Optimize migration logic

src/SMAPI/Mobile/FarmMigrationPatch.cs

@@ -0,0 +1,71 @@
+using System.IO;
+using System.Reflection;
+using Android.Support.V4.Provider;
+using HarmonyLib;
+using Java.IO;
+using MonoMod.Utils;
+using StardewModdingAPI;
+using StardewValley;
+
+namespace System.Runtime.CompilerServices;
+
+public class FarmMigrationPatch
+{
+    public static void Apply()
+    {
+        var harmony = new Harmony("FarmMigrationPatch");
+
+        harmony.Patch(
+            original: typeof(StardewValley.MainActivity)
+                .GetMethod("DirectoryCopy", BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Static),
+            prefix: new HarmonyMethod(typeof(FarmMigrationPatch), nameof(DirectoryCopyPrefix))
+        );
+    }
+
+    private static void DirectoryCopy(DocumentFile source, string dest, int depth)
+    {
+        if (!source.Exists()) return;
+
+        if (source.IsDirectory)
+        {
+            if (!Directory.Exists(dest)) Directory.CreateDirectory(dest);
+
+            DocumentFile[] array = source.ListFiles();
+            foreach (DocumentFile documentFile in array)
+            {
+                if (depth == 0)
+                {
+                    if (documentFile.IsDirectory)
+                    {
+                        if (documentFile.Name.Equals("Mods") ||
+                            documentFile.Name.Equals("smapi-internal") ||
+                            documentFile.Name.Equals("ErrorLogs"))
+                            continue;
+                    }
+                    else
+                        continue;
+                }
+
+                string text = Path.Combine(dest, documentFile.Name);
+                if (!System.IO.File.Exists(text)) FarmMigrationPatch.DirectoryCopy(documentFile, text, depth + 1);
+            }
+
+            return;
+        }
+
+        Stream stream = SMainActivity.instance.ContentResolver.OpenInputStream(source.Uri);
+        FileOutputStream fileOutputStream = new FileOutputStream(dest);
+        byte[] array3 = new byte[1024];
+        int num;
+        while ((num = stream.Read(array3)) > 0) fileOutputStream.Write(array3, 0, num);
+
+        stream.Close();
+        fileOutputStream.Close();
+    }
+
+    private static bool DirectoryCopyPrefix(DocumentFile source, string dest)
+    {
+        DirectoryCopy(source, dest, 0);
+        return false;
+    }
+}

src/SMAPI/SMainActivity.cs

@@ -10,6 +10,7 @@ using StardewModdingAPI.Framework;
 using StardewValley;
 using System.Reflection;
 using System.Linq;
+using System.Runtime.CompilerServices;
 using System.Threading.Tasks;
 using Android.Content;
 using Android.Support.V4.Provider;
@@ -45,7 +46,7 @@ namespace StardewModdingAPI
             this.Window.SetFlags(WindowManagerFlags.Fullscreen, WindowManagerFlags.Fullscreen);
             this.Window.SetFlags(WindowManagerFlags.KeepScreenOn, WindowManagerFlags.KeepScreenOn);
 
-            // FarmMigrationPatch.Apply();
+            FarmMigrationPatch.Apply();
 
             SMainActivity.Instance = this;
             try
@@ -178,8 +179,9 @@ namespace StardewModdingAPI
                 Action ContinueGame = () =>
                 {
                     this.Window.ClearFlags(WindowManagerFlags.NotTouchable);
-                    this.IsDoingStorageMigration = false;
+                    SAlertDialogUtil.AlertMessage($"SMAPI migration is finished, please restart game to continue", "Confirm",
-                    this.OnCreatePartTwo();
+                        callback: type => { this.Finish(); });
+
                 };
                 Task.Run(() =>
                 {