Environment Variables Used by Qt for Android
Qt Android uses some environment variables to enable/disable certain workarounds:
- QT_ANDROID_NO_EXIT_CALL: In some cases, an Android app might not be able to safely clean all threads while calling
exit()and crash. This is because there are C++ threads running and destroying these without joining them terminates an application. These threads cannot be joined because it's not possible to know if they are running. This flag avoids calling
exit()and lets the Android system handle this, at the cost of not attempting to run global destructors.
- QT_ANDROID_ENABLE_WORKAROUND_TO_DISABLE_PREDICTIVE_TEXT: Allows the hiding of predictive text suggestions, mainly from password fields. Certain devices don’t handle this properly.
- QT_ANDROID_ENABLE_RIGHT_MOUSE_FROM_LONG_PRESS: Interprets a long touch press as a right mouse click event.
- QT_ANDROID_DISABLE_ACCESSIBILITY: Disable Accessibility. This prevents the processing of accessibility events.
- QT_ANDROID_FONT_LOCATION: Sets a custom path for system fonts.
- QT_ANDROID_MAX_ASSETS_CACHE_SIZE: cache size for assets under the assets folder.
Note: Though related, these are not the same as CMake commands or variables used by Qt For Android, see Qt for Android: CMake
© 2023 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners. The documentation provided herein is licensed under the terms of the GNU Free Documentation License version 1.3 as published by the Free Software Foundation. Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. All other trademarks are property of their respective owners.