ListView Android performance refactor

appinventor/components-ios/src/ListView.swift

@@ -147,6 +147,15 @@ open class ListView: ViewComponent, AbstractMethodsForViewComponent,
       _view.reloadData()
     }
   }
+
+  // This property is not supported in iOS
+  @objc open var BounceEdgeEffect: Bool {
+    get {
+      return false;
+    }
+    set(addEffect) {
+    }
+  }
 
   //ListData
   @objc open var ListData: String {
@@ -346,6 +355,14 @@ open class ListView: ViewComponent, AbstractMethodsForViewComponent,
 
   // MARK: Methods
 
+  @objc open func AddItem(_ mainText: String, _ detailText: String, _ imageName: String) {
+    _listData.append(["Text1": mainText, "Text2": detailText, "Image": imageName])
+  }
+
+  @objc open func AddItemAtIndex(_ addIndex: Int32, _ mainText: String, _ detailText: String, _ imageName: String) {
+    _listData.insert(["Text1": mainText, "Text2": detailText, "Image": imageName], at: Int(addIndex - 1))
+  }
+
   @objc open func CreateElement(_ mainText: String, _ detailText: String, _ imageName: String) -> YailDictionary {
     return [
       "Text1": mainText,

appinventor/components/src/com/google/appinventor/components/common/LayoutType.java

@@ -0,0 +1,43 @@
+// -*- mode: java; c-basic-offset: 2; -*-
+// Copyright 2023 MIT, All rights reserved
+// Released under the Apache License, Version 2.0
+// http://www.apache.org/licenses/LICENSE-2.0
+
+package com.google.appinventor.components.common;
+
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * Defines a parameter of ListViewLayout used by the ListView component.
+ */
+public enum LayoutType implements OptionList<Integer> {
+  @Default
+  MainText(0),
+  MainText_DetailText_Vertical(1),
+  MainText_DetailText_Horizontal(2),
+  Image_MainText(3),
+  Image_MainText_DetailText_Vertical(4);
+
+  private final int layout;
+
+   LayoutType(int value) {
+    this.layout = value;
+  } 
+
+  public Integer toUnderlyingValue() {
+    return layout;
+  }
+
+  private static final Map<Integer, LayoutType> lookup = new HashMap<>();
+
+  static {
+    for(LayoutType value : LayoutType.values()) {
+      lookup.put(value.toUnderlyingValue(), value);
+    }
+  }
+
+  public static LayoutType fromUnderlyingValue(Integer value) {
+    return lookup.get(value);
+  }
+}

appinventor/components/src/com/google/appinventor/components/common/ListOrientation.java

@@ -0,0 +1,44 @@
+// -*- mode: java; c-basic-offset: 2; -*-
+// Copyright 2024 MIT, All rights reserved
+// Released under the Apache License, Version 2.0
+// http://www.apache.org/licenses/LICENSE-2.0
+
+package com.google.appinventor.components.common;
+
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * Defines a parameter of ListOrientation used by the ListView component.
+ */
+public enum ListOrientation implements OptionList<Integer> {
+  @Default
+  Vertical(0),
+  Horizontal(1);
+
+  private final int orientation;
+
+  ListOrientation(int value) {
+    this.orientation = value;
+  } 
+
+  public Integer toUnderlyingValue() {
+    return orientation;
+  }
+
+  private static final Map<Integer, ListOrientation> lookup = new HashMap<>();
+
+  static {
+    for(ListOrientation value : ListOrientation.values()) {
+      lookup.put(value.toUnderlyingValue(), value);
+    }
+  }
+
+  public static ListOrientation fromUnderlyingValue(Integer value) {
+    return lookup.get(value);
+  }
+
+  public static ListOrientation fromUnderlyingValue(String value) {
+    return fromUnderlyingValue(Integer.parseInt(value));
+  }
+}