SDK 33)

Install MINGW

Run provisioning script from "K:\qt\android\qt6\coin\provisioning\common\windows\install-mingw.ps1" as administrator. This installs MINGW into C:\MINGW_PATH.

Creating Qt Host Build

Follow steps in https://doc.qt.io/qt-6/android-building.html to create a host build.

Clone Qt source code

K:\qt\Android> git clone git://code.qt.io/qt/qt5.git qt6

Initialize Qt submodules and configure the host build

K:\qt\Android\host> ..\qt6\configure -developer-build -nomake tests -nomake examples -submodules qtmultimedia -init-submodules -codereview-username <gerrit username>

Build the host build

K:\qt\Android\host> cmake --build . --target host_tools --parallel

Building Qt for Android on Windows

Enable the MINGW compiler suite

set MINGW_ROOT=C:\MINGW_PATH\mingw64\bin
set PATH=%MINGW_ROOT%;%PATH%

Configure Qt for cross compile with Android using the host host build from K:\qt\android\host\qtbase.

K:\qt\Android\android> ..\qt6\configure -debug -developer-build -qt-host-path K:\qt\android\host\qtbase -android-abis arm64-v8a -android-sdk C:\utils\android\ -android-ndk C:\utils\android\ndk\26.1.10909125\ -submodules qtmultimedia
 -nomake tests -nomake examples && ninja.exe

Build

K:\qt\Android\android> ninja

Configure QtMultimedia module for cross compiling with Android

When working with QtMultimedia, it is convenient to configure a separate build just for this submodule. This makes configuring and rebuilding faster as long as we only touch code in this submodule.

K:\qt\android\qtmultimedia> ..\android\qtbase\bin\qt-configure-module.bat ..\qt6\qtmultimedia -- -DQT_BUILD_TESTS=ON -DQT_BUILD_EXAMPLES=ON -DQT_BUILD_TESTS_BY_DEFAULT=OFF -DQT_BUILD_EXAMPLES_BY_DEFAULT=OFF

Importing Qt Multimedia build into QtCreator

1. Open QtMultimedia CMakeLists.txt from D:\qt\qt6\qtmultimedia
2. Deselect all kits
3. Import build from D:\qt\build\androidmultimedia
   • This creates a Android Qt 6.8.0 (android) Clang x86_64 kit
   • Configure is run automatically again
4. Select a test to be built (tst_qmediadevices) and choose a corresponding emulator in project build settings for Android kit
5. Build target tst_qmediadevices
6. Observe error message:

19:15:12: The process "C:\Program Files\CMake\bin\cmake.exe" exited normally.

19:15:12: Starting: "D:\qt\build\dev\qtbase\bin\androiddeployqt.exe" --input D:/qt/build/androidmultimedia/tests/auto/unit/multimedia/qmediadevices/android-tst_qmediadevices-deployment-settings.json --output D:/qt/build/androidmultimedia/tests/auto/unit/multimedia/qmediadevices/android-build --android-platform android-33 --jdk "C:/Program Files/Eclipse Adoptium/jdk-17.0.10.7-hotspot" --gradle

Cannot find application binary in build dir D:/qt/build/androidmultimedia/tests/auto/unit/multimedia/qmediadevices/android-build//libs/x86_64/libtst_qmediadevices_x86_64.so.

19:15:12: The process "D:\qt\build\dev\qtbase\bin\androiddeployqt.exe" exited with code 2.

Error while building/deploying project QtMultimedia (kit: Android Qt 6.8.0 (android) Clang x86_64)

When executing step "Build Android APK"

19:15:12: Elapsed time: 01:05.