Examples: use QDialog::showMaximaized() for Android

Examples that use QDialog as main window should be maximized on Android
to avoid a black view on most of the screen.

Task-number: QTBUG-80717
Change-Id: I933c1a01d95d53da009c190c37fa32f27be5af5e
Reviewed-by: BogDan Vatra <bogdan@kdab.com>

examples/network/http/main.cpp

@@ -81,7 +81,11 @@ int main(int argc, char *argv[])
     const QRect availableSize = httpWin.screen()->availableGeometry();
     httpWin.resize(availableSize.width() / 5, availableSize.height() / 5);
     httpWin.move((availableSize.width() - httpWin.width()) / 2, (availableSize.height() - httpWin.height()) / 2);
-
+#ifdef Q_OS_ANDROID
+    httpWin.showMaximized();
+#else
     httpWin.show();
+#endif
+
     return app.exec();
 }

examples/widgets/layouts/basiclayouts/main.cpp

@@ -56,7 +56,11 @@ int main(int argc, char *argv[])
 {
     QApplication app(argc, argv);
     Dialog dialog;
+#ifdef Q_OS_ANDROID
+    dialog.showMaximized();
+#else
     dialog.show();
+#endif
 
     return app.exec();
 }

examples/widgets/layouts/dynamiclayouts/main.cpp

@@ -56,6 +56,11 @@ int main(int argc, char *argv[])
 {
     QApplication app(argc, argv);
     Dialog dialog;
+#ifdef Q_OS_ANDROID
+    dialog.showMaximized();
+#else
     dialog.show();
+#endif
+
     return app.exec();
 }