Android: Detect when native code should flush unsaved data

Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/utils/ActivityTracker.kt

@@ -49,10 +49,21 @@ class ActivityTracker : ActivityLifecycleCallbacks {
 
     override fun onActivitySaveInstanceState(activity: Activity, bundle: Bundle) {}
 
+    override fun onActivityPostSaveInstanceState(activity: Activity, bundle: Bundle) {
+        if (DirectoryInitialization.areDolphinDirectoriesReady() &&
+            !activity.isChangingConfigurations
+        ) {
+            flushUnsavedData()
+        }
+    }
+
     override fun onActivityDestroyed(activity: Activity) {}
 
     companion object {
         @JvmStatic
         external fun setBackgroundExecutionAllowedNative(allowed: Boolean)
+
+        @JvmStatic
+        external fun flushUnsavedData()
     }
 }

Source/Android/jni/ActivityTracker.cpp

@@ -5,6 +5,8 @@
 
 #include "Common/Logging/Log.h"
 #include "Core/AchievementManager.h"
+#include "UICommon/UICommon.h"
+#include "jni/Host.h"
 
 extern "C" {
 
@@ -18,4 +20,11 @@ Java_org_dolphinemu_dolphinemu_utils_ActivityTracker_setBackgroundExecutionAllow
   INFO_LOG_FMT(CORE, "SetBackgroundExecutionAllowed {}", allowed);
   AchievementManager::GetInstance().SetBackgroundExecutionAllowed(allowed);
 }
+
+JNIEXPORT void JNICALL
+Java_org_dolphinemu_dolphinemu_utils_ActivityTracker_flushUnsavedData(JNIEnv*, jclass)
+{
+  HostThreadLock guard;
+  UICommon::FlushUnsavedData();
+}
 }

Source/Core/UICommon/UICommon.cpp

@@ -158,6 +158,11 @@ void Shutdown()
   Config::Shutdown();
 }
 
+void FlushUnsavedData()
+{
+  INFO_LOG_FMT(CORE, "Flushing unsaved data...");
+}
+
 void InitControllers(const WindowSystemInfo& wsi)
 {
   if (g_controller_interface.IsInit())

Source/Core/UICommon/UICommon.h

@@ -14,6 +14,8 @@ namespace UICommon
 void Init();
 void Shutdown();
 
+void FlushUnsavedData();
+
 void InitControllers(const WindowSystemInfo& wsi);
 void ShutdownControllers();