Splash screen (or blank launch screen) is shown when exiting the Android application caused by hiding shown windows and destroying it's surface before application exit. On application exit all windows are first set to invisible then surfaces destroyed and finally removed from layout. Also window opacity change can show underlying splash screen as it is set as theme for the application. When pressing Android device's back button application either should hide current window or exit the application. When exiting current window should be visible during application exit. Add AtomicBoolean m_canBeDestroyed to QtWindow for blocking normal surface removal. Set false by default from QtActivityDelegate.addTopLevelWindow and changed from QAndroidPlatformWindow::setVisible() dependent on if there are more visible windows present. Destroy last window with delay so it can be shown during app exit. In QtActivityDelegate.setUpSplashScreen() set layout to use android device's DayNight theme colors to not show splash screen theme if window opacity is changed. Fixes: QTBUG-127705 Fixes: QTBUG-124140 Pickt-to: 6.8 6.9 6.10 Change-Id: I74adf693dac599c0b46b1f427e563683c1033565 Reviewed-by: Assam Boudjelthia <assam.boudjelthia@qt.io>