Android: Light/dark modes detection

After commit: 2248487c6ca9d5459c70a16868d5aeee07d96157 light/dark mode
detection is supported by Windows and macOS. This commit add similar
implementation on the Android side.

Task-number: QTBUG-83185
Pick-to: 6.4 6.3 6.2
Change-Id: Id1ece98e91a31759b58d651ef62b3715ea25d85f
Reviewed-by: Assam Boudjelthia <assam.boudjelthia@qt.io>

5 files changed, 27 insertions, 0 deletions

diff --git a/src/plugins/platforms/android/androidjnimain.cpp b/src/plugins/platforms/android/androidjnimain.cpp
index 92d3d6f62a..876c7c6c32 100644
--- a/src/plugins/platforms/android/androidjnimain.cpp
+++ b/src/plugins/platforms/android/androidjnimain.cpp
@@ -752,6 +752,12 @@ static void handleRefreshRateChanged(JNIEnv */*env*/, jclass /*cls*/, jfloat ref
         m_androidPlatformIntegration->setRefreshRate(refreshRate);
 }
 
+static void handleUiDarkModeChanged(JNIEnv */*env*/, jobject /*thiz*/, jint newUiMode)
+{
+    QAndroidPlatformIntegration::setAppearance(
+        (newUiMode == 1 ) ? QPlatformTheme::Appearance::Dark : QPlatformTheme::Appearance::Light);
+}
+
 static void onActivityResult(JNIEnv */*env*/, jclass /*cls*/,
                              jint requestCode,
                              jint resultCode,
@@ -781,6 +787,7 @@ static JNINativeMethod methods[] = {
     { "setSurface", "(ILjava/lang/Object;II)V", (void *)setSurface },
     { "updateWindow", "()V", (void *)updateWindow },
     { "updateApplicationState", "(I)V", (void *)updateApplicationState },
+    { "handleUiDarkModeChanged", "(I)V", (void *)handleUiDarkModeChanged },
     { "handleOrientationChanged", "(II)V", (void *)handleOrientationChanged },
     { "onActivityResult", "(IILandroid/content/Intent;)V", (void *)onActivityResult },
     { "onNewIntent", "(Landroid/content/Intent;)V", (void *)onNewIntent },
diff --git a/src/plugins/platforms/android/qandroidplatformintegration.cpp b/src/plugins/platforms/android/qandroidplatformintegration.cpp
index 6b9a44e9f1..335d0ba11e 100644
--- a/src/plugins/platforms/android/qandroidplatformintegration.cpp
+++ b/src/plugins/platforms/android/qandroidplatformintegration.cpp
@@ -488,6 +488,15 @@ void QAndroidPlatformIntegration::setScreenSize(int width, int height)
         QMetaObject::invokeMethod(m_primaryScreen, "setSize", Qt::AutoConnection, Q_ARG(QSize, QSize(width, height)));
 }
 
+QPlatformTheme::Appearance QAndroidPlatformIntegration::m_appearance = QPlatformTheme::Appearance::Light;
+
+void QAndroidPlatformIntegration::setAppearance(QPlatformTheme::Appearance newAppearance)
+{
+    if (m_appearance == newAppearance)
+        return;
+    m_appearance = newAppearance;
+}
+
 void QAndroidPlatformIntegration::setScreenSizeParameters(const QSize &physicalSize,
                                                           const QSize &screenSize,
                                                           const QRect &availableGeometry)
diff --git a/src/plugins/platforms/android/qandroidplatformintegration.h b/src/plugins/platforms/android/qandroidplatformintegration.h
index 6e87c9c02b..1b26710d73 100644
--- a/src/plugins/platforms/android/qandroidplatformintegration.h
+++ b/src/plugins/platforms/android/qandroidplatformintegration.h
@@ -13,6 +13,7 @@
 #include <qpa/qplatformnativeinterface.h>
 #include <qpa/qplatformopenglcontext.h>
 #include <qpa/qplatformoffscreensurface.h>
+#include <qpa/qplatformtheme.h>
 
 #include <EGL/egl.h>
 #include <memory>
@@ -103,6 +104,8 @@ public:
 
     void flushPendingUpdates();
 
+    static void setAppearance(QPlatformTheme::Appearance newAppearance);
+    static QPlatformTheme::Appearance appearance() { return m_appearance; }
 #if QT_CONFIG(vulkan)
     QPlatformVulkanInstance *createPlatformVulkanInstance(QVulkanInstance *instance) const override;
 #endif
@@ -115,6 +118,8 @@ private:
 
     QThread *m_mainThread;
 
+    static QPlatformTheme::Appearance m_appearance;
+
     static QRect m_defaultAvailableGeometry;
     static QSize m_defaultPhysicalSize;
     static QSize m_defaultScreenSize;
diff --git a/src/plugins/platforms/android/qandroidplatformtheme.cpp b/src/plugins/platforms/android/qandroidplatformtheme.cpp
index c5b9ba9dee..73cff62e81 100644
--- a/src/plugins/platforms/android/qandroidplatformtheme.cpp
+++ b/src/plugins/platforms/android/qandroidplatformtheme.cpp
@@ -358,6 +358,11 @@ void QAndroidPlatformTheme::showPlatformMenuBar()
     QtAndroidMenu::openOptionsMenu();
 }
 
+QPlatformTheme::Appearance QAndroidPlatformTheme::appearance() const
+{
+    return QAndroidPlatformIntegration::appearance();
+}
+
 static inline int paletteType(QPlatformTheme::Palette type)
 {
     switch (type) {
diff --git a/src/plugins/platforms/android/qandroidplatformtheme.h b/src/plugins/platforms/android/qandroidplatformtheme.h
index ec39ed4794..e495e6d5cc 100644
--- a/src/plugins/platforms/android/qandroidplatformtheme.h
+++ b/src/plugins/platforms/android/qandroidplatformtheme.h
@@ -35,6 +35,7 @@ public:
     QPlatformMenu *createPlatformMenu() const override;
     QPlatformMenuItem *createPlatformMenuItem() const override;
     void showPlatformMenuBar() override;
+    Appearance appearance() const override;
     const QPalette *palette(Palette type = SystemPalette) const override;
     const QFont *font(Font type = SystemFont) const override;
     QVariant themeHint(ThemeHint hint) const override;