android: Convert AddDirectoryHelper to Kotlin

src/android/app/src/main/java/org/yuzu/yuzu_emu/utils/AddDirectoryHelper.java

@@ -1,38 +0,0 @@
-package org.yuzu.yuzu_emu.utils;
-
-import android.content.AsyncQueryHandler;
-import android.content.ContentValues;
-import android.content.Context;
-import android.net.Uri;
-
-import org.yuzu.yuzu_emu.model.GameDatabase;
-import org.yuzu.yuzu_emu.model.GameProvider;
-
-public class AddDirectoryHelper {
-    private Context mContext;
-
-    public AddDirectoryHelper(Context context) {
-        this.mContext = context;
-    }
-
-    public void addDirectory(String dir, AddDirectoryListener addDirectoryListener) {
-        AsyncQueryHandler handler = new AsyncQueryHandler(mContext.getContentResolver()) {
-            @Override
-            protected void onInsertComplete(int token, Object cookie, Uri uri) {
-                addDirectoryListener.onDirectoryAdded();
-            }
-        };
-
-        ContentValues file = new ContentValues();
-        file.put(GameDatabase.KEY_FOLDER_PATH, dir);
-
-        handler.startInsert(0,                // We don't need to identify this call to the handler
-                null,                        // We don't need to pass additional data to the handler
-                GameProvider.URI_FOLDER,    // Tell the GameProvider we are adding a folder
-                file);
-    }
-
-    public interface AddDirectoryListener {
-        void onDirectoryAdded();
-    }
-}

src/android/app/src/main/java/org/yuzu/yuzu_emu/utils/AddDirectoryHelper.kt

@@ -0,0 +1,27 @@
+package org.yuzu.yuzu_emu.utils
+
+import android.content.AsyncQueryHandler
+import android.content.ContentValues
+import android.content.Context
+import android.net.Uri
+import org.yuzu.yuzu_emu.model.GameDatabase
+import org.yuzu.yuzu_emu.model.GameProvider
+
+class AddDirectoryHelper(private val context: Context) {
+    fun addDirectory(dir: String?, onAddUnit: () -> Unit) {
+        val handler: AsyncQueryHandler = object : AsyncQueryHandler(context.contentResolver) {
+            override fun onInsertComplete(token: Int, cookie: Any?, uri: Uri) {
+                onAddUnit.invoke()
+            }
+        }
+
+        val file = ContentValues()
+        file.put(GameDatabase.KEY_FOLDER_PATH, dir)
+        handler.startInsert(
+            0,  // We don't need to identify this call to the handler
+            null,  // We don't need to pass additional data to the handler
+            GameProvider.URI_FOLDER,  // Tell the GameProvider we are adding a folder
+            file
+        )
+    }
+}